Improvements in Electrically Controlled Elevators or Lifts.
Year: 1899

page_text: COMPLETE SPECIFICATION.
Improvements in Electrically Controlled Elevators or Lifts.
I, HAROLD ROWNTREE, of 76, West Jackson Street, Chicago, County of Cook,
State of Illinois, United States of America, Manufacturer, do hereby declare
the nature of this invention, and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following statement.-
This invention relates to automatic electric elevators.
The object of the invention is to provide a construction and arrangement
which 18 simple and efficient for automatically controlling the hoisting motor
of electric elevators
A further object of the invention is to effect the control of the hoisting motor
from any landing on floor at which the car 18 to stop
A further object of the invention is to provide means whereby when the
motor is once put in action it will continue until the car reaches the landing
predetermined upon
A further object of the invention is to provide means whereby the motor
when once put in action cannot be reversed until the car reaches its destination.
A further object of the invention is to provide means whereby the car auto-
matically slows up in advance of stopping, thus coming to rest easily and with-
out shock or jar.
A further object of the invention is to provide means whereby the apparatus
is locked against action so long as the door at any one of the landings remains
open.
Other objects of the invention will appear more fully hereinafter
The invention consists substantially in the construction, combination, loca-
tion and arrangement of parts, all as will be more fully hereinafter set forth,
as shown in the accompanying drawings, and finally specifically pointed out
in the appended claims
Referring to the accompanying diawings and to the various views and refer-
ence signs appearing thereon,-
Fig 1, 18 a view in side elevation of an electic elevator hoisting motor
embodying the principles of my invention.
Fig 2, 18 an elevation of the same looking from the night of Fig 1.
Fig 3, 18 a bioken detail view in section on the line 3, 3, Fig 1, looking
in the direction of the arrows, and showing the contact aim for controlling
the slow-speed cucuit, and the lock therefor
Fig 4, 18 a detached detail view showing the main circuit make and break
switch arms in closed position
Fig. 5, is a broken detail view of the reversing switch, parts in transverse
section
Fig 6, 18 a similar view in longitudinal section of the same, showing the
means for locking the switch against evenise movement
Fig 7, 18 a detail view, the motor shaft being in transverse section, showing
the brake

page_text: Figs. 8 & 9 are detail views respectively in top plan and side elevation of
the reversing switch contacts.
Fig 10, is a view in diagram illustrating the various electric circuits
Fig 11, 18 a similar view showing a slightly modified arrangement of circuits.
Fig 12, is a general view showing the application of my invention to the
operation of dumb-waiters.
Fig. 13, 18 a bioken detail view illustrating, in side elevation, and on an
enlarged scale, locking means for the moto-control devices
Fig 14, is a detail new in top plan of the construction shown in Fig. 13,
parts in transverse section
The same part is designated, throughout the several views, by the same
reference sign.
In carrying out my invention, I employ a motor, designated generally by
reference sign A, and which may be of any suitable, convenient, or well known
construction and arrangement This motor 18 mounted in a suitable manner
upon a base plate B, which forms a support for the framework C, of the apparatus.
In bearings formed in the framework, is journaled the shaft D, of the hoist-
ing drum E, said shaft being duren from the motor shaft through a suitable
arrangement of gears F, indicated in dotted lines in Fig 2 The cable G, which
is attached to the car, and through which the car is to be raised or lowered in
its shaft or well, is designed to be coiled on drum E, in the usual or any con-
venient or well known manner
I will fist describe the construction and arrangement for automatically
controlling the motor so that it will stop only when the car reaches a particular
predetermined point.
This idea may be carried into practical effect and operation in many specifi-
cally different ways While, therefore, I have shown and will now describe a
particular construction and arrangement for accomplishing the desired object,
I desire it to be understood that my invention is not limited or restricted to
this specific construction. In the particular form shown, I journal a woim or
screw shaft H, in suitable bearings in the frame, and I mount a threaded nut
or block J, upon said woim or sciew, to travel thereon when said shaft is rotated,
said block or nut being held against rotation in any convenient way, as by
means of a flange K. formed thereon, arranged to engage a suitable part or
bar of the frame Screw shaft H, is rotated coincidently with the drum E,
and in a coincident duection, through any suitable or convenient arrangement
of gearing, as for instance through a sprocket chain L, respectively engaging
gears on shafts D, and H Arranged parallel and in proximity to screw shaft H,
is a shaft M, mounted to 1ock and also to slide longitudmally in suitable bearings
in the framework. A series of sleeves or collars N, are mounted on shaft M,
each having a lug 0. The collars N, are adjustable rotarily upon shaft M,
and are relatively arranged so as to present the lugs O, thereof in spiral rela-
tion around said shaft In practice I employ as many of the stop collars as
there are floors or landings at which the car is intended to stop. The stop
collars are so relatively arranged that when the apparatus is set for the car to
stop at the first landing from the bottom, for instance, the shaft M, 1s 10cked
in its bearings into position for the lug 0, on the second stop collar to be brought
into line with the traveling nut or block J, whereby as the car approaches the
desired stopping point the tiaveling nut will engage the lug of the stop collar,
and hence move stop shaft M, longitudinally in its bearings By arranging the
stop collars so that the lugs O, thereon may occupy relative positions spirally
around the stop shaff, it will be readily seen that by rotating said stop shaft
the desired extent the stop collar conesponding to any desired floor will he
thus brought into position for the lug 0, thereon to be in the path of the travel-
ing nut J, and that said nut will pass by without engaging any intermediate
stop collar until it reaches the particular one brought into its path When
this point is reached, which as above explained occurs when the car is approach-

