US638160A - Electric clock. - Google Patents

Description

No. 638,l60. Patented Nov. 28, i899.

H..E. ANDERSSUN.

ELECTRIC CLOCK.

(Application filed Feb. 16, 1899.) (No Model.) 5 Sheets-Sheet l.

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no. 638,!60. Patented Nov. 28, I899. H. E. ANOERSSUN.

ELECTRIC CLOCK.

(Application filed Fab. 16, I899.) (Nu Model.) 5 Shea'ts$heat 2.

No. 638,l60. Patented Nov. 28, I899.

H. E. ANDERSSUN.

ELECTRIC CLOCK.

(Applicltion filed 101:. 16, 1899.) (no Model.)

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No. 638,|60. Patented Nov. 28, I899.

.H. E. ANDERSSON.

ELECTRIC CLOCK.

(Application fiked Feb. 16, 1899) 5 Sheats-Sheet 4.

(No Model.)

m mama" 1 Patented Nov. 28, I899. a. E. ANDERSSON.

ELECTRIC CLOCK. I,

(Application filed Feb. 16, 1899.) (I 01 IQME.) 5 ShaetsSheet 5,

ilwifrnn STATES PATENT QFFICE- I-IJALMAR EMANUEL ANDERSSON, OF STOOKHOLH, SWEDEN.

ELECTRIC CLOCK.

SPECIFIOAT] ON forming part of Letters Patent No. 638,160, dated November 28, 1899.

Application filed February 16, 1899- Serial No. 705,711. (No model.)

To all whmn it may concern:

Be it known that I, HJALMAR EMANUEL AN- DERSSON, clock and watch maker, of Stockholm, Sweden, have invented certain new and useful Improvements in Electrical Clockwork; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to figures of reference marked thereon, which form a part of this specification.

My invention has relation to clocks; and it has for its object the provision of means for periodically and automatically winding up the motor-spring for the time mechanism.

It has for its further object the provision of means for electrically operating the striking appliances, and thereby dispensing with the spring usually employed for the strikingtrain, the electrical appliances for operating the striking mechanism serving at the same time as a means for periodically winding up the motor-spring for the time mechanism, so that a comparatively short spring can be used and compactly arranged in the clock-framing, said spring occupying an exceedingly small space as compared with the space required for the usual striking-train spring.

The invention has for its further object a construction whereby the clock mechanism is materially simplified; and, finally, my said invention has for its object certain improvements in parts of the clock mechanism, whereby their construction is materially simplified and their eliiciency increased.

That my invention may be fully understood, I will describe the same in detail, reference being bad to the accompanying drawings, in which- Figure l is a front elevation of a clock mechanism constructed and organized for operation in accordance with my invention. Fig. 2 is an elevation thereof, showing the mechanism in rear of the forward frame-plate, which latter is removed, together with the mechanism in front thereof. Fig. 3 is a rear elevation of the mechanism arranged in front of the forward frame-plate. Fig. i is a rear elevation of the clock mechanism, the vertical arm or extension of the console or bracket which is designed to support said mechanism and to be secured to the clock-casing being shown in dotted lines. Figs. 5 and 6 are opposite side elevations. Figs. 7 and 8 are detail views. Fig. 9 is avertical section of the circuit-breaker; and Fig. 10, a cross-section thereof on line A B of Fig. 9, just above the circuit-breaker proper. Fig. 11 is a detail perspective view of the hammer-operating mechanism and the appliances for controlling the operations thereof, the lower portion of the lever 40 being broken 0% to more clearly show the contact-plate 54, and for the sake of clearness the clock- frame plates 3 and 4 are omitted. Fig. 12 is a fragmentary top plan view ofthe mechanism shown in Fig. 11, the clock- frame plates 3 and 4 being shown in dotted lines; and Fig. 13 is a sectional view drawn to an enlarged scale and taken about on line a b of Fig. 1.

In the mechanically and electrically operated clock to be described there is a circuit maker and breaker in the primary circuit of an electromagnet and in a normally-closed relation to said circuit, said circuit maker and breaker being controlled by the armature of the electromagnet, and in said circuit is also included a circuit-closer controlled by the escapemcnt to close the main circuit through the electromagnet and circuit breaker at each revolution of the escapemcntwheel, thereby oscillating the armature in one direction to partly wind up the motorspring of the time-train through intermediate mechanism and at the same time interrupt the main circuit, for purposes hereinafter described, the arn'iature swinging back to a normal position and at the same time reopening the main circuit through the circuit-breaker. There is a third circuit-closer in a branch or shunt from the main circuit, operated by the let-off cam of the striking mechanism, for purposes hereinafter set forth, and a fourth circuit-closer in a shunt from the main circuit for maintaining said circuit and the first mentioned shuntcircuit closed when the striking-mechanism-circuit closer opens the circuit, for purposes to be described. Now

in order to distinguish these circuit making and breaking devices other than by referencesymbols, and particularly in the claims, I will refer to the first-named device as the primary-circuit breaker, to the second as the time-circuit closer, to the third as the striking-circuit closer, and to the fourth as the auxiliary-circuit closer.

