IMPROVEMENTS IN WATCHES
Year: 1876

page_text: LETTERS PATENT to Charles Louis Aulagnier, of Bedford Street, Strand, in the
County of Middlesex, for the Invention of " IMPROVEMENTS IN WATCHES."
A communication from abroad by Vve. de J. Soldano, fils, of Geneva,
Switzerland.
Sealed the 21st December 1876, and dated the 22nd June 1876.
COMPLETE SPECIFICATION filed by the said Charles Louis Aulagnier at the
Office of the Commissioners of Patents on the 22nd June 1876.
CHARLES LOUIS AULAGNIER, of Bedford Street, Strand, in the County of
Middlesex. "IMPROVEMENTS IN WATCHES." A communication from abroad by
Vve, de J. Soldano, fils, of Geneva, Switzerland.
"
"
This Invention relates to the "stopwork' of the mainspring in a watch.
Heretofore the "stop finger" has been fastened by a small pin on the "square" of
the "barrel arbor" outside the "barrel cover," and the "stop wheel" has turned
upon a collet and been secured by a screw which passed through the said collet.
According to this Invention the "stop finger" is done away with and the "stop
wheel is turned by a strong pin fixed on the face of the "nut on the "barrel
arbor," said "stop wheel" being "snapped on" a strong collet sunk in the inside of the
barrel cover." Thus the collet upon which the "stop wheel" turns not being
weakened by the screw hole, as heretofore, will withstand any pressure which may
be brought upon it in winding without any liability to breakage, and the weakness
in the stop finger and mode of fixing will be avoided.
"
This Invention will be clearly understood by reference to the accompanying
Drawings and the following particular description :-
:-
Fig. 1 represents a top view of the barrel with "cover" in position; Fig. 2,
a like view with barrel "cover" removed; Fig. 3, view of under side of "barrel
cover," and Fig. 4, diagram of working parts.
a is the "stop wheel; " b, pin fixed on face of the nut c; d, barrel arbor;"
e, collet, on which stop wheel a is "snapped." The barrel cover fis recessed
on the under side, as shown at g, Fig. 3, to the depth of the height of the pin b
and thickness of stop wheel a. The stop wheel a is divided at a¹ and the collet e
is formed with a "
bevil" (or larger on its face) to allow of the said stop wheel
being "snapped" and retained on said collet, as will be well understood. The

page_text: "pitch" of the gear teeth of the barrel is indicated by the broken line h, and the
other working parts of the watch will be unaltered. When the watch is "wound
up" in the direction of the arrow, Fig. 4, on each revolution of the "nut" c and
"pin" b, the "stop wheel" a will be turned one tooth forward until the pin b will be
stopped by contact with the plain part of the stop wheel a, as shown in said Fig. 4,
and on the watch running down the stop wheel a will be turned one tooth at each
revolution of the nut c and pin 6 in the opposite direction, until the pin b will be
stopped by the plain part on the opposite side of the stop wheel a.
Having now described the nature and particulars of the said Invention, I claim
the improvements in watches, substantially as herein described and shewn by the
Drawings.
In witness whereof, I, the said Charles Louis Aulagnier, have hereunto set
my hand and seal, this Eighth day of June, in the year of our Lord One
thousand eight hundred and seventy-six.
CH. L. AULAGNIER. (L.S.)