US1335147A

US1335147A - Electric clock

Info

Publication number: US1335147A
Application number: US213339A
Authority: US
Inventors: Andersen Poul Peter
Original assignee: Individual
Current assignee: Individual
Priority date: 1918-01-23
Filing date: 1918-01-23
Publication date: 1920-03-30
Anticipated expiration: 1937-03-30

Description

P. P. ANDERSEN.

ELECTRIC CLOCK. APPLICATION FILED JAN.23, 1918.

Patented Mar. 30, 1920, figj 2 SHEETS-SHEET 4 7 23 9 E. 1 2b '16. if Q z O (a 1 3 Ji l, VZI tZOI' P. .P. ANDERSEN.

ELECTRIC CLOCK.

APPLICATION FILED JAN.23, 1918.

1,335,147. Y Patented Mar/30, 1920'.

2 SHEETS-SHEET 2.

2\ I firm 671 507" POUL PETER ANDERSEN, OF TAASTRUP, DENMARK.

ELECTRIC cLooK.

Application filedianuary 23, 1918.

To all whom it may concern Be it known that I, POUL PETER ANDER- SEN, subject of the King of Denmark, and residing at Taastrup, Denmark, have invented certain new and useful Improvements in Electric Clocks, of which the following is a specification.

T he present invention relates to improve ments in electrical master clocks of the type in. which the pendulum, during its oscillation, rotates a toothed wheel and thereby causes a periodical circuit-closing by way of an electro-magnet which attracts its armature. This movement of the armature serves to lift a lever which, during its subsequent fall, imparts an impulse to the pendulum. The distinguishing feature of the invention is that the lever is maintained in its raised position until it is released by the pendulum itself.

In the accompanying drawing,

Figure 1 is a view in front elevation showing one form which the improved master clock may take in practice;

Fig. 2 is a view in front elevation of the lower end of the clock and the lower portion of the impulse mechanism;

Fig. 3 is a side elevation of the pendulum; and

Figs. a and are details of the impulse mechanism of the pendulum.

1 is a pendulum. rod (Fig. 1) adapted, in known manner, to swing about a fixed horizcntal shaft 2. 3 is a rocking plate pivoted on shaft 2 and carrying a lever 4 whose free end is fitted with a fork 5 which engages the pendulum rod 1, sothatthe lever 4: is forced to follow the swinging motions of the pendulum. The lever 41 carries a laterally-extending arm 6, whereon there is pivoted a pawl 7, engaging a ratchet wheel 8.

On the ratchet wheel 8 or on its shaft, there is lined a radial arm provided with a pin 11. is a check-pawl preventing the whee 6 from being turned to the left (111 Fi l hen the pendulum s' ings to the 1 l from the position shown in Fig. 1, then the lever at, the arm 6 and the pawl 7 will also swing to the left, the pawl sliding on top of a fixed guiding arm 9 as long as this motion lasts. When the pendulum thereafter swings back, that is to the right, the pawl 7 forces the wheel 8 to rotate one or more tooth spaces in a clockwise direction.

Specification of Letters Patent. Patented hltl. 30, 1928- Serial No. 213,339.

W hen the pendulum has performed a suitable number of oscillations, the wheel 8 will have beenturned so far that the pin 11 will be caused to strike a tappet 12 on a double-armed lever 13-64:, one arm 13 of which carries a contact terminal 15 insulated from said arm, while the other arm carries a counter-weight 22 of suitable'size.

When the pin 11 strikes against the tappet 12, then the two-armed lever 13-44- is rocked counter-clockwise, and its arm 13 is forced downward, the terminal 15 being brought into engagement with a mercury contact 1819 or the like. This engagement of the two contacts closes an electric circuit which includes an electro-magnet 23 and a battery or other source of current A, the magnet remaining energized as long as the said circuit is maintained closed. The circuit is broken, however, immediately after having been closed, by the pin 11 being moved away from the tappet 12 during the continued motion of the pendulum. Thereupon the electro-magnet becomes deenergized and releases its armature B.

By means of a draw-bar 24, whose length is adjustable, the armature B is connected to a lug or eye 25 ona lever arm 26. The latter is pivoted on a fixed pin 28 and carries a weight C which tends to swing the lever downward into the vertical position indicated in dot and dash lines (Fig. 2).