The clock mechanism is carried, as usual, by two frame-plates 3 and 4:, which will hereinafter be referred to as the forward and rear frame-plates, respectively, said plates being secured together, as usual, by spacingpillars 3, and said frame is secured to the horizontal arms 74 of a console or bracket 74 by means of screws 61. To the vertical arm or extension 74 of the bracket 74; is secured a gong, or, as shown in Fig. 4:, a soundingspring 60. The frame- plates 3 and 4 have the form of an inverted T--that is to say, they have an upper portion the diameter of which is considerably less than that. of the lower portion of said plates. To the upper edge of the forward frame-plate 3 is secured a cross piece 75, which carries two electromagnets 1 and 1, one on each side of the narrower upper portion of said frame-plate, the pole-shoes of which electromagnets are likewise secured to the wider portion of said plate by means of screws 76, Fig. 1. Between the two electromagnets 1 and-1 and supported in a ring or rings secured to frame-plate 3 is arranged the primary-circuit breaker, which may be of any well-known construction. I prefer, however, to use the circuit-breaker17, (shown in Figs. 1, 9, and 10,) which consists of a vessel 17, preferably cylindrical and made of glass, of two glass tubes 17, secured fluid-tight in the heads of the vessel, so as to leave a narrow slit between them within said Vessel, and of an arbor l7, stepped in the latter and projecting through its upper head and carrying at its outer end a bifurcated lever 32, whose arms 32 and 32 are acted upon by an armature, said shaft also carrying a cut-off 30 in the form of a thin plate of insulating material, preferably of mica, so located on the arbor 17 as that when the latter is rocked in one direction the cut-off 30 will interrupt the continuity of a body of mercury 17 in tubes 17, so as to break the electrical connection be tween the leads 16 and 18 and to reestablish said connection when arbor 17 is rocked in an opposite direction. The described circuitbreaker is fully shown and described in Letters Patent of the United States granted to me April 11, 1899, No. 622,657, and its advantages are therein fully set forth and need therefore no further reference herein.

As shown at Fig. 1, the pole-shoes 1 and 1 ofthe electromagnets 1 and 1, respectively, are extended downward and have a concave recess in their proximate faces, and on an arbor 5 is loosely mounted an armature 2,

secured a rod 33, that extends through an oblong opening in the forward frame-plate 3, with its free end between the arms 32 and 32 of the bifurcated lever 32 on the arbor 17 of the circuit-breaker 17, Fig. l, and said armature-arm 2 also carries a pawl 27. As stated, the armature 2 is loosely mounted on an arbor 5, which has secured to its forward end, in front of forward frame-plate 3, a pinion 48, Fig. 1, and to its rear end, back of the rear frame-plate 4, a hanuner-actuating disk 50, having hammer-lifting pins projecting from its front face. As shown in Figs. 2 and 7, the arbor 5 has, furthermore, secured thereto, between the armature 2 and the back of the forward frame-plate 3, a ratchet-wh eel 28, engaged by the aforesaid pawl 27 on the arm 2 of said armature and by a check-pawl 29, carried by said frame-plate. On arbor 5, back of the armature 2, is loosely mounted a barrel 21, to the forward end of which is secured a ratchet-wheel 25, which in practice may be formed integral with said barrel, as shown in Fig. 7, engaged by a check-pawl 26 on a cross-rod 26. In rear of the barrel 21 are loosely mounted on said arbor 5 a gearwheel 22 and a pinion 22, which is preferably formed integral with wheel 22. The latter wheel gears with a pinion 22 on the arbor 6, which carries the escapemeut-wheel 8, and the pinion 22 meshes with a gear-wheel 22 on the arbor 641, which carries the usual hour and minute hand sleeves.

The anchor 9, which controls the escapement-wheel, is secured to an arbor 7, that receives its oscillating movements from a pendulum in the usual manner, said arbor 7 also carrying a conductive sleeve 12, insulated therefrom and having secured thereto two contact-springs 11, that project into the patlt of a contact-pin 10, projecting from the rear face of the escapement-wheel 8 and constituting the time-circuit closer.

On the aforementioned barrel 21, as shown in Fig. 7, is wound the motor-spring 20 for the time mechanism, one end of said spring being secured to the forward end of said barrel and the other to the gear-wheel 22. \Vithin the barrel 21 the arbor 5 has a circular flange or collar 5, which forms an abutment for a disk 23, between which and the opposite end of the barrel is arranged a spring 24, coiled about the arbor, the power of which spring is sufficiently great to lock the barrel to the arbor by frictional resistance during the winding up of the motor-spring 20, which frictional resistance is, however, overcome whenever said motor-spring is wound up to excess, thus allowing the arbor 5 to revolve independently of said barrel, so that a breakage of the motor-spring is effectually guarded against.

From the described arrangement of motorspring and in view of the fact that said spring drives the time mechanism only it will be seen that a comparatively short spring, taking up but very little space, can be made use of.

IIO

In the normal position of the arn'lature 2 that is to say, in the position it occupies when the electromagnets are demagnetized-the arm 33 on armature-arm 2 holds the arm 32 on arbor 17 of the circuit-breaker 17 in such a position that the cut-off 30 will not interru pt the continuity of the column of mercury 17 in the tubes 17 thereof.

