Improvements in and relating to Electric Lifts or Elevators.
Year: 1899

page_text: Date of Application, 30th Dec., 1899-Accepted, 24th Mar., 1900
COMPLETE SPECIFICATION.
Improvements in and relating to Electric Lifts or Elevators.
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 electric elevators.
:
The object of the invention is to provide a push-button control system for
elevators, whereby the movement of the car may be effected and controlled from
any landing, or from the car, by means of push-buttons.
A further object of the invention is to provide means, of simple construction
and arrangement, whereby, by merely manipulating an ordinary push-button at
any landing, the car-hoisting mechanism will be set in motion to move the car,
and will be arrested automatically only when the car reaches the particular floor
at which the push-button was manipulated.
A further object of the invention is to provide a control system wherein by
manipulating any one of a series of ordinary push-buttons arranged on the car.
and corresponding to the various landings at which the car stops, the hoisting
mechanism will be put in action to move the car, and will be arrested only when
the car reaches the particular floor corresponding to the particular push-button
which has been manipulated.
A further object of the invention is the provision of means, in a push-button
control system, whereby the hoisting mechanism is rendered inoperative when-
ever a shaft or well door is open at any landing or floor.
A further object of the invention is the provision of means, in a push-button
control system, whereby when one push-button is manipulated, whether at any
landing or on the car, to cause the car to move to a particular landing or floor,
the operation or manipulation of any other push-button will be ineffective until
the cycle of operation set in motion by the manipulation of the first push-button
is completed.
Other objects of the invention will be more fully set forth hereinafter.
The invention consists substantially in the construction, combination, location
and arrangement, all as will be more fully hereinafter set forth, as shown in
the accompanying drawings, and finally pointed out in the appended claims.
Referring to the accompanying drawings, and to the various views and reference
signs appearing thereon,-
Fig. 1, is a diagram showing the various motor and controlling circuits and
switches.
Fig. 2, is a similar view showing the arrangement of the push-button circuits
at the various landings and through the car.
Fig. 3. is a broken detail view showing a form of automatic switch for con-
trolling the various circuits.
Fig. 4, is a broken detail view in section on the line 4, 4, Fig. 3.
Fig. 5, is a broken detail view of a portion of the switch device shown in
& A

page_text: Fig. 6, is a detail view illustrating the co-operative relation of the main and
auxiliary switches.
Referring to the drawings, A, designates the car; B, B1, B2, the doors of the
elevator shaft or well at the various landings at which the car is to stop;
C, C1, C2, push-buttons, one located at each floor or landing; and D, D¹, D², push-
buttons on the car corresponding respectively to the push-button's C C¹, C. A
circuit closure switch or device E, E¹, E2, is arranged at each floor, to be opened
or closed by the opening or closing of the door at the same landing therewith.
The wall switch is indicated at W. Reference signs F, F1, F2, designate magnet
switches corresponding to the various floors or landings, and the circuits of which
are controlled by the respective and corresponding push-buttons on the car or
at the landings, as will be more fully explained hereinafter. B³, designates
a safety switch on the car, the purpose and function of which will be explained
more fully hereinafter; G, G¹, G², designate double switches for controlling
the main motor circuit, the double switch G2, controlling the main return circuit,
and being actuated when either one of the other two double switches are actuated,
and said switches G, G¹, both of which cannot be actuated at the same time,
determining the direction of the current through the motor, one of said switches
actuating the motor in one direction and the other actuating said
motor in the opposite direction. H, H³, are solenoids for actuating
the switches G, G¹, respectively; J, is the motor armature; J¹, the motor field;
J2, the commutator; J³, is a brake solenoid; J4, is an automatic electric switch
operated by the current passing through the switch solenoids, and in turn con-
trolling the circuit of a controlling device through which the motor field and
armature currents are controlled. This controlling device consists of a rheo-
stat J5, through which the motor armature current is increased or decreased,
and a rheostat J6, through which the motor field current is increased or decreased,
these rheostats being so relatively arranged that when the motor armature
current is increased the field current is decreased, and when the arinature
current is decreased the field current is increased, thus effecting a speed regula-
tion of the motor. The rheostats J5, J, are controlled by an arm J, and dash-
pot J, the said arm being operated by a solenoid Jo, against the tension of a
spring Jo, the circuits of the said solenoid Jo, being controlled, as above
explained, by the automatic electric switch device J. Each of the magnet
switches F, F1, F2, consists of a magnet F4, F10, F11, and an armature lever F5,
each armature lever playing between a pair of contacts F6, F", and also arranged
to make contact with a contact point F8. The action of the several magnets
F, F, F, upon their respective armature levers F5, being opposed by a
spring F. The circuits of the solenoids H, H', are controlled by means of a
switch device, indicated generally by reference sign K. This comprises a
shaft K¹, suitably journaled and driven from the hoisting drum shaft K², or
other suitable or convenient rotating part of the apparatus, in any suitable
manner, as for instance through a worm K³, shaft K, and driving sprocket K³.
