Improvements in Holding or Supporting Devices for Gas-pipes and the like.
Year: 1893

page_text: Date of Application, 28th Nov., 1893-Accepted, 20th Jan., 1894
COMPLETE SPECIFICATION.
Improvements in Holding or Supporting Devices for Gas-pipes
and the like.
I, HEINRICHI MORK, of Crefelderstrasse 434, Duisburg on the Rhine, Germany,
Locksmith, 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 :-
is
The apparatus shown on the accompanying drawings, for jointing gas-pipes etc.,
consists of a trestle a, which is provided at the top with toothed jaws arranged in
the form of a fork b. The length of pipe or the like article to be operated upon
laid horizontally between the jaws, as shown in the drawings, and there held firmly
in position by means of the pawls c toothed and mounted on the jaws so as to turn
on pivots. The bevelled teeth of the pawls cand jaws are set in opposite
directions, so as to prevent the pipe from being turned either to the right or to the
left; and moreover the greater the effort to turn the pipe, the faster is it held, so
that the simple dropping of the pawls upon the pipe suffices to hold it firmly. For
the purpose however of preventing any outward yielding of the forked jaws they
may alternatively be connected together by the spring device consisting of the bent
arms d and d', which, when the pawls are not in use, hang down outside the trestle
(as shown in dotted lines on the drawing), but when the pawls are applied, assume
a vertical position somewhat inclined towards each other; and by means of a ring r
slipped over them and pressed down, they exert a pressure on the pawls c and link
the jaws b together so as to strengthen their grip on the pipe.
Any other convenient or suitable means for keeping the parts in position during
the operation may also be employed in substitution for that described.
According to the different dimensions of the pipes etc. to be dealt with, the pins
which fix the pawls on the jaws and serve as pivots for them require to be movable,
an adjustment which is made by means of a series of holes s provided in each jaw.
On the hinder part of the trestle is fitted a forked vertical stay or support f
corresponding to the fork of the jaws in form and height, and acting as a rest for
the pipe-length in hand. If the pipe is of considerable length, one or more forked
vertical supports with tripod-stays at foot such as g, may also be used to carry it.
To strengthen the trestle-legs they are joined together by braces or straps t,
suitably attached; these may be weighted, and at the same time used as a frame to
carry the necessary tools in use.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is;-
"
1. A "bold-fast" appliance for gas-pipes and the like in which the pipe is held
firmly and prevented from turning by two forked and toothed jaws such as b in the
angle between which the pipe is laid the jaws being firmly fixed to a framed trestle
in combination with two adjustable toothed pawls such as c the bevelled teeth of
jaws and pawls being cut in opposite directions so as to grip the pipe firmly
substantially as described and illustrated in the accompanying drawings.
2. The combination with the appliance indicated in Claim 1 in which for holding
the pawls in position when operating the said pawls care fitted with a spring device
consisting of two arms such as d and d¹ so arranged as to assume when the pawls

page_text: are engaged a vertical position somewhat inclined to one another so that they may
be drawn together by pushing down the ring r which embraces them substantially
as described and illustrated in the accompanying drawings.
Dated this 28th day of November 1893.
W. P. THOMPSON & BOULT,
Agents for the Applicant.