Improved Watchmakers' Roller Extractor.
Year: 1890

page_text: Date of Application, 8th Dec., 1890-Accepted, 24th Jan., 1891
COMPLETE SPECIFICATION.
Improved Watchmakers' Roller Extractor.
A communication from FRANKLIN HARDINGE, of 9, King Street West, in the City
of Toronto, in the County of York, in the Province of Ontario, Canada,
Watchinaker.
I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
M.I.M.E., 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 :-
The object of the invention is to design a roller extractor in which the jaws for
gripping the roller are independently adjustable, and will accurately grasp a roller of
any size, so as to bring the balance-staff exactly on a centre line with the punch; and
it consists of two jaws connected to or forming part of two arms angularly supported
by two sleeves attached to or formed in the body of the tool which contains the
balance-staff punch, the centre line of the said punch passing through the centre of
the parting between the two jaws which are curved to fit behind the roller and
are elastically held in position by spiral springs substantially as hereinafter more
particularly explained.
Figure 1 is a perspective outside view of this improved roller extractor.
Fig. 2 is a sectional elevation of same.
A is the body of the roller extractor through the centre of which a hole is made to
receive the punch B. A screw a is cut upon the punch B and passes through the
nut C held in a recess made in the body A as indicated so that by turning the said
nut the punch B will be longitudinally adjusted. The sleeves D form part of the
body A and are set at an angle so that their centre lines shall intersect each other at
the point where the centre line of the punch B passes. Within these angularly set
sleeves D are placed the arms or bars E and between the bottom of each arm E and
the bottom of its respective sleeve D is placed a spiral spring F. For each arm or
bar E is also provided a knob G which passes through an elongated hole made in the
sleeve D as indicated. A jaw H is attached to or formed upon the end of each arın
or bar E; the ends of the said jaws H being bent so that their points shall meet in a
horizontal plane.
As this tool is designed for the purpose of punching out or extracting the roller
with its ruby-pin off the balance-staff, for the purpose of this description a balance-
staff I is shown seated on the point of the punch B and the curved jaws H inserted
between the roller J and the balance K. When in this position it is merely necessary
to turn the nut C so as to force the point of the punch B upwardly and thus force
the staff I out of the roller J which may thus be easily extracted without injuring it
or the ruby-pin L which is so desirable to retain.
Owing to the shape of the jaws H and the angular position in which they are held
they will fit behind the roller J no matter how closely to the balance K it may be
located. For the same reason the jaws H cannot be spread open no matter how great
the pressure of the punch B may be against the end of the staff I-in fact the
greater the pressure the more securely will the jaws hold the roller J.
Owing to the action of the springs F and to the angular position of the arms or
bars on which the jaws H are formed the said jaws are readily adjusted so as to fit
behind any sized roller J and they will automatically adjust themselves so that the
centre line through the punch B will pass through the point where the centre lines of
the arms E intersect each other; consequently the staff I will be held perfectly
straight with the centre line of the punch B.
I should have mentioned that the knob G screwed into each arm or har E may be

page_text: used as a pinch screw to lock its respective arın or bar when it has been properly
adjusted to suit any particular size of roller.
Having now particularly described and ascertained the nature of the said inven-
tion as communicated to me by my foreign correspondent, and in what manner the
same is to be performed I declare that what I claim is :-
1. A punch B adjustably held in the body A in combination with adjustable arms
or bars E with their curved jaws H the said arms or bars E being held at such an
angle that their centre lines shall intersect upon the centre line of the punch B sub-
stantially as and for the purpose specified.
2. The curved jaws H fixed to or formed upon the arms or bars E the angularly
located sleeves D formed to receive the bars E in which the spiral springs F are
inserted in combination with the adjustable punch B located so that its centre line
shall pass through the intersection of the centre lines of the arms E substantially as
and for the purpose specified.
Dated this 8th day of December 1890.
W. P. THOMPSON & BOULT,
Agents for the Applicant.