The sleeve 12, hereinabove referred to, on the arbor 7, which carries the anchor of the escapement-wheel, is included in the circuit of a suitable electric generator, as a battery 13, (diagrammatically illustrated in Figs. 1, 2, and 4,) in which circuit are also included the electromagnets 1 and 1 and the terminals 16 and 18 of the described circuit-breaker.

The electric circuit is normally open, but normally closed through the circuit-breaker 17, and as the escapement-wheel 8 rotates and its contact-pin makes contact with the springs 11 on sleeve 12 on the anchor-arbor 7 the electric circuit will be closed, current flowing from battery 13 through wire 1%, electromagnet 1, wire 15, electromagnet 1, wire 16, column of mercury 17 of circuitbreaker 17, wire 18, clock-frame, escapement-wheel arbor 6, escapement-wheel 8, its contact-pin 10, contact-springs 11 of sleeve 12 on anchorarbor 7, and wire 19 back to battery 13.

The closure of the electric circuit produces the following results, to wit: The armature 2 is attracted, and thereby caused to make a partial revolution on arbor 5, which is transmitted, through the pawl 27 on armature-arm 2, to the Winding-ratchet 28, and as the barrel 21 is locked to the arbor 5 by the described friction-clutch said barrel will revolve with said arbor, and in view of the fact that one end of the motor-spring 20 is secured to the barrel 21 and the other end of said spring to the gear 22 the spring will be partly wound up, which operation, as will be readily understood, takes place at each complete revolution of the escapement-wheel 8.

The distance between the arms 32 and 32 of the bifurcated lever 32 on the cut-01f arbor 17 of the circuit-breaker 17 is such that as the armature is rocked magnetically on the closure of the electric circuit, as above described, the arm 33 on the arm 2 of said armature will impinge upon the arm 32 of said lever 32 and turn the cut-off arbor 17 of the circuit-breaker 17, so as to move the cut-off 30 in the space between the two tubes 17 and destroy the continuity of the column of mercury in said tubes, and thereby interrupt or open the electric circuit, the arrangement being such that this will take place a little before the contact 10 moves clear of the contact-springs 11.

The opening of the circuit has for its result the demagnetization of the electromagnets, the return of the armature 2 under the action of its weight 34 into its normal position, and the closure of the electric circuit through the circuit-breaker 17 by the action of the rod 33 on the armature-arm 2 on the arm 3 of the bifurcated lever 32 on cutoff arbor 17, whereby the latter is turned and the cut-off 3O moved to restore the continuity of the column of mercury 17 in the tubes 17 of the circuit-breaker 17.

As is well known, the armature of an electromagnet receives a very sudden impulse whenever said electromagnet is energized, and to obviate sudden shocks on the arms 32 and 32 of the cut-off arbor 17 of the circuitbreaker I secure to the hub of the armature a radial arm terminating in a toothed sector 37 in gear with a pinion 3S on an arbor 38, carrying a governor or fly 38, Figs. 2, a, and 5.

One of the important points of my invention lies in the form of the anchor-pallets, so as to red nee the contacting surfaces between said pallets and the teeth on the escapementwheelto a minimum, and therebycorrespondingly minimize the frictional resistance in order to avoid a stoppage of the escapementwheel when the pin 10 thereon is in contact with the springs 11 on sleeve 12 and the electric circuit is closed. To this endl construct the anchor-pallets in the form of arcs of a circle, having for center the axis of oscillation of the anchor 9, as shown in Fig. 3, so that the forward face of one escapement-tooth 36 will have bearing on the concave face of one of the pallets 35, and as the latter swings out and the pallet 35 swings in to engage another tooth 30 on the escapement-wheel the forward face of the latter will have bearing on the convex face of said pallet 35. Furthermore, the teeth on the escapementwheel 8, as more clearly shown in Fig. 8, have their outer faces inclined in a direct-ion opposite to the direction of rotation of said wheel, while the body of the teeth is made tapering inwardly, so that the contact between teeth and pallet is a mere l.ine-namely, at the op posite edges of the beveled faces of the teeth. Furthermore, the contact-pin 10 and contactsprings 11 are so arranged as to make contact at the moment when a pallet of the anchor engages a tooth on the escapement-wheel that is to say, during the momentary stop of the eseapement-wheel Fig. S- thuS insuring a perfect contact and closure of the electric circuit, inasmuch the contact-pin it) remains in contact with the springs 11 for a certain length of time,although this is very short, yet sufficiently long to engender magnetic resistance at the contacts on the closure of the electric circuit, and to minimize this rcsistance the electric circuit is opened, as hereinabove stated, before said contacts move clear of each other and at the moment an anchorpallet moves out of contact with a tooth on the escapement-wheel, so that a stoppage of the latter cannot occur.

The striking mechanism is operated electrically. Hence the spring usually en'iployed for driving the strikingtrain is dispensed with.

The arbor 0 1, as shown in Figs. 1 and 3, can rics at its forward end, in front of the forward frame-plate S, the usual minute and hourhand sleeves, and to the former is secured a pinion 66, meshing with a pinion 67 on an arbor 68, which carries a pinion 69, meshing with a gear 70 on the hour-hand sleeve, which latter also carries a snail 39 of well-known construction.

