ROLL-CHRONOMETER ESCAPEMENT FOR WATCHES AND CHRONOMETERS
Year: 1884

page_text: I, EMIL CAPITAINE of 89 Chancery Lane in the County of Middlesex, Engineer,
do hereby declare the nature of my Invention for ROLL-CHRONOMETER ESCAPEMENT
FOR WATCHES AND CHRONOMETERS, and in what manner the same is to bo
performed, to be particularly described and ascertained in and by the following
statement:-
This roll-chronometer escapement consists of a vertical-wheel, an axle-tree with
rolls (roll-axle-tree) reversing gear fork on an axle-tree and a roll with pin at the
axle-tree of the balance.
The vertical wheel A, A, Fig. I, II, has simple teeth a, a, a ... the surface of
which fixes line a₁, a₁, in the front, and the line a, a, at the back. On the roll-
axle-tree B Figs. I, II, III, there is below a spiral roll b with spiral spring by at
the spiral-stud brr.
According to the construction of the reversing gear c, c₁, Fig. IV or e, e, Fig. VIII
at the reversing-gear-fork C the roll D fixed to the roll-axle-treo B has either a
tooth Fig. 1II or a slide s Fig. IV. The upper roll E at the roll-axle-treo B
Fig. III, IV has a notch d.
The reversing-gear-fork C, Figs. I, II, V, VI, VII, is fixed to the axle tree C₁L
Fig. II. The fork C, is seized by the pin g on the roll g of the axle-tree of the
balance h, Figs. I, II, and the oscillations of the balance cause a reversing c, Cr,
contrary to the fork. This reversing gear c, C, Fig. VI, consists of two jaws c,
and c, which are so far from each other that there remains sufficient scope between
the tooth a. Fig. VI, shews the escapement when at rest; here the pin g is kept
in the direction of the line m, m, by the balance-spring at the balance axis h, and
in the same direction also the tooth between the reversing-gear-jaws c and c, by
means of the spiral-spring at the roll-axle-tree. If the fork is led to the right by
the pin g Fig. V the revolving of the rolls E and D to the left follows and then the
tooth comes to lio upon the round surface of the jaw c, pressed against it by the
spiral-spring b by which the fork is kept in its position so long until the pin g
retourns, after the balance has made a oscillation, falls in between the two prongs of
Price Adl

page_text: the fork, and turns the fork to the left. This revolving of the reversing-gear-fork
Fig. VII causes the tooth z to fall into the opening of the two jaws, and comes at
last to lie upon the round surface of the jaw C which causes the turning of the
roll D likewise the roll E with the notch d to the right. At the beginning of the
turning of the fork can by the pin g to the left Fig. VII the tooth of the vertical-
wheel a is found upon the roll E next the notch d and with the continued equal
turning the same falls into this notch and passes the roll whereupon the impulse is
imparted. Exactly the same process takes place when the slide a is employed at
the roll-axle-tree B Fig. IV, VIII.
The reversing-gear is done here by means of a lever ee with the pin t; the
turning of the roll-axle-treo B towards the two sides is performed by the pin t, that
reaches into the slide. The roll G (the platenu) at the axle-tree h h Fig. I, II of
the balance has an incission k beside the pin g. At the escapement of the
chronometer in full activity to tooth of the vertical wheel a falls into this
incission k, and on the round stone q within, and in deet at every sicond motion
(oscillation) of the balance.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the samo is to be performed, I declaro that what
I claim is
The form, construction and combination of all the described parts of the escape-
ment as they appear in the Drawing and quite particulary: "the Invention of the
insertion of the axle-tree B with the rolls E and D, spiral spring b, and tooth <
between the vertical-wheel A. A and the reversing-gear cc, at the reversing-gear-
fork C."
Dated this 6th day of June 1884