page_text: This
ing the particular floor or landing at which it is to stop, the traveling nut engages
the lug on the stop collar and eňects an endwise movement of the stop shaft M.
This endwise movement is effected in whichever direction the nut travels when-
ever the stop shaft 18 rocked into suitable position to bring a stop collar into
ta nath. Pivotally supported from a collar P, carried by the end of the stop
shaft, is a
a lever or fiame Q, arranged to fieely bear, intermediate its ends,
against a bracht R, carried by the tame, and also at the fiee end thereof
against a bracket or arm S. A stout spring T, (see Fig 2) 18 connected at one
end to lever Q, and at the other to the frame C, of the machine, said spring
being preferably located between the brackets R, S, and operating to yieldingly
maintain said lever Q, pressed against said brackets. From this construction it
will be seen that when stop shaft M, 18 moved longitudinally in one duection
the lever Q, is rocked about one of the brackets as a bearing point or fulcrum,
and when said shaft 18 moved longitudinally in the other duection, said lever
rocks about the other of said brackets as a bearing point or fulcium, and that
in either case the rocking movement of said lever is opposed by spring T Fol
instance, suppose shaft M, is moved longitudinally towards the left from the
position occupied thereby in Fig 2, or towards the night in Fig 3, it will be
headily seen that the lever Q, will fulcium at the free end thereof against
bracket S, as a bearing, and if shaft M, is moved longitudinally towards the
1ight, said level will fulcrum about the bracket R, and in either case, that
portion of said lever lying between the brackets R, S, will move outwardly or
away from the fiame of the machine in whichever duection the shaft M, 18
moved longitudinally. Attached to level Q, at a point between the points of
contact of said level with the brackets R, S, is an aim 15 (see lig. 3)
arm is longitudinally slotted, as at 16, to receive a pin or support 17, by which
it is held and guided The guide pin 17, 18 carried by a frame 18, suitably
pivoted or hinged upon a od 19, mounted in the fiamework of the machine,
and canes the main switch aims 20, 21, said switch arms being insulated fiom
said frame 18, and anlanged respectively to be snapped into and out of contact
with the spring contacts 22, 23, 24 & 25, the contacts 24 & 25 controlling the
main supply circuit and the contacts 22 & 23 controlling the retuin encuit.
These contacts are suitably mounted upon an insulating base or plate 26, of
slate, marble, fiberite or the like, and are respectively included, as above ex-
plained, in the circuit of the main supply and ietuin wires, as seen in the dia-
giam, Fig 10. On the insulating plate 26, 18 pivotally mounted an auxiliary
switch lever 27, aanged in the particular form shown, but to which the inven-
tion is not limited or restricted, in the form of a bell crank lerei pivotally sup-
ported at the angle Upon one of the aims of such bell ciank lever is mounted
a switch arm 28, which is arranged to co-operate with a pan of contacts 29, 30,
to control the resistance o auxiliary field coil circuit through which the motor
18 slowed down as the can approaches the particular landing or floor at which
The switch aim 28,
it is to stop, as will be explained more fully hereinafter
18 held normally out of contact with contacts 29, 30, by means of a latch 31,
The latch 31, is eanied by
arranged to engage a lug 32, formed on level 27
or foims part of the fiame 18, and the parts are so relatively arranged that
when the main switch aims 20 & 21 are in engagement with their respective
contacts 22, 23, 24, 25, that 18, when the motor working circuit is closed, the
latch 31, 18 m engagement behind lug 32, on lever 27, and hence operates to
lock said level against movement A spring 33, 18 connected at one end to
arm 34, of level 27, and the other end thereof is connected to a fixed part of the
frame, the tension of said sping being exerted to 1ock lever 27, in à duection
to move the contact am 28, away from its co-operating contacts 29, 30
sping 35, 18 connected at one end to the aim 15, oi to level Q, and at the other
end is connected to lutch 31, said sping exerting a tension upon said latch,
and hence also upon frame 18, when lever Q, 18 1ocked, and in a direction to
throw the main contact aims 20, 21, out of engagement with their respective
A

page_text: contacts. The arm 15, canies a set-sciew 36, arranged to engage the arm 34,
of level 27, and to lock said level when the aim 15, 18 moved by the outward
swing of lerei Q By providing arm 15, with an elongated slot 16, it will be
observed that said aim is permitted considerable travel ielative to the frame 18,
and this travel, it will be seen, imposes a tension on spring 35, which thus
aids spring T, (see Fig 2) in opposing the locking movement of lever Q, and
at the same time stores up energy, so to speak, to quickly cause the contact
arms 20, 21, to snap out of contact with then respective contacts as soon as
latch 31, is freed from lug 32 The same outward movement of aim 15, causes
the end of set-screw 36, to engage aim 34, and hence 1ock level 27, in a duec-
tion to fiee the lug 32, thereof from the end of latch 31.
The operation of this part of my invention is as follows:
When the car 18 at 1est at any landing the switch aims 20, and 21, are out
of contact with their contact points 22, 23, 24, and 25, and the contact am 28,
18 in contact with its contacts 29, 30, and the switch arm 49, is in one on the
other of its positions according to the direction in which the car has travelled
to reach the landing at which it is standing, and the shaft M, has been shifted
longitudinally by the particular lug N, corresponding to the landing at which
the car is stopped, thereby rocking lever Q, as descubed Now, when it is
desired to cause the cai to proceed from this landing to some other landing,
the pointer 81, 18 moved to the point corresponding to the next floor oi landing
to which the car is to proceed This movement, through connectious 76, effects
a 1otation of shaft M, axially This rotation 10chs switch arm 49, to proper
position to send the car in the opposite direction to that in which it has pie-
viously travelled, or leaves such aim unaffected if the car is to proceed in the
same direction as before The axial 1ocking unparted to shaft M, canes the
lug 0 out of engagement with nut J, thereby causing the sping T, to shift
the shaft M, longitudinally until the lug N, coresponding to the new predeter-
mined stopping point is engaged with nut J The shifting longitudinally of
shaft Mocks levei Q, and causes switch aims 20, 21, to snap into operative
contact with contacts 22, 23, 24, 25, and also causes contact arm 28, to snap out
of contact with contacts 29, 30
Suppose it is desired that the car stop at a particului floor The stop shaft M,
is accordingly set or axially rotated until the stop collar N, corresponding to
that particular floor 18 brought into the path of the traveling nut J The
motor thereupon starts up, as under the conditions shown the main cucuits are
completed, that is, the switch aims 20, 21, are closed upon then contacts, and,
as will be explained more fully bereinafter, the movement of the shaft M, to
proper position effects also the proper actuation of the reversing switch to com-
plete the motor operating circuits, and in the proper direction
The car pro-
ceeds upon its travel, while the traveling nut J, also and corespondingly
advances along the sciew shaft H Finally this nut engages the stop collai,
and in the manner described effects a longitudinal movement of stop shaft M,
and hence a 10ching movement of lever Q, which causes with it the aim 15
This movement begins as the can approaches the point at which it is to stop
The set-screw 36, canied by aim 15, engages am 34, of lever 27, and hence
gradually 1ocks said lever in a direction to cany contact aim 28, into contact
win the contacts 29, 30 This contact 18 effected before the latch 31, 18 e-
leased, and, as will be more fully explained hereafter, completes a cncunt
which causes the motor to slow down. The continued movement of lever Q,
and aim 15, finally causes bell canh lever 27, to rock far enough to disengage
the end of latch 31, from lug 32 This point is reached when the car reaches
the floor or landing at which it is to stop, and immediately the disengagement
of said latch and lug is effected. The tension of spring 35, causes the frame 18,
to swing outwardly upon its support 19, thereby carrying the aims 20, 21,
out of engagement with contacts 22, 23 & 24, 25, respectively, thereby breaking
the motor circuits and applying the brake, presently to be described, and hence