On the rear face of the pinion 66 is formed a helical projection, constituting the let-off or striker-cam 42, on the helical face of which trails a pin 43, projecting from the end of an arm 43 of a lever 43, pivoted on a vertical pin in a stud 43, secured to the front face of the forward frame-plate 3, the arm 43" of said lever being bifurcated and straddling the forward end of an arbor 47, which has endwise motion in its bearings in the frame- plates 3 and 4, said arbor having a collar, which forms an abutment for one end of a spring 46, coiled about the arbor, the opposite end of which spring has bearing on the rear face of the forward frame-plate and tends to hold the arbor in a normally-retracted position.

To the outer end of arbor 47 is secured a lever 40, which has bearing on the bifurcated end of lever45, said lever 40 havinga toothed segment 40 at its free end, adapted to gear with the pinion 48 on arbor 5, hereinabove referred to, said lever 40 being also provided with a Weighted arm 41, Figs. 1, 5, and 6.

To the lever 40 is secured a contact-pin 55, adapted to trail over a segmental contact 54, secured to, but insulated from, the forward frame-plate 3, said contact-plate 54 having a hole, in which is secured an insulating-sleeve 57 for the reception of said contact-pin when the lever 40 is in a normal retracted position, said parts constituting the time-circuit closer.

From what has been said it will be seen that the lever 40, under the stress of its spring 46 on arbor 47, draws the bifurcated arm 43 toward the forward frame-plate 3, and consequently holds the arm 43 of said lever 43 away from said plate, and the pin 43 on said lever-arm 43 against the helical face of cam 42, as shown in Fig. 3. Above the arbor 47 and on the snail side of lever 40 is arranged an arbor 44, which also has endwise motion in its bearings in the frame- plates 3 and 4 and carries a collar that forms an abutment for one end of a spring 44, whose opposite end has bearing on the front face of rear frameplate 4 and tends to hold said arbor projected forwardly in the path of lever 40 and acts as a stop therefor.

To the rear end of arbor 44, back of the rear fran'le-plate 4, is secured a radial arm 49, bifurcated at its free end and straddlinga sleeve 70", loose on a stub-arbor 71, projecting from the rear face of the frame-plate 4. To the sleeve 70 is secured a radial arm 72, adapted to be moved into the path of the hammer-lifting pins 50, projecting from the front face of disk 50 on arbor 5, hereinbe'fore referred to and as more clearly shown in Figs. ll and 12. On stub-arbor 71 is loosely mounted a sleeve 53, to which are secured the hammer-rod 53 and an arm 51, that projects forwardly over the lifter-arm 72 on sleeve 70 As hereinabove stated and as more clearly shown in Figs. ll to 13, the lever 43 carries a pin 43 on its arm 43, which pin is held against the cam or helical face of the let-off cam 42 by the stress of the spring 46 on arbor 47 acting on lever 40 to draw the same inwardly or toward the front frame-plate 3. As said cam revolves, the lever 43, whose bifurcated arm 43 straddles the arbor 47 in rear of lever 40, gradually draws the latter forwardly against the stress of the spring 40 until the aforesaid pin 43 has reached the widest part of the helical face of the let-off cam 42 and is about to drop onto its narrowest part. At this moment the contact-pin 55 has cleared its insulating-sleeve 57,and the lever 4(),which acts as a circuit-closer, swings toward the snail 30 until its weighted arm 41 comes to rest on one of the steps of the snail. After contact-pin 55 on lever 40 moves out of its sleeve 57 said lever will also be beyond or clear of the outer end of the arbor 44, and as soon as the lever swings toward the snail the spring 46 on its arbor 47 draws said lever rearwardly, thereby moving the arbor 44 in a like direction against the stress of its spring 44. This rearward movement of the arbor 44 causes the radial arm 49 thereon to move the sleeve in a like direction, thereby ll'lOVlllQ, the hammer-lifting pin 72 into the path of the pins 50 on disk 50, secured to arbor 5. Furthermore, as the lever 40 swings toward the snail 39 and is during this movement drawn rearwardly by the spring 46, the toothed secfor is brought into gear with the pinion 48 on the aforesaid arbor,while the contact-pin 55 is moved into contact with the segmental plate 54. At this moment the electric circuit is closed, the contact-pin 55 on lever 50 hearing on segmental contact 54,]1ereinabove referred to, and current from battery 13 will flow through wire 14, electromagnet 1, wire 15, electromagnet 1, wire 16 to column of mercury in circuit -breaker 17, wire 18, clock frame and mechanism, lever 40, contacts 55 54, and wire 56 back to battery 13. On the closure of the electric circuit the electromagnets are energized and the armature 2 caused to make a partial revolution,which, as hereinbefore described, is transmitted to arbor 5 and to the hammeractuating disk 50 thereon, causing the hammer 52 to strike and at the same time partially winding up the motorspring 20. As the armature oscillates, its arm acts upon arm 32 of the circuit-breaker to interrupt the circuit, as before described, the armature 2 swinging back and establishing the circuit again through the circuit-breaker, as hereinbei'ore explained, these operations being repeated so long as the pin 55 on lever 40 remains in contact with the contact-plate 54. It will, however, be observed that the lever 40 is in gear with the pinion 48 during the described operations, so that at each partial rotation of said arbor the lever will be moved a certain l istauce away from the snail, or toward its normal position, until it has cleared the arbor 44, at which moment the contact-pin 55 on the lever will be in register with the sleeve-bearing 57in contact 54, thus allowing the spring at to retract the lever, while the arbor at is projected forwardly, thereby moving the sleeve '70 through the arm 49 in a like direction and withdrawing the radial arm '72 from the path of the lifter-pins 50 on disk 50, the parts being again in their normal position, as hereinbefore described.

