Improvements in Scaffold Cramps and the like.
Year: 1897

page_text: Improvements in Scaffold Cramps and the like.
I JOHN EVANS of Victoria House Erwood, in the County of Brecon, Builder,
do hereby declare the nature of this invention to be as follows:-
My invention relates to improvements in cramps for scaffold building and other
like purposes, and may be made any size and strength required, and has for its
object, simplicity, economy, and security.
My said invention consists of two pieces of iron or other metal forged or cast
into semicircular forms, both pieces connected forming a circle having a shank
on each equal in length to about the diameter of circle, the ends of semicircular
parts connected by a hook and eye formed thereon, the shanks connected by a
bolt and nut or rivet, both pieces swivil on bolt or rivet for fixing on pole, the
internal part of circle formed and shank has short teeth formed to grip poles, the
shank has an eye or hook for fastening chain or link, also a part turned upwards
to prevent pole from slipping off.
I, JOHN EVANS, of Victoria House, Erwood, in the County of Brecon, Builder,
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 improvements in cramps for scaffold building and other
like purposes; and may be made any size and strength required, and has for its
object, simplicity, economy and security.
My invention is fully disclosed in the following specification of which the
accompanying drawing forms a part, in which :-
Fig. 1, is a side view of my improved cramp.
Fig. 2, a view at right angles thereto, looking in the direction of the arrow a, in
Fig. 1, and,
Figs. 3, and 4, a view similar to Fig. 1, showing modified forms of construction.
In the drawing forming part of this specification the separate parts of my
improvements are designated by the same letters of reference in each of the views,
and in the practice of my invention, I provide a cramp for the purpose herein
[Price 8d1

page_text: specified, reference being made to Fig. 1; which consists of two semicircular or
segmental jaws A, and B, the first of which is much longer than the other, and the
said jaws are provided with shanks a, and b, respectively, which are pivotally con-
nected at C, and the outer end of the jaw A, is provided with an eye D, which is
adanted to receive a hook E, formed on the jaw B.
The shank a, is provided with an inclined flat end a 2, in which is formed a hole
or opening a 3, and the shank b, is provided with an arm 62, which projects at right
angles thereto, and the said arm 62, is preferably provided on its upper side with
teeth or projections 3, and similar teeth or projections 6 4, are preferably formed
on the side of the shank B, adjacent thereto, the object of these teeth or projec-
tions being to assist in holding a board, pole, bar or other article on the shanks a,
and b.
Passing through the jaw B, is a set screw G, provided with a cross head or
handle g, and the object of the set screw G, is to secure the cramp to the pole or
other article with which the cramp is connected.
It will be understood that the cramp is adapted to be suspended from a scaffold
pole, and the weight of the load suspended by the shank a, and b, respectively,
serves to more securely lock the jaws A, and B, together, and also causing the
cramp to embrace the pole by the teeth H, H, and the object of the hole or opening a 3
in the end of the jaw A, is to provide means for suspending other cramps there-
from, the said other cramps being connected by means of a chain or link with the
end of the shank b, as will be readily understood.
The jaws A, and B, are provided on its inner side with teeth or projections H. H,
so as to enable the cram to be more securely locked to a scaffold nole, and in
Figs. 3, and 4, I have shown modified forms of construction, adapted to be con-
nected with poles or other supports, which are angular or oval in cross section, and
otherwise, this form, of construction may be the same as that herein before described.
My improvement is simple in construction and operation, and perfectly adapted
to accomplish the result for which it is intended, and it will be apparent that
changes in, and modification of construction herein described, may be made with-
out departing from the spirit of my invention, or sacrificing its advantages.
Having now particularly described and ascertained the nature of my said in-
vention, and in what manner the same is to be performed, I declare that what I
claim is:-
-
A cramp for the purpose herein described. The said cramp consisting of two
jaws, each of which is provided with a shank and teeth, the said shark being
pivotally connected, and one of the said shank being provided with an arm, which
projects at right angles thereto, one of the said jaws being provided with an eye or
opening at the end thereof, and the other with a hook which is, adapted to pass
therethrough, one of the said jaws being also provided with a setscrew which
passes therethrough, and the shank of one of the said jaws being also provided
with a hole or opening in one end thereof, substantially, as shown and decribed.
101
C
1007