page_text: stopping the car By returning the stop shaft M, to its initial position, the
stop collar which has been engaged by nut J, to effect the operations above
described, 18 freed from said nut, thereby permitting said shaft to be returned
o moved longitudinally to its initial position under the influence of spring T,
acting upon lever Q. The return of Baid lever Q, to its bearing against the
brackets R, S, also causes the aim 15, to move backwardly or towards the left
from the position thereof shown in Fig 3, thus moving set-screw 36, away
fiom aim 34, of lever 27, and hence permitting spring 3, to throw aim 28,
out of engagement with contacts 29, 30, thus disi upting the slow speed cncunt
It will also be seen that when the pin 17, ieaches the limit of slot 16, during
such backward movement of am 16, said pin will be caused along with the
aim, and since said pin is connected to, or 18s mounted in, swinging fiame 18,
said fiame is swung in a duection to cause aims 20, 21, to snap into engagement
with the respective co-operating contacts, thus restoring the apparatus to
condition to be operated It is above stated that the stop shaft M, is returned
to its initial position in order to restore the apparatus descubed to condition to
be operated It is obvious, however, that instead of returning aid shaft to its
initial position, it may be moved to position corresponding to any other floor
or landing at which it may be desued to stop the car, thus bringing another
stop collar into the path of traveling nut J, whereupon the motor starts up,
and as the car approaches the landing determined upon the nut engages the
collar, causing the stop shaft to be moved longitudinally and repeating the
operation above described, at first throwing am 28, into engagement with its
co-operating contacts 29, 30, and hence completing a cucu which esults in
slowing down the motor, and finally breaking the motor encuit when the ca
reaches its landing In this manner the car is brought to rest easily and with-
out shock or jai, and exactly on a level with the desired landing. By adjusting
set-screw 36, it will be seen that the exact point at which the latch 31, is freed
from lug 32, and hence the exact moment the main or operating cucuit contacts
are broken, may be nicely adjusted and regulated
It will be understood that the operation above described takes place whenever
shaft M, is moved longitudinally, whether in one duection of the other, for
when said shaft is moved in one direction the lever Q, fulcrums about its con-
tact at R, and when said shaft is moved in the other duection said lever ful-
crums about its contact at S, and in either case that portion of the lever Q,
lying between the bearing points R, and 8, moves in a direction outwardly or
away from the machine fiame, and since the aim 15, (see Fig 1) and spring T,
(see Fig 2) are connected to said lever Q, at points between its beating con-
tacts at R, and S, it will be seen that in whichever dection shaft M, may move
when the traveling nut J, engages a stop collai N, theicon, the aim 15, will
always be moyed in the same duection, and said aim when so moved causes the
stop 36, to engage aim 34, and 1ock lever 27, to fist can the contact arm 28,
into engaging relation with its contacts 29, 30, and then to disengage or release
the catch 31, 32, all as above explamed
It is important that when the stop shaft M is tocked in one direction or
the other, as above explained, to set the apparatus for a definite and predeter-
mined cycle of operations, the duection of current must also be suitably regu-
lated, to the end that the motor will operate in the desned duection Therefore,
the reversing switch by which the direction in which the motor operates 18
controlled, should bear a definite co-operative relation to the movements of the
stop shaft. I will therefore now descube the construction, aangement and
co-operative relation of the reversing switch, it being understood that the
particular form shown is designed merely as an illustrative embodiment of
operative means, and to which the invention is not to be limited or restricted
In the particular form shown, I am ange the stop shaft M, to pass longitudinally
though a sleeve 38, (see Figs. 2, 5 & 6) which is suitably journaled in bearings
formed in the framework. This sleeve is splined to rotate with the shaft ,

page_text: but permits said shaft to move longitudinally therethrough Upon said
sleeve 38, 18 mounted a gear 19, through which, in a suitable manner, the lock-
ing movements of stop shaft M, are controlled Suitably mounted on the frame-
work is an insulating plate 40, caying a series of contacts 41, 42, 43, 44, 45,
46, 47, 48, suitably arranged to control the duection of flow of current through
the motor circuits, as will be more fully hereinafter explained A casting oi
plate 49, is loosely mounted to swing upon sleeve 38 Caned by this plate is
a sheet 50, of insulating material, upon which is mounted conducting plates 51,
52 Upon each of these conducting plates is pivotally mounted a pan of
arms 53, 54, each caning a socket 55, in the fiee end thereof, in which 18
mounted a carbon or other suitable contact point 56, arranged to co-operate
with the series of contacts 41, 42, 43, 44, 45, 46, 47, 48, the pair of carbons or
points called by plate 51, serving to budge the space between contacts 41,
and 42, and those caned by plate 52, budging the space between contacts 43,
44, when the casting or plate 49, 15 swung to its limit in one direction, and the
same paits bidging the space between contacts 48, 47, and 46, 45, respectively,
when said casting or plate 49, 18 swung to its limit in the opposite duection
The several contacts 41, 42, 43, 44, 45, 46, 47, 48, are suitably connected up
in the motor cucuit as will be more fully explained hereinafter to control the
dnection in which the motor is to operate according to the duection in which
the casting on plate 49, is swung.
In order to secure the co-operative action of the reversing switch and stop
shaft M, to which reference has hereinbefore been made, it 18 important to
provide means whereby, when said shaft is 10cked in one duection on the
other, the casting or plate 49, 18 correspondingly swung or locked
From
Many specifically different arrangements may be employed for accomplishing
this result. Therefore, while I have shown and will now describe a specific
arrangement for accomplishing the desued object, it is to be understood that
my invention 18 not limited or restricted thereto In the form shown, I pio-
vide two sets of 1atchet teeth 57, 58, upon the sleeve 38, the ratchet teeth 57,
presenting in the opposite dnection with respect to the ratchet teeth 58, and I
pivotally mount upon casting or plate 49, two pawl aims 59, 60, the engaging
ends of said aims arranged to straddle the sleeve 38, the one 59, on one side
engaging the ratchet teeth 68, and the one 60, on the other side engaging the
1atchet teeth 57 A spring 61, operates to draw the pawl aims together
this construction it will be seen that when sleeve 38, and with it the stop
shaft M, 18 rocked in one duection, say towards the night or with the hands of
a clock, as viewed in Fig 5, the teeth of ratchet 58, will engage the end of pawl
arm 59, and correspondingly swing plate or casting 49, and with it the contact
points or carbona 56, into co-operative relation with the contacts 48, 47, 46, 45,
the pawl 60, 11ding idly over the teeth of its ratchet 57 Similarly, when the
sleeve 38, and with it stop shaft M, 18 1ocked in the opposite direction, the teeth
of ratchet 67, will engage pawl aim 60, and swing the plate or casting 49,
towards the left, or into the position shown in Fig 5, the pawl aim 59, riding
idly over the teeth of its ratchet 58.
When the plate or casting 49, has reached the limit of its swing in one
direction on the other, that is, when the apparatus has been set for the car to
stop at a certain landing, it is desirable that the apparatus be so arranged that
the car after stopping at the desned landing may subsequently proceed upon its
travel in the same direction to some other floor or landing In order to accom-
plish this result the stop shaft M, must be locked or rotated to a further point
in the same direction as that in which it has been previously rocked, in order
to release the stop collar thereon fiom engagement with the traveling nut J,
and to bring another stop collar corresponding to the next landing place at
which the car is to stop, into the path of the traveling nut This fuithei
rotation of sleeve 38, and shaft M, in the same duection, however, must be
effected without any further swing of the plate or casting 40, for the reason

