IMPROVEMENTS IN PADS FOR. RUPTURE TRUSSES
Year: 1871

page_text: LETTERS PATENT to William Robert Lake, of the Firm of Haseltine,
-
Lake, & Co., Patent Agents, Southampton Buildings, London, for
the Invention of “IMPROVEMENTS IN PADS FOR. RUPTURE TRUSSES.”—A.
communication from abroad by Thomas. Atkinson M°Farland, of
Erie, Pennsylvania, United States of America.
Sealed the 14th August 1871, and dated the 8th June 1871.
COMPLETE SPECIFICATION filed by the said William Robert Lake
at the Office of the Commissioners of Patents, with his Petition and.
Declaration, on the 8th June 1871, pursuant to the 9th Section
of the Patent Law Amendment. Act, 1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
ROBERT LAKE, of the Firm of Haseltine, Lake, & Co., Patent Agents,
Southampton Buildings, London, send greeting.
WHEREAS I am in possession of an Invention for "IMPROVEMENTS. IN
PADS FOR RUPTURE. TRUSSES," and have petitioned Her Majesty to grant
unto me, my executors, administrators, and assigns, Her Royal Letters.
Patent for the same, and have made solemn Declaration that it has,

page_text: '
Figure 1 shews a truss with my improved pad attached thereto;
Figure 2 is a transverse section of the said pad drawn to an enlarged 1
scale shewing the manner in which it is constructed.
2
In Figure 1A is the ordinary spinal pad; B is the spring; and C, the
pad provided with my improvements as clearly shown in Figure 2.
This pad. C is composed of the following parts:-I is the body piece,
which may be made of wood, metal, or any other suitable material. 2
In this piece is cut the cavity or mortice G wherein is placed the spiral
spring H. Fitting or pressing on this spring is the bolt E with its
sperical, hemispherical, or double convex head F; this is held in place
by the metallic plate D which is screwed to the body I by the screws J.
The upper part of the bolt E has a screw cut thereon for the purpose
of attaching the same to the spring B. The coil spring H is taper, and
as it is pressed together the parts fit within each other, forming a flat
coil, thus preventing kinking and giving ample room. The head F is
spherical in form, and as the shank of the bolt has play room in the
plate D it acts as a ball-and-socket joint allowing the pad to vibrate in
every direction. Thus it will be seen that while the pad is pressing
against the ruptured or protruding part the vibrations of the truss
caused by the movements of the body are lost in the action of the ball-
and-socket joint above described, and the pad does not move at all.
Instead of the head F resting directly on the spring, as shewn in a
Figure 2, a loose plate may be placed on the spring and the head placed
on that, so as to act between the said loose plate and the plate D.

page_text: Having thus described the said Invention as communicated to me
by my foreign correspondent, I claim,―
First. The bolt E with its spherically formed head F in combination
with the spiral spring H operating as described and for the purposes
set forth.
Second. The bolt E with its head F constructed as described, and the
spiral spring H in combination with the body I and plate D when
constructed and operating as described for the purposes set forth.
In witness whereof, I, the said William Robert Lake, have here-
unto set my hand and seal, this Eighth day of June, in the year
of our Lord One thousand eight hundred and seventy-one.
Witness,
E. W. TYNDALL.
WILLIAM ROBERT LAKE. (L.S.)