Improvements in and connected with Clamps for Holding Work to Benches and the like.
Year: 1899

page_text: Date of Application, 12th Sept., 1899-Accepted, 28th Oct., 1899
COMPLETE SPECIFICATION.
Improvements in and connected with Clamps for Holding Work to
Benches and the like.
I, EDWARD ARNOLD, of " Hill View," Norwich Road, Bournemouth, in the
County of Hants, Wood Carver and Cabinet Maker, do hereby declare the nature
of this invention and in what manner the same is to be performed to be parti-
cularly described and ascertained in and by the following statement:-
This invention relates to clamps such as are used for temporarily affixing
work or materials to be operated upon benches or other surfaces; such clamps
being commonly used for the purpose of holding wood to be carved, or other-
wise cut in suitable predetermined designs. It consists of an extremely simple
form of clamp, which can be applied without injury to the bench, and can be
moved to fresh positions without trouble.
In order to use the clamp it is necessary to bore any convenient number of
small holes in the bench top, in which fits easily the shank of the clamp; this,
when it is tightened (by screwing) down upon the work causes the shank to
incline slightly from the vertical position, and thus become jammed against one
side of the top of the hole and the opposite of the bottom. This gripping is
rendered more secure by forming serrations or milled ridges upon one or both sides
of the shank of the clamp.
In order that my invention may be fully understood and ascertained, I append
drawings in which:-
Fig. 1 is an elevation of a clamp in position, the bench being shewn in
section.
Fig. 2 is a plan of the clamp jaw.
Fig. 3 is an elevation of same.
Fig. 4 is an elevation of a modification.
X indicates the bench top which may be of any convenient thickness, and
which has any convenient number of vertical holes Z bored through it of such
size as to fit the shank of the clamp.
The clamp is formed of two parts, the shank A and the head A¹, the two being
formed integrally of steel or other metal and disposed at or about right angles
to each other; and the clamp jaw B, which is flat and grooved on its underside
to fit the head A¹; the groove b is formed along almost its whole length. The
jaw at one end 6 is shaped so as to engage with the work, (indicated in Fig. 1
by the letter Y) and grips it firmly when fixed; and it has a slit 62 formed in it
of such size as to admit freely a screw C; which passing down through this slit,
screws into a hole which is bored in or near the end of the head A' of the clamp.
The screw C is preferably formed with a head c of such shape as to be conveniently
turned by hand.
It will be seen that to use the clamp, all that is necessary is to place the work
in position upon the bench top or other surface, and insert the clamp shank in
either of the holes Z, which is convenient; then by turning the screw C, the
bench top, the clamp, and the work are simultaneously fixed rigidly together in
Price 8d1

page_text: such manner that carving, moulding, boring or any other operation can be
carried on upon the work without risk of moving it from its position or
damaging the work. This is secured by the shank A becoming slightly inclined
from the vertical position and thereby gripping the sides of the hole.
In general I find it advantageous to form milled ridges a upon one or both
sides of the clamp shank A; in the drawing two of these are shewn. They
assist in rendering the grip of the shank more secure.
The clamp head A¹ is preferably tapered as shewn, but this is not essential,
as the same effect may be produced by disposing the head at an angle, which
varies slightly from a right angle..
In some cases the shank A may be of such a size as to fit the holes closely,
and have its exterior formed with a screw thread, which engages with the hole.
This is shewn plainly in Fig. 4, which is self-explanatory.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, I hereby declare
that what I claim is:
1. The combination with a bench top having one or more suitable holes formed
in it, of a clamp constructed, and capable of being operated substantially as
shewn and disposed.
2. A bench clamp, constructed substantially as shewn and described with
reference to the accompanying drawings.
3. The combination with a bench top having one or more suitable holes
formed in it, of a clamp consisting essentially of a shank and a head formed
integrally with each other, and a jaw which is fixed to the clamp head by a
screw or screws, substantially, as shewn and described.
4. In a bench clamp, the combination of the shank A, the head A', the jaw B
having a groove by and a slit 2, and the screw C substantially, as shown and
described.
a
5. In a bench clamp the combination of the shank having serrations
formed upon it, the head A', the jaw B having a groove b, and a siit 62, and the
screw C, substantially, as shewn and described.
6. In a bench clamp, the combination of the shank A having a screw thread
formed upon it, the head A¹, the jaw B having a groove b and a slit b², and the
screw C substantially, as shewn and described.
Dated this 11th
0
1000
W. H. MURCH,
Claremont Street, Oldhill, Agent for the Applicant.