US595911A - fischee - Google Patents

Description

(No Model.) *1 3 Sheets-Sheet 1. S. .HSCHEB ELECTRIC 01300K.

No. 595,911 Patented Deo. 21,1897.

ATTORNEYS (No Model.) 3 Sheets-Sheet 3.

s. FISCHER. ELECTRIC CLCCLQ No. 595.911i Patented 1390.21, 1897.

UNITED STATES PATENT SIGISMUND FISCHER, OF NEW YORK, N. Y., ASSIGNOR TO THE FISCHER ELECTRIC CLOCK COMPANY, OF SAME PLACE.

ELECTRIC CLOCK.

SPECIFICATION forming part of Letters Patent No. 595,911, dated December 21, 1897.

Application filed October 21,1896. Serial No. 609,553. (No model.)

Be it known that I, SIGISMUND FISCHER, a citizen of the United States, residing in the city, county, and State of New York, have invented certain new and useful Improvements in Electric Clocks, of which the following is a specication.

This invention has reference to certain improvements in theI electric clock for which Letters Patent No. 555,313 were granted to me heretofore, dated February 25, 1896, said improvements being designed with the object that the clock can be used as a mantel-clock, in which all the parts are arranged in a smaller compass, the battery located in the base of the clock, and both the going-train and the hour and half-hour striking train are operated electrically and considerably simplified, so that the clock can be sold at a greatly-reduced price as compared to electric clocks heretofore in the market.

The invention consists of an electric clock in which the pendulum is driven by electric impulses imparted to it by a primary battery, which operates the going-train and the striking mechanism,the latter being so constructed that the full hours, as well as the half-hours, are struck by the action of a striking-wheel, striking-arm, and striking-finger operated by the going-train of the clock, in connection with a notched wheel on the main ratchetwheel of the going-train, by which and the striking-finger a so-called slow stroke is imparted to the striking mechanism.

The invention consists, further, of certain improvements in the going-train of the electric clock in which no eseapement is elnployed, whereby the hands of such clock can be set independently of the going and striking trains.

The invention consists, further, of certain details of construction and combination of parts, w rich will be fully described hereinafter and finally pointed out in the claims.

In the accompanying drawings, Figure l represents a front elevation of my improved electric clock arranged in the form of a mantel-clock. Fig. 2 is a rear elevation of the same, partly in vertical transverse section through the base, in which the primary battery is arranged.

Fig. 3 is a side elevation,

partly in vertical transverse section on line 3 3, Fig. 2. Fig. -t is a rear elevation of the going and striking trains of the clock with the rear plate removed and drawn on a larger scale. Fig. 5 is also a rear elevation showing the parts of the going-train only. Figs. 6, 7, and 8 are detail rear elevations of the striking-train for the full and half hours, showing, respectively, the position of the parts before and after striking the half-hou rs and after striking the full hours. Figs. i) and lO are respectively a vertical transverse section on line 9 9, Fig. l0, and a rear elevation of the mechanism by which the strokes of the full-hour-striking mechanism are retarded.

Similar letters of reference indicate corresponding parts.

Referring to the drawings, A A represent the frame of my improved electric clock,which is attached to an upright face-plate B and which consists of a front plate A, that is made in one casting with its studs and brackets, and of a rear plate A', screwed to said studs. From a horizontal stud b of the upper part of the supporting-frame A is suspended a pendulum P in the usual manner. The pendulum-rod P is engaged by the lower forked end of a crutch O, which is attached at its upper end to a spindle CZ, that turns in bearings of the supporting-frame A A. On the frame A A is mounted an electromagnet E, between the pole ends of which is arranged an oscillating armature E', which is centrally attached to the spindle d. The ends of the armature E, as well as the adjacent polefaces of the cores of the electromagnet E, are made concentric to the axis of the spindle d, so that the ends of the armature can pass closely to said pole-faces as it is oscillated by the beats of the pendulum P. On the crutch C is arranged a block f, which passes through an arc-shaped slot f in the rear plate A of the supporting-frame and which is provided in its upper part with a V-shaped recess that is engaged at certain intervals of time by a wedge-shaped pendant F, that is pivoted to the inner end of a fulerumed contact-lever F, the outer end of which is provided with an agate-heel f2, that presses on a contactspring F2, which is intermittently placed in contact with another contact-spring F3, as

