An Improved Grip Washer for Belt Fasteners.
Year: 1893

page_text: Date of Application, 17th Jan., 1893
Complete Specification Left, 9th June, 1893-Accepted, 22nd July, 1893
PROVISIONAL SPECIFICATION.
An Improved Grip Washer for Belt Fasteners.
We ROBERT SIMPSON of Albert Road, and BENJAMIN GREAVES SIMPSON
of Stanley Road both of Sheffield in the County of York Gentlemen do hereby
declare the nature of our invention to be as follows: -
Our invention relates to a means of supporting, and preventing the tearing of
leather and other belts at the joints, when the two parts of the belts are joined
together by bolts or screws.
It consists of a thin washer preferably made of steel, with a central bolt hole,
and also having projections formed on both sides capable of being pressed into the
material of which the belt is made; these projections may be of any shape, size,
and number.
The washer is placed between the two pieces of belt that are to be joined, and
when the bolt is screwed up the points will be forced into each strap and prevent
it being torn by the bolt.
Similar washers having points on one side only may be used under the head and
washer or nut of the bolt.
ROBT. F. DRURY, C.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicants.
COMPLETE SPECIFICATION.
An Improved Grip Washer for Belt Fasteners.
We ROBERT SIMPSON of Albert Road, and BENJAMIN GREAVES SIMPSON,
of Stanley Road, both of Sheffield in the County of York, Gentlemen, 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:
Our invention relates to B means of, and appliance for supporting and
strengthening the joints of belting, and preventing the tearing of the leather or
other material, from which the belts are made when such joints are made with
the ordinary band-bolts or similar fasteners.
It consists; when made in the form which we prefer, of a thin metallic washer
having a central bolt-hole, and provided with projections on both sides capable of
being pressed into the material of which the belt is made.
The annexed sheet of drawings will show clearly our invention and its
application.
Fig. 1, is a perspective representation of a circular grip-washer, made after our
invention.
Fig. 2, edge view of same.
Fig. 3, section of joint with inserted grip-washer.
Fig. 4, section and plan of a cast grip-washer.
Fig. 5, plan of a double or joined washer.
The usual method of joining the two ends of a belt whether made of leather or
other material, is to place one upon the other with a suitable amount of overlap,
and fasten them together with short bolts made for the purpose, the number of
bolts used 'varying according to the width of the belt.
The strain due to the transmission of power is carried at the joint principally
PD

page_text: by the bolts passing through the leather, and to a certain extent by the frictional
contact of the leather or other like material due to the grip of the bolts, and when
a belt gives way it is usually by the bolts tearing through the bolt holes to the
edge of the belt, or tears through the material.
Our invention is to give increased strength to the belt at this particular part
by surrounding the bolt hole with a shield incorporated with the belt, which shield
takes the form of a washer.
The shield or grip-washer may be made of tin, sheet steel, or other material
which will carry out the purpose of the invention, and although we prefer for all
ordinary purposes, a round form, we do not bind ourselves to this or any other
configuration.
Figs. 1 and 2 illustrate a shield or grip-washer made from thin sheet metal, it is
circular in shape and is provided with a bolt hole A, and a number of projections B,
in the form of tubular cones which project from both surfaces of the washer, and
are readily made by means of suitable tools; this form of projection is exceedingly
strong to resist lateral strain, and being very rigid are readily pressed by the bolt
into the substance of the belt and obtain a very powerful grip, adding thereby
to the strength of the joint.
In the class of belting known as "chain" or "link" belts, we place one of the said
washers, upon the joint pin between the leather links and compress the projections
into the leather. The washers may also be used in joints made with the usual
copper rivets, the rivets passing through the centre hole of the washer.
The washer is simply placed between the ends of the belt, over the bolt, and the
two parts of the belt forced together over the inserted washer by the action of
the nut, and joints of leather belting so constructed have been submitted to the
testing machine, with the result that they have stood nearly double the strain of
similar joints without the washer. -
The joint when made is represented in Fig. 3, the leather being cut away to
show the washer.
The washer may be cast or made with solid projections as shown in Fig. 4, or
they may be made with indentations or openings, that is from perforated sheet
material, or woven wire-work, in which case the leather or belt material would be
pressed into such openings so as to obtain the desired grip, and although we have
described and prefer that the projections are made on both sides of the washer
they may be made on one side only, and our invention may also be carried out by
serrating the edge of a washer, and turning the points so formed alternately up
and down at right angles with the plane of the washer, or by turning all of them
+up or down.
Fig. 5, shows the construction of a combined or double washer, for broad belts.
Additional washers may be placed under the head of bolt and nut.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same may be performed or carried in practice,
we declare that what we claim is :-
1. As an auxiliary to "band bolts," a metallic washer to be placed over the
bolt between the overlapping ends of the belt, having tubular projections of any
form on one or both sides for the purpose specified, and substantially as herein-
before described with reference to the drawings.
2. A washer provided with solid points or projections upon its surface, or
serrations upon its edge, and used in combination with a bolt as an auxiliary in the
joints of belts, substantially as herein before described.
3. A washer made from perforated sheet metal, or woven wire, or other material
capable of being wholly or partially embedded in the belt, and used in combination
with a band bolt as herein before described.
4. A washer having projections or serrations capable of being embedded in
leather, and used in combination with the joint-pin in chain or link belts for the
purpose hereinbefore specified.

page_text: 5. In the joints of belting, the combination with the usual rivets, of a metallic
washer having projections or serrations which are pressed into the leather, or other
material, for the purpose hereinbefore specified.
Dated the 2nd day of June 1893.
ROBT. F. DRURY, C.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicants.