US1483814A - Electric clock - Google Patents

Description

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ATTORNEY Patented Feb. l2, l924.

Hmm F. JUBUICX, F ALLENTOWN, PENNVBYLVIANIA.

ELECTRIC CLOCK.

Application lied April 18, 1922. Serial No. 554,429.

To all whaha it may concern:

Be it known thatl I, MAXIMILIAN F. J UnUIcK, a citizen of the United States, residing at Allentown, in the county of Lehigh and State of Penns lvania, have invented new and useful mpro'vements in Electric Clocks, of which the following is a specification.

This invention relates to improvements in electrically operated clocks.

An object of the present invention is the provision of means for preventing a sudden movement of the clock pendulum, such as usually occurs when a magnet is intermittently energized to impart movement to the pendulum and to accomplish this, an armature which is movable within the magnetic field, is sopconnected to the pendulum as tov compensate for any suddenness of movement due to its attraction by the magnet. Y

Another object of the invention is the provision of novel means for transferring movement from the pendulum to the clock mechanism, the said means also acting to kprevent sudden or jerky power impulses of the clock mechanism. A

W'ith the above and other objects in view, the invention further includes the following novel features and details of construction, to be hereinafter more fully described, illustrated in the accompanyin drawings and pointed out in the appende claim.

In the drawings Figure 1 is a rear elevation of the invention with the clock casing removed.

Figure 2 is a side view of the same.

Figure 3 isl a fragmentary perspective view showing the upper end of the pendulum and the yieldingly mounted armature and dog.

Referring in, detail to the drawings, wherein like characters of reference denote corresponding parts, the reference characters 10 and 11 indicate respectively front and rear plates of the frame which is -connected by bars or studs 12 and which is deslgned to support the clock mechanism. This mechanism includes a drive *shaft 13 which extends through the front plate 10 and throu h the clock face 13 and may have mounted t ereon a second hand 15.

The drive shaft 13 has secured thereonA a pinion 16 which o rates a. gear 17 fast t e said arbor 18 being mounted in suitable bearings provided in the frame. Also fast upon the arbor 18 is a pinion 20, which drives a gear 21, fast u n a shaft 22 mounted in bearings in t e frame. The shaft .22 has secured thereon a pinion 23 which drives a gear 24, the last mentioned gear being fast to a sleeve 25 surrounding the minute arbor 18. The sleeve 25 provides an arbor for the' hour hand 26. The ratio of the gears just described is such as to impart proper relative movement to the hands 15, 19 and 26.

Pivotally sup orted in the frame just described is a pendulum 27, which is provided at its upper end with oppositely extending knife trunnions 28, the latter enterin openings 29 provided 1n the frame, so t at the pendulum will be capable of free swinging movement. Extending upward from the up per end of the pendulum 27 is a resilient arm 30, which carries at its u per end an arcuateshaped armature 31. This armature is located Within the magnetic field of a magnet 32 which is supported by the frame. Also mounted upon the resilient arm 30 is a dog 33, which is adapted to engage the teeth of a ratchet 34, the iatter being fast upon the drive shaft 13. Thus, when motion is -imparted' to the pendulum 27, the dog 33 will engage the teeth of the ratchet wheel 34 so as to rotate the shaft 13 and operate the handsl of the clock. By mounting the dog 33 upon the resilient arm 30, the said arm will give sufficiently at the initial engagement of the dog 33and the ratchet wheel 34 and prevent sudden or jerky movement of the clock mechanism. Further, by mounting the amature 31 upon this resilient arm 30, sudden or jerky movement of the pendulum is prevented.- This is due to an independent movement of the armature 31 when the magnet 32 is first energized,

continued movement of the armature imparting movement to the pendulum 27 in a smooth and easy manner, movement from the arm 30 being gradually transferred to the endulum.

with a suitable source of current, such as a battery B, by means of a conductor 35l and the said magnet is grounded on the frame as shown at 36. The battery B is also connected by means of a conductor37 with a contact 38, carried by and insulated from the frame and this contact engages the periphery of a wheel 39 which is fast upon T e magnet 32 is connected in circuit gages the Contact 38, the magnet 32 will be energized to attract the armature 31 and impart an impulse to the pendulum 27. The

interval between `these impulses may be re vlated by the number of teeth in the rate et Twheel 34. For example, should the ratchet Wheel 34 be provided with sixty teeth, it will be moved the distance of one tooth upon each complete stroke of the ndulum, so that the pendulum will make sixty complete strokes (that is a stroke back and forth) to ever impulse.

l' hen the rib 40 eng Ges the arm 38, current will ilow 'from the attery through the conductor 35, the magnet 32, the ground 36 through the frame and the ratchet Wheel 34, the rib 40, the contact 38 und the conductor 37 to the battery.

The invention is susceptible of various changes in its form, yproportions and minor details of construction and the right is hemin reserved to make such. changes afs properlv fall within the scope of the appended claim. Y

Having described the invention what is claimed isz- In an electrically operated clock, e drive shaft, means operated y the drive shaft for operating the hands of the clock, a pendulum, a ratchet mechanism connecting the pendulum and drive shaft, an upwardly extending resilient arm carried by the pendulum,.an arcuate'shaped armature carried et the 'upper end of the arm, u magnet included yin circnuit with a source of current, mea-ns controlled by the operation of the drive shaft for intermittently closing the circuit to energize the magnet and attract the arml- Ature and a dog also carried by the resilient arm and engaging the ratchet mechanism, whereby wer will be intermittently appliedto t e drive shaft.

In testimony whereof I ax my signature.

MAXIMILIAN F. JRUICK.

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