Improvements in Telemeter Systems, or Means or Apparatus for Indicating or Indicating and Recording Electrically at & Distance Motions of Rotatory Parts of Machinery.
Year: 1893

page_text: Date of Application, 17th Jan., 1893-Accepted, 17th Jan., 1894
COMPLETE SPECIFICATION.
Improvements in Telemeter Systems, or Means or Apparatus for
Indicating or Indicating and Recording Electrically at &
Distance Motions of Rotatory Parts of Machinery.
A communication from abroad by FERNANDO JASON DIBBLE, of Peabody, in the
State of Massachusetts, one of the United States of America.
I ALFRED GEORGE BROOKES of 55 and 56 Chancery Lane, in the County of
London, Chartered Patent Agent 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 telemeter systems or means or apparatus for indicating,
or indicating and recording, electrically at a distance the speed and direction of
movement of rotatory parts of machinery.
In another application filed by me concurrently with this, a system of this class
is shown wherein the changes in direction of rotation are indicated by the direction
of movement of an indicating pointer or device.
In this invention the changes in direction are indicated by a separate indicating
device or annunciator controlled by the polarity of the circuit; while the increase
and decrease of speed is shown by the direction of movement of the pointer
or device.
Fig. 1, represents in front elevation a transmitter forming a part of my improved
telemeter system.
Fig. 2, a rear side view of the same with the back swung open to expose the
mechanism responsive to changes in the speed and direction of rotation of
the shaft.
Fig. 3, a sectional view taken on the dotted line - Fig. 2.
Fig. 4, a face view of the transmitting magnets and co-operating mechanism
looking from the front of the transmitter, or from the back of Fig. 2.
Fig. 5, a section taken back of the base plate Fig. 3, on the dotted line y―y.
Fig. 6, a face view of the receiver, showing the receiving maguets and
co-operating mechanism.
Figs. 7, 8 and 9, details illustrating the annunciator actuated by changes in
polarity of the circuit.
Fig. 10, a diagram view illustrating the electrical connections of the system.
Referring to the drawings, Figs. 1 and 2, A represents a pulley in the present
instance fast on a shaft a, journaled in suitable bearings in the casing D of the
transmitter, caid pulley being belted or otherwise connected with a rotating shaft
the speed and direction of rotation of which it is desired to indicate and record, the
connections between said pulley and rotating shaft preferably being such that the
said pulley may be thrown out of gear and stopped at will, a mechanism for
accomplishing this being shown and described in the application referred to.
The shaft a, within the casing D of the transmitter is provided with a toothed
wheel, in mesh with a pinion i¹, on a counter shaft, said counter-shaft also
having fast upon it a toothed wheel 3, in mesh with and driving a pinion , on
dotted lines Fig. 3, fast on the governor shaft journaled in suitable bearings,
within the casing all as in the application referred to.
The governor shaft at one end has a fixed hub 6, to which are jointed at
diametrically opposite points, the links, carrying the governor balls *, and in
turn jointed to like links, jointed at their opposite ends to the sliding sleeve, a
spring or springs ito, interposed .between the fixed hub, and the sliding sleeve i³,

page_text: normally separating the same maintaining the toggle links 17, 18, together with the
governor balls *, normally in their innermost full line positions Fig. 2, the
construction of this portion of the mechanism being substantially the same as that
of any of the well known ball governors now in common use.
Rotation of the shaft a, causes the balls to move away from the axis of rotation
as the speed of rotation increases while a decrease of speed will permit the spring
or springs 10 to draw the balls toward the axis of rotation.
The sliding sleeve has a peripheral groove to receive the roll or other
stud, on the free end of an arm is fast on one end of the arbor, Fig. 3,
journaled in the back plate of the casing D of the transmitter, the said arbor at the
opposite or front side of said back plate carrying the contact arm e, see Fig. 5.
The contact arm e, normally lies between the two contact points or pins e', e², on
the outer ends of the arms e, e', which latter are insulated from each other and
carried by a carrier ex, shown by dotted lines Fig. and in Fig. 3. pivoted at its
upper end on an arbor e, journaled in suitable bearings in the face plate E of the
transmitter, see Fig. 3.
The insulated carrier ex, for the contacts e¹, e², is provided with a pin e, fitted
to move in the cam slot e', formed in the plate or disk e, fast on the inner end of a
staff, journaled in the face plate E, Fig. 3, and having at its outer front end a
toothed wheel e¹º, see Fig. 4, in mesh with a pinion e¹ on an arbor el which latter
carries the toothed driving wheel e¹³.