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shown in Figs. 4 and 5. The contact-springs F2 F3 are insulated from the frame A of the clock, the spring F2 being connected with one pole of a primary battery and the spring F3, through the coils of the electromagnet F,with the other pole of the same, said battery being preferably located in the base B of the clock-case, as shown in Figs. 2 and .3, in which the batteryis arranged in a removable drawer B2, that is provided with suitable contactsprings that are electrically connected with the contact-springs F2 F2. lVhenever the contact-spring F2 is pressed against the contact-spring F3 by the action of the fulerumed lever F', the current from the battery will 'flow from one pole otl the same to the contactspring F2, to the contactspring F3, through the coils of the electromagnet vE to the metallic frame A A, and to the other pole of the primary battery, as shown by dotted lines and arrows in Figs. 2 and a. As soon as the circuit of the electric battery is closed the current energizes the electromagnet E, so that the poles of the same attract the armature E' and impart an oscillating motion to it and to its spindle (Z. Vhen the pendulum P swings at full beat, the blockf on the crutch of the pendulum clears the point of the pendant F; but when the beats of the pendulum get gradually smaller the block will not be able to swing clear of the pendant F, but will be engaged by the point of the latter, which drops into the V -shaped recess in the upper part of the block, so that when the crutch arrives in its vertical position the contact-lever F is oscillated on its fulerum, the contact-spring' F2 placed in contact with the spring F2, the circuit of the battery is closed, and the armature attracted by the poles of the eleetromagnet E, so that an impulse is imparted to the pendulum by the oscillating motion of the armature E', as is fully described in my prior patent referred to.

To the spindle d of the crutch C is applied a fixed arm d, to which is pivoted a pawl d2, that engages the main ratchet-wheel G of the going-train of the clock. A eheck-pawl g prevents the ratchet-wheel G from turning in the opposite direction, said check-pawl being pivoted to the supporting-frame of the clock. The cheek-pawl g is curved in such a manner that it 'forms contact with the pawl cl2 when the same is moved with the crutch over the teeth ot the ratchet-wheel G, so as to be lifted out of the teeth and engage on the opposite motion of the crutch only one tooth of the ratchet-wheel for each driving-beat ot the pendulum.

The pivotal connection of the driving-pawl with the arm d forms a kind of toggle-joint movement on the forward motion of the pendulum, and the movement et the pawl is thereby automatically regulated, the stroke ot i's point being always sufficient to move the ratchet-wheel G one tooth, and in case the pendulum makes an excessively long stroke the upward bend of the toggle-joint prevents a correspondingly long stroke of the pawl. \Vhen the pendulum swings too far in the other direction, the driving-pawl d2 will ride up on the cheek-pawl g and will be lifted out vet' engagement with the ratchet-wheel G and prevented from engaging more than one tooth foreach double beat ol' the pendulum. As the driving-pawl (Z2 engages for each double beat of the pendulum one tooth ol' the ratchetwheel G, the latter is thereby moved step by step on its axis and imparts, by an intermediate transmitting mechanism, rotary motion to the arbor of the minute-hand and from the same, by the usual gear-wheel mechanism, to the arbor of the hour-hand. rlhe motiontransmitting mechanism by which the rotary motion of the driving ratchet wheel G is transmitted to the hands differs in some respects from the ordinary gear-wheel transmitting-trains of clock-movements, and is composed of a worm g2, that is placed on the shaft g of the ratchet-wheel G, said worm engaging a worm-wheel g2, that is keyed to a worm-shaft g4, which is supported in suitable neck and step bearings of an auxiliary bracket-plate A2, attached by suitable posts on the front plate A. To the lower end of the worm-shaft g4 is applied a worm g5, which meshes with a worm-wheel g, that is placed loosely on the arbor Q7 of the minute-hand, said worm-wheel ji being pressed by a helical spring g2, interposed between a iixed collar g5 and the hub of a double cam N2, attached to the arbor g?, so that thel arbor of the minutehand can be freely turned Afor the purpose of setting' the hands of the clock, as the loose worm-wheel g cannot transmit the motion of the minute-hand to the transmitting wormgear and driving ratchet-wheel. rlhis is neeessary for the reason that the going-train is not provided with an escapement, as in ordinary cloek-trains, by which the transmittingtrain ot' gear-wheels is prevented from following the motion ot the minute-arbor. lly the loose worm-wheel g and the spring g2 acting thereon the motion of the arbor of the minute-hand is not transmitted to the going-train, while at the same time the number el parts of the going-train are considerably reduced and its construction simplified.

