Improvements in Mechanism for Stem Winding Watches.
Year: 1892

page_text: Date of Application, 27th Dec., 1892
Complete Specification Left, 27th Oct., 1893—Accepted, 23rd Dec., 1893
PROVISIONAL SPECIFICATION.
Improvements in Mechanism for Stem Winding Watches.
I HENRY ROBOTTOM of Rose Cottage Over Whitacre in the County of Warwick
Watch Maker do hereby declare the nature of this invention to be as follows:-
I fix on the shaft that goes through the pendant an inclined disc. In front of
this disc I place a lever screwed on to the plate with an adjusted screw so that it
may move backwards and forwards easily. On this lever I mount a small steel
roller exactly opposite and to press against the inclined disc. On the end of the
lever I mount a ratchet paul which engages and disengages with a ratchet wheel on
the barrel arbor when the button is turned the watch is wound.
For setting the hands I fix on the end of the shaft that goes through the pendant
a crown pinion and by pressing the button forward it causes the crown pinion to
gear with a wheel connected with the hands. For barrels on the left of the pendant
use an excentric cam instead of an inclined disc.
COMPLETE SPECIFICATION.
Improvements in Mechanism for Stem Winding Watches.
HENRY ROBOTTом Rose Cottage Over Whitacre Warwickshire Watch Maker
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:-
I fix on the shaft that goes through the pendant an inclined disc in front of this
disc I place lever screwed on to the plate with an adjusted screw so that it may
move backwards and forwards easily on this lever I mount a small steel roller
exactly opposite and to press against the inclined disc. On the end of the lever
I mount a ratchet paul which engages and disengages with a ratchet wheel on
barrel arbor. When the button is turned the watch is wound. For setting the
hands I fix on the end of the shaft that goes through the pendant a crown pinion
and by pressing the button downwards it causes the crown pinion to gear with a
wheel connected with the hands. For barrels on the left of the pendant I use an
excentric cam instead of an inclined disc.
I have worked out several arrangements affecting this action but I prefer those
shown in the accompanying drawings.
Fig. 1 shows a pillar plate with a lever a, fastened to the plate with an adjusted
screw. Mounted on this lever is a steel roller b, pressing against an inclined disc c
(which is drawn from the roller so that a better view may be obtained) by means
of a spring d, acting on an arm of ratchet paul f, by which means it is kept in
position so that when the button is turned either backwards or forward it causes a
traverse motion and the ratchet paul f being in gear with the ratchet on barrel
arbor square causes the barrel arbor to revolve and wind the main spring.
Fig. 2 shows another arrangement. On the inside of the pillar plate is a groove G
in this groove I plant a sliding ratchet paul H, so arranged as to move backwards
and forwards easily. The ratchet paul H acting on the teeth of ratchet K that is
fixed on the barrel arbor square. When the button is turned the crank roller L
operates on the end of ratchet paul H and causes a traverse motion and winds the
main spring. The ratchet paul is kept in position by two springs M and N.
Fig. 5 shows the outside of pillar plate Fig. 2 with the ratchet on barrel arbor
square the ordinary ratchet paul and spring.

page_text: Fig. 3 shows a similar mechanism to Fig. 1 the barrel is on the opposite side of
pendant and a crank lever is used instead of a straight one.
Fig. 4 shows the inside of a pillar plate with a lever S screwed on to said
plate with an adjusted screw, a roller P, and slot U. The slot. U is made to
allow the ratchet paul R (as shown in Fig. 6) to be screwed on to lever S from
the outside of pillar plate. The parts and action being the same as shown in
Fig. 6 it need not be described further.
Fig. 6 is the outside of a pillar plate with a lever S screwed on to the said
plate with an adjusted screw so that it may work upwards and downwards easily.
On one end of lever is a roller P on the other end is a ratchet paul R. When
the button is turned either way the roller P acting against the inclined disc
causes the ratchet paul R to move upwards and downwards, in the upward motion
the ratchet on the barrel arbor square is pulled round by the ratchet pawl R,
and by this action the main spring is wound. The hands are set by pressing the
button down the pressure causing the pinion on the end of the shaft Fig. 7 to
gear with a nut connected with the hands.
Fig. 7 shows the inclined disc with a pinion on the end for setting hands.
Fig. 8 shows the crank shaft L and the sliding ratchet paul H drawn from
Fig. 2 so that a better view may be obtained.
For setting hands I fix on the end of the shaft of either the inclined disc or
the crank roller a pinion as shown on Fig. 7 so that when the button is pressed
down and held in that position the pinion gears with a nut or pinion v exactly
opposite the pendant as shown in Fig. 3 the button then being turned the hands
are moved in the required direction.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is :-
:-
In improvements in keyless mechanism the particular arrangements of parts for
winding and setting watches substantially as herein set forth and shown upon the
accompanying drawings.
Dated this 26th day of October 1893.
HENRY ROBOTTOM.