US339718A - Ernest p - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1. E. P. WARNER.

' INDIVIDUAL ELEGTRIU SIGNAL.

No. 339,718. Patented Apr. 13, 1886.

177/0670 Ernest-Z? hid aorne y N. PETERS. PhMn-Lilhognphor. Wathingtnn. D.C

(No Model.) 2 Sheets-Sheet 2. E. P. WARNER. INDIVIDUAL ELEGTRIG SIGNAL.

No. 339,718. Patented Apr. 13, 1886.

EWoea]? wrrae Zyfili? 661 /60 r726 N, PETERS. Fholohkhogmphn, Washington. D. c

NITED STATES PATENT OFFICE.

ERNEST P. VARNER, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE \VESTERN ELECTRIC COMPANY, OF SAME PLACE.

INDIVIDUAL ELECTRIC SIGNAL.

SPECIFICATION forming part of Letters Patent No. 339,718, dated April 13, 1886.

Application tiled March 13, 1885.

T aZZ whom, it may concern.-

Be it known that 1, ERNEST P. WARNER, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Individual Electric Signals, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to that class of individual electric signals in which the several signal-bells included in or upon an electric circuit have their actuating electro-magnets normally shunted, and are each controlled by normally-quiescent clock-trains, which, when a signal is to be transmitted, can be simulta neously set in motion, and which thereupon successivelyintroduce the signal-bell magnets into the circuit for a short and definite space of time, during which and at no other time the alarm can be sounded upon the bell.

Heretofore and prior to my invention it has been customary to operate individual signals controlled by clock trains in various ways-for example, Letters Patent issued to George H. Bliss, January 13, 1880, and numbered 223,469, show signal-bells connected serially in an electric circuit, and having their armatures mechanically controlled by clocktrains which at all times are in operation, and which release each armature at a different time from the others for a short period, during which the signal may be given.

Letters Patent issued to George H. Bliss, March 9, 1880, and numbered 225,327, describe, in addition to the foregoing instrumentalities, a shunteireuit normally surrounding each bell-magnet, said shunt being automatically 0 broken by the clock-work at each bell during the time that the armature of said bell is released.

Letters Patent issued to Francis Blake, J r., September 21, 1880, numbered 232,442, show and describe a series of signal-bells in a linecircuit, each normally shunted from the circult and each shunt controlled by a normallyquiescent clock-train, and adapted by suitable mechanism connected with said clock-train to be opened, so as to include each bell suc- Serial No. 158,767, (No model.)

cessively into the circuit, combined with an automatic transmitter at a central station capable of being set to correspond with any one of the signaling-bells, so that while all of the clocks were set in motion at each signal, only the station corresponding with the trans mitting device would be signaled. This patent was subsequently reissued, June 7, 1881, as No. 9,749.

Letters Patent issued to George H. Bliss, 5 May 24, 1881, No. 241,914, in addition to a series of electric bells normally shunted from the main circuit and clock-trains to break said shunts, show and describe a separate and normally-open shunt-eireuit adapted to be closed around the starting-magnets immediately after the function of said magnet is subserved, and to be automatically reopened as soon as one revolution of the clock is completed.

Letters Patent issued to Theo. N. Vail, September 6, 1881, No. 246,696, show and claim a elock-movement having a stop mechanism which is arranged to stop the oscillating governing portion of the escapement at or near the end of its oscillating movement with the hair-spring in tension, so that when released it is at once ready again to oscillate.

I understand that the patents which I have thus cited and briefly described represent the state of the art prior to my invention.

Instrumentalities based upon the combined inventions described in the foregoing patents have some time been in use and have become commerciallyknown as Bliss Blake, or, more briefly, as Bliss, clocks. They have, 8 however, developed certain defects in practical operation.which, by my invention, I aim to overcome. These instruments as heretofore constructed have invariably been maintained in a normally-quiescent condition by means of various kinds of detents or eatches,upon which to set the clocks in motion, the starting electro-magnets have been required to act directly. The successful operation of the starting device has thus depended altogether upon the strength or power capable of being exercised by the electromagnet. This has rendered the use of very light and delicate clocletrains a necessity as the attractive power of an ordinary eleetro-magnet is obviously insnt'ficient 10o to safely control trains of great power and mechanical moment, while it is equally manifest that it is inconvenient to employ starting electro-magnets sufficiently large and powerful to control in a direct manner clock-trains capable of doing the'work of circuit-changing with trustworthiness and precision. It has,

moreover, been found undesirable in practice other occasions when a clock has duly started it fails to properly effectuate the circuitchanging operation and stops prematurely before completing its revolution, it being understood that the clocks employed in this class of signali ng make but a single revolution of their operating-arbor at one trip,stopping thereafter at a common unison-point.