The mechanism so far described Vforms an electrical clock in which the going-train is driven by intermittent electric impulses imparted by a primary battery. In addition to driving the going-train the battery-power is also used for striking the full and half hours. The striking mechanism is composed of three main parts-a striking-wheel H, an elbowshaped striking-arm Il', anda striking-linger H2. The striking-wheel H is keyed to a separate shaft supported in bearings ot' the front plate A and auxiliary plate A2. The striking-arm Il' is pivoted to the shaft of the striking-wheel adjacent thereto, while the striking-nger H2 is fulcrumed to a pin n on the front plate A, as shown in Fig. l0.

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the lower end of the striking-'arm H is pivoted a spring-actuated and double-toothed push-pawl HX, that is moved intermittently into engagement with the teeth of the striking-wheel H. intermittent motion isimparted to the striking-wheel H by a driving-pawl d2, that is pivoted to the arm d on the pivotpin d adjacent to the driving-pawl d2, the driving-pawl d2 being made broader at its lower end, so as to extend over the strikingarm H', the striking-wheel H, and the strikingiinger H2, as shown in Fig. 9.

The circumference of the striking-wheel H is divided into a number ot' groups of teeth corresponding to the number of strokes ot the clock from one to twelve, said groups of teeth consisting of one, two, and so on up to twelve teeth, each group being separated from the next adjacent group by a recess that is formed by removing one tooth, so that when the striking-wheel H is turned entirely on its axis, which takes place once in every twelve hours, all the hours have been struck by the striking mechanism. The teeth ot' the strikingwheel H are engaged by a doubletoothed check-pawl H3, which is fulcrumed to the front plate A, and the upper end of which acts, when lifted by the teeth of the strikingwheel, on a contact-spring h2 so as to press the same against a second contact-spring 7L", that is attached to the front plate A and insulated from the same. The check-pawl H2, like the push-pawl HX, is double-toothed, so as to be always in engagement with one ot the teeth of the striking-wheel H. The contact-spring h4 is electrically connected with .one coil of an electromagnet M, that is supported on a bracket at the lower part of the supporting-plate A, the other coil ot which is connected with the main wire that passes from the battery to the contact-spring F2, as shown in Fig. et. The contact-spring h3 is attached without insulation direct to the metallic front-plate A of the frame, and thereby electric connection made through the same and the other main wire with the other pole of the battery.

The armature M of the electromagnet M is pivoted at one end to the front plate A and attracted by the poles ot' the electromagnet M whenever the double-toothed check-pawl H3 is actuated by the teeth of the strikingwheel H, so that the contact-springs h2 It* are placed in contact with each other and thereby in circuit with the battery. The tree end ot the armature M engages by a pin m a short arm m of a spring-pressed striker M2, that is pivoted to the front plate A sidewise ot the electromagnet E, as shown in Fig. a, and that gives a quick blow on a spiral gong M3, which is mounted on the face-plate B, as shown in Figs. 2 and 3.

Below the lower end ot' the striking-arm H is arranged a V-shaped piece l, which is tulcrumed to the front plate A and which is acted upon by a spring t, that presses one arm ot the V-shaped piece I against the arbor g2 of the minute-hand. One arm of the V- shaped piece l is acted upon by a cam-pin t2 on the arbor Q7, which pin is located diametrically opposite to an actuating-cam t' on said arbor, as shown in Fig. 6. The cam-pin t2 presses, whenever the full hours are to be struck, on the adjacent arm of the V-shaped piece l, so that its other arm clears the lower end ot the striking-arm H, as shown in Fig. 8, and permits it to be moved in downward direction by the tension of its spring h5 until arrested by a stop-pin 7L on the front plate A. lVhen the striking-arm H is placed in this position, a tooth t at its upper end is placed in line with the second tooth of that group of teeth on the striking-wheel corresponding to the hour to be struck. In this position ot the striking-arm H the full hours are struck without interference by the upper end of the striking-arm by the action of the do Libie-toothed pawl HS on the contact-springs 7b3 h4 and the striking mechanism placed in electric circuit with the same.

