IMPROVEMENTS IN RATCHET BRACES
Year: 1882

page_text: LETTERS PATENT to Timothy Webster Cheesebrough of 4 South Street,
Finsbury, in the county of Middlesex, Gentleman for an invention of
"IMPROVEMENTS IN RATCHET BRACES
"
PROVISIONAL SPECIFICATION left by the said Timothy Webster
Cheesebrough at the Office of the Commissioners of Patents on the 14th June
1882.
TIMOTHY WEBSTER CHEESEBROUGH of 4 South Street, Finsbury, in the county
of Middlesex, Gentleman IMPROVEMENTS IN RATCHET BRACES "
"
This invention relates to improvements in that class of ratchet braces in which
the action of the brace is continuous when worked vertically and intermittent
when worked horizontally or at an angle, the object of the present improvements
being to render the brace stronger and more durable than those hitherto
constructed.
In carrying out my invention I employ a ball ratchet the teeth whereof are cut
or formed obliquely or skew wise on the ball, the ratchet being propelled by not
less than two pawls which may be placed in the usual handle.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Timothy Webster Cheesebrough in the Great Seal Patent Office
on the 14th December 1882.
TIMOTHY WEBSTER CHEESEBROUGH of 4 South Street, Finsbury in the county
of Middlesex, Gentleman "IMPROVEMENTS IN RATCHET BRACES"
This invention relates to improvements in that class of ratchet braces in which
the action of the brace is continuous when worked vertically and intermittent
when worked horizontally or at an angle, the object of the present improvements
being to render the brace stronger and more durable than those hitherto
constructed.
In carrying out my invention I employ a ball ratchet the teeth whereof are cut
or formed obliquely or skew wise on the ball, the ratchet being propelled by not
less than two pawls which may be placed on the usual handle
A spiral or other suitable spring is placed behind each pawl so as to enable them
to yield to the corresponding teeth of the ratchet.
In order to enable my invention to be better understood I will proceed to
describe the same by reference to the accompanying drawing in which figure 1 is a
side elevation partly in section of a ratchet brace constructed according to my
invention; figure 2, plan of the same; figure 3 an end elevation partly in section
and figures 4 and 5 perspective views shewing the handle of the brace in different
positions; figure 6 detached sectional view shewing the socket. Similar letters in
all the figures represent similar parts.
a, is the ball ratchet the teeth of which are cut or formed obliquely or skew wise
thereon; the socket of the handle in which the ball ratchet a, works is of elliptical
shape in plan with concave inner sides the lower half b, of the socket being formed
in the handle itself, the upper half consisting of a separate ring c; the ratchet is
cast or formed in one piece with the stock d, and is dropped into the lower half b,
of the socket and the ring c, is then placed in position and fixed by screws e, so
that the handle can then be moved over the ball ratchet a, in any direction; f, and g,
are the two pawla placed in the usual handle h; i, i, spiral springs for keeping the
pawls in the teeth of the ratchet a, and allowing them to yield to the teeth when
the handle is operated; j, is the usual drill
By this arrangement it will be understood that if the bandle h, of the brace be
operated vertically as shewn in figure 5, the action of the brace will be continuous
the pawl f, operating the ball ratchet a, when the handle h, is moved upward and
the pawl g, operating the ball ratchet a, when the handle h, is moved downward.
This construction of ratchet will also allow the brace to be worked intermittently
when the handle is operated horizontally or at an angle as shewn in figures 1 and 4
as the concave shape of the socket of the handle will allow of the same being
moved over the ball ratchet a, at any angle, the pawls f, and g, always keeping in
the teeth of the ratchet.
Having thus described my said invention and the best means I am acquainted
with for carrying the same into effect I wish it to be understood that What I
claim is :-
Firstly. The improved ratchet brace constructed arranged and operating as
herein before described and represented in the accompanying drawing.
Secondly. In ratchet braces, a ball ratchet the teeth whereof are cut or formed

page_text: obliquely or skew wise thereon, in combination with not less than two pawls as
and for the purposes hereinbefore described and represented in the accompanying
drawing.
In Witness whereof I the said Timothy Webster Cheesebrough have hereto
set my hand and seal this thirteenth day of December in the year of our
Lord one thousand eight hundred and eighty two.
T. W. CHEESEBROUGH. (L.S.)