One of the objects of myinvention is toprovidea circuit-controlling clock having an extremely powerful train and motive power, the

starting mechanism of which shall not be dependent upon the power of the starting electro-magnets directly exerted, whereby, while I may employ a clock-train of extra power, 'I am enabled also to employ a starting-magnet therefor of but ordinary size and strength, and to energize the same by a comparatively feeble current.

One part of my invention consists of the swinging weight or shutter which is raised by the clock-train during each revolution to a point where it is supported as long as the starting-magnet remains unenergized, the superfluons energy of the said motor being thus stored as potential energy, while the weight remains elevated. The entire worlcof the electro-magnet consists solely in withdrawing the support from this swinging weight, which then falls forward upon the detent of the clock- 'train,releasing said detent andpermitting the clock to start. It will readily be observed that although considerable force is required ,to releasea strong train, the said force 'is at first stored by the train itself in raising the weight,'this being ultimately utilized in the fall of said weight, the momentum and power being greatly amplified by the height from which it falls;.or, in other words, its potential energy is made kinetic and does work in the transformation.

Another defect heretofore existing in stationjsignaling apparatus,depending for its success upon the proper operation of 'cloclctrains, is

the fact that the said clocks, whether actuated by weight or s1: ring,'would, if permittedto rest.

run down, render the entire signaling mechanism inoperative, inasmuehas no way would be afforded to break or open the normallyexisting shunt-circuit surrounding thehelices of the bell-magnet, and the said signal-bell consequently could be operated no more until the fact that the clock had run down could be ascertained and remedied by rewinding. To prevent the occurrence of such mischanees is another of the objects'ofmypresentinvention'; and I attain this end by providing 'an automatic winding-alarm so arranged'that when tion of the subscriberis thus called to the fact that thelclock requires winding and that op.

eration is thereupon promptly performed.

The said alarm mechanism comprises an additional spring-circuit changer in the bellmagnet 'shuntcircuit, which circuitchanger is placed in the path of and adapted to be engaged by a toothed or star wheel, or bya pin if attached thereto after the said wheel has advanced toa certain fixed pointin its orbit. This wheel bein'g engaged and driven by a second wheel or cam placed on the main or spring shaft or arbor, the several elementsaresocarranged that the spring-circuit changer is lifted by the wheel and adapted to engage'therewith before the energy of the motive power is exhausted,and the shunt-circuit is thus broken and the bell-magnet introduced into the main circuit for the time being. When the clock is wound up,the wheel on the spring-shaft is restored to its original position, ready to resume its function.

My invention furthermore consists in certain details of construction and arrangement;

which will hereinafter be more specifically pointed out in the claims.

In the drawings,whieh illustrate this inven- IKO tion, Figure 1 is, a perspective view of the moment the detent" is tripped and the train started. Fig. 6 shows the same parts when the current is withdrawn from the electro-' magnet and the revolution nearly completed. Fig. 7 shows in perspective the position of the releasing-weight. and detaining-gear when at balance-wheel. Fig. 9 is a diagram illustratingthe normal circuit arrangement at a given station, the alarm-bell magnet being shunted and the starting magnet in the main circuit.

Fig. 8 is a detail in perspective showing a portion of the governing escapement and i Fig. 10.is a diagram representing the circuit arrangement at a given station when the alarm is in operation, the bell-magnet being brought into circuit and the starting-magnet shunted out of the circuit.

At each station on a telephone circuit the alarm is normally shunted from the main line, a clock-train, 7, being provided controlled by an electro-magnet, M, the eleetro-magnets at all stations being normally included in the circuit. The office of the clock-trains (which are normally inert) is, when started by the impulse of a current sent from any station fiowing through the starting-magnets, to first close a shunt-circuit round all of the said starting-magnets, which shunt-circuit is maintained until the clocks come nearly to rest at the end of the revolution; and, secondly, to break successively the shunt circuits round the signal-bells, so that any station, by watching a pointer, 1, which rotates round the dial B of its own instrument, can tell which bell at any instant is in circuit, and by sending signals at that moment will sound an alarm upon the bell responding to the figure indicated, and upon no other.