page_text: that said plate or casting has been previously swung to its limit when the stop
shaft was first rocked, and as the car is to proceed in the same direction as,
before, no reversal of the direction of the current is required. In order, there-
fore, to permit of the further 1otation of sleeve 38, without a further swing of
the casting or plate 49, under the conditions named, it is necessary to disen-
gage the pawl which effected the initial swing of such plate or casting from
its ratchet Therefore, I provide the stop pins 62, in the frame of the machine,
and arrange the same to iespectively engage the pawls 59, 60, when the plate
or casting 49, is swung to one of its limits on the other, and disengage said
pawls For instance, in the position of the parts as shown in Fig 5, the
pawl 60, through which the plate 49, was swung to its position, is shown thrown
out of engagement with its ratchet by said pawl coming into engagement with
a pin 62. By this arrangement sleeve 38, and shaft M, may be rocked further
and further in the same direction without carrying the contact-cariying plate 49,
beyond the position to which it is swung with said sleeve and shaft at the first
operation thereof, while at the same time any leverse rotation oi rocking move-
ment of said shaft and sleeve would be at once communicated to the plate 49,
to cause the same to be swung to its opposite limit, thus bringing the contacts
and points into suitable relation to reverse the motor.
In order to prevent the sleeve 38, and shaft M, fiom being 1otated too far,
that 18, in order to lock said parts against further rotation in the same duection
when they have been 1otated or rocked to positions corresponding to the extreme
limits of travel of the car, I mount a collar 63, on said sleeve, and provide the
same with flanges (4, aanged to engage at the desued limits a pin on projec-
tion 65, on the framework of the machine (See Figs. 2 & 6)
In
After the sleeve 38, and shaft M, together with the reversing switch, have
been set in the desued positions to cause the car to stop at any desired point
or landing, it 18 desuable, and as a matter of safety, to provide means whereby
the reversing switch is locked against movement in a direction to reverse the
motor until the car anives at the landing previously determined upon This
locking of the reversing switch may be effected in many different ways In
the drawings I have shown a simple and efficient construction for accomplishing
the desired object, but I do not desne to be limited on restucted thereto, ns
many variations therefiom and changes theiein would readily occur to persons
skilled in the ait and still fall within the spirit and scope of the invention.
the form shown, I provide the reversing switch plate or casting 49, with a lug
o projection (6, and I mount a od 67, to slide longitudinally through a bear-
ing in the framework of the machine, the free end of said rod aanged, when
projected end ise, to engage on one side or the other of said lug 66, when the
leveising switch plate is thrown to one limit on the other, thereby preventing
said switch plate from being moved in the opposite duection until the 1od 67,
is withdrawn from its engagement with said lug 66 In order to secure the
proper co-operative action of said locking rod 67, with respect to the other parts
of the apparatus, so that when the car stops at any landing said locking 10d
is withdiawn automatically from engagement with lug 66, thereby enabling
the reversing switch to be moved as desned, but as soon as the said switch is
Bet in the desired position, which, as above explained, 18 coincident with the
actuation of stop shaft M, and hence when said stop shaft returns to its normal
position with respect to its endwise movement, then it is important that the
locking 1od be again projected to engagement with lug 66, on one side of the
other thereof according to the position occupied by the switching plate
accomplish this, I pivotally connect rod 67, to the free end of a lever 68, pivot-
ally mounted at the opposite end upon a convenient part of the framework
This lever 68, is connected by link 69, with lever Q, and hence moves therewith.
From this construction it will be seen that so long as lever Q, remains in its
normal or retracted position, and hence so long as the motor is operating and
the car is traveling in either direction, the stop 1od 67, 18 in locking position
To

page_text: with respect to the reversing awitch, and hence said switch cannot be thrown
until the car arrives at its destination. When this point is reached the nut. J,
has engaged the stop collar on shaft M, and has projected said shaft and hence
has rocked lever Q, and therefore, through link 69, and lever (18, the locking
rod 67, 19 withdrawn, thus enabling the reversing switch to be thrown if desired
o required for the next movement of the cal The moment the stop shaft is
again rotated to be set for the next stop of the car, whether said shaft is rotated
still further in the same duection or is reversely 1orked, the stop collar thereon
which has just been engaged by the nut J, 19 released therefrom, hence permitt-
ing the lever Q, and shaft M, to return to their normal positions, and causing
rod 67, to be again projected into locking relation with respect to the reversing
Bwitch
Of course it will be understood that the travel of nut J, bears a definite rela-
tion to the travel of the car, and the stop collars N, are spaced a distance apart
corresponding to the distance traveled by the nut J, during the travel of the
car from one stopping point or landing and the one next adjacent thereto
In the foregoing desciption I have referred to the fact that the moment the
car arrives on a level with the floor or landing at which it is to stop, the motor
circuit is broken by arms 20, 21, snapping out of engagement with their rea-
pective contacts, and the brake 18 applied. In Figs. 1 & 7 I have shown a simple
and efficient arrangement of brake, of the strap type, wherein I mount a brake
wheel or disk 70, upon the motor shaft, and I arrange a strap 71, around said
wheel The ends of said stiap are connected at suitable points on a pivoted
lever 72, so that when said lever 18 1ocked in one duection the strap 18 diawn
tight around the wheel, thereby tending to anest the rotation thereof, and
when said lever is rocked in the other dnection the strap 18 loosened upon
said wheel A weight 73, caned upon the end of said lever, operates to normally
set or tighten the brake strap upon the brake wheel. A solenoid 74, 18 mounted
adjacent to the brake level, and the core of said solenoid 18 connected thereto
through a link 75, in such manner that when the coils of said solenoid are
energized the core thereof, through its connection with the brake lever, 1ocks
said lever against the action of weight 73, and in a direction to release the
brake strap. In order that, the brake may operate at the required time, I
arrange the coils of the solenoid in the main circuit of the motor, as clearly
indicated in the diagram in Fig 10, and therefore, as soon as the motor circuit
is broken by arms 20, 21, being thrown out of engagement with their co-operat-
ing contacts, then the core of the solenoid is released and the brake is applied
under the influence of the weight 73
In the foregoing description I have referred to the fact that the various
operations mentioned are controlled though the rocking movement of sleeve 38,
and stop shaft M. It is evident that the rocking movement of said sleeve and
shaft may be effected from the car on from any desued point, through suitable
control cables 01 otherwise in a manner familiar to persons skilled in the art
However, and in order to illustrate the application of the principles of my
invention, I have shown in Figs 12, 13 & 14, an arrangement whereby the
1ocking movements of said sleeve and shaft. are controlled from each landing
at which the car 18 designed to stop, aa, for instance, in the operation of dumb-
waiters, to which the invention is particularly adapted. In this construction
I have shown a cable connection 76, preferably, though not necessarily, in the
form of an endless sprocket chain, arianged around gear wheel 39, on sleeve 38,
and extending throughout the elevator shaft or well At each landing I mount
a sprocket wheel 77, around which said chain passes, whereby by suitably turn-
ing a control wheel at any landing, not only is the gear 39, rotated, thereby
rocking sleeve 38, and shaft M, but also the sprocket gear at each of the other
landings is also, and comcidently, rocked The gears 77, are each mounted on
a shaft or support 82, to which is connected a lever 80, having a pointer 81,
co-operating with a dial plate 83, and since the several gears move coincidently

