IMPROVEMENTS IN ADJUSTABLE CRAMP OR CLAMP TOOLS
Year: 1877

page_text: LETTERS PATENT to Charles Neil, of Sheffield, in the County of York, Tool
Maker, for the Invention of "IMPROVEMENTS IN ADJUSTABLE CRAMP OR
CLAMP TOOLS."
Sealed the 21st December 1877, and dated the 11th July 1877.
PROVISIONAL SPECIFICATION left by the said Charles Neil at the Office
of the Commissioners of Patents on the 11th July 1877.
CHARLES NEIL, of Sheffield, in the County of York, Tool Maker.
MENTS IN ADJUSTABLE CRAMP OR CLAMP TOOLS."
"IMPROVE
My Invention refers to cramp or clamp tools capable of being adjusted in any
desired position with the greatest facility, affording great security when fixed and
resisting strength; for this purpose the movable jaw is free to slide on the bar, the
back of the adjustable jaw is provided with a roller free to turn on a spindle in
recess at back of the jaw; there is a wedge or key piece having by preference.a
roughened base, with hook at pointed end to take under recess to prevent its
slipping out while traversing the jaw along the bar.
To use the cramp, slide the jaw to the required position on the bar, then push in
the wedge or key piece under the wheel, and the jaw is fixed; to release the jaw,
raise and pull back the tail end of the wedge or key piece, and the position of the
jaw can be re-adjusted as may be required.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Charles Neil in the Great Seal Patent Office on the 11th January
1878.
"
CHARLES NEIL, of Sheffield, in the County of York, Tool Maker. IMPROVE-
MENTS IN ADJUSTABLE CRAMP OR CLAMP TOOLS."
My Invention refers to cramp or clamp tools capable of being adjusted with
facility in any desired position, according to distance, and affording when fixed
great security and resisting strength; for this purpose the loose or movable jaw is
free to slide on the bar; the back of this loose adjustable jaw is provided with a
roller, free to turn on a spindle in recess at back of the jaw; there is a wedge or
key piece having by preference a roughened base, with hook or turned-up part at
the small or pointed end to take in a recess or part behind the roller, to prevent its
slipping out while traversing the jaw along the bar.
The accompanying Drawings illustrate the manner of carrying my Invention into
effect.
Figure 1 is a side view; Figure 2 is a longitudinal section; and Figure 3 is an
end view of a joiner's cramp, showing my Invention applied thereto.
Figure 4 shows the Invention as applied to a tool, known as a "bright sash
cramp."
And Figure 5 shows the Invention as applied to a joiner's cramp, supposed to be
of an improved form to that cramp illustrated at Figures 1, 2, and 3.
Figure 6 is a side view; and Figure 7 an end view of another joiner's cramp
showing my Invention applied thereto.
Similar letters refer to like parts in all the Figures.
at is the loose movable and adjustable jaw; b, the bar on which the movable jaw
is free to slide; c is the roller at back of jaw a; and d, recess in which it turns on
spindle e; f is the wedge or key piece; and g, small turned-up end thereof.
To use the cramp, slide the jaw a to the required position, according to distance,
on the bar b, then push in the wedge or key piece funder the wheel c, and the jaw
a is fixed; to release the jaw, raise and pull back the tail end of the wedge or key
piece f, loosening it by a blow or push against the part h in the direction of the
arrow, and the position of the jaw a can be re-adjusted as may be required.
Having now described the nature of my said Invention and in what manner the
same is to be performed, I declare that I claim as my improvements in adjustable
cramp or clamp tools the employment in such tools of a jaw adjustable on the bar
at any desired distance by means of a roller and wedge or key appliance, all con-
structed and acting substantially in the manner herein-before described and
illustrated in the accompanying Drawings.
In witness whereof, I, the said Charles Neil, have hereunto set my hand
and seal, this Third day of January, in the year of our Lord One thousand
eight hundred and seventy-eight.
CHARLES NEIL
(L.S.