te
Year: 1890

page_text: Date of Application, 5th July, 1890-Accepted, 6th Sept., 1890
the impulse teeth.
The escapement works in the following manner;—
The pallet of the balance wheel B releases, from its stationary position, the escape-
ment lever C, and thereby the escapement wheel D, which is held still by the pallet k of
the anchor e, is set free and the lever C receives a strong push on its impulse receiver f,
by means of the impulse tooth i arranged on the escapement wheel D.
The impulse thus received is then transmitted, by means of the fork c, to the pallet b
of the balance wheel B.
After the impulse tooth i has slid off the surface of the impulse receiver f, a stopping
tooth h presses upon the pallet of the anchor e, whereby the escapement lever Cas.
well as the escapement wheel D, return to a stationary position, and remain in the
same for a time, until the pallet b of the balance wheel B, on the returning swing of
the latter, is again released from the stationary position, by means of fork c, and the
escapement lever C, and with it also the escapement wheel D: whereupon the above
described operation again takes place.
The following important advantages are attained by the fact, that the stopping teeth
are only used for stopping, whilst for giving the impulse, separate teeth are arranged;
and especially that the impulse receiver projects like a finger from the escapement
lever C, and thus the impulse surface of the same is brought as close as possible to the
axle n of the escapement wheel D.
1st. The easy release of the escapement lever Cor of the escapement wheel D out
of a stationary position, because of the proximity of the pallets k and 7 of the anchor e
to the axle of the escapement lever C.
2nd. Powerful driving impulse, because the distance of the impulse teeth i from the
axis n of the escapement wheel D can be more considerably reduced than that of the
stopping teeth h, in consequence of the arrangement of the finger shaped impulse
receiver f

page_text: 3rd. The loss by friction is slight both in the release as well as the impulse movement,
the movement or swing of the escapement bar (through the closer proximity of the
impulse teeth i and the impulse receiver f to the axis of the escapement wheel D
being comparatively small."
It is of course immaterial whether in place of an escapement wheel D having both
check and impulse teeth, two wheels be employed, one of which bears the check teeth
and the other the impulse teeth; and whether the impulse receiver f forms an integral
part of the escapement lever Cor is made separately and coupled with the same.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, as communicated to me
by my correspondent, I declare that what I claim is :-
In a watch or clock escapement the combination and arrangement of an escapement
lever having a finger like impulse receiver f, of separate check teeth and impulse
teeth i, and of the escapement wheel D or of separate check and impulse wheels on
the same axle, substantially as described, whereby an easier release of the escapement
lever C from the check teeth by means of the pallet 6 of the balance wheel B is
ensured, and a stronger impulse is given by the teeth i to the balance wheel B by
means of the escapement lever C and its finger like impulse receiver f with the least
possible amount of friction.
Dated this 4th day of July 1890)
WM. P. THOMPSON & Co.,
Agents for the Applicant.