The rotation thus imparted through worm K³, effects a partial rotation of an
insulation disk K, and a cam wheel or track K. Upon the insulation disk are
mounted contact strips or segments. These segments or strips are arranged in
two separated sets, one set consisting of a long strip a, and a short strip a¹, and
the other set consisting of a long strip b, and a short strip b', the two sets of
strips being separated from each other. Supported upon a lever K8, is a con-
tact K, arranged to co-operate with the contact strips a, a, b, b. The lever K³,
is pivotally supported at one end and at the other end is supported in position
for the contact K, to make electrical connection with the strips carried by
disk K6, by means of a projection K, arranged to rest upon the edge of cam
disk K7. At a suitable point the periphery of said disk K', is recessed as
at K", and when the projection K10, reaches recess K", the supporting end of
the lever K8, will be lowered by said projection dropping into said recess, thereby
breaking circuit between the strips or segments and the contact K³. In order

page_text: to enable the projection K, to again ride up upon the periphery of the cam
disk, I provide the inclined ways K2, on each side of the recess K", said ways
being covered by pivoted track sections K", in a well known manner.
Upon shaft h', is supported a disk L, of insulating material, upon which
are mounted the binding posts or other suitable contact or circuit-completing
means indicated at 1, e¹, 2, 22, through which the circuits are completed from
the strips or segments a, a, b¹, b.
It will be understood that the periphery of cam disk K7, is provided with
only one recess K", and this recess is arranged opposite or adjacent to the space
between the ends of the strips a¹, and b, and hence whenever the car arrives
at its predetermined stopping point the recess K", will be opposite the pin or
projection K, on lever K³, corresponding to that floor at which the car is to
stop, and said disks K, and K', rotate in one direction or the other according
as the car ascends or descends. It will also be understood, and will be more
fully explained hereinafter,. that as the car approaches its stopping point the
contact-carrying disk K, will move so as to carry strip b, or a, as the case may be,
out of contact with the operative contact K, and to bring strip a¹, or b¹, as the
case may be, into contact therewith.
The specific mechanical construction of many of the parts above referred to
is of no particular consequence so far as the present invention is concerned,
and hence are not shown herein except diagrammatically to illustrate the
electrical action of my push-button system, which forms the essential feature of
my present invention.
I will now describe the electrical action of the several devices above referred
to, and their mutual and co-operative action and relation.
Suppose the parts to be in the relative positions shown, and the push-
button C, to be manipulated. Thereupon the following circuit will be com-
pleted From the main supply wire a², through wall switch W, wire a³, to a
point ; thence through wire c, to contact point e¹; thence to contact point,
these contacts being bridged as will be presently explained; thence through
wire 3, to push-button C. to wire e, wire a8, (see Fig. 1), magnet 14, wire a³,
wire thence (referring again to the diagram Fig. 2) through contact
device E, which ends the circuit at that point in case the door B, is open.
If the door B, is closed, the circuit continues from contact device E, through
wire to contact device E¹; and in case the door B₁, is closed, on through
wire, through the safety switch B³, on the car; thence the circuit a¹º, continues
through contact device E2, in case the door B2, is closed, and on through
wire (see Fig. 1) to the wall switch W, and to the main return wire b².
If desired, a lamp or other suitable device, indicated at B4, may be arranged in
this circuit, to reduce the current flowing therethrough. It will be noted that
the current as above traced leads through all the contact devices E, E', E³,
throughout the system, and also through the safety switch 133, on the car. There-
fore, if any door of the system be open, or if the safety switch on the car be
open. no current can flow through this circuit. Commencing at point at, a
shunt circuit is established therefrom through wire a³, post a, lever 1, point F7,
wire, to the post F8, of magnet switch F, through its lever F, contact F7,
wire 2, to post F8, of magnet switch Fits lever F5, to post F7. The purpose
and function of this shunt circuit will be explained more fully hereinafter.
The points c', and e, are bridged by means of an auxiliary switch when the
main switch device G2, is open. (See Fig. 6.)
From the foregoing it will be seen that pushing the button C, will close a
circuit including magnet F4, of magnet switch F, thereby effecting an energiza-
tion of said magnet.
Now, suppose instead of pushing button C, the button D, on the car is pushed.
Thereupon the following circuit is established: From main or wall switch W,
to wire, (Figs. 1 & 2), as above described, wire, (Fig. 2), push-button D),
wire ‹, wire e³, and thence on as above described through wire a³, (Fig. 1),

page_text: magnet F, wire a10, through all the door switches E, E', E2, the safety switch B³,
on the car, wire all to the main return wire 62. Thus it will be seen that whether
push-button C, at the landing is manipulated, or the push-button D, on the
car, corresponding thereto, the magnet switch F', will be actuated.