The contacts e¹, e³, are arranged in circuit respectively with the transmitting
magnets F, F, arranged as in Fig. 4, and having their main armatures f, f³,
attached to opposite ends of the armature carrier f³, pivoted at f³, in a suitable
frame carried by the face plate E, said carrier having attached to and movable
with it a pallet fx, shown mostly in dotted lines Fig. 4, the arms 6 and 7, of the
said pallet being arranged at opposite sides of the axis of the driving wheel e¹³,
and to co-operate with one or another of the V-shaped teeth thereon, vibrations
of the pallet in one or the other direction caused by attraction of one or the other
of the armatures f, f³, causing the said driving wheel to be rotated in one or the
other direction, a spring-controlled pawl f, by its wedge-shaped end co-operating
with the V-shaped teeth to assist in the rotation of the driving wheel and to retain
the latter in position.
The arms 6, 7, of the forked pallet f, are provided with pins 10, which
co-operate with the inclined or cam surfaces f", on a lever f12, pivoted at the
said lever when turned on its pivot, acting upon and moving a circuit breaking
arm, pivoted at f16, and normally having its free end in contact with a contact
spring, movement of the said lever f" by the lever 12, breaking the circuit
between it and the said contact spring.
Whenever the forked pallet 4, is vibrated whether it be in one or the other
direction, one or the other of the pins ƒ10, will act upon its cam surface to move
the lever to lift the circuit breaking lever f" to break the circuit between the
same and its contact spring f
Springs, shown principally by dotted lines Fig. 4, act in opposite directions
upon a pin pon the pallet fto centre the latter and return it to its normal
central position after each vibration. The electro-magnets F, F', are also provided
with auxiliary armatures h, l', carried by the arms of the U-shaped carrier h³,
pivoted at , and having its ends 26, 27, arranged to lie between and normally
out of contact with the fixed contacts ³, h, see Fig. 4.
When a current of electricity is caused to pass through either of the transmitting
magnets F, F1, by engagement of the contact arm e, with either of the contacts e', e²,
the auxiliary armature of the particular magnet energized being first attracted to
bring the end of its carrier into engagement with one or the other of the fixed
contacts ³, h, to shunt out the contact arm e, as will be fully hereinafter described,
the main armature of the magnet energized, being then attracted to cause rotation
of the driving wheel e¹³.
Referring again to Figs 2 and 3, the inner end of the shaft a, which is rotated

page_text: from the shaft the speed and direction of rotation of which it is desired to indicate
and record, has fast upon its end a disk or plate n, provided with a series of
circumferentially arranged projecting pins n³, which as the said disk is rotated, act
upon the lower depending end of a dog n, pivoted at n¹, on a spindle m, and
normally retained in its vertical position by a spring n³, the said spindle m, being
mounted and made longitudinally movable in a suitable bearing secured to the back
plate of the casing D, the said spindle at its front end carrying an insulated
block m preferably circular in cross section, see Fig. 10, and provided with two
circumferential contact rings m², m³, which co-operate with three spring-pens m³, m³
or me, the said contact rings when the block m¹ is in its extreme right-hand position
Fig. 3, contacting with the spring pens mo, m³, but when the said insulated block is
moved to its extreme left-hand position Fig. 3, said rings will contact with the
spring pens m, m².
The spindle m is moved longitudinally to effect this change of position of the
block m by the action of the pins n on the dog n, rotation of the disk which
carries the said pins in one or the other direction, causing the dog to be turned or
tipped on its pivot in one or the other direction according as the pins strike it upon
one or the other side and turn it in order to pass beneath.
The limit of vibration of the dog n, on its pivot is somewhat less than that
necessary to clear the pins and permit the latter to pass beneath it, so that by
reference to Fig. 3, if the shaft a, and disk n' are rotated in the direction of
arrow 25, the first pin n³ which strikes the depending end of the dog, will first
turn the same on its pivot to the limit of its movement and as such is not quite
sufficient to permit the pin to pass beneath it, it will carry the said dog and the
spindle m, to which it is pivoted, bodily to the right, until the pin clears the dog,
such movement of the spindle causing the insulated block m' to be moved to the
right Fig, 3, with its contact strips m², m³, in engagement with the contact
springs mo, m, the tipping movement of the dog n, being alone thereafter sufficient
to permit the pins n³, to pass freely beneath, as the shaft a is rotated.
will
Conversely, assuming the spindle to have been moved bodily to the right as
described, if the rotation of the shaft a be stopped, and it be rotated in an
opposite direction to that indicated by arrow 25, the first pin n³, which strikes
the depending dog from the opposite or right-hand side, will first tip the dog on
its pivot until it shall have reached the limit of its tipping movement, when
thereafter move the dog and the spindle to which it is pivoted, bodily to the left,
Fig. 3, until the dog clears the pins n³, such movement of the spindle causing the
insulated block m' to be moved to the left carrying its contact strips m², m³, beneath
and in engagement with the contact springs m³, m³.