page_text: or in unison, it will be readily seen that the dial plate at each landing will
indicate the position of the car. Each dial plate is marked for each landing or
stopping point of the car, and when any one of the pointers 18 moved to any
particular mark on its co-operating dial, not only will all the other pointers
be moved to a corresponding position, but the sleeve 38, and with it shaft M,
will be rooked into position to set the apparatus to move the car to the particular
landing indicated by the dial, and when the car reaches that point the motor
will be automatically arrested
In the proper operation of the system, and in the interest of safety, it is
desirable to provide means whereby, when the car arrives at any floor or land-
ing and stops, the apparatus should be locked while the passengers or freight
are being loaded or unloaded This idea may be carried out in many different
ways. For instance, in the form shown, fo which, however, the invention is
not limited, I provide a lock operated by the movements of the door of the shaft
or well, and so arranged that when the door 18 opened the apparatus is locked,
and when the door is closed the apparatus is free to be operated In the parti-
cular form of apparatus shown, embodying these principles, but to which my
invention is not limited or restricted, I mount a toothed wheel 84, upon the shaft
or support 82, of each sprocket gear 77, and I pivotally mount a lever 78, upon
a convenient part of the framing of the shaft or well, in position for the free
end thereof to extend over its co-operating toothed gear, and I provide each
lever with teeth or lugs 79, arranged to intermesh with and lock the toothed
gear 84, whenever said lever is permitted to rest upon its gear
Any desired
arrangement may be provided for disengaging said levers from their toothed
gears whenever the door adjacent thereto is opened, the particular arrangement
employed varying in the details thereof according as the door 18 a swinging
door, a vertical sliding door, a horizontal sliding door, or the like In the form
illustrated I have shown vertical sliding doors, employing counter-weights 85.
connected in the usual war by cords 86, to the door, and I so relatively arrange
the counter-weight of each door with respect to the locking lever 78, at the
same landing therewith, that when the door is closed the counter-weight will
engage the free end of the locking lever and lift the same so as to disengage
the lugs or teeth thereon from engagement with its toothed gear, thereby un-
locking the apparatus, as shown at the upper portion of Fig 12, and when the
door 18 181sed the downward movement of the counter-weight removes the
elevating support of the lever, and hence will permit said lever to engage its
gear 84, as shown in Fig 13, and at the bottom of Fig 12 As shown in Fig 14,
the end of the lever 78, may be slotted as at 87, to permit the counter-weight
cord 86, to pass therethrough.
From this description it will be seen that whenever a door at any one of
the landings or floors is opened the entire apparatus is locked and cannot be
operated from any other point until all the doo18, are closed, thus efficiently
providing against danger or accident
I will now describe the motor circuits and then leads, and the electrical
operation, particular reference being had to the diagrams, Figs 10 & 11
Current is supplied from a main wie a, drawing current from any suitable
source, and which is connected to contact 24 When contact arm 21, is closed
upon contacts 24, 25, the positive encuit is established as follows. from main
supply wire a, to contact 24, aim 21, contact 25, wie b, then dividing, part of
the current continuing through wie c. the shunt field coils of the motor, wire e, the
series field coils of the motor wie f, contact 23, aim 20, contact 22, to retuin
wire g.
The other branch leads from wire b, though we d, to contact 41,
which is also in electrical connection with contact 48, of the reversing switch
Now, suppose the reversing switch to be thrown to the left from the position
thereof as indicated in Fig 10, that is, so as to bring the two contacts 56, of
the plate 51, (see Figs 6, 8 & 9) respectively into contact with contacts 41,
and 42, the space between contacts 41, and 42, 19 thereby budged Contact 42,

page_text: is electrically connected to contact 46; therefore the circuit continues to' con-
tact 46, thence by wire h, through the motor armature, returning by wire k,
to contact 47, which is electrically connected to contact 43 Now, under the
conditions above stated the reversing switch is thrown to the left, thereby
bridging the space between contacts 43, 44, by means of the two contacts car-
ried by the plate 52, and hence completing the 'circuit to contact 44
This
contact is in electrical connection with contact 45, and from thence the circuit
continues through wire m, the series windings of the motor field wire f, to
return wire g, as above described Similarly, if the reversing switch 18 thrown
to the right from the position thereof as indicated in Fig 10, thus bridging
the space between contacts 48, 47, and between contacts 46, 45, the encuit will
be as follows: wire d, contact 48, contact 47, wire 1, the motor armautre wind-
ings, wire h, contact 46, contact 45, wie m, and on as before the only difference
being that the direction of the current through the motor armature 18 1eversed,
thereby reversing the action of the motor It will thus be observed that in the
particular form shown, to which the invention is not limited, I employ a com-
bination of shunt and series windings for the motor field, That is, a portion
of the main current is shunted through the motor field, and a portion after
passing through the motor amature also passes in series through a portion of
the field In addition, that part of the current which is shunted through the
field also passes through the series coils of the motor field I have found in
practice that such arrangement produces a very satisfactory and steady operation
of the motor
In order to secure the slowing down of the motor as the car approaches the
particular landing at which it is to stop, the contact arm 28, actuated as above
described, at the proper point in the operation, closes upon contacts 29, 30,
thereby establishing a branch circuit as follows: from contact 25, through
wire m, to contact 29, arm 28, contact 30, wie p, resistance R¹, wie f. through
the series field coils, and to return wire f. Thus the completion of this branch
circuit, which occurs somewhat in advance of the breaking of the main circuit,
divides the operating current and shunts through the field coils a portion thereof
which has previously been flowing through the armature, thereby strengthening
the field and also reducing the armature current, and hence operating as an
electrical retarden or biake to reduce the speed of the motor This operation
takes place, as above explained, just before the car arrives at the point where
it is to stop, and therefore when the motor circuit is completely bioken by the
arms 20, 21, leaving their respective contacts, the speed of the motor has been
reduced, thus bringing the car to rest at the required point, easily and gently,
and without shock or jar
In Fig. 11, I have indicated a slight modification wherein, instead of securing
the slowing down of the motor as the car approaches the point at which it is to
stop by shunting a portion of the operating current through an external resist-
ance and thence through the field coils, I shunt such portion of the current
directly through auxiliary field coils, thus utilizing the current which in the
first case expended its energy largely in merely heating up the resistance coils,
and without performing useful work, by sending such current through a portion
of the field itself, thus largely increasing and building up the field, and hence
reducing the speed This result I secure by passing the current from the main
supply conductor through wire 61, whence it divides, part going through wire c¹,
the shunt field coils, thence back through the series field coils, wire f', and to
the return conductor The other part of the main current passes through
wire d, the motor armature, wire A, the series field coils, and on to the return
conductor. So far, the operation and arrangement of circuits is the same in
all essentials as described with reference to Fig. 10 In order to secure the
slowing down effect of the motor, the switch aim 28¹, which may be identical
in construction and operation with that above described with respect to arm 28,
is closed, thus completing a branch oi shunt circuit as follows: from the main