Similarly, suppose the push-button C2, to be manipulated. Thereupon the
following circuit will be closed. From main wall switch W, (Fig. 1), as above
explained, to wire ³, (see Fig. 2), through push-button C, wire, wires,
magnet F, wire c, wire a¹0, and on as before through the door switches E, E', E,
the safety car switch B3, and return through wire a, to wall switch W. If
instead of push-button C², suppose the corresponding push-button D2, on the
car, to be manipulated. Thereupon the following circuit will be established:
From the wall switch to wire 3, wire 5, push-button D³, on the car, wire c,
to wire c', and thence on as before described, through wire 8, magnet F, to
wire a, and thence, after passing through the door switch and the safety switch
on the car, to the main return wire 62, as before described.
In the same manner the circuits controlled by any other floor or landing
push-button, or its corresponding car button, can be traced, and it will be found
that when any floor button or its corresponding car button is manipulated, a
circuit is completed which. includes the corresponding magnet switch F, F, F².
The energization of magnet F, causes the armature lever 1, to rock into
contact with point F6, thereby completing the shunt circuit from the wall
switch, and which includes wire a, to said point F6, through wire d, to contact:
point d. Similarly the rocking of the armature lever F³, of any other magnet
switch closes a circuit to one or the other of the contact points d², ³, as the
case may be, the contacts points F6, being respectively connected to said con-
tacts , d, through wires 4, d. Thus, whenever any one of the floor or landing
push-buttons, or the corresponding car push-button, is manipulated, the corre-
sponding magnet switch FF1, F2, is actuated to complete a circuit to one or
the other of the contact points 1, 2, or d³. The contact points d', d, d³, are
co-operatively arranged to be placed in communication with the contacts a, a¹,
b, 6. In Fig. 4 is shown a construction for completing the communication
between contact d', and strip b. It will be observed that as many points d', d², dª³,
are employed as there are floors or landings for the car. One set of contact
strips a, a, or b, 61, are employed for the up movement of the car, and the
other set are employed for the down movement of the car.
I will now trace the circuit from point d', reference being had to Figs. 1 and 4,
it being understood that a similar arrangement is employed in connection with
each of the other contacts, . Supposing the lever K³, is in position to.
contact with strip b, then the circuit is completed from point d, through
point K, strip b, wire h, point h¹, wire, electric switch device J, wire ³, the
coils of solenoid H, wire e³, wire e, to the wall switch W. The completion of
this circuit energizes the solenoid H, and hence causes the closing of main
motor switch G, and also the switch G2. The closing of these switches completes
the, circuit through the motor field; also a circuit which includes the auxiliary
shunt field windings, and also the motor armature circuits. These various
circuits will now be traced.
From the wall switch W, through wire a³, point at, switch arm f, wire e³, to
rheostat arm J. At this point the current divides, one part passing through
wire e solenoid Jo, wire e, points es, and e, these points being bridged by the
actuation of the automatic switch J4, to wire elo, arm f' of switch G2, and wire el,
to the wall switch W. Another portion of the current passes through arm J7,
rheostat J, wire e¹ the field windings e13, wire el, brake solenoid ³,
wire e15, to arm f, and thence to the wall
third portion passes
switch W. And the
from arm J7, rheostat J5, wire el, point
wire g point g², arm f2, wire g³, commutator J², armature J, wire g, point g³,
wire g, point g, arm f³, point .98, wire, field winding go, wire ", fieid
winding g, to wire e, and thence on to the wall switch W, as before explained.
gr

page_text: The completion of these circuits starts up the motor and moves the car in the
desired direction. The energization of the solenoid J, by the completion of
the circuit therethrough as above explained, causes arm J7, to rock against the
action of spring J, thereby causing said arm to move over the rheostats J³, J6.
The result of this is to gradually increase the current passing through the motor
armature, and to correspondingly decrease the current passing through the
field, thus attaining an increasing speed of travel of the car.
The starting up
of the motor also sets in rotation the insulation disk K, carrying the contact
segments a, a, b, b, and in a direction corresponding to the direction of travel
of the car as determined by the position of the car when the push-button is
manipulated. The rotative movement of this disk causes the contact point d',
to be eventually brought into contact with strip b. This occurs when the car
approaches the landing at which it is to stop. When this contact is made, the
circuit through strip b, wire h, and on as above described, is broken, and the
following circuit is completed: From point d, to strip b, wire e, point el, wire e²,
solenoid H, and on to the wall switch, as above described. The completion of
this circuit and the breaking of circuit between point, and strip b, cuts the
switch J, out of circuit, thereby breaking the circuit of solenoid J, thereby
causing the rheostat arm J, to return to its normal or retracted position, which
movement of said arm controlling the rheostats J, Jo, decreases the armature
current and increases the field current, thereby slowing down the car, and when
the car arrives at the desired landing or stopping point, the projection K", of
lever K8 will attain that point of the periphery of cam disk K, at which is
located the recess K", and the said projection will drop into said recess, thereby
breaking the circuit between point, and the strip or segment, thereby
causing the motor switches G, G, to return to their normal positions, thereby
breaking the motor circuits and arresting the motor.