It is obvious that the number of strokes of the hammer 52 will depend upon the length of time the contact-pin 55 remains in contact with the contact-plate 54, and it is further obvious that this is determined by the snail 39, since the greater the amplitude of the throw of lever 40 toward said snail the longer will said contacts remain in contact.

To the hammer-rod 53 and to the rear frameplate 4 are secured the opposite ends of a spring 80, (see Figs. 4, 5, 6, 11., and 12,) which spring tends to draw said rod down to the sounding-spring 60, so that as said rod is lifted by the pins 5O on disk 50 and again released the spring 80 acts to suddenly draw the rod down onto said sounding-spring (50, thus materially increasing the force of the blow. In order that the hammer may not remain in contact with the sounding-spring after delivering a blow, and thereby damp or muffle the sound, I provide a resilient stop 81, projecting from the rear face of the back frame-plate 4 under said hammerrod, which stop 81 yields under the blow of the hammer, but immediately recovering holds said ham mer clear of the sounding-spring 60. (See Figs. 11 and 12.)

To avoid injury to the contacts 54 55 through sparking whenever the pin 55 is moved over the sleeve 57,1providea shunt-circuit.through which the main circuit is kept closed through the medium of an auxiliarycircuit closer until the parts have returned into their normal positions.

To the front face of the forward frameplate 3 is secured, but insulated therefrom, a conductive plate 58, which carries a contactspring '73 in the path of the rod 33 on the arm 2 of the armature, Fig. 1, so that as said arm swings over to act upon arm 32 of the circuit breaker to interrupt the circuit the shunt-circuit will be momentarily closed into the main circuit through said arm 33, the on rrent flowing from battery 13 through wire 11-, electromagnets 1 1, wire 16, circuit-breaker, wire 18, clock frame and mechanism, armature-rod 33, spring 73, plate 58, and wire 50 back to battery, thus maintaining the main circuit closed through the shunt-circuit during the short space of time required for the armature-rod to swing over and act upon arm 32 of the circuit-breaker to interrupt the circuit, so that sparking at the contacts 54 55 will be avoided.

It will be observed that in the construction described the main time-arbor 6-1:, which carries the minute and hour hand sleeves geared together, also carries the letoff cam (on the minute-hand sleeve) and the snail, (on the hour-hand sleeve,) whereby the clock mechanism is materially simplified, in that the number of its operative elements is greatly reduced.

Having thus described my invention, what I claim as new therein, and desire to secure by Letters Patent, is

1. lhe combination with the time-train of a clock, its let-01f cam and motor-spring, of a striking mechanism controlled by said let-off cam, said striking mechanism organized to partly wind up the time-train spring at each blow struck by the hammer of said striking mechanism, for the purpose set forth.

2. The combination with a time striking mechanism, an electromagnet, its armature, a primary-circuit breaker, a secondary-circuit closer, a suitable electric circuit including said electromagnet, circuit-breaker and circuit-closer, and means operated by the armature and operating the OllC1l1b-l)l6tll(6l and striking mechanism; ofrevoluble devices for controlling the operation of the circuit-closer, a motor-spring for said devices, means for partially winding said spring at each blow struck by the hammer of the striking mechanism, and means for preventing overwinding of said motor-spring, substantially as set forth.

3. The combination with the time-train and striking mechanism o'fa clock, and the motorspring for said time-train; of electrically-controlled appliances for operating the striking mechanism organized to partly windsaid motor-spring at each revolution of the escapement-wheel and at each blow struck by the hammer of the striking mechanism, substantially as set forth.

4. The combination with the time-train and striking mechanism of a clock and the motorspring for said timetrain; of electrically-controlled appliances for operating the striking mechanism organized to partly wind said inotor-spring at each revolution of the escapement-wheel and at each blow struck by the hammer of the striking mechanism, and means for preventing overwinding of the spring, substantially as set forth.

5. The combination with the time mechanism of a clock, its actuating-spring, a winding mechanism therefor, a contact on the escapemen t-wheel and a resilient contact on but insulated from the anchor-arbor in the path of the one on the escapement-wheel; of a pair of electromagnets,an oscillating armature therefor mounted loosely on the spring-winding-up arbor, means for transmitting the partial rotary movements in one direction of said armatu re to said winding-arbor, a suitable electric circuit including the electromagnets, the anchor-arbor contact and the clock mechanism, a primary-circuit breaker included in said circuit operated by the armature to open the circuit as it oscillates in one direction under magnetic attraction when said circuit is closed through the escapementcircuit closer and to again open the said circuit through the primary-circuit breaker When said armature swings back to a normal position, for the purposes set forth.

6. The combination of the winding-up arbor, a barrel loosely mounted thereon, the time-mechanism-actuating spring coiled on said barrel and the power-transmitting gear also loose on said arbor, said spring having one terminal secured to said barrel and the other to said transmitting-gear; of a frictioncoupling for coupling the barrel to the arbor, for the purpose set forth.