page_text: supply conductor through wire m², switch 28', wire p¹, the auxiliary field coils
marked "slow speed ahunt," in the diagram Fig. 11, thence through the series
field coils to the return conductor, as before described
Thus it will be seen that when the car is at rest the switch arms 20, 21, are
out of engagement with their respective contacts, and the motor circuit is broken,
and when the car is moving the switch arms 20, 21, are closed and switch
arm 28, 18 open. As the car approaches the point previously determined upon
as its stopping place, the arm 28, is automatically closed, thus establishing the
slow speed shunt circuit and sending a portion of the operating current either
through an external resistance coil and thence through the series field coils
to return, as in Fig. 10, or else through auxiliary field coils and thence through
the series field coils to return, as in Fig. 11, and in both cases reducing the
current sent through the armature, thus reducing the speed by increasing the
field Finally when the car reaches the point at which it is to stop the switch
arms 20, 21, are snapped out of contact with then contacts, thereby breaking
the motor circuit, and hence causing the mechanical biake to be applied.
It will be seen that the reversing switch is so arranged that it can be moved
only when the switch aims 20, 21, are out of engagement with their contacts,
and hence when no current is Howing through the motor circuits, therefore
avoiding danger and damage resulting from aics or flashes at the reversing
switch.
It is obvious that the principles of my invention may be embodied in a wide
variety of specific forms of apparatus and still fall within the spirit and scope
thereof I do not desue, therefore, to be limited or restricted to the exact
details of construction and arrangement shown and described
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim 18.
1 In an elevatoi, a hoisting motor, circuits therefor, and
matically reducing the curent passing through the motor
car appiouches any predetermined stopping point, as and for
forth.
means for auto-
amature as the
the purpose set
2. In an elevator, a hoisting motor, cucuits therefor, and means for auto-
matically shunting part of the amature current around the armature as the
car approaches any predetermined stopping point, as and for the purpose set
forth
3. In an elevator, a hoisting motor, circuits therefor. switches for control-
ling said circuits, a shunt circuit around the motor armature, an auxiliary switch
for controlling said shunt circuit, and means for automatically operating Baid
auxiliary switch as the can approaches any predetermined landing, as and for
the purpose set forth.
4 In an elevator, a hoisting motor, cucuits therefor, main switches for con-
trolling said circuits, a shunt cucuit around the motor armature, an auxiliary
switch for said shunt cncuit, and means for closing said auxiliary switch in
advance of the opening of said main switches, as and for the purpose set forth.
5. In an elevator, a hoisting motor, circuits therefor, and means for auto-
matically shunting a part of the motor armature current through the motor
field as the cal approaches any predetermined stopping point, whereby the
field 18 strengthened and the speed of the motor is reduced, as and for the
purpose set forth
6. In an elevator, a hoisting motor, cucuits therefor, and means for auto-
matically strengthening the field of the motor as the car approaches any pre-
determined stopping point, as and for the purpose set forth.
7 In an elevator, a hoisting motor, circuits therefor, a shunt circuit through
the motor field coils, a switch for controlling said shunt circuit, and means for

page_text: automatically closing said switch as the car approaches any predetermined stop-
ping point, as and for the purpose set forth
8. In an elevator, a hoisting motor, amature and field circuits for said
motor, an auxiliary field circuit in shunt with the armature circuit, and means
for automatically closing said auxiliary circuit as the car approaches any pre-
determined stopping point, as and for the purpose set forth
9 In an elevator, a hoisting motor, armature and field circuits therefor, a
portion of the field circuit being in series with the armature, an auxiliary
field circuit in series with the series portion of the field circuit, but in shunt with
the armature, and means for closing said auxiliary circuit as the car approaches
any predetermined stopping place, as and for the purpose set forth.
10. In an electric elevator, a motor, circuits therefor, a shunt circuit across
the armature and through the field, and means for automatically closing said
shunt circuit as the car approaches any piedetermined stopping point, as and
for the purpose set forth
11. In an electric elevator, a motor, cucuits therefor, a main switch for con-
trolling said circuits, a slow-speed euenit for said motor, an auxiliary switch
for controlling the same, means operating in unison with the travel of the car
for actuating said switches, said means operating to close said auxiliary switch
in advance of the opening of said main switch, as and for the purpose set
forth
12. In an eléctric elevator, a motor, a main switch for controlling the cir-
cuits of said motor, a speed-reducing cucuit, an auxiliary switch for controlling
the same, a trip for maintaining said auxiliary switch open, and means operated
in unison with the travel of the car for releasing said trip as the car approaches
a stopping point, as and for the purpose set foith
13 In an electric elevator, a motor, circuits therefor, a main switch for con-
trolling said circuits, a speed-reducing circuit in shunt with the motor armature
circuit, an auxiliary switch for controlling said shunt circuit, a latch arranged
to retain said auxiliary switch open, said latch connected to move with said
main switch, and means operating as the can approaches a stopping point for
disengaging said latch, as and for the purpose set forth
14 In an electric elevator, a motor, circuits therefor including a speed-
reducing circuit in shunt with the aimature cucuit, a switch for controlling
the main cucuits of said motor, an independently mounted switch for control-
ling said shunt encuit, means whereby when said main switch is closed said
independent switch 18 opened, and means for closing said independent switch
in advance of the opening of said main switch, as and for the purpose set forth.
15 In an elevator, a motor, circuits therefor including a speed-reducing
circuit, a switch for the main working circuit, an auxiliary switch for the
speed-reducing encuit, a nut mounted to travel in unison with the car, and
means aanged to be engaged by said nut as the car approaches a stopping
point for closing said auxiliary switch, as and for the purpose set forth
16. In an elevator, a motor, cucuits therefor including a speed-reducing
circuit, a switch for the main working circuit, an auxiliary switch for the
speed-reducing cucuit, a nut mounted to travel in unison with the car, a ahaft
having stops arranged to be set in the path of said nut, whereby as the car
approaches a stopping point said shaft is moved endwise, and means actuated
by the endwise movement of said shaft for closing said auxiliary switch and
opening said main switch, as and for the purpose set forth.
17 In an elevator, a motor, circuits therefor including a normally open
speed-reducing circuit, a shaft having stops, a nut mounted to travel in unison
with the cai, means for setting said stops in the path of said nut, whereby as
the can approaches a stopping point said shaft is moved, and means actuated by
the movement of said shaft for closing said slow-speed circuit, as and for the
purpose set forth.
18 In an elevator, a motor, circuits therefor, a nut mounted to travel in

page_text: unison with the car, a series of stops corresponding to the various stopping
places of the car, means whereby any one of said stops may be set in the path
of said nut to be engaged thereby, and means actuated by the movement of
said stop for breaking said motor circuits, as and for the purpose set forth
19. In an elevator, a motor, cucuits therefor, a nut mounted to travel in
unison with the car, a 10ck shaft mounted for longitudinal movement and
carrying a series of stops, said stops arranged to correspond to the various
stopping places of the cai, means for locking said shaft, whereby any one of
said stops may be set in the path of said nut, and means actuated by the longi-
tudinal movement of said shaft for breaking the motor cucuit, as and for the
purpose set forth
20 In an elevator, a motor, cucuits therefor including a normally open
speed-reducing cucuit, a nut mounted to travel in unison with the car, a rock-
shaft having stops corresponding in arrangement with the various stopping
places of the car, means for rocking said shaft into position to set any one of
said stops in the path of said nut, whereby as the car approaches the corres-
ponding stopping point said stop is engaged by said nut and said shaft is moved
endwise, and means. actuated by the endwise movement of said shaft for closing
said speed-1educing cucuit, and then as the cal reaches its stopping point,
opening the main working circuit, as and for the purpose set forth.
21. In an elevator, a motor, circuits therefor, a series of stops corresponding
to the various landings at which the car is to stop, means actuated from each
landing for setting any one of said stops into operative position, means actuated
in unison with the travel of the car foi engaging the stop which occupies opera-
tive position and moving the same, and means actuated by the movement of
said stop for breaking the motor circuit, as and for the purpose set forth
22 In an elevator, a motor, cucuits therefor, switches for controlling said
circuits, a lock shaft mounted for longitudinal movement, a senes of stops
mounted on said shaft and coliesponding in relative anangement to the various
landings at which the car is to stop, means whereby said shaft may be locked
to bing any desired stop into operative position, means actuated in unison
with the travel of the cai for engaging the atop occupying operative position,
whereby when the car approaches the landing corresponding to said stop said
shaft is moved longitudinally, and means actuated by the longitudinal move-
ment of said shaft for operating said switches, as and for the purpose set forth
23. In an elevator, a motor, switches foi controlling the circuits of said motor,
a series of stops corresponding respectively to the various landings at which
the car is to stop, means for setting any one of said stops into operative posi-
tion, means actuated in unison with the travel of the car for engaging and
moving the stop which occupies operative position, as the car approaches the
desued landing at which it is to stop, a level arranged to be locked by the
movement of said stop, and connections between said lever and switches for
actuating the latter, as and for the purpose set forth
24 In an elevator, a hoisting motor, switches for controlling the circuits of
said moto, a leven, means operated in unison with the travel of the car for
rocking said lever only when the can approaches the particular landing at
which it is to stop, and connections between said lever, and switches for operat-
ing the latter, as and for the purpose set forth
25 In an elevator, a hoisting motor, a switch for controlling the circuits of
Baid motor, a lever, a spring connected at the ends thereof respectively to said
switch and lever, whereby when said lever is 1ocked said spring is placed under
tension tending to open said switch, a latch for holding said switch closed,
means actuated by said lever for tupping said latch, and means operating in
unison with the travel of the car for 1ocking said lever only as the car approaches
the particular landing at which it is to stop, as and for the purpose set forth
26. In an elevator, a hoisting motor, a switch for controlling the cucuits of
aid motor, a leve, an arm connected to said lever and having a slot, a pin or

