An Improved Clamp for Use in Making Picture and like Frames.
Year: 1887

page_text: An Improved Clamp for Use in Making Picture and like Frames.
I GEORGE JACKSON of 25 Whetley Hill Manningham Bradford in the County of
York Cabinet and Picture Frame Maker do hereby declare the nature of this
invention to be as follows:-
Of a centre screw with a wing nut bearing on an horizontal arm with a downward
pressure on the rabbet of the mould to the table having a regulating screw at the
back the centre screw being fixed to the table by means of a collar on the top and
washer and small nut or wing nut underneath enabling one man to nail or fix a
frame together any size and any width of mould with the greatest ease and simplicity
in two or three minutes.

page_text: COMPLETE SPECIFICATION.
An Improved Clamp for Use in Making Picture and like Frames.
I GEORGE JACKSON of 25 Whetley Hill Manningham Bradford Yorkshire 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:-
The object of my invention is to construct a clamp to be used in making picture
and like frames which clamp will enable one frame maker to accomplish work
which was previously done by a frame maker with the aid of an assistant.
To effect this instead of causing the jaw or gripping portion of the clamp to move
in a horizontal direction holding the frame or moulding hereinafter called the
moulding horizontally as is usual I so construct the clamp that the jaw or gripping
portion moves in a vertical direction downward holding the moulding vertically.
And in order that my invention may be fully understood and readily carried into
effect I will describe the accompanying sheet of drawings reference being had to the
figures and letters marked thereon."
Fig. 1 is a side elevation and Fig. 2 is a front elevation of my improved clamp.
a is a portion of a bench to which is secured the screw by the nut c; the bench a
forms the lower jaw of the clamp: d is the movable jaw of the clamp and it slides
loosely on the screw b: e is a set screw which passes through a hole chased or tapped
near the back end of the jaw d and it is turned to raise or lower that end of the jaw
so as to adjust it according to the thickness of the moulding being operated upon :
fis a nut having wings or handles so that it may be readily turned in either direction
to put pressure on the clamp to hold the moulding g or to release it. h is a piece of
wood, preferably held by dowel pins, which is rabbeted at one end to allow for
variation in the thickness of the moulding. The strip h may be dispensed with if
desired.
.
The mode of operation is as follows :-
The set screw is turned to raise or lower the back end of the jaw d so that it shall
be level when its front end rests on the rabbet of the moulding 9: the moulding g is
placed in the position shown on the drawing and the nut is tightened on to the jaw d
thus holding the moulding g securely; the beveled end of the moulding g' is placed
against the end of the moulding g and rests on the rabbeted part of the strip / while
the holes are bored for the nails thus allowing the moulding g' to be drawn up to its
place when the nails are driven home the ends of the moulding are then glued and
nailed together. The four corners of the frame are similarly connected the frame
always being held in a vertical position therefore there is no tendency to open the
joints, as when the frame is held horizontally, and the frame maker requires no
assistant to hold the frame.

page_text: By the use of my improved clamp frames may be made much more quickly and
easily than heretofore and only one operator is required instead of two.
I would have it understood that I do not limit myself to the details herein set forth
as they may be varied or modified without departing from my invention which consists
essentially of a vertically acting clamp.
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 :
1. A vertically acting clamp for holding picture and like frames in a vertical
position during construction.
2. The combination with the bench or jaw a of the movable screw e, fixed screw b,
nut and jaw d or their equivalents for the purpose herein set forth.
3. The combination and arrangement of the parts forming the improved clamp as
and for the pupose herein described and illustrated.
Dated this 26th day of August 1887
C. A. BARLOW,
51, Market Street, Bradford,
Agent.