The tipping movement of the dog n, when the latter has been moved into one
or the other of its extreme positions is sufficient to permit the pins n³, to pass freely
beneath it; but a change in direction of movement of the said pins must necessarily
move the dog bodily to its opposite extreme position before the tipping movement
of the same will permit the pins to pass beneath it.
The contact arm e, and the armature carriers f³, h, are electrically connected
with the base of the instrument, through their bearings, while the fixed
contacts, and movable contacts e¹, e, are insulated from the base of the
instrument, and referring to Fig. 10, the arrangement of circuits is as follows:
:-
The contacts e, e³, are connected respectively by wires 30, 31, with the fixed
contacts 3, 4, on and insulated from the base of the transmitter, said contacts
being in turn connected by wires 32, 33, with the transmitting magnets F, Fi
said magnets being respectively connected by line-wires 34, 35, with the receiving
magnets c, c', of the receiver represented in Fig. 6, which is of substantially the
same construction as the receiver shown and described in my application referred
to, to which reference may be had, like letters representing like parts, the said
magnets being connected by a common return wire 36, which is connected with the
contact strip or ring m³, on the insulated block m', of the transmitter, the insulated
ring m³, on the said block being connected by a wire 37, with the fixed spring

page_text: contact, the circuit breaking lever 1, being connected by wire 38 with the
contact arm e at its pivotal point.
The two outside spring contacts m', mo, of the transmitter are connected together
in circuit by a wire 39, both being connected with one pole of a battery or
generator G by a wire 40, the other pole of said generator being connected by
wire 41 with the middle spring pen m³.
Referring to Figs. 6 to 9 inclusive, S represents an electro-magnet which is
included in the common return line wire 36, the said magnet being of suitable or
usual construction to respond to changes in the direction of the current in which it
is placed.
I have, however, herein represented a particular construction which is well
adapted for this particular use, the projecting ends of the core s, of the magnet,
being supported between the legs s of an inverted U-shaped frame pieces, secured
to the back piece of the receiver, the said legs also having pivoted between them by
suitable pivot screws, an armature piece, to which are clamped by means of an
adjustable clamping plates, the two U-shaped permanent magnets, s, the ends
or poles of the magnets lying at opposite sides of the projecting ends of the core
of the magnet, so that according as the said magnet is energized by a current
of one or another direction will one or another of the permanent magnets, 7, be
attracted to its core and the other repelled therefrom to rock the armature pieces*,
on its pivots s, the said armature piece carrying by means of suitable rods 8, an
annunciator dial, on which are printed the words "Astern"". Ahead," one above
the other, or words of the same or desired purport, one of which, as the annunciator
is moved vertically by attraction of one or another of the permanent magnets 8, 7,
will be displayed behind a suitable slit or openings, in the dial plate of the
receiver.
The transmitter is also provided with a suitable annunciator t³, Figs. 3 and 4,
carrying words similar to those carried by the annunciator of the receiver, and
which is supported by two arms (2, on the rock shaft, journaled in suitable
posts t', standing out from the face plate E of the transmitter, one or another of the
characters on the annunciator being displayed behind the opening t, in the face
plate of the transmitter according as the said annunciator is moved into one or
another position by rotation of the rock-shaft.
The rock-shaft t, is actuated by the crank arm t, having a slot t to receive a
pin t, on the insulated block me which, as the said block is moved to the right or to
the left Fig. 3, to change the polarity of the line circuit, will rock the shaft t, and
move the annunciator t, into one or another position to display the characters
thereon behind the opening .
With the insulated block m² to be in the position represented in Fig. 10, the
operation of the system is as follows:-
Assuming the shaft, the speed and direction of rotation of which is to be
indicated and recorded, to be in rotation, and the pulley A connected with and
rotated thereby, the rotative movement communicated to the shaft a, will cause
the bulls of the governing device, Fig. 2, to be moved away from the axis
of the shaft by centrifugal action, as indicated by dotted lines, and to move
the sliding sleeve to the right a distance corresponding to the speed of
.rotation of the shaft, said sleeve being moved more or less according as the
balls are moved nearer to or farther away from the axis of rotation by the
speed of the shaft.