page_text: projection carried by said switch, operating in said slot, a spring connected at
one end to said switch and at the other to said level, means for locking said
switch in closed position duing the travel of the cat, and means for rocking
said lever and releasing said lock when the can anives at the particular land-
ing at which it is to stop, as and to the purpose set forth
27 In an elevator, a hoisting motor, a switch, a level, an aim connected to
said lever and provided with an elongated slot, a pin or projection carried by
said switch and operating in said slot, a spring connected at one end to said
switch and at the other to said lever, means for locking said switch in closed
position during the travel of the car, means actuated by the movement of said
arm for releasing said lock, and means operating in unison with the travel of
the car for rocking said lever only as the cai approaches the particular landing
at which it is to stop, as and for the purpose set forth
28. In an elevator, a hoisting motor, a switch for the circuits of said motor,
means for locking said switch in closed position during the travel of-the car,
and means for releasing said lock only when the can arrives at the particular
landing at which it is to stop, as and for the purpose set forth
29 In an elevator, a hoisting motoi, a controlling switch therefor, means for
looking said switch in closed position during the travel of the car, and means
operating in unison with the travel of the car for releasing said lock and open-
ing said switch only when the cai arrives at the particular landing at which it
18 to stop, as and for the purpose set forth.
30. In an elevator, a hoisting motor, a controlling switch therefor, means for
locking said switch in closed position during the travel of the car, means for
imposing a tension on said switch tending to open the same as the car approaches
the particular landing at which it is to stop, and means for releasing said lock
when the car arrives at such landing, as and for the purpose set forth
31 In an elevator, a hoisting motor having a working circuit and a slow-
speed circuit, a main switch for the working circuit, an auxiliary switch for
the slow-speed circuit, means for imposing a
tension on said main switch
tending to open the same as the cal approaches the particular landing at which
it 18 to stop, a latch for holding said main switch closed and said auxiliary
Bwitch open during the travel of the cai, said latch permitting said auxiliary
switch to close before the car arrives at its stopping point, and means for releas-
ing said latch as the car arrives at its stopping point, as and for the purpose set
foith
32 In an elevator, a hoisting motor, a mun switch and a slow-speed switch,
a lever carrying an arm, said aim when moved arranged to engage and operate
said switches, a spring connected at its ends respectively to said main switch
and level, a latch for holding said main switch closed and said slow-speed
switch open, and means for locking said lever only when the car approaches the
particular landing at which it is to stop, as and for the purpose set forth
33. In an elevator, a hoisting motor, a main switch and a slow-speed switch,
a swinging fiame carrying said main switch, a level carrying an arm, said arm
when moved arranged to engage and move said frame and said slow speed switch,
a latch for said frame in position to hold said man switch closed and said slow-
speed switch in open position, and means operating in unison with the travel
of the car for rocking said level only when the car approaches the particular
landing at which it 18 to stop, as and for the purpose set forth
34. In an elevator, a hoisting motor, a swinging frame carrying the main
switch for starting and stopping said motor, a bell crank lever carrying an
auxiliary switch for controlling the slow-speed cucuit of said motor, a lever
carrying a slotted arm having a flange arranged in the path of one arm of said
bell crank lever, said bell crank lever having a lug, a latch carried by said
swinging frame and arranged to engage said lug, thereby constituting a lock
for said switches, said frame having a pin on projection arranged to operate in
the slot in said arm, a spring connected at one end to said frame and at the other

page_text: to said lever, and means for rocking said lever only when the car approaches
the particular landing at which it is to stop, as and for the purpose set forth
35. In an elevator, a hoisting motor, a switch for controlling said motor, a
lever pivotally mounted at one end and having a loose hearing at two different
points in the length thereof, a spring operating to hold said lever in contact
with said bearings, means for moving the pivoted end of said lever whereby it
rocks about one or the other of said bearings according to the direction in
which the pivoted end of said bearing moves, and connections between said
lever and switch for actuating the latter, as and for the purpose set forth
36 In an elevator, a hoisting motor, a switch for controlling said motor, a
framework having bearing projections, a lever pivotally mounted at one end
thereof, a spring normally operating to maintain a bearing of said lever against
said bearing projections, one of said projections arranged at the free end of
said lever and the other intermediate said ends, means for moving the pivoted
end of said lever, whereby said lever is rocked about one or the other of said
bearing projections, and an arm connected to said lever at a point between said
bearing projections, said arm operating to control said switch, as and for the
purpose set forth
37 In an electic elevator, a hoisting motor, a working cucuit therefor, a
main switch for opening and closing said cucnit, a leveising switch arianged
in said circuit, and means for locking said reversing switch against reverse
movement when said main switch is closed, as and for the purpose set forth.
38 In an electic elevator, a hoisting motor, a working cucuit therefor, a
main switch and a reversing switch, 'means operated only when the car arrives
at the particular landing at which it is to stop for opening said main switch,
and means for locking said reversing switch while said main switch is closed,
as and for the purpose set forth
39 In an electric elevator, a motor, a cucuit therefor, a main switch and a
reversing switch, a lever operated only when the car arrives at the particular
landing at which it is to stop for opening said main switch, a lock for the
ieversing switch, and means operated by the movement of said lever to open
the main switch for releasing said lock, as and for the purpose set forth
40. In an electric elevatoi, a motor, a working circuit therefor, a main switch
and a reversing switch, a lock for said eversing switch, a lever for opening
said main switch, means actuated only when the cai arrives at the particular
landing at which it is to stop for locking said level, and connections between
said lever and lock whereby the latter is released when said. main switch is
opened, as and for the purpose set forth
41 In an electric elevator, a motor, a circuit therefor, a main switch and a
reversing switch, a lug formed on said reversing switch, a od arranged to
engage said lug and lock said reversing switch, means operated only when the
cal aves at a predetermined stopping point for opening said main switch,
and connections between said 1od and main switch for releasing said reversing
switch when said main switch is opened, as and for the purpose set forth
42 In an elevator, a motor, a cucuit therefor, a main switch and a reversing
switch, a lug called by said reversing switch, a 1od arranged to engage said
lug, a lever for opening said main switch, means actuated only when the car
arrives at a predetermined stopping point for tocking said level, and connec-
tions between said lever and 1od, as and for the purpose set forth
43 In an elevator, a motor, a controlling switch therefor, a reversing switch,
a stop shaft for actuating said controlling switch, and meaus operated by said
shaft for setting said reversing switch, as and for the purpose set forth.
44 In an elevator, a motor, a main switch, a reversing switch, a 1ock shaft
mounted for longitudinal movement, means actuated by the longitudinal move-
ment of said shaft for opening and closing said main switch, and means actuated
by the rocking movement of said shaft for controlling said reversing switch, as
and for the purpose set forth