7. The combination with the time mechanism of a clock, its actuating-spring, a winding-arbor, a barrel loosely mounted thereon on which said spring is coiled, one end of which is secured to said barrel and the other to the power-transmitting gear; of said time mechanism, and a friction-coupling coupling said barrel to said arbor; of electrically-controlled appliances operating to impart a partial rotation to the winding-up arbor (at each revolution of the escapement) in one and the same direction, for the purpose set forth.

8. The combination with the time mechanism of a clock, its actuating-spring, a winding-up arbor for said spring, electrically-perated appliances for imparting to said arbor periodical partial rotary movements in one and the same direction, and a suitable electric circuit including said appliances and the clock mechanism; of a circuit-closer consisting of a contact-pin on the escapement-wheel, and a contact spring or springs projecting from a sleeve on, but insulated from the anchor-arbor, into the path of the aforesaid pin, said sleeve included in the aforesaid electric circuit and said contacts arranged to close the circuit during one of the temporary stops of the escapementwheel, a primary-circuit breaker interposed in said circuit, means for operating the same during said temporary stop of the escapement to open the circuit, and means for subsequently reclosing said circuit through the primary-circuit breaker, for the purpose set forth.

9. The combination with the bifurcated lever 32 on the arbor of the circuit-breaker 17, the electromagnets l and 1, a suitable electric circuit including said magnets, the arbor 5, the armature 2 thereon provided with an arm 33 extending between the arms of the aforesaid bifurcated lever, said armature carrying the toothed sector 3'7, of the arbor 38*, the pinion 38 and governor 38 thereon, said pinion in gear with the sector 37, substantially as and for the purpose set forth.

10. The combination with the time mechanism of a clock, its actuating-sprii'ig, a winding-up arbor for said spring, and mechanism for revolving said arbor in one direction only, a let-off cam on the minute-hand sleeve and a snail on the hour-hand sleeve of the main arbor of said time mechanism; of a striking mechanism, e]ectrically-operated appliances controlled by said cam and snail for operating said striking mechanism and for impartin g a partial revolution to the aforesaid windingup arbor at each blow struck by the hammer, for the purpose set forth.

11. The combination yvith the main arbor of the time mechanism of a clock, the minute and hour hand sleeves on said arbor, a let-off cam revolving with the min ute hand sleeve, a snail revolving with the hour-hand sleeve, a striking mechanism, elcctrically-operated appliances for actuating the same, comprising a revoluble arbor, an armature loose thereon, and means for transmitting the oscillations of the armature to said arbor and revolving the same in one direction only, electromagnet-s for said armature and a suitable electric circuit; of means controlled by the let-off cam for alternately closing and opening the electric circuit to alternately revolve and stop the rotation of the aforesaid arbor, and means controlled by the snail for regulating the number of closures of said electric circuit, for the purpose set forth.

12. The combination with the main arbor of the time mechanism of a clock, the mine ute and hour hand sleeves on said arbor, a let-off cam. revolving with the minute-hand sleeve, a snail revolving with the hour-hand sleeve, a striking mechanism, electricallyoperated appliances for operating the same comprising a revoluble arbor, an armature loose thereon, and means for transmitting the oscillations of the armature to said arbor and revolving the same in one direction only, electromagnets for said armature, and a suitable electric circuit; of a circuitcloser, consisting of a lever provided with a contactpin, and a segmental contact-plate, means for holding said lever with its pin normally out of contact with said plate, means controlled by the let-off cam for releasing said lever, means for moving the latter with its pin into contact with the contact-plate when released, the amplitude of the motion of the lever, hence the time during which the circuit is closed, being controlled by the aforesaid snail, a circuit-breaker operated to interrupt and again open the electric circuit at each oscillation of the armature, and means operated by the armature-arbor for returning the circuit-closing lever into its normal position, for the purpose set forth.

13. The combination with the main arbor, 64, the minute and hour hand sleeves thereon, the let-off cam and snail revolving with said minute and hour hand sleeves respectively, the arbor 5, the pinion 48 on said arbor, the appliances for revolving said arbor 5, and the segmental contact 54: provided with the pinbearing 57; of the lever it) carrying contactpin 55 and having weighted arm 41, the arbor 47 on which said lever is mounted, the retracting-spring thereon and the lever 43 cssaeo actuated by the let-off cam and acting on lever 40 to move the same and its arbor against the stress of its spring, for the purpose set forth.

l-L. The combination with the main arbor (34, the minute and hour hand sleeves thereon, the let-off cam and snail revolving with said minute and hour hand sleeves respectively,

the arbor 5 carrying the hammer-actuating disk 50, the pinion 48, and the armature 2 loose thereon, means for transmitting the oscillations of said armature to its arbor to revolve the same in one direction only, electromagnets for said armature included in a suitable electric circuit, the arbor 7i carrying the hammer-supporting sleeve 53 and a sleeve both loose on said arbor, said sleeve 7O provided with an arm '72 adapted to be moved into the path of the pins on the hami'ner-lifting disk 50, and said sleeve 53 carrying an arm 51 extending across said arm 72, the endwise-movable arbor 44, its arm L9 engaging sleeve 70 and the contact 54 included in the aforesaid electric circuit and having insulated bearing-sleeve 57; of the circuitclosing lever 40 having toothed segment 40, a Weighted arm 41 adapted to contact with the aforesaid snail, the retractable arbor 4.7 of said lever, and a contact-pin 5e normally seated in the sleeve 57, and the lever 43 operated by let-off cam to disengage the pin 54.- from its sleeve and allow the lever 40 to swing over toward the snail, substantially as and for the purpose set forth.