:
It will be understood that the recess K", in the periphery of cam disk K',
arrives opposite anyone of the levers K8, when the car is opposite the corre-
sponding floor, and that said recess is so relatively arranged that when the
projection K0, of one lever drops into said recess, that is, when the car is at
one stopping place, the other levers K8, are held up to cause their contact
points K; to contact with their co-operating segments or strips a, a, b, b', as
the case may be, so that the apparatus is in condition to be again set in motion
when another push-button at some other floor, or a corresponding button on
the car, is manipulated. It will be observed, however, that only two switch-
actuating solenoids H, H', are employed, one effecting an actuation of switches G,
and G2, and the other effecting an actuation of switches G¹, and G2, the switch G2,
being actuated coincidently with the actuation of either switches G, or G¹.
Now, suppose the push-button C³, or its corresponding car button D, to be
manipulated. The corresponding magnet switch 12, will be thereby caused to
operate as above explained, thus completing the circuit of solenoid H', when
the relative position of contact device K, is that shown in the drawing, and
hence actuating switches G, G². The actuation of these switches effects a
reversal of the current through the motor armature, thereby causing the car to
move in the opposite direction to that above described. In other respects the
operation is the same as that above described, the car starting up and having
its speed accelerated until it approaches the particular predetermined landing at
which it is to stop, and then the motor is automatically slowed down, and the
motor circuit is finally broken when the car reaches its stopping point.
It is above explained that when neither of the switches G, G¹, are snapped
in, that is, when they are in their normal retracted position, an auxiliary switch,
actuated thereby, operates to close the circuit between points c¹, c, which are
included in the circuit of all the landing push-buttons throughout the system.
When, however, either of the switches G, G¹, is actuated thereby, in either case,
as explained, actuating switch G2, this circuit is broken between the points c¹².

page_text: (see Fig. 6), and as the circuit of the various magnet switches are completed
through these points by breaking this circuit between points c¹, 2, the particular
magnet switch which is actuated by pushing a button would be broken, thereby
breaking the circuit which controls the motor switch actuating solenoids II, H
To avoid this, I arrange another circuit adapted to be closed through contact
points c, and k, when the switch G2, is actuated, by means of said auxiliary
switch. This completes the following circuit: From main wall switch W,
through wire a point, wire c, point c', point k, wire k¹, post 18, and since,
under the previous conditions as above explained, the magnet switch has been
actuated by the manipulation of a push-button, the lever F5, has been rocked
to cause point m, which is insulated from lever F, to contact with said post F8,
and hence said auxiliary circuit is completed from said lever through wire a,
wire as, and on through magnet F, as above explained. The several posts F8,
are in electrical connection with each other, and hence whichever magnet switch
has been operated will remain in the operative relation in which it is put when a
push-button has been manipulated, notwithstanding the fact that the push-button
circuits have been broken and all the push-buttons are inoperative. The
practical and advantageous effect of this arrangement is to prevent any action
taking place when any other push-button is manipulated while the car is in
motion through the manipulation of a particular button.
From the foregoing description it will be seen that a push-button is arranged
at each landing and a push-button is arranged on the car to correspond to each
floor. Each floor push-button and its corresponding car button controls a
circuit which includes a magnet switch. Each magnet switch controls a circuit
which includes one or the other of two solenoids. Each solenoid circuit includes
a contact-making arrangement adapted to be broken automatically when the
car has reached the particular floor corresponding to the button which has been
manipulated, and also adapted to automatically effect a slowing down of the
motor as the car approaches the landing at which it is to stop. Each solenoid
actuates sets of switches through which the motor circuits are controlled. It
will also be seen that the push-button circuits are all inoperative if any shaft
or well door is open, and that all the push-buttons are inoperative when the
car is in motion.
I have referred to the fact that both sets of switches G, G¹, cannot be actuated
at the same time. It will be observed that two solenoids H, H¹, are employed
for actuating these switches, the solenoid H, actuating switch G, and the sole-
noid H, actuating switch G¹. Now, in order that both switches G, G¹, may not
be actuated at the same time, I provide means whereby it is impossible to
simultaneously energize the coils of both solenoids H, H. This is the special
function and purpose of the shunt circuit, which includes wire a³. By tracing
this circuit it will be seen to extend to post F8, lever F3, point 17, wire a20, post F³,
of magnet switch F¹, its lever F, point F7, wire a², post 8, of magnet switch F2,
its lever, point 1, that is, supposing that all the magnet switches are
inoperative or out of action. Now, the circuits for energizing the solenoids H, H¹,
are completed by actuating a magnet switch so that a lever 15, may contact with
point F, the several points F6, being wired to points , d, 3, as shown. Now,
suppose magnet switch F to be actuated, thereby rocking lever F5, to complete a
solenoid circuit to d, the rocking of said lever effects a break in the circuit
above traced which includes point 17, and the levers F5, of the other magnet
switches. Therefore, only that solenoid H, or H, which is fed or energized
through the circuit which includes point d', will be energized, all the other sole-
noid circuits being automatically cut out or broken by the actuation of one
motor magnet lever.
From the foregoing description it will be seen that I provide a simple and
efficient push-button system for controlling the movements of the car, as to
destination, from any landing or from the car.