To the arbor n of the striking-finger H2 is attached a downwardly-extending wire arm N, which is curved at its lower end and placed in engagement with the double cam N2 on the arbor of the minute-hand Q7. The double cam N2 is provided with shoulders n2 at diametrically opposite points, as shown in Figs. at and lO, which shoulders act on the lower end of the arm N at intervals of every half-hour, so as to raise the arm N, together with the striking-linger H2 and by the latter the driving-pawl cl2, out of engagement with the teeth on the striking-wheel and with the upper end ot the striking-arm H. The striking-finger H2 has an enlarged or bulging portion a back of its outermost end or point, over which bulging portion the driving-pawl moves to and fro with the beats of the pendulum until the lower end of the arm N is permitted to drop again at the end of the halt-hour by passing over one of the shoulders n2. The striking-finger H2 is provided with a laterally-projecting pin nx, that engages with a notched wheel N, which is keyed to the hub of the spur-wheel G of the goingtrain, as shown clearly in Figs. 9 and l0.

The wheel N is provided with notches in its circumference, into which the pin nx drops whenever full hours or halt-hours are to be struck. The notches on the wheel N are separated by unnotched portions,which are madc of such a size that it takes three full beats ot the pendulum before the pin nx drops into the next notch. By making the unnotched portions of the wheel greater or smaller it takes either a greater or a smaller number ot' beats ot the pendulum until the pin fax drops into the next notch. The notched wheel N serves for the purpose of imparting a slow stroke to the striking mechanism. If the notched wheel N were not provided, the striking mechanism would be operated with every alternate beat of the pendulum when striking full hours, as a stroke would be given with IOO IIO

every alternate beat of the pendulum which would produce a too quick succession of strokes, especially when short pendulums are used, as in mantel-clocks. Any desired interval of time may thus be obtained between the strokes by varying the size of the unnotched portions or, in other words, the distance between the notches of the wheel N.

The strokes for the full or half hours are produced when the lower curved end of the arm N drops over the shoulder n2 of the cam N2 onto the thinner portion of the cam, in which case the striking-linger H2 is likewise dropped in downward direction, so that its pin nx is located for two single beats ef the pendulum in one of the notches, but during the other four single beats on the next adjacent unnotched portion of the wheel N, so that the driving-pawl d3 cannot engage the teeth of the striking-wheel, and that consequently a stroke is given at every third double beat of the pendulum.

Vhen a full hour is to be struck, the drivingpawl (Z3 engages successively all the teeth of a group on the striking-wheel H until it drops into the next recess. After the full hour is struck the striking-arm H is in the position shown in Fig. S, while the push-pawl HX, pivoted to its lower end, is moved out of engagement with the teeth of the striking-wheel by a pin hX on the front plate A. Shortly after the full houris struck the cam Ngraises the arm l and the striking-linger H2 again, so that the driving-pawl d3 is lifted by the bulging portion of the striking-finger N into raised position, so that during its to-and-fro motion it is out of engagement with the teeth of the striking-wheel H. Before this lifting action takes place the driving-pawl cl3 moves to and fro in one of the recesses between the groups of teeth on the striking wheel H. lVhen the half-hour is to be struck, the cam t' on the arbor gT forms contact with the lower end of the striking-arm H and produces thereby the lifting of the same, so that the tooth t at its upper end is moved sidewise of one of the recesses between the groups of teeth on the striking-wheel H, as shown in Fig. (5. Simultaneously therewith the push-pawl H is returned into engagement with the teeth of the striking-wheel H, and then the arm N of the striking-finger H2 is dropped into one of the depressions of the double cam N2, so as to enable the broad end of the drivin g-pawl d to drop on the next backward beat of the pendulum into the notchv of the striking-arm H and to move by the forward beat of the pendulum the striking-arm H, together with the strikingwheel H, which is engaged by the push-pawl H for the distance of one tooth. The striking-wheel H raises by this motion the doubletoothed cheek-pawl H3, which actuates the contact-sprin gs h3 77,L and produces thereby the striking of the half-hour. While the upper end of the striking-arm H is moved, its lower end is'raised and engaged by the V-shaped piece l, which is pushed by its spring t" under the lower end of the striking-arm H', so as to hold it in position and prevent the drivingpawl d3 from engaging any one of the teeth of the striking-wheel, as during the following beats of the pendulum the drivng-pawl moves to and fro on the cam-shaped portion of the upper end of the striking-arm H until the strikin g-iinger H2 is again raised by the double cam N2 and the driving-pawl lifted out of the notch of the striking-arm H. ln this position of the striking-arm H the latter is ready to drop down again on the pushing away of the V-shaped piece l from below the lower end ofthe striking-arm, so as to permit it to strike the full hours.

