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Publication numberUS490123 A
Publication typeGrant
Publication dateJan 17, 1893
Filing dateJul 11, 1892
Publication numberUS 490123 A, US 490123A, US-A-490123, US490123 A, US490123A
InventorsGeorges Nicolet
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Georges nicolet
US 490123 A
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Description  (OCR text may contain errors)

(No Model.) v f G'. NIOOLET.


No. 490,123. Pat ted Jan. 1'7, 1893. l J 3&1




SPECIFICATION forming part of Letters Patent No. 490,123, dated January 17, 1893.

Application filed .Tuly l1, 1892. Serial No. 439,695. (No model.)

T0 @ZZ whom t may concern,.-

Beitknown that I, GEORGES NIOOLET,\vatcl1 manufacturer, of Ghaux-de-Fonds, Switzerland, have invented certain new and useful Improvements in Stop-ivatches, of which the 'following is a speciiieat-ion.

The invention refers to that class of stop watches having a hand rotating on the center of the watch and tixed toawheel provided with a projection, pin or thelike which is intended to act once at each revolution of said wheel upon the teeth of the wheel carrying the hand of the minutes counter or recorder, so as to cause one tooth of said wheel to be advanced and the said minute counter hand rotated one division of its special dialor scale.

The invention especially relates to the device for putting the minutes counter wheel out of action when the said minutes counter is not used and moving the same when the minutes counter hand is to be set to zero.

In the accompanying drawings Figure l is an elevation of the face and hands of theimproved watch. Fig. 2 is a plan View of the mechanism as it is to be seen after removing the dial and while the said mechanism is in position for moving the hands. Fig. 8 is a similar plan view when the hands are set to zero. Fig. et shows separately the respective position of the outcut of wheel G and of the iin ger e when the recording hand is to receive its last movement. Fig. 5 shows separately the respective position of the outcutof Wheel G and of the finger' c when the minutes recording hand has fulfilled its work, that is to say, when the minutes recording hand G has been moved its full stroke (for instance from O to 30 in Fig. l). Fig. 6 shows in cross section on an enlarged scale the device for putting the wheel G out of reach of the linger e when the hands are set to zero. Fig. 7 shows a similar cross section in which the wheel G is out of reach of the linger c.

In all the figures the same letters and numerals refer to the same pieces.

A is a wheel fixed on the axis of one of the watch arbors for driving the stop watch mechanism.

Bis an intermediate wheel pivoted to a rocking lever C which is pivoted at c to the plate of the work and bears with its arm C upon the cam D under the action of a spring EX which bears upon the small roller c pivoted to the said lever C. According as the arm C bears into an outcut or upon a full part of said cam D the wheel B is in or out of gear with a wheel E, the axis of which bears the independent seconds hand E.

In Fig. 2 of the drawings the wheel B is shown in gear with wheel E, and in Fig. C it is shown out of gear with said Wheel. both positions the said wheel Bis in gear with the driving wheel A.

The wheel E or the axis of the same bears a projection, finger or pin e intended to cause the wheel G of the minutes recording device to be rotated one tooth at each revolution of said wheel E. The axis g Of the wheel G bears a hand G which moves on a segmental dial or scale H of the watch dial H. Said wheel G has a number of teeth corresponding` to the number of divisions which the scale H would have if it would be a full circle and there is provided an outcut g formed by partly or fully cutting away one or more teeth of said wheel G and disposed so as to arrive in front of thevfinger or pin c at the moment the hand G reaches the end of the scale H', that is to say, in the case shown in the drawings at the moment the hand G reaches the number 30. The hand remains then in place, the finger or pin e passing in front of the wheel G without acting upon its teeth as shown in Fig. LL. rlhen the wheel G is stopped and the hand G remains in the said position until it is set to zero. This operation is performed by means of a hammer or lever J which falls upon a heart cam K when the projection j falls into an outcut of the cam D. Nowitwill be easily understood that if the setting to Zero of the hand G takes place While the iinger or projection eis in the path of the teeth of wheel G, the latter would not be able to follow the impulse given to its heart piece K while having its teeth meeting the said finger or projection e. I therefore provide a lever J iixed to the hammer or 1ever .l and having a bevelj which slides upon the top of the axis g somewhat before the hammer J strikes the heart piece K.

Fig. 6 shows the beveled part of the lever J and the axis g of wheel G as they stand when the stop mechanism is going, the wheel Gbeing in reach of the finger or pin e. Fig. 7


shows the same parts when the beveled part of the lever J has depressed the axis g so as to place the Wheel G out of reach of the tinger or pin e.

There is provided a springtl in a recess tot the plate for lifting the arbor and Wheel G when the leverJis retracted. It will no\vbe readily understood that the Wheel G being thrown into the position of Fig. 7 before the hammer J meets the heart piece K, the rotation of said wheel G in either direction for setting the hand G to zero, will take place Without having the teeth of the wheel G meeting the finger or pin e.

An arm 5 of the leverJacts 011 a heart ca 6 on the arbor of the independent seconds hand E to return the latter to zero as usual.

I claim as my invention.

l. The combination with the independent seconds hand and its arbor, of a projection rotating with such hand, a minutes recording hand and a wheel therewith connected and receiving a movement from said projection of one tooth each rotation of the independent seconds hand, a heart cam and lever for returning the minutes recording hand to zero, and push mechanism and an incline and spring for giving an end movement to the arbor of the minutes recording hand to clear the wheel thereof from the projection and to bring the heart cam into the path of itslever, substantially as specilied.

2. The combination with the independent seconds hand and. its arbor, and a projection revolving therewith, of a minutes recording hand, a segmental scale therefor and a toothed wheel connected with said hand and acted on by such projection, there being a notch in the Wheel whereby its movement is stopped when the hand reaches the end of the segmental scale, and mechanism substantially as specitied for returning the hand to zero, as set forth.

In testimonywhereo lhave signed myname to this specication in the presence of two subscribing witnesses.




Referenced by
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US3686881 *Jul 27, 1970Aug 29, 1972Ruhla Uhren Veb KChronograph mechanism
US7215603 *May 26, 2004May 8, 2007Seiko Epson CorporationClocking apparatus
US7364352 *Feb 21, 2003Apr 29, 2008Seiko Epson CorporationTime measurement device and method
EP1528444A1 *May 26, 2004May 4, 2005Seiko Epson CorporationDevice and method of timing