US677004A - Clock striking mechanism. - Google Patents

Description

No. 677,004. C Patented June 25, 19m.

L. L. voLPo.-. CLOCK STBIKING MECHANISM.

(Application flied Nov. 17, 1899.)

(No Model.)

wllintadtl. v I Invento r' 1: ion"! Imus co mowuma. wumnamm a c4 UNITED STATES PATENT OFFI E- LEISER LEVI VOLPO, OF JERUSALEM, PALESTINE, TURKEY IN ASIA.

CLOCK STRIKING MECHANISM.

I $IEGJIEIQATJION forming part of Letters Patent No. 677,004, dated June 25, 1901. Application filed November 17, 1899- Serial No; 737,366. (No model.)

To all whont it may concern:

Be it known that I, LEISER LEVI VoLPo, a British subject, residing at Jerusalem, Palestine, Turkey in Asia,'have invented lmprove ments in Striking Mechanism for Clocks and WVatches, of which the following is a specification.

This invention relates to improvements in the striking mechanism of clocks and watches, having for their objectto simplify the construction and economize power and toregulate the speed of the striking apparatus by the escapement-wheel.

According to my invention the toothed Wheel which actuatesthe hammer is caused to engage with a small pinion upon the axle of the escapement-wheel, which retards the motion of the toothed striking-wheel, so as to regulate its speed. In the normal position of the parts the pinion on theescapement-wheel doesnot engage with the striking-wheel; but

when this is to be brought into action it is released by a pawl and the teeth are caused to engagewith the pinion. 'Bythis means the fly-wheel and connections commonly used to regulate the speedot the striking apparatus are dispensed with and the power generally wasted in this is 'economized, so that- .timepieces which "areint'ended to go for a long time with one winding can be provided with striking mechanism.

Theaccompanying drawing shows a method of carrying out my invention, in which mechanism for striking the hours is illustrated. I

A is the toothed wheel, which actuates the hammer B in the well-known manner. This wheel in the, construction shown has seventyeight teeth, corresponding to the numberof strokes in twelve hours, in the case of a timepiece striking onlyat the hours, and each of these teeth causes astroke to be given by drawing back the hammer and releasing it. On this wheel is fitted the counting-Wheel O, which may consist of a rim fixed to the rim of the wheel A. This counting-wheelhas twelve teeth 0, arranged successively at distances apart of one, two, three, 850., teeth of the striking-wheel.

Engaging with the teeth of' the countingprovided with. catch e, which engages with the teeth of the wheel A. The lever E is 0perated by thesmall arm f upon the minutewheel F, which at each hour as it passes raises the lever E, releases the catch D from the counting wheel, and engages the catch or pawl c with the striking-wheel A. When the arm f passes the end of the lever, this drops, and the striking-wheel A is released until the catch D engages with the next tooth of the counting-wheel.

The striking-wheel is driven by the drum G, containing a spring and gearing with the toothed wheel 9 upon the striking-wheel; but the method of driving the striking-wheel can be of any well-known kind. Its speedis regulated by the small pinion II upon the escapement wheel 71. This pinion or small toothed wheel does not engage with the teeth of the striking-wheel when thelatter is in its normal position, held by the catches D or e, as the distance bet ween the teeth of the wheel A issut'ficient to allow the pinion to operate without engaging when in a position intermediate between the two teeth. Immediately,

however,jthe wheelA is released and is driven by the drum G or other means the pinion engages with the. teeth and allows the wheel to travel only at the required speed, so that the strokes of the bell are at regular intervals. I

The drawing shows an arrangement for striking the hours only; but it is of course to be understood that a similar apparatus is applicable to striking at either one-half or one-quarter hour orat other intervals, the arrangement required for this being well known and forming no part of my invention.

\Vhat Iclaim as my invention, and desire to secure by Letters Patent, is

1. In striking apparatus for timepieces, a

small pinion or toothed wheel upon the esthe combination with a small toothed wheel In testimony whereof I have signed my upon the escapement-wheel, of a toothed name to'this' sgecification in the presence of 10 striking-wheel actuating the hammer and two subscribing witnesses. means for en a ing and releasing the strik- 5 ing-wheel at E118 required points causing its LEISER LEVI VOLPO' teeth to engage the small toothed wheel when Witnesses:

required, substantially as herein described 7 JOSEPH JAMAL, v and shown. CHARLES ALEXANDER HoRNsTEIN.

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