page_text: Having now particularly ascertained the object and nature of my invention,
and the manner in which the same is to be performed, I declare that what I
claim is:
1. In an electric elevator, a hoisting motor, circuits therefor, means for con-
trolling said circuits, and a series of push-buttons, one arranged at each floor or
landing, for completing the circuit of said circuit-controlling means, as and for
the purpose set forth.
2. In an electric elevator, a hoisting motor, circuits therefor, a switch arranged
in said circuit, means for actuating said switch, circuits for said switch, actuating
means, and a push-button arranged at each landing for completing the circuit
of said switch-actuating means, as and for the purpose set forth.
3. In an electric elevator, a hoisting motor, circuits therefor, a switch for con-
trolling said circuits, means for actuating said switch, circuits for said switch-
actuating means, said circuits including a push-button located at each landing
or floor at which the car is to stop, and circuit closure devices also arranged in
said circuits and adapted to be opened and closed by the opening and closing of
the elevator shaft or well doors, as and for the purpose set forth.
4. In an electric elevator, a hoisting motor, circuits therefor, means for con-
trolling said motor circuits, means for actuating said controlling means, circuits
for said actuating means, said circuits including push-buttons arranged on the
car and corresponding to the various floors at which the car is to stop, as and
for the purpose set forth.
5. In an electric elevator, a hoisting motor, circuits therefor, means for con-
trolling said circuits, actuating devices for said controlling means, circuits for
said actuating devices, and push-buttons arranged at each landing, and corre-
sponding push-buttons also arranged on the car, for controlling the circuit of
said actuating devices, as and for the purpose set forth.
6. In an electric elevator, a hoisting motor, circuits therefor, means for con-
trolling said circuits, actuating devices for said controlling means, circuits for
said actuating devices, a push-button arranged at each landing, and correspond-
ing push-buttons on the car, for controlling the circuit of said actuating devices,
and closure devices arranged in the circuit of said push-buttons, to be opened
and closed by the shaft or well doors, as and for the purpose set forth.
7. In an electric elevator, a hoisting motor, circuits therefor, means for con-
trolling said circuits, a magnet switch for controlling said circuit-controlling
means, and a push-button arranged on the car for controlling the circuit of said
magnet switch, as and for the purpose set forth.
8. In an electric elevator, a hoisting motor, circuits therefor, means for con-
trolling said circuits, a series of magnet switches corresponding in number to
the various landings at which the car is to stop, and each adapted when actuated
to operate said circuit-controlling means, and a push-button arranged at each
landing for controlling the circuit of its corresponding magnet switch, as and
for the purpose set forth.
9. In an electric elevator, a hoisting motor, circuits therefor, a series of magnet
switches corresponding to the various landings at which the car is to stop, and
each adapted when actuated to effect the control of the hoisting motor circuits,
and a push-button arranged at each landing for controlling the circuit of its
corresponding magnet switch, as and for the purpose set forth.
10. In an electric elevator, a hoisting motor, a series of magnet switches
corresponding to the various landings at which the car is to stop, each adapted
when actuated to effect the control of the hoisting motor circuits, and a series of
push-buttons on the car corresponding to the various magnet switches, for con-
trolling the circuits of said magnet switches, as and for the purpose set forth.
11. In an electric elevator, a hoisting motor, a series of magnet switches
corresponding to the various landings at which the car is to stop, each adapted
when actuated to effect the control of the hoisting motor circuits, a circuit for

page_text: each magnet switch, each circuit including a push-button at the landing corre-
sponding to said magnet switch, as and for the purpose set forth.
12. In an electric elevator, a hoisting motor, a series of magnet switches
corresponding to the various landings at which the car is to stop, and each
adapted when actuated to effect the control of the hoisting motor circuits, a
circuit for each magnet switch, each of said circuits including a push-button
arranged at the landing corresponding to its own magnet switch, and a closure
device arranged in said magnet switch circuits at each landing, to be controlled
by the opening and closing of the elevator shaft or well door, as and for the
purpose set forth.
13. In an electric elevator, a hoisting motor, a series of magnet switches
corresponding to the various landings at which the car is to stop, and each
adapted when actuated to effect the control of the hoisting motor circuits, a
circuit for each magnet switch, each circuit including a push-button on the car
and a push-button at the particular landing corresponding to said magnet switch,
as and for the purpose set forth.
14. In an electric elevator, a hoisting motor, a magnet switch for effecting
the control of the circuit of said motor, a circuit for said magnet switch including
a push-button, and means actuated coincidently with the actuation of the motor
for breaking said push-button circuit, as and for the purpose set forth.
15. In an electric elevator, a hoisting motor, a switch for controlling the
circuits of said motor, electrical devices for actuating said switch, means arranged
at each landing for completing the circuit of said electrical devices, and means
actuated by the operation of said switch for breaking said landing circuits, as
and for the purpose set forth.
16. In an electric elevator, a hoisting motor, a switch for controlling the
circuits of said motor, electrical devices for actuating said switch, magnet
switches for controlling the circuits of said electrical devices, said magnet switches
corresponding in number to the various landings at which the car is to stop, and
a push-button arranged at each landing for completing the circuit of its corre-
sponding magnet switch, as and for the purpose set forth.
