Year: 1886

page_text: Date of Application, 2nd July, 1886.
Complete Left, 4th Apr., 1887.
Complete Accepted, 6th May, 1887.
hereby declare the nature of my said invention to be as follows:—
The object of my invention is to manufacture an improved form of wood worker's
cramp, in which simplicity, handiness reduction of weight and cheapness are
combined.
In carrying out my invention I dispense with the usual bars, and lengthening bars,
and substitute therefor any handy piece of timber, or other convenient matorial, to
which I temporarily affix my improved cramp.
The cramp consists of a rectangular frame, preferably made of malleable cast iron,
forming three sides of a rectangle. A suitable screw passes through one leg of
this frame, the male thread of which fits into a female thread formed in such leg.
A prolongation of the screw spindle, without any thread, passes through a plain hole
in the opposite leg of the U frame. The outer end of the spindle is fitted with a cap
which acts as a washer between the spindle and the "stuff" to reduce friction, when
the screw is being driven.
The head of the screw is fitted with any convenient means for turning the same
with sufficient force.
"
"
The frame of the cramp is fitted with a suitable screw (usually called a wood
screw). This screw is preferably fitted to one of the legs of the frame, but may be
otherwise placed to effect the same purpose.
In using this cramp, the screw is caused to enter a suitable hole in the piece of
timber, whereby it is firmly fixed thereto. A stop of any kind is fixed to the same

page_text: timber at any required distance: the material to be cramped is then placed between
the frame and the stop the screw is then turned towards the "stuff" until the
required compression is obtained.
The form of the frame may be varied, and the position of the screw, or the
substitution therefor of a gripping appliance, and other obvious mechanical equivalents
may be adopted; and the materials of which the cramp is made may be suited to the
kind of work for which it is intended to be used, and may consist of brass, iron, steel,
or other suitable metal.

page_text: 1 RICHARD MELHUISH of 85 and 87 Fetter Lane, in the City of London, do
hereby declare the nature of my said invention and in what manner the same is
to be performed, to be particularly described and ascertained in and by the following
statement:
The object of my invention is to manufacture an improved form of wood-worker's
cramp, in which simplicity handiness, reduction of weight, and cheapness are
combined.
In carrying out my invention I dispense with the usual bars and lengthening bars:
and substitute therefor any handy piece of timber or other convenient material to
which I temporarily affix my improved cramp.
And in order that my said invention may be particularly described and ascertained,
reference is hereby made to the accompanying drawings in which similar letters of
reference indicate corresponding parts.
Fig. 1 is an elevation, shewing one form of my invention. Fig. 2 is an elevation
shewing a modification of that shown in Fig. 1 and Fig. 3 is a horizontal section on
the line ab of Fig. 2.
c, c¹, c³, is the body of the cramp, forming three sides of a rectangle, and
preferably made of malleable cast iron, d d is the spindle having a screw thread at d
which corresponds with the female thread d³ formed in the leg c². The front end d² of
the spindle is plain and fits into a plain hole in the leg c. The outer end of the
spindle is fitted with a cap d' (shewn in section in Fig. 2) which acts as a washer
between the spindle and the material to be cramped, when the screw is being driven.
The head of the screw is fitted with a bar e or any other convenient means for turning
the same with sufficient force. The log is provided with a screw f (commonly
known as a
"wood" screw) which is driven into a suitable hole made in the timber.
In Fig. 2 the top c¹ of the cramp is shewn flat, so as to form a convenient anvil,
and a plate c is added for securing the cramp to the timber by means of ordinary
wood screws, passing through the holes 9 g Fig. 3) the screw f shewn in Fig. 1 being
thus rendered unnecessary.
In using the cramp it is firmly secured to the timber by either of the means above
described (according to its construction). A stop of any kind is fixed to the same
timber at any required distance: the material to be cramped is placed between the
frame and the stop the screw d is then turned towards the™“stuff” until the required
compression is obtained.

page_text: The form of the frame may be varied, and the position of the screw, or the
substitution therefor of a gripping appliance by cam or eccentric action, and other
obvious mechanical equivalents may be adopted; and the materials of which the
cramp is formed may also be varied to suit the kind of work for which it is intended
to be used, such as brass, iron, steel or other suitable material.
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 :—
The manufacture and use of cramps constructed, arranged and operating,
substantially as and for the purposes hereinbefore described and shewn on the
drawings.
GEO. DOWNING,
Agent for Applicant.