Balance Staff and Wheel for Watches Page: 2 of 2
[1], [1] p. : ill. ; 23 cm.View a full description of this patent.
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UNITED STATES PATENT OFFICE.
GEORGE G. BUGBREE, OF GONZALES, TEXAS.
BALANCE STAFF AND WHEEL FOR WATCHES.
SPECIFICATION forming part of Letters Patent No. 227,726, dated May 18, 1880.
Application filed October 1, 1879.
To all whom it may concern: The staff c is formed with upper and lower 45
Be it known that I, GEORGE G. BUGREE, of pivot-shoulders, as usual, and next to the upper
Gonzales, in the countyof Gonzales and State pivot shoulder is formed tapering, as at 3, of
of Texas, have invented a new and useful Im- a size to fit the tapering hole of the collet b.
5-provement in Balanuce Staff and Wheet for The collet will be connected by inserting its
Watches, of which the followingisaspecifica- shouldered portion into the central aperture 50
tion. of tfie wheel and riveting down the counter-
Heretofore balance-staffs for watches have sunk end, so that the collet will be rigidly
been made inl onepiece with the collet rigidly held. The staff is attached by insertinl its
to attached to the staff, and the collet formed tapering portion 3 into the tapering hole ofthe
with a countersunk end for entering the bal- collet and wedging it securely to place by a 55
anee-wheel center, the parts being attached slight tap with a hammer upon a hollow punch
firmly by riveting down the countersunk end placed against the lower pivot-shoulder of the
of the collet. With this construction the staff. The parts will be thus firmly attached,
I5 work of replacing a broken staff with a new and the staff may be readily removed by plue-
one involves considerable labor and risk of in- ing a hollow punch against the upper pivot- 60o
jury to thel balance-wheel. shoulder and giving it a light tap, thus per-
The object of my invention is to construct mitting a new staff to be placed without the
and fit these parts in such manner that a bro- labor of refitting the collet or risk of stretch-
20 ken stalf may be replaced with littlelabor and ing or otherwise injuring the wheel.
expense and without risk of injury to the I The tapering end of thestaff may be formed 65
wheel; and my invention consists, first, il at- with a screw-thread, as shown in Fig. 3, to fit
taehing the collet permanently to the bal- a corresponding thread in the taperinglhole of
ance-wheel; and, second, in connecting the the collet, and, if desired, a nut may be used
25 staff thereto bya wedge or screw joint, where- with a screw-threaded staff to connect the
by the staff is rendered adjustable and may be parts. 70
readily removed. I do not limit myself to any especial means
The invention will be described more par- for holding the staff to the collet whereby it
ticularly with reference to the accompanying may be readily removed.
30 drawings, wherein- Having thus fully described my invention, I
Figure 1 is an elevation showing the wheel, claim as new and desire to secure by Letters 75
collet, and staff separated, in enlarged size. Patent-
Fig. 2 is a cross-section of the wheel with the 1. A balance-staff for watches fornell .with
collet attached. Fig. 3 is all elevation of the a tapering end, in combination with collet
35 staff in modified form. having tapered hole, as shown and described.
Similar letters of reference indicate corre- 2. A balance-wheel for watches having the 80
spending parts. collet b formed with or attached to it, the col-
a is the balance-wheel; b, the collet, and c let being formed with a tapering hole for re-
the staff. The collet b is formed with the ceiviug the staff, substantially as described
40 countersunk shouldered portion 1 of a diame- and shown.
ter for fitting snugly within the central aper- GEORGE G. BUGBEE.
ture, 2, of wheel a, and through the center, Witnesses:
lengthwise of the collet, is drilled or formed a ED TIT'ooB,
tapering hole. E. F. BATTE.
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Bugbee, George G. Balance Staff and Wheel for Watches, patent, May 18, 1880; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth169991/m1/2/?q=%22watches%22: accessed June 5, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.