CERTAIN IMPROVEMENTS IN KRYLESS AND STOP WORK EMPLOYED IN CHRONO- GRAPHS AND OTHER SIMILAR TIMEKEEPERS FOR THE MEASUREMENT OF FRACTIONAL PORTIONS OF TIME
Year: 1869

page_text: LETTERS PATENT to Richard Watson, of Birmingham, in the County
of Warwick, Chronometer Maker, and Benjamin Dangerfield, of
West Bromwich, in the County of Stafford, for the Invention of
"CERTAIN IMPROVEMENTS IN KRYLESS AND STOP WORK EMPLOYED IN CHRONO-
GRAPHS AND OTHER SIMILAR TIMEKEEPERS FOR THE MEASUREMENT OF
FRACTIONAL PORTIONS OF TIME."
Scaled the 9th July 1869, and dated the 14th January 1869.
PROVISIONAL SPECIFICATION left by the said Richard Watson and
Benjamin Dangerfield at the Office of the Commissioners of
Patents, with their Petition, on the 14th January 1869.
We, RICHARD WATSON, of Birmingham, in the County of Warwick,
Chronometer Maker, and BENJAMIN DANGERFIELD, of West Bromwich,
in the County of Stafford, do hereby declare the nature of the said

page_text: Invention for "CERTAIN IMPROVEMENTS IN KEYLESS AND STOP WORK EMPLOYED
IN CHRONOGRAPHS AND OTHER SIMILAR TIMEKEEPERS FOR THE MEASUREMENT OF
FRACTIONAL PORTIONS OF TIME," to be as follows:-
The object of this Invention is to provide a simple and effectual means
of stopping and starting the piece to which these improvements may be
applied, to reduce the parts employed in keyless pieces, and in an
easy manner to set the hands to their normal position, and to re-wind
the piece.
Hitherto in order to stop and start the piece several actions of a com-
plicated nature have been required, but in our Invention this is effected
by providing a toothed wheel having contrite or upright teeth or pins,
acted upon on one side by a spring chick, which being pressed by the
push picco drives the toothed wheel one space. On the other side a
spring detant acts on the upright teeth or pins of the wheel, and the
said detant carrying a small spring, is allowed to descend on the balance
by means of the revolution of the toothed wheel. The alternate move-
ments of the wheel allows the detant to descend and then lifts it, and
the stopping and starting of the piece is thus effected.
The next part of our Invention relates to setting the hands to their
normal position, and the re-winding of the piece. We carry this into
effect by providing. a rack which represents the segment of a circle,
one part being furnished with teeth for the centre work, and the
other part with teeth for the main wheel. The said rack is connected
with the nib outside the case. By sliding the nib the watch is re-
wound, and the hands, set to their normal or any other desired position
on the dial.
The next part of our Invention relates to the winding wheel placed on
an eccentric disc, which is to prevent a watch from being damaged by
being wound the wrong way. We furnish a wheel which is mounted in
an eccentric manner on a disc,, and is so placed that if wound the wrong
way it is thrown out of action, and so, damage to, tho watch is prevented i
but upon being afterwards wound in a proper direction, the proper action
is restored..
The next part of our Invention relates to keyless work. We carry

page_text: inside limb; thus we obtain direct action both for winding and setting
the hands, and tho said winding wheel being fitted on an eccentric tho
usual broguet action is furnished.