The free lower end of the lever 26 forms a fork 27, wherein there is fastened a pin D serving as a fulcrum for a three-armed lever 29-3031. The arm 29 of this lever ends in a head 32 (Fig. 1) cooperating, in the manner subsequently explained, with a trip lever 33 pivoted about a fixed pin 37. When the lever 26 occupies the position shown in full lines in Fig. 2, the free end of the arm will rest against a fixed stop 34, thus preventing the weight C from forcing the lever 26 to rock. The third arm 3.1 of the three-armed lever is resilient and, by meeting a fixed stop 35 located for instance on the wall of the clock-case (not shown). insures the engagement of the arm 30 with the fixed stop 34, when the lever 26 has been raised.

The trip lever 33 has a projecting nose 36 (Figs. 2 and 5) to engage the head 32 on the lever arm 29, when the swinging lever 26 occupies the position shown in full lines.

The trip lever is also formed with an upwardly directed edge 38 adapted to be caught by teeth 39 on an arm 40 fastened to the pendulum, when the latter swings to the right. On the lever 33 is furthermore fastened a pin 41 (Fig. 5) parallel to the axis of oscillation of the lever, which may be caused to cooperate, in the manner explained below, with an upwardly-curved guide arm 42 on the striking arm 43 of the pendulum. The trip lever is finally provided with a lateral arm 49 which is caught, when the swinging lever is raised, by a hook '44, pivoted on a pin 45 fastened in a clip 46 on the lever 26.

The arms 40 and 43 are hinged to the pendulum, although their freedom to rock or oscillate relatively to the latter is limited in some suitable way. The movement of the arm 40 may be limited, for instance, by a strap 50 which embraces the arm and is fastened to the Wall of the clock-case, while the movement of the arm 43 may be limited by two pins 51 on the pendulum, all as represented in Fig. 2.

Assuming that the lever 26 with the parts fixed thereto occupies the position shown in dotted lines in Fig. 2 while the trip lever 33 occupies its extreme leftward position, also indicated in dotted lines and limited by a fixed stop 47, then, during the rightward oscillation of the pendulum, the teeth 39 on the arm 40 swinging with the pendulum will pass free of the edge 38 of the trip lever 33, and the head 32 on the arm 29 (Figs. 2 and 5) will be located so low that the arm 43, which also oscillates with the pendulum, cannot engage the said head.

If, now, the circuit is closed, in the above described manner, by way of the electromagnet 23, the latter attracts its armature, whereby the rod 24 is lifted and swings the lever 26 in the direction away fr 111 the pendulum and into .the position shown by full lines in Fig. 2. The end of the arm 30 is thereby caused to slide down behind and into engagement with the fixed stop 34 and in this way holds the lever 26 in the position shown after the electro-magnet has again become deenergized and has released its ar mature. The resillent arm 31, by striking the fixed stop 35, insures that the arm 36 will actually slide down behind the stop 34-. During this rightward movement of the la ver 26, the hook 44 will carry the arm 49 along with it and move the trip lever 33 into the position shown by full lines.

When the pendulum, during its subsequent oscillation, swings to the right (in Fig. 2), the toothed arm 40 will be moved above the edge 38, while at the same time the curved arm 42 will strike against and be cammed upward by the pin 41, thereby lifting the arm 43 clear of the head 32 on the lever arm 29.

W hen the pendulum thereafter swings to the left, theteeth 39 on arm 40 will catch the edge 38 on the trip lever 33 and force the latter to rotate in a leftward direction toward the pendulum. The nose 36 on the trip lever 33 is also turned thereby, so that it lifts the arm 29 and, consequently, the arm 30. The latter is thereby released from the fixed stop 34. On account of its weight C, the lever 26 will now swing back toward the pendulum at a speed exceeding that of the pendulum, if the said weight is properly adjusted, and for that reason the head. 32 of the arm 29 will hit the striking arm 43 and give it an impact of an intensity adjusted in such a manner that the pendulum receives the impulse necessary for maintaining its amplitude of oscillation.

After having given this impulse, the arm will again occupy the dotted line position, until the next circuit-closing action occurs, etc.

In case the amplitude of oscillation of the pendulum has not decreased appreciably when the circuit is closed, for instance when the pendulum has previously received a series of successive impulses, it is possible to prevent the pendulum from receiving an impulse from the lever 26 during or immediately after the closing of the circuit by nitably adjusting the weight C. In fact, if the amplitude of oscillation of the pendulum is sufficiently great, the arm 42 will move so far beyond the head 32 of arm 29 that the arm 43 will be raised to such an extent that the head 32 will pass down below the striking arm 43 instead of hitting the same during the return-motion of the lever 26, provided that the speed of fall of the latter,

or rather its speed of return motion, is suitably adjusted by variation of the weight C.