I will first describe the arrangement of circuits at several stations, referring to the diagrams, Figs. 9 and 10. Fig. 9 represents the arrangement of the signaling-circuits at each station when at rest. The main line, entering at 7, is attached to the apparatus at the screw terminal 21, where it divides, one branch leading by the wire 1 to the circuitchanging spring 1), where it remains open or insulated as long as the apparatus is inert. The other branch leads through the starting-magnet M by wires 2, and then passes to the screw terminal 22, where the line is again divided, one branch passing by wire 3 to the circuit-changing point q, where it remains insulated, while the other branch wire, 4, leads to one of the screw terminals, 25,0f the bell G. the magnet-coils of said bell G to the terminal screw 26, and by wire 9 to the generator H, entering the same by screw 27 and leaving by screw 28, thence to wire 10, and outward to the next station. It will be observed that the alarm-bell G is shunted or short-circuited by a loop connected on one side with the bindingscrew 25 and on the other with the bindingscrew 26,and passing between the said points by wire 7 to screw 23, circuit-changing spring 9', point 1-, wire 6, contact-point q, circuitehanging spring p wire 5, screw 24, wire 8, and junction-point 29. A shaft, I), having cams Z) and If, is actuated by the clock-work to operate the circuit-changing springs 12 and The circuit-changer 1) controls a shuntcircuit round the starting-magnet M. At each station the cams b are attached to the same point on the shaft 7), while the cams b differ in position for each station. when the generator H at any station is operated, the magnets M at all the stations are energized, and

The main line then continues through through the intermediation of suitable mechanism, to be hereinafter described,clock-work is released, actuating the cam-shaft b. In the revolution of said shaft the cam I) is immediately withdrawn from spring p, and said spring consequently falls upon the point q, thus completing the shunt-circuit round the starting- magnet m'a wires 1 and 3, spring 1), and contact-point q. As the revolution ofthe shaft continues, the cams b successively lift the spring 1) from their points q, thus introducing the several bell-magnets G successively into the main line by breaking the shunt round them, as shown in the diagram,Fig. 10, which represents the circuit arrangement of a single station at the time when its bell may be rung. The starting-magnets remain shunted until the revolution of the shaft is nearly completed, when the cams return and lift the springs p into their normal positions.

The only difference between the several arrangements of Figs. 9 and are those which I have described. The springs p and p, together with their contact-points, are mounted on an insulating-block, 19*. A circuit-changer, r r, is shown in the bell-magnet shunt-circuit, the function of which I shall hereinafter describe. The circuit-changers to be efficient must bear upon their contact -poiuts with power, and must themselves be rather stiff. It will now be understood that if the circuitchanging function of the clock-movement is to be efficiently and reliably performed, the said movement requires a motor of considerable power or strength,in order that the varying strains imposed thereon may be successfully met. Iaccordingly employ cloek-workVV of great strength, and a mainspring, M S, of corresponding power, a power, in fact, much greater than the work to be done actually requires. The clock-work is of course governed through the spur-wheel 2, (shown in dotted lines in Fig. 4,) and a pinion on the escapement-wheel axis by a balance-wheel, m, escapement-le'ver 0, oscillating on the arbor 0, and escapement S, in a manner well understood. A weight may, however, be substituted for the mainspring, if desired. The motor may be wound when required by means of the winding-shaft t.

Referring to Fig. 3, it will be seen that the mainspring drives a suitable train, which, when in motion, rotates the operating-shaft b, which carries on its front end the pointer P, and its other end the cams b and b,which operate the circuit-changing springs, as already described.

The stop mechanism of the clock is constructed as follows, as shown in Figs. 3, 4, 5, 6, 7, and 8. On one of the arbors, preferably the arbor b, carrying the cams and pointer, is fixed a disk, 9, having a notch, g, cut in its edge, while on the balance-wheelarbor 7c is a hook or catch, k. This hook is so set upon the balance-wheel arbor or shaft k that it holds the hair-spring in tension on one side of the center of oscillation whenever it is engaged'by the detent j A stop-lever, h, is pivoted. to the frame a at i, and has, near the end of its longer arm, a pin, h', projecting at right anwith the hook it, thus holding the hair-spring in tension, "as before stated. The balance is thus stopped slightly to one side of the center of oscillation and there retained as long as the pin If remainsin the notch g. The movement is thus prevented from stopping with the balance-wheel at the dead-point.