The sleeve as it is moved, acts through the arm 3 to rotate the arbor
and cause the contact arm e, on the outer end thereof to be moved to the left
Figs. 3, 5 and 10, into engagement with the contact pin e³, and close the circuit
through that contact and the electro-magnet. F1 of the transmitter, and through
the electro-magnet c of the receiver, the circuit being traced as follows, reference
being had to Fig. 10.
From the generator G, by wire 40, spring pen m², contact ring m³ on the
block m', wire 37, spring f1, circuit breaking lever f¹³, wire 38; contact arm e
१

page_text: contact e, its arm, wire 31, contact *, transmitting magnet F¹, line wire 35,
receiving magnet c¹ of the receiver, wire 38*, through the polarized magnet S, line
wire 36, contact ring m³ on the block m' of the transmitter, spring pen mo, and wire 41
to the opposite pole of the generator.
The magnet F of the transmitter being thus energized, will attract its auxiliary
armature, causing the arm 27 of its carrier to contact with the fixed contact 4,
to thus shunt out the contact arm e and contact e², and the imperfect engagement
between the same, the current then passing from the wire 38 through the pivotal
point of the contact arme through the base of the instrument to the auxiliary.
armature carrier 2, thence through its arm 27 to the contact h*, permitting a
strong current to flow through the transmitting magnet F¹, to attract its main
armature and move the pallet f1 to the left Fig. 4, causing its arm 7 to engage
one of the teeth on the driving wheel e¹s and move the latter one tooth in the
direction of the arrow, such movement of the driving wheel rotating the staff e³, in
an opposite direction, as indicated, to thereby rotate the indicating pointer.p
thereon one step to the right to indicate a certain speed.
As the pallet, is moved to rotate the driving wheel el, it will act through one
of the pins 10 to move the lever f" and lift the circuit breaking lever f1 to
break the circuit between it and its fixed spring f", permitting the main and
auxiliary armatures of the transmitting magnet F' to resume their normal
retracted positions, the arm 27 on the auxiliary armature carrier moving away
from its contact h*.
The receiving magnet c' of the receiver is energized at the same time as the
transmitting magnet F¹, said receiving magnet attracting its armature to move
the pallet co to the left Fig. 6, and thereby cause rotation of the indicating pointer
one notch to the right to indicate a certain speed.
Thus the indicating pointer of the receiver and of the transmitter are moved.
together one step.
As the staff e, of the transmitter is rotated to turn the pointer, the cam e³, on
the inner end thereof is rotated with it, acting through the cam slot e7, and the
pin e, to move the contact carrier ex to the left to move its contact pin eaway
from and out of engagement with the contact arm e.
The circuit having been broken by the circuit breaking lever f½, if the speed of
the shaft is such that the contact arm e, actuated by the movement of the governing
balls, is caused to follow the movement of the contact away from it, and still
maintain its engagement therewith, it will immediately close the circuit at that
point as soon as it is broken by the current breaking lever f", the latter having
resumed its normal position after having broken the circuit by reason of the return
of the pallet to its central position when the circuit was broken, so that a second
impulse will be sent through the transmitting magnet F1 and receiving magnet c' to
again attract their respective armatures and inove their respective pointers a second
step, to indicate an increased speed over that indicated by movement of the said
pointer one step and in like manner the contact e2 is moved another step forward
and away from the contact arm e and the circuit is again broken by the circuit
breaking lever f18.
Successive impulses are sent over the line in this manner, each impulse moving
the indicating pointers of the transmitter and receiver one step to the right, until
the contact has been moved by the cam slot e', such a distance that the contact
arme, actuated by the governing balls will not follow it, such indicating that the
highest speed of the shaft has been reached, the indicating pointers of the trans-
mitter and receiver having been moved by the successive impulses sent over the
line into proper positions to indicate with relation to the proper dials that a certain
speed has been reached in the rotation of the shaft, such speed being recorded by
the receiver in the manner referred to in said application for Patent.
The successive impulses sent over the line have all been of the same polarity and
passing through the polarized magnet S, said impulses will cause the core of the
said magnet to attract one or the other of the permanent magnets so, or s², as for

page_text: instance the magnets, to raise the annunciators, so that the word "Ahead" will
be displayed through the opening in the dial of the receiver, thus showing that the
rotation of the shaft is in a direction corresponding to the meaning of the word
"Ahead," this, taken in connection with the position of the indicating pointer of the
receiver, showing the speed and direction of rotation of the shaft.
