An Improved Tool for Expanding and Contracting Rings and the like.
Year: 1895

page_text: Date of Application, 7th Mar., 1895
Complete Specification Left, 3rd Dec., 1895-Accepted, 25th Jan.,
1896
PROVISIONAL SPECIFICATION.
An Improved Tool for Expanding and Contracting Rings and
the like.
I ALFRED PERKINS of 42 Taylor Street Woolwich in the County of Kent
Jeweller, do hereby declare the nature of this invention to be as follows:--
The object of this invention is to cuable the diameter of finger rings short tubes
and the like to be easily increased or diminished without injury to the material of
which such articles are composed.
Now according to this invention I provide a cylinder of steel or other suitable
material the said cylinder terminating in an external cone at one end and in
an internal cone at the other end. The cylinder is bored to receive a spindle having
a bemispherical or other suitably shaped head. To expand a ring the spindle is
removed from the cylinder the ring placed on the external cone the spindle replaced
with the head resting on the ring. One or two light blows with a hammer on the
head of the spindle suffices to expand the ring to the required size.
To decrease the diameter of a ring the spindle is reversed and the ring placed in
the internal cone and driven into the said cone by means of a few blows on the
head of the spindle. Or the tool may be placed under a press instead of using a
hammer.
If the ring or the like, is sufficiently large to drop over the cone so far as to be
below the end of the cone I interpose a washer hollowed out on one side between
the ring and the head of the spindle.
The same washer being slightly coned on the opposite side is used for a similar
purpose when the ring or the like to be contracted drops so far into the internal
cone so as to clear the head of the spindle.
A
E
1002
T. E. HALFord,
11 Furnival Street, Holborn, E.C., Agent for Applicant.
An Improved Tool for Expanding and Contracting Rings and
the like.
I ALFRED PERKINS of 42 Taylor Street Woolwich in the County of Kent
Jeweller do hereby declare the nature of this invention and in what matiner
the same is to be performed, to be particularly described and ascertained in and
by the following statement :-
The object of this invention is to euable the diameter of finger ringa short tubes
and the like to be easily increased or diminished without injury to the material of
which such articles are composed.
Now according to this invention I provide a cylinder of steel or other suitable
material the said cylinder terininating in an external cone at one end and an

page_text: Having now particularly described and ascertained the nature of my said inven-
Lion, and in what manner the same is to be performed, I declare that what I
claim is:-
:-
1. A tool for expanding and contracting rings consisting of a cylinder having an
external coue at oue end and an internal cone at the other end in combination
with a spindle having a head at one end adapted to fit over the external cone
substantially as hereinbefore specified and for the purpose stated.
2. In a tool for expanding and contracting rings and the like the combination of
a cylinder a having an external cone at one end and an internal cone c at the other
end and a parallel bored with a cylindrical spindle f fitting the bored and.
provided with a head g all substantially as herein before specified and shewo by the
accompanying drawings.
3. In a tool for expanding and contracting rings the combination of a cylinder a
having a parallel bore d and terminating in external and internal cones bc with a
cylindrical spindle fitting the bore d and having a head g and one or more
washers i all substantially as hereinbefore specified and shewn by the accompanying
drawings.
4. The improved tool for expanding aud contracting rings and the like-
constructed as herein before specified and shewn by the accompanying drawings.
Dated this 3rd day of December 1895.
T. E. HALFORD,
11 Furnival Street, London, E.C., Agent for Applicant.