page_text: 40 In an elevator, a motor, a main and a leveising switch therefor, a rock
shaft mounted for longitudinal movement and canying a series of stops cones-
ponding in arrangement to the various landings at which the cal is to stop,
means for locking said shaft to set any one of said stops in operative position,
means operated in unison with the movement of the cai, for engaging the stop
which occupies operative position as the car approaches the landing corespond-
ing to said stop, to move said shaft longitudinally, means actuated by the
longitudinal movement of said shaft for operating said mam switch, and means
operated by the rocking movement of said shaft for setting said reversing switch,
as and for the purpose set forth
46 In an elevato a motor, a mam switch and a teveising switch, a lock
shaft mounted for longitudinal movement, means actuated by the longitudinal
movement of said shaft for opening and closing said main switch, means actuated
by the 1ocking movement of said shaft for setting said ieveising switch, and
means for automatically moving said shaft endwise as the car approaches a
predetermined landing, as and for the purpose set forth
47 In an elevator, a motor, a main and a reversing switch, a rock shaft
mounted for longitudinal movement, means actuated by the longitudinal move-
ment of said shaft for opening and closing said man switch, means actuated
by the locking movement of said shaft for setting said reversing switch, a lock
for locking said reversing switch when set, and means for releasing said lock
only when the main switch 18 opened, as and for the purpose set forth
48 In an elevator, a hoisting motor, circuits therefor, a main switch,"
devices for automatically opening said switch only when the car antives at a
particular predetermined landing, and means for locking said devices against
derangement while the car is in motion, as and for the purpose set forth.
49 In an elevator, a hoisting motor, controlling mechanism for starting said
motor, means arranged to be actuated when the car approaches any particular
landing for aesting said motor, and means for locking said motor against
leverse movement during the travel of the car to the landing previously deter-
mined upon, as and for the purpose set forth
50. In an elevator, a hoisting motor, a main switch for starting and stopping
said motor, a stop shaft arranged to be set to correspond to any particular land-
ing at which the car 19 to stop, whereby when the car approaches the predeter-
mined landing the encuit of the motor at the main switch 18 bioken, ratchets
called by said ston shaft, a reversing switch, and pawls called by said revers-
ing switch arranged to be engaged by said ratchets for actuating said reversing
switch, as and for the purpose set forth
51. In an elevator, a hoisting motor, circuits therefor, a main switch, a stop
shaft for operating said switch, a reversing switch, ratchets, having oppositely
arranged teeth, mounted ou said stop shaft, pawls carried by said reversing
switch, and respectively arranged to engage the teeth of said ratchets, as and
for the purpose set forth.
52 In an elevator, a hoisting motor, circuits therefor, a main switch, a stop
shaft, a reversing switch, ratchets operated in unison with the rotary movements
of said stop shaft, pawls called by said reversing switch and arianged to be
engaged by said ratchets, and a stop for locking said reversing switch, as and
for the purpose set forth
53. In an elevator, a framework, a motor, cucuits therefor, a main switch,
a sleeve journaled in a bearing in said framework, a shaft journaled in said
sleeve for rotary movement therewith but capable of longitudinal movement
therethrough, means whereby said shaft governs said main switch, a reversing
switch loosely mounted on said sleeve, said sleeve provided with ratchets, and
pawls carried by said reversing switch and arranged to be engaged by said
ratchets, as and for the purpose set forth
54 In an elevator, a hoisting motor, circuits therefor, a main switch, a shaft
arranged to control said main switch, latchets having teeth presenting in oppo-

page_text: site directions and operating in unison with the rotary movements of said shaft,
a reversing switch carrving pawls respectively arranged to engage the teeth
of said ratchets, whereby when said shaft is rocked in one direction one of said
pawls 18 engaged to shift the reversing switch in one direction, and when said
shaft 18 rocked in the other direction the other of said pawls is engaged to shift
the reversing switch in the opposite direction, as and for the purpose set forth.
55. In an elevator, a hoisting motor, circuits therefor, a main switch, a shaft
arranged to control said main switch, ratchets having teeth presenting in oppo-
site directions and operating in unison with the rotary movements of said shaft,
a reversing switch carrying pawla respectively arranged to engage the teeth
of said ratchets, whereby when said shaft is 1ocked in one direction one of said
pawls 18 engaged to shift the reversing switch in one direction and when said
shaft is rocked in the other direction the other of said pawls is engaged to
shift the reversing switch in the opposite duection, and means whereby when
the reversing switch arrives at the limit of its movement in either direction
the operating pawl is disengaged, thereby permitting the shaft to continue to
rotate in the same direction, as and for the purpose set forth
56. In an elevator, a hoisting motor, circuits therefor, a main switch, means
for controlling said main switch from any landing at which the car 18 to stop,
and means for locking said controlling mechanism when any one of the elevator
shaft or well doo18 18 in open position, as and for the purpose set forth
57. In an elevator, a hoisting motor, cucuits therefoi, means for controlling
the operation of said motor, a gear arranged at each landing at which the car
is to stop, each of said gears adapted to actuate said motor-controlling means,
and a lock for each gear, said locks arranged to be released only when the adja-
cent elevator shaft or well door is closed, as and for the purpose set forth
58 In an elevator, a hoisting motor, encuits therefor, means for controlling
said circuits, a sprocket chain arranged to extend throughout the elevator shaft
or well, a sprocket gear arranged at each landing on floor at which the car is
to stop, all of aand gears being simultaneously engaged by said sprocket chain,
whereby when any one of said gears is actuated said motor cueuit controlling
mechanism 18 operated, a lock for each of said gears, and means operated by
the closing of the elevator shaft or well door for disengaging said locks, as and
for the purpose set forth.
59. In an elevator, a hoisting motor, a controller therefor, means for actuating
said controller arranged at each landing or floor at which the cai 18 to stop, said
means including a rock shaft, and a dial associated therewith, connections
whereby all of said dials operate in unison, and a lock for each dial, said lock
arranged to be engaged or released according as the adjacent door of the shaft
or well is opened or closed, as and for the purpose set forth.
Dated this 18th day of October, 1899.
HAROLD ROWNTREE,
Haseltine, Lake & Co.,
45, Southampton Buildings, London, W C.,
Agents for the Applicant