If now the speed of the shaft should decrease, the governing balls will be drawn
nearer their axis of rotation and will move the contact arm e in the opposite
direction into engagement with the contact e', in which case an impulse will be sent
through the transmitting magnet F and through the receiving magnet c of the
receiver, the circuit being then traced as follows:
From the generator G by wire 40, spring pen m*, contact ring m² on the block m¹,
wire 37, spring f", circuit breaking lever 15, wire 38, contact arm e, contact e
wire 30, contact 4, wire 32, transmitting magnet F, line wire 34, receiving magnetc,
through the polarized magnet S, line wire 36, back to the contact ring m³ on the
block m¹, through the spring contact m³, and wire 41 to the other pole of the
generator, such impulse causing the transmitting magnet F to attract its auxiliary
armature h, to bring the arm 26 of the auxiliary armature carrier into engagement
with the contact ³ to shunt out the contact arm e and its contact e' in the manner
previously described and permit the current from the battery to pass from the
pivotal point of the contact arm e, through the base of the instrument and auxiliary
armature carrier direct to the contact ³, sending a strong impulse through the
transmitting magnet F, causing it to attract its main armature f, to move the
pallet to the right Fig. 4, and move the driving wheel e¹³, and the shaft e³, in
the directions opposite to that indicated by the arrows, to run the indicating pointer
of the transmitter one step back towards its normal position to indicate that the
speed has been reduced the number of revolutions represented by movement of one
step.
The same impulse sent through the receiving magnet c of the receiver, will act
to move the pointer of the receiver also one step back towards near its normal
position to indicate the reduced speed at that point, the said impulse being, however,
of the same polarity as the impulses sent through the transmitting magnet F¹ and
the receiving magnet c', the position of the annunciator controlled by the polarized
magnet S not being changed.
As the staff e, is rotated to move the indicating pointer of the transmitter one
step back, the cam e8 will move the contact carrier back towards its normal position
one step to move the contact e¹ away from and out of engagement with the contact
arm e, the circuit being broken as before also by the circuit breaking lever f15.
Should the speed of the rotation of the shaft a, continue to decrease, the further
movement of the governing balls toward their axis of rotation will cause the
contact arm e, to follow the movement of the contact e' away from it and to close
the circuit at that point again as soon as it is broken by the circuit breaking
lever, thus sending a second impulse through the transmitting magnet F and the
receiving magnet c to move their respective pointers a second step back, to indicate
the further reduction of speed.
These successive impulses are sent through the transmitting magnet F and
receiving magnet c so long as the speed continues to decrease, the pointers being
moved at each impulse one step back towards their normal position, so that the
position of the said pointers both of the receiver and transmitter will at all times
indicate the true speed of rotation of the shaft a.
During all this time the pins n³, on the disk n', which rotates with the shaft a,
have passed freely beneath the pawl n, in the direction opposite to that indicated
by the arrow 25 without moving the spindle m.
If, however, the speed of rotation of the shaft a, should continue to decrease until
it should stop, the indicating pointers of the transmitter and receiver would be
moved back to their normal positions, indicating that the shaft was not in 5
motion.
If the shaft should be again rotated, but in a direction indicated by the arrow

page_text: Fig. 3, the governing balls would move away from their axis of rotation in precisely
the same manner as before, and would send the successive inpulses through the
transinitting magnet Fi and the receiving magnet c', cause their indicating pointers
to be moved to the right to indicate the gradual increase in speed in precisely
the same manner as described when the shaft a was rotating in the opposite
direction.
It is necessary, however, to be able to distinguish the difference in the direction
of rotation of this shaft, and this is accomplished at the receiver by means of
the electro-magnet S, with the co-operation of the sliding block m' in the
transmitter.
As the direction of rotation of the shaft a, of the transmitter is changed to the
direction indicated by the arrow 25, the pins n³ on the disk n' striking the dog n
from the opposite side, will first tip the same on its pivot and then move the dog
and the spindle to which it is pivoted, bodily to the right Figs. 3 and 10, carrying
the contact rings m³, m³, on the insulated block m' from engagement with the spring
pens m, m³, as in said fig., into engagement with the spring pens m³, me, so that the
direction of the current now sent to the receiver and returning through the electro-
magnet S, will be reversed, for by reference to Fig. 10, whereas when the shaft
was rotating in the direction opposite to the arrow 25 Fig. 3, and the contact
rings m², m³, were in engagement with the pens m', m³, the current from the
battery G leaving by wire 40, passed first through the ring m³, wire 37, thence by
wire 34 or 35 to the receiver, and back by wire 36 to the ring m³ and pen m³, now
with the position of the block m³ changed, the current from the battery by wire 40
will pass through the pen m and ring m³ through the wire 36, magnet S of the
receiver, and back through either the wire 34 or 35, thus traversing the wire 36 in
which the polarized relay is located, in a direction opposite to that in which it
passed when the block m¹ was in its first position, reversing the polarity of the
said magnet and causing it to repel the permanent magnets, which it had
previously attracted, and attract the magnets, previously repelled.