17. In an electric elevator, a hoisting motor, a switch for controlling the
circuits of said motor, electrical devices for actuating said switch, magnet
switches corresponding in number to the various landings at which the car is
to stop, for controlling the circuits of said electrical devices, a push-button
arranged at each landing for completing the circuit of its corresponding magnet
switch, and means actuated by said motor switch for breaking said push-button
circuits, as and for the purpose set forth.
18. In an electric elevator, a hoisting motor, a switch for controlling the
circuits of said motor, electrical devices for actuating said switch, a magnet
switch, corresponding to each landing at which the car is to stop, for controlling
the circuit of said electrical devices, a circuit for each magnet switch, each
magnet switch circuit including a push-button on the car and a push-button at
the floor or landing corresponding to said magnet switch, and means actuated
by said motor switch for making or breaking all of said push-button circuits,
as and for the purpose set forth.
19. In an electric elevator, a hoisting motor, a switch for controlling the
circuits of said motor, electrical devices for actuating said switch, a series of
magnet switches, controllable from the respective landings at which the car is
to stop, for controlling the circuits of said electrical devices, and means arranged
in the circuits of said electrical devices for breaking said circuits when the car
arrives at the floor or landing corresponding to the magnet switch which is
operated, as and for the purpose set forth.
20. In an electric elevator, a hoisting motor, a switch for controlling the
circuits of said motor, electrical devices for actuating said switch, circuits for
said electrical devices including movable contacts, actuated coincidently with
the travel of the car, and adapted to break said circuits when the car arrives at

page_text: its predetermined stopping place, and devices controllable from the respective
landings at which the car is to stop, for completing said circuits to said movable
contacts, as and for the purpose set forth.
21. In an electric elevator, a hoisting motor, a switch for controlling the
circuits of said motor, electrical devices for actuating said switchi, circuits for
said electrical devices, magnet switches controllable from the respective landings
at which the car is to stop, for completing the circuits of said electrical devices,
and means arranged in said circuits and actuated by the hoisting motor for
automatically breaking said circuits when the car arrives at the particular landing
at which it is to stop, as and for the purpose set forth.
22. In an electric elevator, a hoisting motor, a switch for controlling said
motor, electrical devices for actuating said switch, circuits for said electrical
devices including an automatic contact device, magnet switches controllable
from the respective floors or landings at which the car is to stop for completing
the circuit of said electrical devices to said automatic contact device, and means
actuated by said motor for operating said contact device, as and for the purpose
set forth.
23. In an electric elevator, a hoisting motor, and means for controlling said
motor, including a series of magnet switches corresponding to the various landings
at which the car is to stop, each adapted to be controlled from its corresponding
landing, and means whereby when one magnet switch is actuated the other
magnet switches are rendered inoperative, as and for the purpose set forth.
24. In an electric elevator, a hoisting motor, and means for controlling said
motor, including a series of magnet switches, a circuit for each magnet switch,
each of said circuits including a push-button on the car and a push-button at
the corresponding landing, and means whereby when one magnet switch is
operated the others are rendered inoperative until the cycle of operation set in
motion by the magnet switch has been completed, as and for the purpose set
forth.
25. In an electric elevator, a hoisting motor, means for controlling the circuits
of said motor, including a series of magnet switches, a circuit for each magnet
switch, each circuit including a push-button on the car and a push-button at
the corresponding landing at which the car is to stop, an auxiliary energizing
circuit for said magnet switches, and means actuated coincidently with the
completion of the motor circuit for breaking said push-button circuit and com-
pleting said auxiliary energizing circuit, as and for the purpose set forth.
26. In an electric elevator, a hoisting motor, a switch for completing the
circuit of said motor, an auxiliary switch actuated by said motor switch, means
for controlling said motor switch, including a series of magnet switches corre-
sponding to the various landings at which the car is to stop, a circuit for each
magnet switch, including a push-button on the car and a push-button at the
corresponding landing, an auxiliary energizing circuit for said magnet switches,
said auxiliary switch adapted to control the push-button and auxiliary circuits
of said magnet switches, as and for the purpose set forth.
27. In an electric elevator, a hoisting motor. means for controlling the circuits
of said motor, including a series of magnet switches, a circuit for each magnet
switch, each circuit including a push-button, an auxiliary energizing circuit
for said magnet switches, said auxiliary energizing circuit including a closure
device at each landing. adapted to be opened and closed by the opening and.
closing of the shaft or well door at that landing, and means actuated coincidently
with the completion of the motor circuit, for breaking said push-button circuit
and completing said auxiliary energizing circuit, as and for the purpose set forth.
28. In an electric elevator, a hoisting motor, a circuit therefor, make and
break and direction-controlling switches for said circuit. said make and break
switch adapted to be actuated when any one of the direction-controlling switches
is actuated, and means for controlling said switches from any landing or from
the car, as and for the purpose set forth.

