(No Model.) 3 Sheets-Sheet 1.

J. H. DYSON.

ELECTRIC AGTUATING DEVICE FOR PBNDULUM GLOGKS.

Patented Nov. 4, 1890.

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Wi'messes J 97% Inventor AHLorney/J h W (No Model.) 3 SheetsSheet 2.

J. H. DYSON.

ELECTRIC AOTUATING DEVICE FOR PBNDULUM CLOCKS.

No. 439,838. Patented Nov. 4, 1890.

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(No Model.) 3 SheetsSheet 3. J. H. DYSON.

ELECTRIC AOTUATING DEVICE FOR PBNDULUM CLOCKS.

No. 439,838. v Patented Nov. 4, 1890.

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Qwmeoow Smwmboz UNITED STATES PATENT OFFICE.

JOHN H. DYSON, OF MAZOMANIE, WISCONSIN, ASSIGNOR OF ONE-HALF TO HERMAN O. WETHERELL, OF SAME PLACE.

ELECTRlC ACTUATING DEVICE FOR PENDULUM CLOCKS.

SPECIFICATION forming part of Letters Patent No. 439,838, dated November 41, 1890.

Application filed June 2, 1890- Serial No. 353,988.

To all whom, it may concern:

Be it known that 1, JOHN H. DYSON, acitizen of the United States, residing at Mazomanie,in the county of Dane and State of Wisconsin, have invented a new and useful Electric Clock-Motor, of which the following is a specification.

My invention relates to improvements in electric clock-motors; and the objects of my improvements are to produce an electric motor for the time-registering machinery of clocks in which the pendulum receives all the impulse directly and continuously, imparting none, and its Vibration by spring suspension is avoided, in which a non-adhering current-switch or cut-off spring acting by reversed deflection and other advantages hereinafter appearing are provided. I attain these objects by the mechanism illustrated in the accompanying drawings, in which Figure l is a front elevation of the whole device except the lower part of the pendulum and case; Fig. 2,a left-hand side elevation of the same; Fig. 3, a top view of the same; Fig. 4c, a side view of the stud-pin supporting the pendulum cross-plate; Fig. 5, a front view of the stud-bolt; Fig. 6, aloft-hand side View of the same; Fig. 7, a top view of the same; Fig. 8, a vertical section of the same and of the stud-pin on the line '1 T, Fig. 7; Fig. 9, a front view of the armatures and frames; Fig. 10, a top view of the same; Fig'. 11, a top and front View of the pendulum in section, and Fig. 12 a side and end viewof its cross-plate.

Similar letters refer to similar parts throughout the several views.

A is a non-conducting rubber bracket-plate fastened upon the upper part of the inner face of the back 0 of the case, insulating the case from the current.

13 is a stud-bolt,fiattened for a little width on top, inserted in the case just below the plate A, projecting horizontally forward far enough to underlie and support the armature-frames at their front ends. The pendulum D projects upward a short distance through and oscillates laterally in a vertical slot P in the bolt B, and such projecting part of the pendulum has a slot 0 from front to back, receiving the steel cross-plate E, which is loosely (No model.)

pinned in the pendulum and extends to and over and has its lower edge, vnich is sharpened, resting in the grooved heads of the two stud-pins a a,inserted loose in the upper face of the bolt B, on which th y rest on concave shoulders, which allow them to adjust themselves to the cross-plate, ;-ne pin being on each side of and near to the pendulum.

Mytwo armatures and frames are similarly constructed. The frames have the horizontal semicircularbrass plates Z) b,bowed, respectively, outward and to the right and left above the middle line of the upper surface of the bolt 13, the ends of each plate alternating with and crossing alittle distance by those of its fellow, and all such ends having downward side lips, steel-hushed, through which at the front the ends of both plates are journaled upon one hard-steel pin 0, inserted in the inward face of an upward lug upon the front end S of the bolt 13. At the rear the ends of both plates are j ournaled on the hardsteel pin c,'inserted in the case. Such two bearings of the armature-frames are in line with those of the pendulum with which through part of its course the frames swing. From the central parts of the semicircular plates Z) Z) outwardly project brass arms 01 cl, carrying near their inner ends the downwardly projecting fingers g g, inwardly curved, and said arms carrying at their outward ends the horizontal iron armatures c 6, extending, respectively,from one terminal to the other beneath the electro-magnet F F and the clectro-magnet F F, each of which magnets is in the form of vertical twin-cylinder coils, connected by wires N N, and the two electro-magnets are placed, respectively, on the extreme right and left of and their rear coils in front of the plate A. For contact with the terminals of the magnet the armatures have upwardly-projecting brass pins f f f f to avoid an excessive current to the armatures and their adhesion to the magnets when the current is cut off.