The starting mechanism. is constructed in the manner to be now described. On the same arborb that carries the notched disk 9 is a small swinging weight or shutter, d, that is free to move loosely round the shaft, which hasa pin, d, projecting sidewise therefrom. A small carrier or driver, 0, is rigidly attached to the shaft and has arms 6 6. These are in the same vertical plane with the The rebound of the shutter is prevented by the notch or shoulder h (shown on leverh) and pin (1 of the weight, as shown in Fig. 5. The weight of the shutter as it passes over the said shoulder in falling slightly depresses the lever j,- but the lever, being weighted at j, immediately comes back to its former position, and then the shoulder is in position to forma stop, as before described. When the clock is stopped, the weight d is, as shown in Figs. 4. and 7, inclined slightly forward of its center of gravity, and is prevented from falling by a hook in the end of alight detaining: lever, B. This is made of a single wire and is pivoted at f. The armature N of the starting-magnet M is provided with a metalplate extension, 0, prevented from inordinate outward movement by the limit-stop y,a11d providedwith a curved end, which touches lightly the short end of the tripping-lever R. The weight or shutter rests lightly against the hooked end of the lever B when the mechanism is in the position shown in Fig. 4. When, therefore, the electrormagnet M is energized and the armature N attracted in the slightest degree the lever B is raised and the weight d falls, as shown in Fig. 5. In the fall of the weight 01 the projecting pin 11 thereof strikes the lower lever, h, ata time when its line of motion forms an acute angle with the line of the lever, and, by the momentum given to the weight in falling, thelever. so struck is forced downward;

withdrawing the pin h from thelnotch g and releasing the detent, thusallowing the clock. to start. The pin-.dofthe weight first falls on the main portion of the long arm of the lever h, thus forcing itclear of the disk but as the arbor .b rotates the carrier e or e advances with it, and upon reaching the weight begins to raise the same, so that theprojecting pin 13 thereof, if its. momentum has not already carried it by the shoulder h first slides over the shoulder h and. onto the thinner portion b of the lever-arm, and subsequently leaves the said lever-armaltogethenbeing raised by the carrier 6, as shown in Fig. 6. This permits the lever h'to rise; but sincethe notchg is not opposite or in line with pin h it merely strikes upon the periphery of the disk 9, and there rides-untiltheretnrn of the notch g, which allowsthepin to enter therein. It is thus evident that thework requiredv to start the clock-work is partly conserved by the clock-train itself in raising the weight d, which,

by itsmomentumwhen released, releases in turnthe clock-workfor another revolution.

I thus efl'ect great economy in thestrengthof current necessary to start the clocks, and am enabled to use a train of anyrequired power to actuate .the circuit-changers.

In Fig. 3 I show-a spur-wheel, Q, gearing with apiniomw, on theaxis of the pointer.- A face view-of the samewheel is shown in Fig. 3. Its front surface is divided intofour parts, the two opposite. parts, 11, which are shaded, representing some bright color-such as'redwhile the other and unshaded portion, V, may be white. When the case A is in place, the hole or aperture Tis opposite that one of the division. which is at the lowest point, so that sometimes a red and sometimes awhite signal appears at the aperture. Thewheel Q is so proportioned to. the pinion a; that it makes but one-fourth of a revolution 'during the time that 'the said pinion, and of the conversation a1 ring-off signalis given,

and the wheel Q,making another quarter-revo- 1ution, brings the white surface. again to the front, indicating that: the line is at liberty.

A third feature of my invention is to provide'means to indicate when the clock. needs winding. This: I accomplish by devices shown in-Figs. 2, 9, and .10." A circuit-changer consistingofa spring, 1-, andcontact-pointir',

mounted'upon a non-conducting block, W, is

affixed to the frame a of the instrument, and constitutes a part of the normally closed shunt-circuit round the bell-magnet G. A star- Wheel is fixed upon a stud, s, and has a horizontally-projecting pin, a. Upon the axis 15 of the mainspring or motor-drum is another wheel or cam, t, rigidly affixed thereto, and adapted to engage the star-wheel and advance it a short distance each time the said axis revolves. The star-wheel is initially adjusted, so that a short time before the spring or weight runs down the pin a will be brought to bear upon the free end of the spring 1-, lifting it from its contact-point a", and thus opening the shunt-circuit. The effect of this is that while the subscriber at this particular station might be called, yet as magnet M, and also the magnet of the signaling device will be in the circuit when the clock is at rest, the current which starts the clock will cause the bell to ring, and for the same reason any signal sent through the station to another station will cause the bell to ring. The subscriber observing that the bell rings when the pointer is not on his particular number or space, knows that the clock is nearly run down and winds it up.