page_text: 29. In an electric elevator, a hoisting motor, a circuit therefor, a make and
break and direction-controlling switches for said circuit, said make and break
switch adapted to be actuated when any one of the direction-controlling switches
is actuated, electrical devices for controlling said switches, circuits for said
electrical devices, including a push-button on the car and a push-button at each
floor or landing, as and for the purpose set forth.
30. In an electric elevator, a hoisting motor, a circuit therefor, a make and
break and direction-controlling switches for said circuit, means whereby when
either one of said direction-controlling switches is actuated said make and
break switch is also actuated, a solenoid for actuating each direction-controlling
switch, a circuit for each solenoid, and means arranged at each landing for
controlling the circuits of said solenoids, as and for the purpose set forth.
31. In an electric elevator, a hoisting motor, a circuit therefor, a make and
break and direction-controlling switches for said circuit, a solenoid for operating
each direction-controlling switch, and means for preventing the simultaneous
energization of both solenoids, as and for the purpose set forth.
32. In an electric elevator, a hoisting motor, a circuit therefor, a make and
break and direction-controlling switches for said circuit, a solenoid for operating
each direction-controlling switch, means for controlling the circuits of said sole-
noids from each landing or from the car, as and for the purpose set forth.
33. In an electric elevator, a hoisting motor, a circuit therefor, a make and
break and direction-controlling switches, a solenoid for operating each direction-
controlling switch, circuits for said solenoids, controlling devices for said circuits,
including a magnet switch, a circuit for said magnet switch, said circuit including
a push-button, as and for the purpose set forth.
34. In an electric elevator, a hoisting motor, a circuit therefor, a make and
break and direction-controlling switches for said circuit, a solenoid for operating
each direction-controlling switch, means for controlling said solenoids, including
a series of magnet switches corresponding to the various landings at which the
car is to stop, and a push-button arranged at each landing for controlling the
corresponding magnet switch, as and for the purpose set forth.
35. In an electric elevator, a hoisting motor, circuits therefor, a series of
magnet switches, a push-button arranged at each landing, and a corresponding
push-button on the car, cach push-button adapted to control the circuit of a
magnet switch, circuits controlled by said magnet switches, means arranged in
said circuits for controlling the motor circuits, and means also arranged in said
circuits for causing the arrest of the motor when the car reaches any pre-
determined landing, as and for the purpose set forth.
36. In an electric elevator, a hoisting motor, a series of magnet switches, a
push-button arranged at each landing, and a corresponding push-button arranged
on the car, each push-button adapted when manipulated to close the circuit of a
magnet switch, circuits controlled by said magnet switches, means arranged in
said circuits for controlling the main motor circuits, and means also arranged in
said circuits for causing the motor to slow down as the car approaches any
predetermined floor, as and for the purpose set forth.
37. In an electric elevator, a hoisting motor, a series of magnet switches, a
push-button arranged at each landing and a corresponding push-button arranged
on the car, each push-button adapted when manipulated to close the circuit of a
magnet switch, circuits controlled by said magnet switches, means arranged in
said circuits for controlling the main motor circuits, and means also arranged in
said circuits, and operated by the motor, for automatically breaking said circuits
when the car reaches a particular predetermined landing, as and for the purpose
set forth.
38. In an electric elevator, a hoisting motor, a series of magnet switches, a
push-button arranged at each landing, and a corresponding push-button arranged
on the car, each push-button adapted when manipulated to close the circuit of a

page_text: magnet switch, a control circuit adapted to be closed when a magnet switch is
operated, an automatic switch arranged in said control circuit, and devices
controlled by said control circuit for varying the speed of the motor, as and for
the purpose set forth.
39. In an electric elevator, a hoisting motor, a rheostat for varying the speed
of said motor, devices for actuating said rheostat, a circuit for said devices,
means actuated by the motor for breaking said circuit as the car approaches
any particular predetermined floor, and a push-button arranged at each Hoor for
controlling the motor circuit, as and for the purpose set forth.
40. In an electric elevator, a hoisting motor, a rheostat for varying the speed
of said motor, a solenoid for actuating said rheostat, an automatic switch for
controlling the circuit of said solenoid, a circuit for said automatic switch, and
means actuated by the motor for breaking the circuit of said automatic switch as
the car approaches a particular predetermined landing, as and for the purpose
set forth.
41. In an electric elevator, a hoisting motor, a rheostat for varying the speed
of said motor, a solenoid for actuating said rheostat, an automatic switch for
controlling the circuit of said solenoid, a contact device arranged in the circuit
of said automatic switch for making and breaking said circuit, and means
controllable from the car and from each floor or landing for completing said
circuit to said contact device, as and for the purpose set forth.
42. In an electric elevator, a hoisting motor, a rheostat for varying the speed
of the motor, an automatic switch for controlling said rheostat, a contact device
arranged in the circuit of said automatic switch, and actuated by the motor, for
making and breaking said circuit, and means controllable from the car and from
cach landing for completing said circuit to said contact device, as and for the
purpose set forth.