Near the rear ends of the semicircular plates 1) b of the arm ature-fra1nes are inserted the upwardly and laterally projecting brass wires h h, crossing each others course to the right and left and their free ends terminating in backward cam-arms, which are near to and when the frames are depressed, press against that side of the switch or cut-off spring 2' which is opposite such frame and armature and reverse the deflection of such spring. At such points of contact the camarms are provided with non-conducting heads 00 a:

The cut-off spring 1', which is both a constant conductor and switch, is a fiat, delicate vertical platinum-faced brass spring, with its rear edge just in front of the central line of the plate A, and is compressed between its end supports, so that it is deflected centrally to the right or left and must rest in one of such positions. To provide for its increased longitudinal reach when its deflection is being changed, its lower end, which is steeledged, rests in a groove in the upper face of the horizontal steel spring j, near its free end. The other end of such last spring is attached edgewise to a small bracket ton the plate A.

The upper end of the spring 11 is inserted in the lower face of the binding-post 70, which at its rear end is supported in the plate A near its upper edge, and is connected by the Wire Z to the positive pole of the battery. A little below the upper end of the springz' are the inner or free ends of the laterally-extending connecting-wires 0 0', platinum-covered at contacting points, close enough, respectively, to its sides to be in contact alternately when such spring is deflected toward them by the cam-wires h h. The other ends of such conducting-Wires are inserted in small conducting-brackets n 02 upon the plate A, in which brackets are also inserted the Wires m m ,connecting to the rear terminals of themagnets F F F F. The other terminals of such magnets are connected by the wires 12 'u to the binding-post g and thence by the Wire 10 to one terminal of an electro-magnet, from the other terminal of which the current is conducted by a wire to the negative pole of the battery. Such last magnet is provided with an armature suspended upon a hinged frame, having a lever and pawl acting upon a ratchet-wheel of the time registering and indicating works of a clock, all constructed in any usual and suitable manner for the purpose. If more than one clock is to be actuated by my motor, the electro-magnets for all, provided as above stated, will be successively connected by wires, and the last electro-magnet Will be connected to the negative pole of the battery. A regular and uniform motion will be given to the last armature by the alternate attraction of the armature to the magnet when it is excited and the descent of the armature when the current is out OK. The primal magnets F F F F are charged alternately and with perfect regularity, but a moment of time intervenes between such charges-to wit, while the spring 1' is passing by reversed deflection from one of the connecting-Wires 0 0' to the other-so that the current will traversethe wire w at intervals,

thereby providing for the alternate attraction and release of the armature of the secondary electro-magnet. Suppose the motor in operation and one magnet F to have its connecting-wire 0 against the cut-01f spring 1. Such magnet Will be excited and its armature elevated and adhering. The other magnet F, as presently explained, at the same time that thefirst armature is elevated will be cut ofi from the current and its armature released. Such released armature, by its weight, Wlll descend and the camwire it of its frame will press against the cut-off spring on the side opposite such descending armature, and it will deflect such spring toward such armature and against the connecting-Wire 0 of its magnet F, which will then become excited and attract upward to itself its so-depressed armature, While the other magnet F Will be disconnected from the current by the same deflection of the spring 2', and its adhering armature will be released and will descend and reverse the deflection of the spring '5 and the current and will be attracted to its first-described position, and so on alternately. At the time of each such change of current the pendulum will be at its extreme swing on the side of and beneath the elevated and adhering armature of the excited magnet, and will when such armature descends be 1mpelled by the finger g of its frame during its return course. The other armature Wlll be at its extreme depression and will be attracted and elevated to its magnet, and the finger of its frame will be removed from before the pendulum, and it will adhere to ts magnet until the pendulum is at its extreme swing and the first armature descends and reverses the current, when the second armature will descend and the finger of its frame will impel the pendulum, and so on alternately. In Fig. l the left armature is elevated and the right is descending. Such impulse will be suificient to keep the pendulum in motion as long as the current is supplied by the battery to the primal magnets, and conveyance will be made of an intermittent current through the wire wto and through a sec ondary magnet or magnets, each operating an armature, frame, lever, pawls, and the train of wheel-Works of the time register and indicator of a clock.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. In combination, the pendulum, the magnets, the armatures operating on each side of the pendulum, a switch-spring i, electrically connected with the battery, a contact on each side of the switch-spring, electrically connected to the magnets, respectively, connections from the magnets to the battery, and the cam projections carried by the armatures for operating the switch-spring, substantially as described. I

2. In the described mechanism, the pendus lum, the magnets, the armatures, the spring 2', the cam projections h h, and the spring j, for pressing upon the switch-spring, substantially as described.

3. In combination, the pendulum, a stationary magnet, a movable armature on each side of the pendulum, each of said armatures having a depending arm 9 for engaging the pendulum, and suitable switch mechanism operated from the armatures, substantially as described.

4. In combination, the pendulum, the magnets, the armature-frames pivoted at a central point, having the cam-arms h h at their inner end, the switch-spring i, and the electrical connections, substantially as described.

5. In combination, the pendulum, the bolt B, having an opening to receive the pendulum, the cross-piece E, the bearing-studs a on the bolt, the magnets, the armatures, and the switch mechanism, substantially as de- 20 scribed.

JOHN H. DYSON.

Witnesses:

FRED WV. J OHNS, HENRY SOHILDT.