15. The combination with the striking mech anism of a clock, electrically-operated appliances for actuating said mechanism, a suit able electric circuit including said appliances, a circuit-closer controlled by the let-off cam of the time mechanism, a circuit-breaker, and means for alternately operating said circuitcloser and circuit-breaker; of means for m aintainin g the electric circuit closed through the circuit breaker when the circuit closer is about to interrupt said circuit and before the circuit-breaker is operated, for the purpose set forth.

16. The combination with the striking in echanism of a clock, electrically-operated appliances for actuating said mechanism, a suitable electric circuit including said appliances, a circuit-closer controlled by the let-off cam 0f the time mechanism, acircuit-breaker, and means for alternately operating said circuitcloser and circuit-breaker; of ashunt-circuit and means for closing said shunt-circuit into the main circuit through the circuit-breaker as the circuit-closer interrupts said main circuit and before the circuit-breaker is moved to interrupt the same, for the purpose set forth.

17. The combination with the striki ng mechanism of a clock, electrically-operated appliances for actuating said mechanism, a suitable electric circuit-including said appliances, a circuit-closer controlled by the let-off cam of the time mechanism, a circuit-breaker, and

means for alternately operating said circuitcloser and circuit-breaker; of a sh nut-circuit and electrically-operatcd means for closing said shunt circuit into the main circuit through the circuiii-breaker as the circuitcloserinterrupts said main circuit and before the circuit-breaker is moved to interrupt the same, for the purpose set forth.

18. The combination with the let-off cam 42, snail 39, lever 4:3, arbor 5 carrying pinion as and hainmer-actnating disk 50, the hammerlifting pin 70 normally out of the path of the pins on said disk 50 and electrically-operated mechanism for revolving arbor o; of the circuit-closing lever 40 having toothed sector 40 and contact-pin 55, the insulated contact pin 5dhaving an insulated bearingforsaid pin 55, the arbor 7 to which said lever 40 is secured and which arbor is engaged by the lever 4:53, the retracting-spring for said arbor, the arbor 44: carrying the shifting lever 4:9 in engagement with the sleeve 70 carrying the aforesaid hammer-lifting pin 72, the actuating-spring 44- of said arbor 44, and a suitable electric circuit including the contact-plate 54 and the appliances for revolving arbor 5, the recited parts being arranged and operating substantially as and for the purposes set forth.

19. The combination with the striking mechanism of a clock, appliances for actuating said niechanism by successive electric impulses, a normally-open electric circuit and a primary circuit making and breaking device in a normally-closed relation to said circuit; of a circnit-closer, a let-off cam, means actuated thereby and actuating the circuit-closer to periodically close the circuit, means for determining the length of time said circuit shall remain closed, and means for operating the primary circuit maker and breaker to alternately open and close the circuit during the aforesaid period of closure, for the purpose set forth.

20. The combination with the striking mechanism of a clock, appliances for actuating said mechanism by successive electric impulses, a normally-open electric circuit and a primary circuit making and breaking device in a normally-closed relation to said circuit; of a circuit-closer, a let-off cam, means actuated thereby and actuating the circuit-closer to periodically close the circuit, means for detern'iining the length of time said circuit shall remain closet means for operating the primary circuit maker and breaker to alternately open and close the circuit during the aforesaid period of closure, and means for moving the circuit-closer to again open the circuit at the expiration of said period of closure, for the tnirpose set forth.

21. The combination with the striking in echanism of a clock comprising a sounding device, a hammer, a hammer-actuating pin, a revoluble arbor, an oscillating armature, and a hammer-lifting-piaactuating disk respectively loose and fast on said arbor, an electromagnet for said armature, a normally-open electric circuit, a primary circuit making and breaking device in a normally-closed relation to said circuit, and means for transmittii'ig the oscillatory movements, in one direction, of the armature to its arbor; of a secondarycircuit closer, at let-off cam, means actuated thereby and operating the circuit-closer to periodically close the circuit, means for determining the period during which said circuitshal 1 remain closed, and means controlled by the oscillations of the armature and operating the primary-circuit breaker to alternately open and close the electric circuit d u ring such period of closure, substantially as and for the purpose set forth.

22. The combination with the striking mechanism of a clock, comprising a sounding device, a hammer, a hamtrier-actuating pin, a revoluble arbor, an oscillating armature, a springbarrel and a driving-gear loose thereon and a haminer-lifting-pin-actuating disk fast on said arbor, a motor-spring Wound on the aforesaid barrel and having one end cured thereto and the other to said drivinggear, means for transmitting the oscillations, in one direction, of the armature to its arbor and to the spring-barrel, an electromagnet in a normally-open electric circuit, a circuit making and breaking device in a normallyclosed relation to said circuit; of a circuitcloser, a let-off cam driven from the aforesaid gear on the armature-arbor, means actuated by said cam and operating the circuit-closer to periodically close the electric circuit, means for determining the length of time the circuit shall remain closed, and means controlled by the oscillations of the armature and operating the aforementioned circuit making and breaking device to alternately open and close the circuit during said period of closure, for the purpose set forth.

