Year: 1888

page_text: I, JOHAN PETTER JOHANSSON, of Enkoping, in the Kingdom of Sweden,
Mechanician, 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 :-
:
My invention relates to pipe tongs so disposed that the distance between the jaws
may be easily and speedily increased or diminished in order that the tongs may fit
pipes of different diameters, and that the jaws once adjusted for a determined
diameter may retain their distance when at work, so that the tongs may be used as a
pair of common pipe tongs. The jaws also are so arranged that when compressing
the legs they seize the pipe firmly without damaging it by the pressure of the teeth
of the jaws.
In the accompanying drawing,
Figare 1 is a side elevation of the tongs, and,
Figure 2 is an edge view of the same.
My improved tongs are, as usual, provided with two legs A, B terminating in
toothed jaws A', B₁. The leg B is bifurcated for part of its length and provided
with an outward projection terminating in a screw Con which a nut D may be
easily moved to and fro. The jaw end of the leg A is passed through the recess of
the leg B formed by the bifurcation and held therein by a pin key E. The legs are
mutually connected by means of a stirrup F one end of which is connected to the
nut D upon the projection of the leg B, while the other end clasps the jaw A¹ of
the leg A being there pivotted by a pin G.
When the tongs are to be used the legs A and B are first separated so that the
jaws A and B open. The leg B turns at this operation between the key E and the
pin G on the leg A. The jaws are now caused to clasp the pipe, if the distance
between them be great enough. If not, the nut D is turned upon its screw so that
the distance may be increased by pulling the leg A. The jaws having been placed
at the respective sides of the pipe, the legs are compressed until they have attained
such a distance as is suitable for the diameter of the pipe wanted to be treated,
whereafter the nut D is screwed up to the end of the shell F.

page_text: The legs being then compressed, the jaws clasp the pipe firmly and their teeth are
pressed into the pipe, so that they cannot slip on the surface of the pipe. When
bringing together the legs so that the jaws clasp the pipe there will be a bend
between the pipe and the jaw A¹, the result of which is that the more the force
exerted for turning the pipe, the more firmly will the pipe be clasped by the jaws.
Every time the pipe is released and regrasped the legs are separated and again
closed.
upon which
When using the tongs for another pipe of the same diameter as that
the tongs were last used, no screwing of the nut D is needed but if the pipe is of
another diameter the adjustment herein before described is necessary in order that the
tongs may suit the pipe.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what 1
claim is-
The improved pipe tongs, one leg (B) of which is bifurcated and also provided
with a screw (C) on which works a nut (D), while the other leg (A) is inserted
through the recess formed by the bifurcation of the first leg. and is pivotted to a
stirrup working on the said screw, so that by moving the stirrup to and fro upon
the screw, the distance between the jaws formed on the legs will be increased or
diminished, substantially as hereinbefore described.
Dated the 19th day of December 1888.
•
· G. F. REDFERN & Co.,
4, South Street, Finsbury, London,
Agents for the Applicant.