43. In an electric elevator, a hoisting motor, a rheostat for varying the speed
of the motor, an automatic switch for controlling said rheostat, a contact device
arranged in the circuit of said automatic switch, and actuated by the motor,
for making and breaking said circuit, a series of magnet switches, each when
actuated adapted to complete an operating circuit to said contact device, and
means controllable from the car and from each landing for actuating said magnet
switches, as and for the purpose set forth.
44. In an electric elevator, a hoisting motor, a rheostat for varying the speed
of the motor, an automatic switch for controlling said rheostat a contact device
arranged in the circuit of said automatic switch, and actuated by the motor, for
making and breaking said circuit, a series of magnet switches corresponding to
the various landings at which the car is to stop, each when actuated adapted to
close an operating circuit to said contact device, a circuit for each magnet
switch, a push-button on the car, and a push-button at the corresponding landing,
for completing said motor magnet circuits, as and for the purpose set forth.
45. In an electric elevator, a hoisting motor, a field circuit, and an armature
circuit therefor, a rheostat for varying the current in said circuits, an automatic
switch for controlling the circuit of said rheostat, a contact device actuated by
the motor for making and breaking the circuit of said automatic switch, whereby
as the motor starts up its speed is accelerated, and as the car approaches its
predetermined stopping point its speed is decreased, and means controllable
from the various fandings for completing circuit to said contact device, as and
for the purpose set forth."
46. In an electric elevator, a hoisting motor, a switch device for controlling
the circuits of said motor, electrical devices for actuating said switch device, a
contact device arranged in the circuit of said electrical devices and adapted to
be actuated by the motor to make and break said circuit, a series of magnet
switches, each adapted to close a circuit to said contact device, a circuit for each
magnet switch, each magnet switch circuit including a push-button on the car

page_text: and a push-button at a floor or landing at which the car is to stop, as and for
the purpose set forth.
47. In an electric elevator; a hoisting motor, switches for controlling the
circuits of said motor, electrical devices for actuating said switches, a contact
device arranged in the circuit of said electrical devices, said contact device
including a disk carrying insulated segments or contact strips, co-operating
contacts corresponding to the various floors at which the car is to stop, means
actuated by the motor for rocking said disk, means controllable from each
floor and from the car for completing circuit to said contacts, and means for
breaking contact between said contacts and segments when the car reaches the
particular floor corresponding to the contact which is in commission, as and for
the purpose set forth.
48. In an electric elevator, a hoisting motor, switches for controlling the
circuits of said motor, electrical devices for actuating said switches, a contact
device arranged in the circuit of said electrical device, and including a disk
carrying contact segments, levers corresponding to the various floors at which
the car is to stop, and carrying co-operating contact points, means controllable
from the respective landings for completing circuit to said levers, and means
actuated by the motor for moving said levers to break the circuits controlled
thereby, as and for the purpose set forth.
49. In an electric elevator, a hoisting motor, circuits therefor, means for
controlling said circuits, a series of push-buttons, one arranged at each floor or
landing, for completing the circuit of said circuit-controlling means, and means
whereby when the motor starts up its speed is accelerated, and when the car
approaches its predetermined stopping point said motor is slowed down, as and
for the purpose set forth.
50. In an electric elevator, a hoisting motor, and means controllable from the
car for automatically reducing the speed of said motor as the car approaches
any predetermined stopping point, as and for the purpose set forth.
51. In an electric elevator, a hoisting motor, and means actuated thereby for
reducing the speed thereof as the car approaches any predetermined stopping
point, as and for the purpose set forth.
52. A motor, means for varying the speed thereof, said means operated by
said motor, as and for the purpose set forth.
53. In an electric elevator, a motor, means controllable from the car for
starting said motor, and means for arresting said motor when the car reaches a
predetermined stopping point, as and for the purpose set forth.
54. In an electric elevator, a motor, means controllable from any landing for
setting the motor in operation, and means actuated by the motor for arresting
the motor when the car reaches a predetermined stopping point, as and for the
purpose set forth.
55. In an electric elevator, a motor, means controllable from any landing for
setting said motor in operation, and means actuated by the motor for reducing
the speed of the motor as the car approaches any predetermined stopping point,
as and for the purpose set forth.
56. A motor, means for accelerating the speed of said motor as it starts up,
and means operated by the motor for automatically arresting the same at a
predetermined point, as and for the purpose set forth.
57. A motor, and means actuated by the motor for reducing the speed thereof
as it approaches a predetermined stopping point, as and for the purpose set forth.
58. In an electric elevator, a motor, circuits therefor, means for controlling
said circuits, a series of contacts, one arranged at each floor or landing. for
completing the circuit of said circuit-controlling means, and means whereby
when the motor is set in operation its speed is accelerated, as and for the purpose
set forth.
59. In an electric elevator, a motor, means for controlling the circuits of said

page_text: motor, a series of contacts, one arranged at each floor or landing, for completing
the circuit of said motor circuit controlling means, and means for reducing the
speed of the motor when the car approaches a predetermined stopping point,
as and for the purpose set forth.
HAROLD ROWNTREE.
Haseltine, Lake & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.