This change of position of the magnets,, due to a change in direction of the
current traversing the electro-magnet, causes the annunciator, to be moved into
its lowermost position to display the word "Astern" or some word or sign of
equivalent or desired purport, showing that the direction of rotation of the shaft is
now opposite to the direction in which it rotated when the word "Ahead"
displayed.
.
was
Thus while the indicating pointer of the receiver always moves in the same
direction to indicate increased speed, and always in the same direction to iudicate a
decreased speed, whether the rotation of the shaft a be in one or the other direction,
the particular direction in which the shaft is rotating will be indicated by the
particular word or character displayed at the opening in the dial by the annunciator,
such character being changed by the annunciator and polarized magnet whenever
the direction of the current is changed, such polarity being changed whenever the
direction of rotation is changed through the dog n, and the block m².
At the transmitter the change in direction of rotation is in this present instance
indicated by a purely mechanically actuated annunciator, for as the insulated
block m carrying the contact rings m², m³ is moved by the dog n to change the
direction of the circuit, to indicate the change in direction of rotation at the receiver,
the pin t' on the said block will move the crank arm to, to turn the rock-shaft and
move the annunciator either upwardly or downwardly, to display either "Ahead" or
"Astern or words or characters of like or desired purport, whichever should be
displayed behind the opening 4, to indicate the direction of rotation of the shaft.
"
Where the device is to be used at the point where the rotating shaft is located,
as for instance, the shaft being in one room and the transmitter in an adjoining
room, the transmitter may be used alone as a self-contained indicating device, it
indicating the speed and direction of rotation of the shaft as described, and if
desired in place of the mechanically actuated annunciator shown as applied to the
transmitter, an electro-magnet may be employed in precisely the manner in which

page_text: such a magnet is employed in the receiver to indicate changes in the direction of
rotation by means of a change in direction of an electric circuit, rather than by
mechanical means.
This invention is not limited to the particular arrangement and construction of
parts herein shown and described, for the same may be varied without departing
from the spirit and scope of this invention.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. In a telemeter system or means or apparatus for indicating, or indicating and
recording electrically at a distance motions of rotatory parts of machinery the use
of an indicating device to record the changes in speed of rotation of a shaft, and
a speed indicating device to indicate the changes in the direction of the shaft,
substantially as described.
2. In a telemeter system or means or apparatus for indicating, or indicating and
recording electrically at a distance motions of rotatory parts of machinery the use
of an indicating device and a contact arm moved by changes in the speed of
rotation of the shaft to make aud break an electric circuit to thereby operate said
indicating device, and a separate indicating device actuated by changes in the
polarity of the said circuit to indicate the changes in the direction of rotation of
the shaft, substantially as described.
3. In a telemeter system or means or apparatus for indicating electrically at a
distance the changes in speed and direction of rotation of a shaft, the use of an
indicating device to indicate the changes in speed of the shaft, and a pin rotated
by the shaft, a movable spindle having a dog to be engaged by said pin to move
the spindle whenever the direction of rotation of the shaft is changed, to thereby
change the polarity of an electric circuit and by such changes in polarity operate
the indicating device to show the change in direction of rotation, substantially as
described.
4. In a telemeter system or means or apparatus for indicating, or indicating and
recording electrically at a distance motions of rotatory parts of machinery the use
of a rotating shaft, two transmitting magnets responsive respectively to increase
and decrease in speed of rotation of the shaft, two receiving magnets, the circuits
of which are controlled by said transmitting magnets, a speed indicating device
actuated by said receiving magnets, and a device operated by changes in direction
of rotation of the shaft to change the polarity of the circuits of said magnets and
thereby the indicating device to indicate the changes in direction of rotation of
the shaft, substantially as described.
Dated the 16th day of January 1893.
WM. BROOKES & SON,
55 & 56, Chancery Lane, London, Agents for the Applicant.