US1771383A - Pendulum - Google Patents

Description

W. C. ROE

Jul 22, 1930.

PBNDULUI Filed May 18. 1929 mmmm Patented July 22, 1930 UNITED STATES PATENT OFFICE 1 WILLIAM 0. Ron, or ELYRIA, onro, ASSIGNOB T TELKOR, me, or ELYRIA, OHIO, A

- coaronacrron or OHIO PENDULUM Application filed Kay 18,

My invention relates to pendulums and relates more particularly to pendulums adapted to control the escapement of a clock mechanism. Although it is well known that clock mechanisms employing pendulums to regulate the rate of escapement of the chronolong periodicity for its overall length.

The drawings illustrate an embodiment of my invention wherein:

Fig. 1 is a front elevational view of a pendulum mechanism embodying the principles of my invention, an alternate position of the parts being indicated by dotted lines.

Fig. 2 is a side elevational View thereof.

Referring to the drawings, at 1 I show a support for a pendulum which comprises a pendant resilient reed 2 supporting at its lower end a connector 3 aflixed thereto, and an upstanding reed 4 rigidly secured at one end to the c0nnector3 and at its other upper end supporting a weight 5.

The su port 1 may take various forms, but I prefera loly clamp the reed 2 between parallel wings 7 and 8 of a sheet metal stamping, having terminal flanges 9 by which the pendulum support may be rigid y affixed to the form 10 of a clock mechanism.

In the embodiment illustrated, the pendant reed 2 comprises a pair of fiat steel springs disposed in relatively edgewise parallel relation throughout their lengths. The reed 4,

r however, in the embodiment illustrated, comprises a single fiat steel spring carrying at its upper end the weight 5 which is afiixed to the spring 4 in any suitable way, and preferably comprises a connecting tongue 11 slotted to receive the end of the spring 12 between the 1929. Serial No. 364,219.

bifurcated portions of the tongue. This construction insures that the effect of the weight will not create a localized bending stress on the end of the spring 4 to either break it or cause segmental vibration of the reed 4.

As illustrated, theupstanding spring 4 is disposed edgewise between and in parallel relation with the twin springs comprising the reed 2 and the effect of this arrangement is to permit oscillation of the weight 5 between the adjacent edges of the twin springs 2 as indicated by the solid line and dotted line illustrations of alternating positions of the weight illustrated in Fig. 1.

At 13 a pair of forks or an escapement controlling lever 14 are shown, the said forks being disposed on opposite sides of at least one of the springs 2 at an intermediate portion of its length.

In operation the weight 5 oscillates to the alternating extreme positions indicated in Fig. 1 and during such oscillation the lower ends of the reeds carrying the connector 3, take alternate positions as indicated by dotted and solid lines in Fig. 1.

Such a pendulum will oscillate at a very low periodicity, this being particularly true when the reed springs 2 and 4 are each made very thin; and, when, as preferred, the cross sectional area of the spring 4 throughout substantially its entire length, is equal to the cross sectional areas of the springs making up the reed 2.

Having thus described my invention I am aware that numerous and extensive departc ures may be made from the embodiment herein illustrated and described but without departing from the spirit of my invention.

I claim:

1. A pendulum comprising in combination with a fixed support, a reed pendant by an end therefrom, a second reed secured at a freely oscillatable portion of the first reed, extending upstandingly therefrom and a weight carried by the second reed remotely of its supported end.

2. A pendulum con'iprising, in combination with a fixed support, a reed pendant by an end therefrom, a second reed secured at a freely oscillatable portion of the first reed, 1:30

extending upstandingly therefrom and a- Weight carried by the second reed remotely of its supported end, one of said reeds comprising a pair of parallel springs, the other of said reeds extending in parallel relation between said springs.

3. A pendulum comprising, in combination with a fixed support, a reed pendant by an end therefrom, a second reed secured at a freely oscillatable portion of the first reed, ext-ending upstandingly therefrom and a Weight carried by the second reed remotely of its supported end, one of said reeds comprising a pair of parallel springs, the other of said reeds extending in parallel relation between said springs, all of said reeds comprising strips of flat spring material normally disposed in parallel edgewise relation.

In testimony whereof I hereunto afiix my signature this 10th day of May, 1929.

WILLIAM C. ROE.

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