The figures on the dial in Fig. 1 indicate the numbers of the several stations. 7

I do not confine myself to the particular mechanism described for indicating the necessity of winding, since other means would suggest themselves to a mechanic. I may, for example,use an electro-magnetic alarm actuated by a local circuit, as shown in Fig. 2 in dotted lines, in which H is a vibrating bell; L B, a local battery, one pole of the battery connecting by wire 31 to the frame-work of the instrument, and the other is connected with one of the bell-terminals. The remaining bcll-terminal connects by wire 30 with the spring 9'. lVhen, now the, pin a of the star-wheel 8 comes into contact with thespring 1-, the local circuit is closed and the bell rings.

I do not claim as my invention a telephone alarm or series of alarms normally shunted from the main circuit, but adapted to be introduced therein through the instrumentality of clock-work electrically controlled from a distant station; nor do I claim apparatus operating a circuit-closer to shunt its own actuating-magnet immediately after it has been set in motion by the said magnet; but

I claim- 1. In an individual signaling apparatus, the combination of a clock-train, stop mechanism therefor comprising a hook or catch on one of the arbors of said train, and a pivoted lever adapted to engage the said catch and thereby stop the said clock-train, so as to hold the balance in tension, and starting mechanism consisting of a swinging weight, a hook-lever supporting the same against gravity over and in line with the stop-lever, an electro-magnet included in the mainline circuit, and an armav ture-lever operated thereby and adapted to trip the said hook-lever and release the said weight, allowing it to fall on the stop-lever and disengage the same, starting the clocktrain, substantially as described.

2. The combination,with a clock-train, of a notched disk fixed to the pointer-arbor and a pivoted lever carrying apin which is adapted to enter the notch in said disk and the balancewheel arbor, theleverj, and the stop mechanism k, whereby the clock is stopped with the said balance in tension, after every revolution of the said arbor, a swinging weight loosely attached to the said pointer-arbor, mechanism actuated by the clock-train for raising the said weight, a tripping-lever for maintaining the weight in position when raised,and an electromagnet adapted when energized to lift the said lever and permit the said weight to fall upon the stop-lever and disengage the same for the purpose of starting the clock, substantially as described.

3. The combination, in an electricallycontrolled clock-train, of a working-arbor driven by said train, a notched disk attached thereto, a hook or catch on the balance-wheel arbor, and a weighted pivoted lever adapted to engage with the said catch, with a shutter or weight loosely attached to and swinging on the said working-arbor, a carrier rigidly attached to said arbor and adapted to lift the said weight, for the purpose of furnishing starting-power, a hooked lever for holding the said weight when elevated in a position gravitating forward, and an electro-magnet controlling said lever and adapted to trip the same, whereby a low degree of magnetic strength is enabled to start a strong and powerful clock-train, substantially as described.

4. A substation signaling apparatus conr prising the following instrumentalities an electro -magnetic signalinstrument, a normally-closed circuit shunting the same, two independent circuit-changers included in said circuit, a clock-train adapted to actuate one of the said circuit-changers opening the said closed circuit, and thereby including the signal-instrument in a main circuit connected therewith once each revolution of the center arbor, in order that the individual stationalarm may be given, and to actuate the other circuitchanger, accomplishing the same operation at or immediately before the motor of said clock-train is exhausted, whereby all signals sent on the main circuit are received on the signaling-instrument, thus indicating the necessity of rewinding, an electro-magnet connected to the main line controlling the said clock-train, and a normally-open branch cir cuit shunting the said electromagnet and adapted to be closed by the action of said clock-work immediately after the same is set in motion and to be reopened before the said motion is arrested, substantially as described.

5. The combination of a main electric circuit, a branch or derived circuit therefor, and two independent circuit closers or changers, both included in the said branch circuit and e gems controlling the continuity thereof, one'of the said circuit-changersbeing operated by the center or pointer arbor of a'train of eloek-- work and the other-by separate devices actnatedby the mainspring or winding-arbor of said clock-train, whereby the derived circuit may be opened and reclosed once in each revolution of the center arbor, and also opened for an indefinite period after one or more revolutions of the winding-arbor, substantially as described.