f After all the strokes of the full hours are struck the notched wheel N continues to act for a short time on the striking-finger H2 and driving-pawl (Z3, and alternately raises and drops them until the striking-finger H2 is lifted again by its cam N2 and thereby the driving-pawl (Z5 placed out of engagement with the teeth of the striking-wheel and the tooth on the striking-arms H. Before the lifting of the driving-pawl (Z3 by the strikingfinger HL the driving-pawl cl3 moves to and fro in the recess between the group of teeth of the full hour without exerting any action on the striking mechanism. The striking mechanism produces thus not only the effective striking ef the full hours, but also the striking of the half-hours. The single stroke for the half-hour and the slow succession of strokes for the full hours on the gong is similar to the striking of the half and full hours in ordinary clocks, so that a clock is obtained that has all the characteristics of ordinary spring or weight driven clocks, but the advantage that the winding is dispensed with and the going power as well as the striking mechanism operated by the electromotive force of the battery. rlhe battery employed is preferably a so-called dry battery, which is renewed from time to time when it has run down. The movement is composed of a much smaller number of parts, as in ordinary springclocks, as there is a smaller number of gearwheels required, whereby this movement can be made smaller and cheaper, so that the clock can be placed in competition even with the ordinary spring-clocks in general use.

Having thus described my invention, l claim as new and desire to secure by Letters Patentl. In an electric clock, the combination with an oscillating pendulum and its crutch, of a main ratchet-wheel for the going train, an arm on the spindle of the crutch, a drivingpawl pivoted to said arm, and a curved checkpawl arranged ad jacent to and underneath said driving-pawl, said driving-pawl riding over said check-pawl so as to engage one tooth only of the ratchet-wheel at each driving beat of the pendulum, the pivot of the pawl on the arm causing a toggle action on an excessive IOO IIO

stroke of the pendulum which prevents said pawl from pushing the ratchet-wheel more than one tooth.

2. In an electric clock, the combination of an oscillating pendulum, a crutch actuated thereby, a striking-train, the striking-wheel of which is provided with groups of teeth for striking the hours, and with intermediate recesses between said groups of teeth, a striking-arm provided with a tooth for striking the half-hours, means for actuating said strikingarm to bring its tooth opposite said recesses, means connected with the pendulum for operating the striking-wheel for striking the hours, means connected with the arbor of the minute-hand for actuating the striking-arm to operate the striking-wheel for striking the half-hours, a double-toothed check-pawl engaging the teeth of the striking-wheel, and a striking mechanism operated by said checkpawl.

3. In an electric clock, the combination of an oscillating pendulum, a crutch actuated thereby, a striking-train, the striking-wheel of which is provided with groups of teeth for striking the hours and with intermediate recesses between said groups of teeth, a striking-arm provided with a tooth for striking the half-hours, means for actuating said strikingarm to bring its tooth opposite said recesses, means connected with the pendulum for operating the striking-wheel for striking the hours, means connected with the arbor of the minute-hand for actuating the striking-arm to operate the striking-wheel for striking the half-hours, a double-toothed check-pawl engaging the teeth of the striking-wheel, and an electric striking mechanism operated by said check-pawl.

4. In an electric clock, the combination with an oscillating pendulum and its crutch, operated intermittently by electric impulses, of a striking-wheel provided at its circumference with groups of teeth and intermediate recesses between said groups of teeth, a driving-pawl engaging the teeth of the strikingwheel, a striking-arm pivoted to the shaft of the striking-wheel and provided with a single tooth and a cam-shaped portion at its upper end, a fulcrumed striking-fin ger, a doubletoothed push-pawl pivoted to the lower end of the striking-arm, a cam for actuating said striking-arm and push-pawl, and means for locking the striking-arm in raised position for permitting the striking of the half-hours by the position of the tooth on the striking-arm adjacent to the recesses between the groups of teeth, substantially as set forth.

5. In an electric clock, the combination with an oscillating pendulum and its crutch, of a driving-pawl, a striking-train the main wheel of which is provided with groups of teeth and intermediate recesses between said groups of teeth, a striking-arm pivoted to the shaft of the striking-wheel, and provided with a single tooth and a cam-shaped portion at its upper end, means for retaining the strikingarm in raised position, a cam-piu on the minute-arbor for releasing the retaining-piece, a striking-finger fulcrumed to the frame and provided with a downwardly-extendiug arm, a double cam on the minute-hand arbor engaging said arm, a notched wheel placed on the arbor of the going spur-wheel and a striking-finger provided with a pin that drops into the notches of said wheel for permitting the striking of the full hours with slow or retarded strokes, substantially as set forth.

