Year: 1887

page_text: Date of Application, 2nd Dec., 1887
Complete Specification Left, 18th Aug., 1888
Complete Specification Accepted, 14th Sept., 1888
1, ERNEST DE PASS, of 68 Fleet Street, in the City of London, Fellow of the Institute
of Patent Agents, do hereby declare the nature of this Invention to be as follows:-
This invention consists in the combination of very simple, solid, and cheap elements
to form a good working mechanism for all kinds of stem winding and setting
watches.
In the accompanying drawings, Fig. 1 is a plan view of the stem-winding mechanism,
as it would appear when the dial is removed. Fig. 2, and the portion in section in
Fig. 1, show the arrangement of the hand-setting mechanism. In both figures
similar letters refer to similar pieces or parts.
The plate A of the works is provided with a circular groove A¹, in which an annular
rack B, provided with inside interior click teeth is free to work; three screws, fixed
to the plate have their heads projecting over the rack B to prevent its leaving the
groove A. Upon the square part of the stem C, there is placed a sliding pinion D,
having, on the one hand, a range of click teeth d¹, and on the other hand a range of
ordinary teeth . A double-armed spring E bears by its arm el upon the upper edge
of the groove of the sliding pinion D, and by its other arme, which has the form of
a click, it bears upon the toothed range of B. The axis F, of the main-spring barrel is
provided with a toothed wheel G, engaging into the teeth of the rack B. The toothed
range d' being pressed into the toothed range of B by the spring el, it results that, if
the stem be turned in the direction shown by the arrow in Fig. 1, the main spring
will be wound up, the rack B being turned in the direction of the arrow and causing
thereby the rotation of the wheel G. If the stem be turned backward the sliding
pinion works like a click. To set the hands it is necessary to have the toothed
range put into gear with the wheel H. For this purpose there is fixed underneath

page_text: the plate A, that is to say between the plate A and the spring barrel bridge a lever L
(Fig. 2) having a pivot l, and a hook 1, the latter engaging into the groove of the
sliding pinion D. A. pusher M, bearing upon the lever, allows the pinion D to be
put into gear with the wheel H so as to cause the hands to be shifted by turning
the stem.
Data: Dub 1007
Improvements in Keyless Watches.
I, ERNEST DE Pass, of 68 Fleet Street, in the City of London, Fellow of the Institute
of Patent Agents, do hereby declare the nature of this invention and in what manner
the same is to be performed to be particularly described and ascertained in and by
the following statement (reference being had to the drawings which accompanied the
Provisional Specification) that is to say :-
This invention consists in the combination of very simple, solid, and cheap elements
forming a good working mechanism for all kinds of stem-winding and setting
watches.
In the drawings, left with the Provisional Specification, Fig. 1 is a plan of the
stem-winding mechanism as it would appear when the dial is removed. Fig. 2, and
the portion in section in Fig. 1, show the arrangement of the hand-setting mechanism.
In both figures similar letters refer to similar pieces or parts.
The plate A of the works is provided with a circular groove A', in which an annular
rack B, provided with interior click teeth, is free to work; three screws b, fixed to the
plate have their heads projecting over the rack B so as to prevent its leaving the
groove A¹. Upon the square part of the stem C, there is placed a sliding pinion D
having, on the one hand, a range of click teeth d¹, and on the other hand a range of
ordinary teeth d².
A double armed spring E bears by its arm e¹ upon the upper edge
of the groove of the sliding pinion D, and by its other arm e², which has the form of
a click, upon the toothed range of the rack B. The axis F of the mainspring barrel
is provided with a toothed wheel G engaging into the teeth of the rack B. The
toothed range being pressed into the toothed range of the rack B by the spring e', it
results that if the stem be turned, in the direction shown by the arrow in Fig. 1, the
mainspring will be wound up, the rack B being turned in the direction of the arrow
and thereby causing the rotation of the wheel G. If the stem be turned backwards
the sliding pinion works like a click.
To set the hands, it is necessary to have the toothed range 62 put into gear with the
wheel H. For this purpose there is fixed underneath the plate A, that is to say

page_text: between the plate A and the spring barrel bridge, a lever L (Fig. 2) having a pivot 1,
and a hook L, the latter engaging into the groove of the sliding pinion D. A
pusher M, bearing upon the lever L, allows the pinion D to be put into gear with the
wheel H, so as to cause the hands to be shifted by turning the stem.
Having now particularly described and ascertained the nature of the Inven-
tion I claim, as communicated to me by my foreign correspondents:
:-
The combination of the sliding pinion D on the one hand, with the spring E, the
rack B (having interior click teeth) and the toothed wheel G, and on the other hand
with the lever L and pusher M substantially as described and shewn.
Dated this 13th day of Auonet 1000