Improvements in Escapements for Time-Pieces Page: 2 of 3
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UNITED STATES PATENT OFFICE,
ABNER G. LAUGHLIN, OF PARIS, TEXAS, ASSIGNOR O ONE-IIALF OF HIS
RIGHT TO STEPHEN G. HUDDLE.
IMPROVEMENT IN ESCAPEMENTS FOR TIME-PIECES.
Specification forming part of Letters Patent No. 220,849, dlate October 21, 1879 application filed
July 12; 1879.To all whom it may concern:
Be it known that I, ABNE G. LAUGIILIN,
of Paris, in the county of Lamar and State of
Texas, have in voted certain new and useful Im-
provements in Escapements for Time-Pieces:
and I do hereby declare the following to be a
full, clear, and exact description of the inven-
tion, such as will enable others skilled in the
art to which it pertains to make and use it,
reference being had to the accompanying draw-
ings, which form part of this specification.
My invention relates to all improvement in
escapements for time-pieces.
It consists in the arrangement and combi-
nation of parts whereby the lever and duplex
escapements are combined together, as will be
more fully described hereinafter.
Figure 1 is a front view of my invention, a
portion of the frame-work being removed so
as to show the operating parts. Figs. 2, 3, 4
are detail views of the same.
a represents a common train of wheels such
as are used in time-pieces, and which may be
of any desired construction.
The last one, c, of the large wheels meshes
with a pinion on the shaft d, which shaft has
secnred to it the disk or scape-wheel e, which
has a number of studs, q, projecting from its
side, as shown. This scape-wlheel may be mod-
ified to suit any train of wheels.
Securedtoaspecial shaft, fwhich is mounted
in special bearings, is a lever, h, which is made
heavy at its lower end and light all the way
beyond its shaft to the other end. Through
the lighter and longer end are made the two
holes j k, so that the shaft on which the wheel
c is placed and the shaft d can pass through
the openings, and thus allow the lever to vi-
brate freely back and forth withoutinterfering
with them in any manner.
Projecting from opposite sides of the hole k
are the two curved arms 1, which have their
points or ends on the side next to the disk or
scape wheel e thickened for a short distance,
so as to form lever-pallets of any desired angle,
and thus give any desired degree of impulse
from one or both pallets of the lever, and alter-
nately act as stops to the studs g as the disk
revolves around. Just as one end releases onestud the other end catches another, nild brings
the disk to a momentary stop while the lever
h makes one of its vibrations.
The small end of the lever has a recess, ,
in it, and oin each side of this recess there pro-
jects outward an arm, o, which is made con-
cave on its outer side.
The lever may be made in any other form to
suit the special train of wheels it is designed
for, so that it has the two lever-pallets de-
scribed.
The shaft r, to which the balance-wheel P
and spring q are fastened, has a curved arm,
s, against which the studs g on the disk or
scape-wheel e alternately strike, and thus give
the shaft an impetus in one direction, which
the spring instantly counteracts as soon as the
arm is released, and moves the shaft backward
in the opposite direction, receiving a lever-
impulse ill that direction, and the opposite arm
again catches another stud on the scape-wheel.
Projecting from the side of the hub of the
balance-wheel 1) is a aarm, v, which, as the
curved aria s is moving backward to be caught
by another stud, enters the recess n in thle end
of the lever, and thus causes it to move as far
in one direction as the shaftr turns; and then,
as the shaft moves backward, this arm c forces
the lever to move backward again. Thus the
arm on the shaft operates the escapemenut-le-
ver, and gives it its vibratory motion.
The shaft r is cut squarely away through
one-half of its thiekness, just over the recess
n in the end of the lever, so that as the shaft
rocks back and forth this square portion will
always catch the two corners of the lever, and
the round portio of the shaft will roll in each
of the concave portions of the arm o.
Where the shaft r is not out away any sud-
den impulse will cause the lever h to move with
such force at its longest end as to become en-
tirely detached from the shaft, and thus cause
the stoppage if not the breakage of the works.
Where the shaft is cut away and made just
broad enough to span across the concave por-
tions o, as shown in Fig. 2, the shaft forms a
dead stop to any further movement of the lever
in that direction. With such a positive stop
to the movement of the lever at the end of
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Laughlin, Abner G. Improvements in Escapements for Time-Pieces, patent, October 21, 1879; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth169910/m1/2/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.