G. In an electric clock, the combination, with an oscillating pendulum and its crutch, of a drivingpawl for the striking train broader at its lower end, a striking-wheel provided with groups of teeth at its circumference and intermediate recesses between said groups of teeth, a striking mechanism operated by said striking-wheel, a striking-arm pivoted to the shaft of the striking-wheel, a double-toothed push-pawl pivoted to the lower end of the striking-arm, a cam on the minute-arbor engaging the lower end of the striking-arm, and a strikin g-fin ger fulcrumed to the frame and provided with a downwardlyextending arm, a double cam on the minutearbor engaging said arm, the broader lower end of the driving-pawl engaging intermittently the striking-wheel and striking-arm for producing the striking of the full and half hours, substantially as set forth.

7. In an electric clock, the combination, with an oscillating pendulum and its crutch, of a driving-pawl at its lower end, a strikingwheel of which is provided with groups of teeth at its circumference and intermediate recesses between said groups of teeth, a striking-arm pivoted to the shaft of the strikingwheel and provided with a single tooth and a cam-shaped portion at its upper end,a springactuated push-pa-wl pivoted to the lower end of the striking-arm, a fulcrumed and springactuated V-shaped piece engaging intermittently the lower end of the striking-arm, a cam on the minute-arbor, a cam-pin on said arbor diametrically opposite to said cam, said cam and cam-pin engaging respectively the lower end of the strikingarm and the V- shaped piece of the same for setting the parts in position for striking respectively half and full hours, substantially as set forth.

8. In an electric clock, the combination, with an oscillating pendulum and its crutch, of a driving-pawl, a striking-train consisting of a striking-wheel having groups of teeth at its circumference, and intermediate recesses between said groups of teeth, a striking-arm pivoted to the shaft of the striking-wheel, a striking-finger fulcrumed to the frame and provided with a downwardly-extending arm, a double cani for dropping the striking-finger every ralf-hour, a notched wheel on the arbor of the main ratchet-wheel of the going train and a pin on the striking-finger adapted to drop intermittently into the notches of the notched wheel, said striking-finger being provided with an enlarged or bulging portion for IOO IIO

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raising the driving-pawl out of engagement with the striking-Wheel and striking-arm,substantially as set forth.

9. In an electric clock, the combination, with an oscillating pendulum and its crutch, of a driving-pawl having a broad lower end, a striking-train consisting ofa striking-wheel, a-striking-arm pivoted to the shaft of said striking-wheel,an electrically-operated striking mechanism, means for operating said striking mechanism by the striking-wheel, a spring-actuated push-pawl pivoted to the lower end of the striking-arm, a pin for arresting the downward motion of the strikingarm, and a pin for engaging the double-pointed push-pawl and withdrawing it from the teeth of the striking-wheel preparatory to striking the full hours, substantially as set forth.

l0. In an electric clock, the combination with an oscillating pendulum and its crutch, of a striking-train composed of a strikingwheel having groups of teeth at its circumference and intermediate recesses between said groups of teeth, a striking-arm pivoted to the shaft of the striking-wheel, a strikingfinger I'ulcrumed to the frame and provided with a downwardly-extending arm, a double cam on the minute-arbor for actuating the striking-finger, and a double-toothed checkpawl engaging the teeth of the striking-wheel, a circuit-closing device actuated by said check-pawl, a driving-pawl pivotcd to an arm on the crutch and being made broad enough to extend over the striking-wheel, striking-arm and striking-finger, a notched wheel on the arbor or" the main ratchet-wheel of the going train, said wheel being provided with notched and unnotched portions, a pin on the strikingfinger adapted to drop into the notch and move over the unnotched portions ofthe striking-wheel, a V-shaped piece engaging the lower end of the striking-arm, and a cam-pin on the minute-arbor for moving said V -shaped piece clear ofthe lower end of the strikingarm, i'or permitting the striking of the full hours at a slow stroke by the joint action oi' the striking-wheel, striking-arm and strikin g-finger on the drivin g-pawl of the strikin train, substantially as set forth.

In testimonyT that I claim the foregoing' as myinvention I have signed my name inprcsence of two subscribing witnesses.

SIGISMUND FISCHER.

Witnesses:

PAUL GoErnL, Guo. W. Jknnnn.

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