An Improved Escapement for Watches, Clocks, and the like.
Year: 1896

page_text: Date of Application, 4th May, 1896-Accepted, 11th July, 1896
COMPLETE SPECIFICATION.
An Improved Escapement for Watches, Clocks, and the like.
I, FRANZ SCHERZINGER of Westleigh, Burlescombe, Devon, 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 :-
This invention relates to escapements of the kind known as chronometer watch
escapements, and the object is to provide a simpler, more durable and easier made
arrangement than any at present in use, and which shall be equally as applicable
to a common lever clock as to a watch. My invention also entirely avoids the
great objection to the ordinary chronometer escapement which if subjected to
rough usage, jerks or concussion goes out of order, and will not start until the
watch receives a turn so as to set the balance in motion again.
In order that my invention may be the more readily understood I make reference
to the accompanying sheet of drawings in which Fig. 1 shews an ordinary
chronometer watch escapement and Fig. 2 my improved escapement. In Fig. 1
a is the escapement wheel, b the unlocking stone, c the detent, d the gold spring,.
the nose, the detent spring, g the support for the detent, h the impulse roller,
i the impulse pallet, j the unlocking roller, k the unlocking pallet. In my escape-
ment shewn at Fig. 2 a¹ is the escape wheel, h¹ the impulse roller. The impulse is
given by a pallet and the unlocking effected by the pin ¹ projecting from the
impulse roller, there being no unlocking roller in my improved escapement. In
place of the detent c, I have a lever carrying the light spring d projecting
slightly beyond the end of c' so as to come in contact with pink. The lever e
works on a
pivot at land has attached. to it the hair spring m which (after pin k¹.
has passed the end of spring d¹), draws the opposite end of c¹ back until it touches
the stop n. The pipe holding the locking stone in the ordinary chronometer watch
escapement I replace by a circular disc o carrying the locking ruby or stone p
having a circular face whose centre is coincident with that of the axis of the
pin on which o is pivotted. Instead of the disc o and locking ruby p I sometimes
use a semicircular block such as is shewn at 9 Fig. 3, and instead of the hair
spring m for bringing the end of lever c¹ in touch with stop n, I sometimes use a
light straight spring as shewn at Fig. 4.
I do not restrict myself to the precise details configuration, relative proportions
or disposition of parts as described in this specification or shewn in the drawings as
any or all of them may be considerably varied without departing from the spirit of
my invention.
Having now 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 :-
1. An escapement in which is substituted for the usual spring detent of the
chronometer watch escapement a pivotted lever having attached to its length a
spring one end of which is locked and unlocked by a pin on the unlocking roller
and the other end immediately after unlocking being brought into contact with a
stop by means of a spiral or straight spring, the locking being performed either by
a circular faced ruby or other stone standing up on a circular disc having its axis
coincident with that of the pivot, or by a semicircular block similarly centered, the

page_text: whole substantially as described in the above specification and exemplified by
the accompanying drawings.
2. The combination of parts acting together and forming an escapement
substantially as described in the above specification and exemplified in the
accompanying drawings.
Dated this 30th day of April 1896.
HUGHES & YOUNG,
23, Coleman Street, London, E.C., Agents for the Applicant.