23. The combination with the striking mechanism of a clock, comprisinga sounding device, a hammer, a hammer-actuating pin, a revoluble arbor, an oscillating armature, a sprii'ig-barrel and a driving-gear loose thereon and a hammer-lifting-pin-acutuating disk fast on said arbor, a motor-spring Wound on the aforesaid barrel and having one end secured thereto and the other to said drivinggear, means for transmitting the oscillations, in one direction, of the armature to its arbor and to the spring-barrel, an electromagnetin normally-open electric circuit, circuit mak ing and breaking device in a normally-closed relation to said circuit; of a circuit-closer, a let-off cam driven from the aforesaid gear on the armature-arbor, means actuated from said cam and operating the circuit-closer to periodically close the electric circuit, means for determining the length of time the circuit shall remain closed, means controlled by the oscillations of the armature and operating the aforementioned circuit making and breaking device to alternately open and close the circuit during said period of closure and means for moving the circuit-closer to again open the circuit at the expiratioli of said period of closure, for the purpose set forth.

2- l-.'.lhe combination with the striking mechanism of a clock, comprising a sounding device, a hammer, a hammer-actuating pin, a revoluble arbor, an oscillating arn'1ature,a

, spring-barrel and a driving-gear loose thereon, and a hammer-iifting-pin-actuating disk fast on said arbor, a motor-spring wound on the aforesaid barrel and having one end sooured thereto and the other to said drivinggear, means for transmitting the oscillations, in one direction, of the armature to its arbor and to the spring-barrel, an electromagnet in anormally-open electric circuit, a circuit making and breaking device in a normally-closed relation to said circuit; of a circuit-closer, a letoff cam driven from the aforesaid gear on the armature-arbor, means actuated by said cam and operating the circuit-closer to pcriodically close the electric circuit, means for determining the length of time the circuit shall remain closed, means controlled by the oscillations of the armature and operating the aforementioned circuit making and breaking device to alternately open and close the circuit during said period of closure, and means controlled by the revolutio s of the armature-arbor for moving the circuit-closer to again open the circuitafter the expiration of said period of closure, for the purpose set forth.

25. The combination With the striking mechanism of a clock comprising a sounding device, a hammer, a hammer-actuating pin, a IGXOlllblQ arbor, an oscillatory armature, a spring-barrel and a main driving gear-Wheel loose on said arbor, and a hammerlifting-pinactuating disk fast thereon, a mainspring Wound on said barrel and having one end secured thereto and the other to said gearwheel, means for transmitting the oscillations, in one direction, of the armature to its arbor and to the spring-barrel, an electromagnet in a normally-open main circuit, a

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circuit making and breaking device in a normally-closed relation to said main circuit, and a circuit-closerin said main circuit; of a branch circuit, a circuit-closer therein, the time mechanism of the clock driven from the aforesaid mainspring, a letoff cam, and means actuated thereby and operating the circuit-closer to periodically close the branch circuit through said main circuit, means for determining the length of time said branch circuit shall remain closed, means controlled by the oscillations of the armature and operating the aforesaid circuit making and breakink device to alternately open and close the main circuit and therethrough said branch circuit, means controlled by the armaturearm for moving the circuit-closer to again interru pt the branch circuitat the expiration of the period of closure thereof, and a circuit-closer in the main circuit controlled by the clock-escapement to close said main circuit at every revolution of the escapementwheel, substantially as and for the purpose set forth.

26. The combination with the striking mechanism of a clock comprising a sounding device, a hammer, a hammer-actuating pin, a revoluble arbor, an oscillatory armature, a spring-barrel and a main driving gear-Wheel loose on said arbor, and a hammer-lifting-pinactuating disk fast thereon, a mainspring Wound on said barrel and having one end secured thereto and the other to said gear- Wheel, means for transmitting the oscillations, in one direction, of the armature to its arbor and to the spring-barrel, means for permitting said arbor under certain conditions to revolve independently of said barrel, an electromagnet in a normally-open main circuit, a circuit making and breaking device in a normally-closed relation to said main circuit, and a circuit-closer in said main circuit; of a branch circuit, a circuit closer therein, the time mechanism of the clock driven from the aforesaid main spring, a letoff cam, and means actuated thereby and operating the circuit-closer to periodically close the branch circuit through said main circuit, means for determining the length of time said branch circuit shall remain closed, means controlled by the oscillations of the armature and operating the aforesaid circuit making and breaking devices to alternately open and close the main circuit and therethrough said branch circuit, means controlled by the armature-arm for moving the circuit-closer to again interrupt the branch circuit at the expiration of the period of closure thereof, and a circuit-closer in the main circuit controlled by the clock-escapement to close said main circuit at every revolution of the escapementwheel, substantially as and for the purpose set forth.

In testimony that I claim the foregoing as my invention 1 have signed my name in presence of two subscribing witnesses.

llJALMAR EMANUEL ANDERSSON.

Witnesses:

TH. WAWnINsKY, M. GENBERG.

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