AN IMPROVED HOLD-FAST FOR WORK-BENCHES
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
I EDMUND EDWARDS of the firm of Edwards and Co:- Patent Agents and
Engineers, of 35 Southampton Buildings, Chancery Lane, in the County of
Middlesex do hereby declare the nature of the invention for "AN IMPROVED
HOLD-FAST FOR WORK-BENCHES " to be as follows:-
1
This invention relates to hold-fasts for holding the work on work-benches used
by carpenters and other workmen, and it has for its object a novel method of
constructing such hold-fasts by which the work can be held firmly without the
use of a hammer, and at the same time a regular pressure without shock is obtained.
In order to put the invention in operation, I make one or more holes in the
ordinary work-bench in a convenient position, and I take a vertical bar which can
fit freely through such hole, its upper end above the work-bench being bent round
at right angles and provided at its outer end with a joint, which forms the fulcrum
upon which turns a lever constituting the hold-fast itself. The front end of this
lever is made of such a shape that when pressed down upon the work it holds the
latter firmly between itself and the work-bench.
The other end of the lever is provided with a joint in which turns a vertical
excentric or cam having a suitable handle formed upon or attached to it by which
it can be turned round for a sufficient distance. The edge of the cam fits and
works upon the upper end of the vertical bar or in a groove in the latter, in such
manner that when the handle is turned down and outward the end of the lever is
forcibly raised and its other end depressed. In order to use the hold-fast described
the workman having fitted the vertical bar into one of the holes in the work-bench
at a proper height, and placed the hold-fast end of the lever upon the work which
is to be held, then takes the handle of the excentric and turns it outward and down
until the hold-fast is forced upon the work with sufficient pressure, which may be
made greater or less according to the space through which the handle is moved.
In order to release the work the excentric is turned by the handle in the opposite
direction.
DEAL 1
A Tn
1007

page_text: COMPLETE SPECIFICATION.
I, EDMUND EDWARDS, of the firm of Edwards and Co:- Patent Agents and
Engineers, of 35, Southampton Buildings, Chancery Lane, in the County of
Middlesex do hereby declare the nature of the invention for "AN IMPROVED
HOLD-FAST FOR WORK BENCHES" and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following statement and
accompanying drawing :—
This invention relates to hold-fasts for holding the work on work-benches used
by carpenters and other workmen, and it has for its object a novel method of
constructing such hold-fasts by which the work can be held firmly without the use
of a hammer or mallet, and at the same time a regular pressure without shock is
obtained.
In the accompanying drawing, which is in illustration of the invention, figure 1
is a front view showing the hold fast closed, that is to say not exerting any pressure
upon the work. Figure 2 is a similar view showing it open and exerting its
greatest pressure. Figure 3 is a plan.
In order to put the invention in operation, I make one or more holes a¹ in the
ordinary work bench a in a convenient position, and I take a vertical bar which can
fit freely through such hole, its upper end c, c¹¹, above the workbench being bent
round at right angles and provided at its outer end with a joint c', which forms the
fulcrum upon which turns on the pin d¹ a lever d constituting the holdfast itself.
The front end of this lever at f is made of such a shape that when pressed down
upon the work b it holds the latter firmly between itself and the workbench a. The
other end of the lever d is provided with a joint d" in which turns on the pin ell a
vertical excentric or cam e having a suitable handle p formed upon or attached to
it by which it can be turned round for a sufficient distance.
The edge of the cain e fits and works upon the upper end of the vertical bar at c¹¹
or in a groove in the latter, in such manner that when the handle p is turned down
and outward the end of the lever d¹¹ is forcibly raised and its other end d is
depressed. In order to use the holdfast described the workman having fitted the
vertical bar into one of the holes a¹ in the workbench a at a proper height, and
placed the holdfast end of the lever at f upon the work b which is to be held, then
takes the handle p of the excentric e and turns it outward and down until the hold-
fast fis forced upon the work with sufficient pressure, which may be made greater
or less according to the space through which the handle is moved. In order to
release the work the excentric e is turned by the handle p in the opposite direction.
The improved holdfast may be made of any size of iron or other suitable material
and the proportions of the several parts may be varied and modified to suit the
circumstances under which it is to be used.
Having now particularly described and ascertained the nature of my said
Invention, and in what manner the same is to be performed, 1 declare that what
I claim is:
The combination of the excentric or came with the lever d, d", turning upon the
centre d', substantially as and for the purpose described and shewn in the drawing.
Dated this 5th day of November 1884