Improvements in Keyless Watches.
Year: 1894

page_text: Date of Application, 30th Mar., 1894
Complete Specification Left, 14th Dec., 1894-Accepted, 19th Jan., 1895
ITIVATION.
Improvements in Keyless Watches.
I, WILLIAM EHRHARDT, of Barr Street, Hockley, Birmingham, in the County
of Warwick, Chronometer and Watch Manufacturer do hereby declare the nature
of this invention to be as follows:-
My invention has for its object to simplify the mechanism for effecting the setting
of the hands of keyless watches and consists of the arrangement of parts
bereinafter described for effecting that object.
The winder besides having the ordinary rotary motion is capable of a sliding
motion that is a motion in the line of its axis. The axis of the said winder carries
a cone upon the inclined surface of which the end of a lever parallel with the axis
of the winder bears. When the said winder is pushed inwards the said cone retires
from off the outer end of the lever and the said end of the lever no longer pressed
by the cone rises by the action of a spring. The inner end of the said lever
carries a pinion which pinion in the normal position of the lever is situated in a
plane lower than the plane in which the toothed wheel directly driven by the
winder is situated. When however the winder is pulled outwards its cone bearing.
on the lever described raises that end of the lever carrying the pinion into the
plane in which the toothed wheel driven by the winder is situated the said pinion
is thereby geared with the said toothed wheel and also with a train of wheels
connected with the hands of the watch. At the same time the pinion by which
the winding mechanism is connected to the toothed wheel driven by the winder
requires to be thrown out of gear. This is effected by means of an incline situated
on the upper side of the spring herein before referred to which incline on the
raising of the spring acting on the inclined end of a lever carrying the gearing
pinion of the winding mechanism throws the said winding mechanism out of gear
simultaneously with the throwing into gear of the hand adjusting mechanism. By
now turning the winder the hands of the watch can be adjusted.
Dated this 30th day of March 1894.
W. T. WHITEMAN,
Agent for the Applicant.
I WILLIAM EHRHARDT, of Barr Street, Hockley, Birmingham in the County
of Warwick, Chronometer and Watch Manufacturer do hereby declare the nature
of my invention and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement :-
My invention has for its object to simplify the mechanism for effecting the
setting of the hands of keyless watches and consists of the arrangement of parts
hereinafter described for effecting that object.
The winder besides having the ordinary rotary motion is capable of a sliding
motion, that is, a motion in the line of its axis. The axis of the said winder
ED

page_text: When
carries a cone upon the inclined surface of which the end of a lever (hereinafter
called the set-hand lever) nearly parallel with the axis of the winder bears.
When the said winder is pushed inwards the said cone retires from off the outer
end of the set-hand lever and the said end of the lever no longer pressed by the
cone falls by the action of a spring. The inner end of the said lever carries a
toothed wheel which toothed wheel in the normal position of the set-hand lever is
situated in a plane lower than the plane in which the minute wheel is situated
which set hand lever wheel constantly gears with the winding wheel.
however the winder is pulled outwards its cone bearing on the set-hand lever
described raises that end of the lever carrying the toothed wheel into the plane in
which the minute wheel is situated; the said toothed wheel is thereby geared
with the said minute wheel and also with a train of wheels connected with the
hands of the watch. At the same time the toothed wheel by which the winding
mechanism is connected with the toothed wheel mounted on the barrel arbor driven
by the winder requires to be thrown out of gear. This is effected by means of an
incline situated on the upper side of the set-hand lever herein before referred to
which incline on the raising of the set-hand lever acting on the inclined end of a
lever (hereinafter called the rocking bar) carrying the gearing wheel of the winding
mechanism throws the said winding mechanism out of gear simultaneously with the
bringing into gear of the hand adjusting mechanism. By now turning the winder
the hands of the watch can be adjusted.
Figure 1 of the accompanying drawing represents partly in front elevation and
partly in section, the winding and hand setting mechanism of a keyless watch
constructed according to my invention the said mechanism being in position for
winding;
Figure 2 represents the same mechanism in position for setting the hands;
Figure 3 is a vertical section on the line x, x Figure 1 and Figure 4 is a section
on the line y, y Figure 1;
Figure 5 is a back elevation of the mechanism
Figure 6 represents a portion of Figure 4 drawn to a larger scale ;
Figure 7 is a similar section to Figure 6 the parts being in position for setting
the hands of the watch;
Figure 7 is a plan of Figure 7;
Figures 8 and 9 represent parts of the mechanism detached.
The same letters of reference indicate the same parts in the several figures of
the drawing.
a is the winder the axis or stem a of which has upon its lower end the cone a³.
When the mechanism is in the position represented in Figures 1, 3, 4, 5 and 6, the
winder a is in gear through the bevil pinion b, toothed wheels c and d with the
toothed wheel e on the barrel arbor and the watch can be wound up in the usual
way. The toothed wheel d is carried by the rocking bar f, f turning upon the
disc q (see Figure 8).
When the mechanism is in the position represented in Figures 2 and 7 the
winder a is in gear, through the bevil pinion b, toothed wheels c, g and h, with the
toothed wheel on the hands spindle and the setting of the hands can be effected
by turning the winder a. The toothed wheels c and g are constantly in gear.
The change of position of the moveable parts of the mechanism from that
represented in Figure 1 to that represented in Figure 2 is effected by the cone a³
and set-hand lever k turning on the axis 7. A nearly horizontal arm k on the
upper end of the set-band lever k rests on the surface of the cone a³ and the lower
end of the set-hand lever carries the toothed wheel g herein before referred to.
When the winder a is pulled outwards the cone a³ acting on the arm k² of the
set-hand lever k forces the said arm in the direction of the arrow in Figure 6 and
turning it upon its centre / raises the toothed wheel g from the plane represented
in Figures 1, 4 and 6 into the plane of the wheel has represented in Figures 2
and 7. At the same time an incline k³ on the lower arm of the set-hand lever k
acting on the arm f2 of the rocking bar f, turns the said rocking bar on the
2

page_text: disc and throws the toothed wheel d out of gear with the toothed wheel e on the
barrel arbor e (see Figure 2). On pushing the winder a into its normal position
the arm k² of the set hand-lever k is kept to its bearing on the cone as by means of
the spring m and the toothed wheel d is again put into gear with the toothed wheel e
by means of the spring p. The toothed wheel g has a small disc spring n under it
for permitting it to yield if when raised its teeth come under the teeth of the
minute wheel h so that on turning the winder a the said toothed wheel
will at
once be thrown into gear with the said minute wheel h.
Having now particularly described and ascertained the nature of my inven-
tion and in what manner the same is to be performed I declare that I claim as my
invention of " Improvements in keyless watches
;-
The mechanism hereinbefore described and illustrated in the accompanying
drawing for effecting the setting of the hands of keyless watches by the action of
the winder alone, the said mechanism consisting essentially in the combination with
a set-hand lever carrying at its lower end a toothed wheel, of a cone on the winding
stem or axis for effecting the motion of the said set-hand lever on the pulling
outward of the winder, by which motion of the winder and set hand lever the
toothed wheel on the hands spindle is put into gear with the winder and the winder
is simultaneously thrown out of gear with the barrel arbor wheel by the action of
an incline on the said set-hand lever operating on a rocking bar carrying one of the
toothed wheels of the winding train substantially as hereinbefore described and
illustrated.
Dated the Sixth day of December 1894.