The construction shown on the drawing is only one manner of constructing the invention, which may be modified in many manners, without departure beyond its scope. For instance the

contacts

18 and 19 need not necessarily have the shape shown on the drawing, and the shape of the lever 1314 and the pawl arrangement 6, 7 8, 9, 10 may also be modified according to requirements.

To the master clock there may of course be connected one or more secondary clocks showing the time. These secondary clocks,

the duration of the circuit-closing interval required for keeping the clock going being only about 0.3 second per minute.

I claim as my invention:

1. A mechanism for periodically imparting impulse movements to the pendulum of an electric master clock, comprising a swinging lever adapted to be periodically raised by the oscillations of the pendulum; a detent pivoted to the free end of the swinging lever; a fixed stop cooperating with the detent to hold the swinging lever in raised position; a lever adapted to be tripped by the pendulum to release the detent from said stop and permit the swinging lever to fall; and a striking arm carried by the pendulum and adapted to be hit by the detent during the fall of the swinging lever.

2. A mechanism for periodically imparting impulse movements to the pendulum of an electric master clock, comprising a vertical rod adapted to be periodically raised by the oscillations of the pendulum; a swing ing lever pivotally mounted at its upper end and having the lower end of said rod connected to its said end at one side of the pivot, so that said swinging lever will be rocked in an upward direction when the vertical rod is raised; a detent pivoted to the free end of the swinging lever; a fixed stop cooperating with the detent to hold the swinging lever in raised position; a lever adapted to be tripped by the pendulum to release the detent from said stop and permit the swinging lever to fall; and a striking arm carried by the pendulum and adapted to be hit by the detent during the fall of the swinging lever.

3. A mechanism for periodically imparting impulse movements to the pendulum of an electric master clock, comprising a swing ing lever adapted to be periodically raised by the oscillations of the pendulum; a twoarmed detent pivoted to the free end of the swinging lever; a fixed stop engageable by one arm of the detent when the swinging lever is raised, to hold said swinging lever in such position; a trip lever cooperative with the other arm of the detent to hold the latter in engagement with the fixed stop and adapted to be tripped by the pendulum so as to disengage the first-named arm and permit the swinging lever to fall; and a striking arm carried by the pendulum and adapted to hit the said other arm of the detent during the fall of the swinging lever.

4. A mechanism for periodically imparting impulse movements to the pendulum of an electric master clock, comprising a swinging lever adapted to be periodically raised by the oscillations of the pendulum, a detent pivoted to the free end of the swinging lever; a fixed stop engageable by the detent when the swinging lever is raised, to hold said swinging lever in such position; a trip lever cooperative with said detent to hold the same in engagement with said stop; a member carried by the swinging lever for moving the trip lever into position for such cooperation; means operated by the pendulum for tripping said trip lever to release the detent and permit the swinging lever to fall; and a striking arm carried by the pendulum and adapted to be hit by the detent during the fall of the swinging lever.

5. A mechanism for periodically imparting impulse movements to the pendulum of an electric master clock comprising a swinging lever adapted to be periodically raised by the oscillations of the pendulum; a detent pivoted to the free end of the swinging lever; a fixed stop engageable by the detent when the swinging lever is raised, to hold said swinging lever in such position; a trip lever cooperative with said detent to hold the same in engagement with said stop; a bar pivoted to the pendulum and engageable with the trip lever to trip the same and release said detent, so as to permit the swinging lever to fall; and a striking arm carried by the pendulum and adapted to be hit by the detent during the fall of the swinging lever.

6. A mechanism for periodically imparting impulse movements to the pendulum of an electric master clock, comprising a swinging lever adapted to be periodically raised by the oscillations of the pendulum; a detent pivoted to the free end of the swinging lever; a fixed stop engageable by the detent when the swinging lever is raised, to hold said swinging lever in such position; a trip lever cooperative with said detent to hold the same in engagement with said stop and having a beveled upper end; a toothed bar carried by the pendulum and adapted to ride over the beveled end of the trip lever during" the movement of the pendulum in one direction and to engage said end and trip said lever when the pendulum swings in the other direction so as to release the detent and permit the swinging lever to fall; and a member on said pendulum adapted to be struck by the detent during the fall of the swinging lever.

