.AN IMPROVED FLOOR, SASH, AND BENCH CRAMP
Year: 1875

page_text: LETTERS PATENT to Caleb Hodson, of Wolverhampton, in the County
of Stafford, Manufacturer, for the Invention of ".AN IMPROVED
FLOOR, SASH, AND BENCH CRAMP."
Sealed the 27th July 1875, and dated the 1st February 1875.
PROVISIONAL SPECIFICATION left by the said Caleb Hodson at the
Office of the Commissioners of Patents, with his Petition, on the
1st February 1875.
.
I, CALEB HODSON, of Wolverhampton, in the County of Stafford,
Manufacturer, do hereby declare the nature of the said Invention for
"AN IMPROVED FLOOR, SASH, AND Bench CRAMP," to be as follows:―
The essential features of this Invention are to provide a double grip
for holding the joists, and an improved slide for the bolt, to which the
driving screw is, as usual, permanently attached.
I provide the usual driving screw, which works in a frame of ordinary
construction, except that the customary slot for the insertion of a spanner
is dispensed with, as in my Invention none is required.

page_text: At the back of the frame are placed two eccentric rollers, which are to
give the double grip before spoken of, and the joist being placed between
them they are brought together by one or both of the said rollers being
turned by a handle or by other convenient means.
The improvement in the slide of the frame before mentioned consists
substantially in providing a slot or groove in the said frame in which the
slide may be free to travel, and this in a more convenient manner than
formerly.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Caleb Hodson in the Great Seal Patent Office on
the 29th July 1875.
'
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, CALEB
HODSON, of Wolverhampton, in the County of Stafford, Manufacturer,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the 1st day of February, in the year
of our Lord One thousand eight hundred and seventy-five, in the
thirty-eighth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said Caleb Hodson, Her special
licence that I, the said Caleb Hodson, my executors, administrators,
and assigns, or such others as I, the said Caleb Hodson, my executors,
administrators, and assigns, should at any time agree with, and no
others, from time to time and at all times thereafter during the term
therein expressed, should and lawfully might make, use, exercise, and
vend, within the United Kingdom of Great Britain and Ireland, the
Channel Islands, and Isle of Man, an Invention for "AN IMPROVED FLOOR,
SASH, AND BENCH CRAMP," upon the condition (amongst others) that I; the
said Caleb Hodson, my executors or administrators, by an instrument in
writing under my, or their, or one of their hands and seals, should
particularly describe and ascertain the nature of the said Invention,
and in what manner the same was to be performed, and cause the
same to be filed in the Great Seal Patent Office within six calendar
months next and immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Caleb Hodson, do hereby declare
the nature of my said Invention, and in what manner the same is to be

page_text: performed, to be particularly described and ascertained in and by the
following statement (that is to say) :-
The essential features of this Invention are to provide a double grip
for holding the joists, and an improved slide for the bolt, to which the
driving screw is, as usual, permanently attached.
•
I provide the usual driving screw, which works in a frame of ordinary
construction, except that the customary slot now generally employed
for adjusting the grip is dispensed with, as in my Invention none is
required.
At the back of the frame are placed the two eccentric rollers, which
are to give the double grip before spoken of, and the joist being placed
between them they are brought together by both of the said rollers being
turned by a handle or by other convenient means.
i
The improvement in the slide of the frame before mentioned consists
substantially in providing a slot or groove in the said frame in which
the slide may be free to travel, and this in a more convenient manner
than formerly.
Fig. 1 is a plan; Fig. 2, a side elevation; and Fig. 3, an inverted
plan of a cramp constructed according to my Invention.
a is the driving screw, working in the frame b, and having a handle c
by which it is turned, and the collars d, d, to prevent end movement;
e is the slide, one end of which, f, is tapped to receive the driving screw,
the other end, g, having an enlarged head for pressing against the board
or other article which is to be forced into position; h is a longitudinal
groove or slot in the frame b, within which the projecting portion i of
the slide e travels, and thereby guides and keeps steady the slide e;
k, k, are two eccentric rollers turning upon studs 1, 1, and having
handles m, m.
The action of the cramp when used in cramping floor boards is as
follows: The cramp having been placed upon the top of a joist the
handles m, m, are moved towards each other so as to cause the joist to
be gripped between the notched surface of the eccentric rollers k, k.
The cramp being thus anchored to the joist the driving screw a is turned
and the head g of the slide e is thereby forced outwards so as to compress
the floor board which is being operated upon closely against the adjoining
floor board, in which position the first named floor board is nailed down,

page_text: .
and the cramp is then removed to another.joist. The eccentricity of the
notched rollers k, k, causes them to grip the joist more firmly in pro-
portion as the increasing pressure of the screw tends to drive the cramp
backwards along the joist.
Having now described the nature of my Invention, and the manner
in which it is to be carried into effect, I desire it to be understood that
what I claim as the Invention to be protected by the herein-before in-
part recited Letters Patent is,
First. The arrangement of parts whereby a double grip is obtained
upon the joist or other portion of framing, substantially as and for the
purpose herein-before described and as illustrated in the accompanying
Drawings.
Second. The slot h in the frame b, in which the slide a is free to
travel, substantially as herein-before described and as illustrated in the
accompanying Drawings.
In witness whereof, I, the said Caleb Hodson, have hereunto set my
hand and seal, this Twenty-seventh day of July, in the year of
our Lord 1875.