6. The combination, substantially as hereinbefore described, with a main electric circuit and a signaling-instrument adapted to be may bethereuponsounded on the said sigualnumber of revolutions thereof,'to break the shunt-circuit, for the purpose of introducing the signaling-instruineutinto the main circuit when the motor of said clock-train is completely or nearly run down, so that ,all signals ing-instrument.

7. The combination,in an electric signaling system, of a main circuit and electric bellalarm included therein, a normally-closed shunt-circuit around the magnet of said bell, two circuit-closers included in said shunt-circuit, a clock-train and starting-magnet therefor adapted to operate one of said circuitchangers, opening the shunt-circuit thereat when a signal is to be. received and closing the same immediately thereafter, and mechanism for operating the second circuit-closer, opening the said shunt-circuit and holding the same open when the clock-motor has run down, substantially as described.

8. The combination, substantially as hereinbefore described, of one or more circuit closers or changers, a clock-train actuating the same, a stop mechanism therefor adapted to stop the said train with its balance-wheel in tension, a starting device comprising a weight raised by the clock-work itself during one revolution, and adapted by its fall to disengage the saidstop mechanism ,and an electro-magnet armature and hook-lever controlled thereby, arranged to maintain the said weight normally ln position, but to release the same, permitting it to fall for the purpose of starting the clock when the electro-magnet is energized, for the purpose specified.

9. The combination, in a train of clock-work, of the disk 9, fixed to the driven arbor, and

having. the notch -g,the catch-Jr, fi XEd'OH'thG:

balance-shaft, the drop-weightd, adaptedto;

be raised by the power' of tliexclock-train to av forwardly gravitating position, and provided. with the pin (1, the hook-detaining lever therefor, and an electromagne't controlling the same,and the pivoted stop-lever h, adapted to engage the catch'k and to be released therefrom when struck by the pin d of the falling.

weight, the said'lever It being also provided with a projecting pin, h, adapted to ride upon the periphery of the notched disk until the notch arrivesopposite thereto for the purpose of maintaining the disengagement of the catch It, substantially as described.

10. The combination, substantially as hereinbefore described, of the lever h, the notched disk 9, the pin h, adapted toenter the notch.

in said disk, the weight (I, and pin d, attached thereto, whereby the weight when fallen. 18

adapted to disengage the lever and disk and to maintain the said disengagement, and-the carrier or driver e c, for lifting the saidweight, all cooperating as and forthe purposes specified.

11. The combinatiomwith an electrical'sig; nal apparatus and a clock-train controlling the same, the said clock being normally at rest and providedwith a pointer fixed upon its working -,arbor, and also adapted when started, to stop after a single revolution'of said pointer, of a visual signal consisting of a disk having a toothed edge gearing with a pinlon on the pointer-arbor, and adapted to rotate at a speed having a definite ratio to the speedof said pointer-arbor, the said disk, having its face divided and a part thereof specially colored, and being arranged to show the colored portion'only during the time that theline is being used, substantially as described.

12. The combination, with a clock-spring, of aweight which is raised by the force of said spring, a lever which normally holds said.

weight from falling, an electro-magnet in an electric circuit, and its armature for tripping said lever, so as to release the weight when IIO theelectro-magnet is energized, a lever or de-' tent which normally holds the train and which is moved by the force of the falling weight, therebyreleasing the clock-train-and allowing the said clock-train to be started, actuated by the force of the spring, asde scribed.

13. The clock-train normally held by the pivoted detent or lever which engages witha hook or catch upon the balance-wheel arbor, a weight moving freely around the workingarbor, a carrier for lifting said weight attached to and moving with the arbor,-the lever by;

which the weight is held when raised by the carrier, an electro-magnet in anfelectric cir: cuit whlchwhen energized operates to trip the said lever and release the weight, which,

falling upon the pivoted detent, disengages the same from the catch upon thebalancestafi', whereby a portion of the force of the mainspring is stored and used to release the lever h, against which the weight rebounds, :0 clock-train, substantially as described. as and for the purpose specified.

14. The combinatiomwith the weight,of the In witness whereof I hereunto subscribe my carrier provided with the wire or arm 6, name this 10th day of March, A. D. 1885. which comes under the weight and lifts the T same, and the wire or arm 6, extending in the ERNEST WARM opposite direction, which serves as a stop for \Vitnesses: said weight and prevents the same from swing- G. "W. \VILOOX, ing' inordinately, and the shoulder upon the F. H. MOCULLOOH.

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