7. A mechanism for periodically imparting impulse movements to the pendulum of an electric master clock, comprising a swinging lever adapted to be periodically raised by the oscillations of the pendulum; a detent pivoted to the free end of the swinging lever; a fixed stop engageable by the detent when the swinging lever is raised, to hold said swinging lever in such position; a trip lever cooperative with said detent to hold the same in engagement with said stop and provided with a catch; a member carried by the swinging lever and engageable with said catch during the upward movement of said swinging lever to move the trip lever into position for such cooperation; and means operated by the pendulum "for tripping said trip lever to release the detent and permit the swinging lever to fall.

8. A mechanism for periodically imparting impulse movements to the pendulum or an electric master clock, comprising a swinging lever adapted to be periodically raised by the oscillations of the pendulum; a detent pivoted to the free end of the swinging lever; a fixed stop engageable by the detent when the swinging lever is raised, to hold said swinging lever in such position; a trip lever cooperative with said detent to hold the same in engagement with said stop and provided with a catch; a member carried by the swing ing lever and engageable with said catch during the upward movement of said swinging lever, to move the trip lever into position for such cooperation; means operated by the pendulum for tripping said trip lever to re lea e the detent and permit the swinging lever to tail; and a member on said pendulum adapted to be struck by the detent during the fall of the swinging lever.

9. A mechanism for periodically impar ing impulse movements to the pendulum of an electric master clock, comprising a swinging lever adapted to be periodically raised by V the oscillations of the pendulum; a detent pivoted to the tree end of the swinging lever; a fixed stop ongageable by the detent when the swinging lever is raised, to hold said swinging lever in such position; a trip lever cooperativ with said deten to hold the same in engagement with said step and provided with a catch; a member carried by the swinging lever and engageable with said catch during the upward movement of said swinging lever, to move the trip lever into position for such cooperation; and a bar pivoted to the pendulum and engageable with the trip lGVP/Y trip the same and release said detent, so as to permit the swinging lever to fall.

10. A mechanism for periodically imparting impulse movements to the pendulum of an electric master clock, comprising a swinging lever adapted to be periodically raised by the oscillations of the pendulum, a detent pivoted to the free end of the swinging lever; a fixed stop engageable by the detent when the swinging lever is raised, to hold said swinging lever in such position; a trip lever cooperative with said detent to hold the same in engagement with said stop and provided with a catch; a member carried by the swinging lever and engageable with said catch during the upward movement of said swinging lever, to move the trip lever into position for such cooperation; a bar pivoted to the pendulum andengageable with the trip lever to trip the same and release sald detent, so as to permit the swinging lever to fall; and a striking arm pivoted to said pendulum below said bar and adapted to be hit by said detent during the fall of the swinging lever.

11. A mechanism for periodically imparting impulse movements is the pendulum of an electric clock, comprising a swinging lever adapted to be periodically raised by the oscillations of the pendulum; means for momentarily holding said lever in raised position; means operated by the pendulum for releasing said holding means to permit the swinging lever to fall; and a striking element adapted to receive an impact consequent upon the Ballot the l ver and to transmit such impact directly to the pendulum.

12. A mechanism for periodically imparting impulse movements to thependulum of an electric clock, comprising a swinging lever adapted to be periodicall raised by the oscillations of the pendulum; means for momentarily holding said lever in raised position; means operated by the pendulum for releasing swinging lever to fall; and a striking arm carried by the pendulum and adapted to re ceive an impact consequent upon the tall oi? the lever and to transmit such impact directly to the pendulum.

13. A mechanism for periodically imparting impulse movements to the pendulum 0t an electric cloclncomprising aswinging lever adapted to be periodically raised by the osillations of the pendulum; means for momentarily holding said lever in raised position; means operated by the pendulum for releasing said holding means to permit the swinging lever to fall; and a striking arm carried by the pendulum and adapted to receive an impact from said holding means consequent upon the fall of the lever and to transmit such impact directly to the pendulum.

1 1-. A mechanism for periodically imparting'impulse movements to the pendulum of an electric clock, comprising a swinging lever adapted to be periodically raised by the oscillations of the pendulum; means for momentarily holdingsaid lever in raised position; means operated by the pendulum for releasing said holding means to permit the swinging lever to fall; and a striking arm carried by the pendulum and adapted to receive an impact, from said holdingmeans consequent upon the fall 01? the lever and to transmit such impact directly to the pendulum.

In testimony whereof I afix my signature.

FOUL PETER iiNDER-SEN.

Witnesses I CHARLES HUNTLEY, F. WEILSKOV.

said holding means to permit the