An Improved Clamping Device, chiefly designed for Securing the Strings of Tarpaulin Sheets on Railway and other Waggons.
Year: 1892

page_text: Date of Application, 21st June, 1892-Accepted, 30th July, 1892
に
COMPLETE
SPECIFICATION.
An Improved Clamping Device, chiefly designed for Securing the
Strings of Tarpaulin Sheets on Railway and other Waggons.
I, JOHN ADAMSON FINDLAY, of 28 King Henry's Road, in the County of
Middlesex, Engineer, 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 a clamping device or fastener for securing a string or
cord at any required part of its length. The object of my said invention is to
provide a clamping or gripping device which, while allowing the string or cord to
be easily and speedily tightened or slackened or released when desired, will be
capable of holding the said string or cord very securely even when it is subjected
to considerable and varying tension, in such a manner that increasing the tension
upon the string or cord will increase the tenacity with which the same is held by
the said device.
In the accompanying drawings
Figure 1 is a plan.
Figure 2 is a section on the line a Figure 1 and
Figure 3 is an end elevation of a clamping or gripping device constructed'
according to my invention.
Like letters indicate the same parts throughout the drawings.
A is a bracket adapted to be secured by screws passed, through the holes B, to
any suitable support. The bracket A is provided with jaws A in and between
which the cam-lever C is pivoted. This cam lever is preferably provided with
teeth or the like as shewn at C¹ in order that the string or cord D inserted into
the clamp as shown in Figures 2 and 3 may be thereby held without the possibility
of slipping through the clamp when subjected to tension. If desired instead of
forming the cam-lever with teeth I may roughen or form teeth on the part of the
bracket on which the cord or string lies. Or I may provide both the cam-lever
and the bracket with teeth. It is obvious that when the string or cord is properly
placed in the device and the cam-lever is adjusted to the position shown in full lines,
in Figure 2 the stronger the pull on the said string or cord in the direction of the
arrow the more securely will the same be held, but that if the cam-lever C be
turned to the position shewn in dotted lines in Figure 2, the cord will be instantly
released. The cam lever should be weighted as shewn at C2 so that it will always
be pressed into contact with the cord or string in the clamp. In a modification of
my invention the bracket is formed with only one jaw on the side of which the cam
lever is pivoted. The string or cord can then readily be inserted into the clamp
from the side.
Fasteners or clamping devices constructed according to my invention are
peculiarly adapted for securing the strings of waggon sheets or the like though
there are other purposes for which they can also be used.
The devices hitherto used for securing waggon sheets allow the strings to become
loose by reason of the varying stresses to which the said sheets are subjected in
transit and there is then a great danger of their becoming displaced and lost whereas
with my improved device, as hereinabove stated, the more severe the stress upon
the cord or string the more tightly and securely will it he held

page_text: Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what I
claim is :-
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what I
claim is :-
An improved clamping device, constructed substantially as described and for the
purposes specified.
Dated this 21st day of June 1892.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.