Method of Preparing Raw Hide Blanks for Toothed Gear Wheels, Belts, or other Purposes.
Year: 1889

page_text: · Date of Application, 5th Dec., 1889-Accepted, 11th Jan., 1890
COMPLETE SPECIFICATION.
Method of Preparing Raw Hide Blanks for Toothed Gear Wheels,
Belts, or other Purposes.
A communication from abroad by FREDERICK LATULIP and GEORGE BEMENT
LEONARD, both of Syracuse, N.Y., County of Onondaga, United States of
America, Mechanic and Banker, respectively.
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of the Agency for Foreign
Patent Solicitors, 6, Lord Street, Liverpool, and, 6, Bank Street, Manchester, both in
the County of Lancaster, and 323, High Holborn, in the County of Middlesex, Civil
Engineer, 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 invention relates to a novel method of preparing raw-hide blanks for toothed
gear wheels, belts or any other purposes, and it consists in submitting layers of
raw-hide to the treatment more fully described hereinafter and pointed out in the
claims.
In the accompanying drawings:-
Figure 1 represents several pieces of the hide after it has been prepared for
cementing.
Figure 2 a detail sectional view showing the manner in which the ligaments are
interlocked by compression, and
Figure 3 a view of a finished blank.
In carrying out the method, the sides of two or more sheets a of raw-hide which
have been previously stretched or dried, are first harrowed up with a sharp instrument,
to roughen and form the ligaments and interstices c.
After the sides of each piece have thus been prepared, a weak solution of acid such
as sulphuric or its equivalent, is applied to the roughened surfaces of the hide to make
the pieces cohere with greater tenacity.
The hide is then allowed to dry thoroughly after which it is submitted to a coat
of "sizing" such as glue or cement or any suitable adhesive material.
This sizing is allowed to harden so that the projecting ligaments will become stiff
and bony.
After thus drying, the layers of hide are given another coating of cement, glue
or suitable adhesive material, and then placed one upon the other and submitted to
heavy pressure until the whole block becomes hard and dry.
When the layers of raw-hide are thus compressed together, the small projecting
ligaments of hide which have been raised from the surface by harrowing, will project
one past the other, and in the compressing operation, will become tightly inter-
locked or bound together, and the surface of the hide of one layer will be driven
into the interstices of the contiguous layer, as more clearly shown in Figure 2 of the
drawings.
The laminæ are so thoroughly cemented or held together that it is almost impossible
to separate them, and they form a solid and almost integral mass possessing
remarkable strength and durability.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, as communicated to me
by my foreign correspondents, I declare that what I claim is :-
1. The method of preparing raw-hide blanks, consisting in first harrowing the
surfaces of several pieces of hide to form projecting ligaments thereon and interstices
therein, secondly, giving said surfaces a solution of acid, thirdly, covering them

page_text: with glue or cement, fourthly, placing them one upon the other, and fifthly, sub-
mitting them to pressure until dry, in the manner and for the purpose substantially
as described.
2. The method of preparing raw-hide blanks, consisting in first, harrowing the
surfaces of several pieces of hide to form ligaments thereon, secondly, giving the
surfaces a solution of acid, thirdly, drying the pieces, fourthly, coating them with
a sizing of glue or cement which is allowed to dry, fifthly, adding another coat of
cement or glue, sixthly, placing the pieces one upon the other, and seventhly
submitting them to pressure until dry in the manner and for the purpose set
forth.
3. The method of cementing raw-hide which consists in, first, roughening the
surfaces, secondly, giving them a preparation of acid, thirdly, applying cement or
glue, and fourthly, compressing the whole together, in the manner and for the purpose
described.
D
41 1
en
1
1000
WM. P. THOMPSON & Co.,
Agents for the Applicant.