Improvements in Belt Fasteners and in the Method and Means of Manufacturing the same.
Year: 1891

page_text: Date of Application, 24th Mar., 1891-Accepted, 25th Apr.. 1891
COMPLETE SPECIFICATION.
Improvements in Belt Fasteners and in the Method and Means of
Manufacturing the same.
I HERBERT JOHN HADDAN of the firm of Herbert & Co. Patent Agents of
18 Buckingham Street Strand W.C. London Civil Engineer do hereby declare
the nature of this invention a communication to me from abroad by Gilbert Patrick
Kenehan of Cleveland, State of Ohio United States of America Machinist
and in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement:-
This invention relates to improvements in belt fasteners and more especially to
an improved process of manufacturing the same and to dies used in carrying out
such process, the object being to produce a strong and durable belt fastener at a
minimum cost.
In the accompanying drawings
Fig. 1 shows a piece of wire rod or stock from which the teeth of the improved
fastener are made.
Fig. 2 shows a blank tooth before the same is attached to the body of the
fastener.
Fig. 3 is a plan view of the plate that constitutes the body of the fastener.
Figs. 4 and 5 are plan views of the opposing faces of the respective dies that are
employed in the improved process of making the belt fastener.
Figs. 6 and 7 are transverse sections respectively on line
x of Figs. 4 and 5,
Fig. 6 showing work in position between the dies ready to be operated upon, a
portion of the work being broken away, Fig. 7 showing the work after the dies
have performed their operation.
Fig. 8 is a perspective view of the finished belt fastener.
A represents the stock or material suitable to be cut into sections of the required
length for making the teeth of the improved belt fastener, and a represents a section
or blank tooth that has been severed from the stock and rolled or cut to a conical
or tapering form approximately one half its length, as shown.
B represents the plate that constitutes the body of the fastener the same being
provided with holes 6 for the reception of the teeth of the belt fastener.
C and D represent a pair of dies that are adapted to fasten the teeth to the
body of the fastener, die D being adapted to rivet the teeth to the body of the
fastener and die C being adapted to chamfer the teeth from a point above the body
of the fastener preferably to the tip of the teeth and to simultaneously upset the
teeth, forming a shoulder on the teeth abutting the body of the fastener both dies
being adapted to perform their functions simultaneously. The construction of the
dies is as follows.
The blocks of metal for the dies of proper size and form, having been provided
the block for die C is provided with the desired number of holes c of the proper
size and shape to chamfer the teeth of the belt fastener, and communicating with
each hole c is provided a recess c¹ for the purpose hereinafter described. Hole c is
preferably made as follows
A hole is first drilled in die C, the depth of such hole being approximately of
the length of the portion of the blank tooth to be operated upon by this die.
This hole is then plugged as shown at E and another hole is drilled at one side
of the first hole that was drilled. The second hole is preferably made to
extend through the die to afford exit from below to any cuttings, dirt or dust that
may find access thereto, the hole being subsequently enlarged, by means of a reamer
approximately to the shape and size of the finished tooth of the belt fastener,
being made tapering or of a conical form and being rounded save at the side formed

page_text: by plug E, the latter at this side being flat or chamfered as shown at e recess c¹
being provided between the end of the plug and face of the die.
Die D is made by taking the block of metal prepared for this die and providing
it with depressions .
Proceeding now with the construction of the belt fastener. Sections a having been
cut from the stock A and rolled or cut as aforesaid, and plate B having been
provided, the latter is placed in position on die C and blank teeth a are inserted in
the respective holes of plate B with their sharp ends extending into the holes of
die C and with their shank ends protruding above the plate to engage depressions a
in the opposing die D. (See Fig. 6).
Power is then applied and the dies made to perform their respective functions
simultaneously. Die C by means of the flat side of the hole e correspondingly
chamfers the tooth of the belt fastener aud upsets into recess c¹ the material that has
been chamfered off the tooth forming a shoulder a¹ on the tooth as shown in Fig. 7
such shoulder abutting the body of the belt fastener, hole e in die C being preferably
sufficiently larger in diameter at this point than the blank tooth that a shoulder a
will be formed all round the tooth as shown. Die D by means of depressions d
rivets the teeth the blank teeth as aforesaid being fastened to the body of the
fastener and finished at one operation.
It will thus be observed that by this improved process when the plate that
constitutes the body of the belt fastener and the blank teeth have been placed in
position between the dies the chamfering and upsetting of the teeth and securing
the latter to the body of the belt fastener are done at one operation and without
any waste of material. Hence a great saving is effected in both labour, time and
material reducing the cost of the belt fastener to a minimum. The arrangement
of holes e in dies C should of course be such that the chamfered side of the teeth
of the belt fastener will come opposite to where the draft of the belt comes.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. The process herein shown and described of manufacturing the teeth of belt
fasteners and consisting first in cutting or rolling the blank tooth approximately
tapering or conical a portion of its length and secondly in chamfering and upsetting
the tooth simultaneously substantially as set forth.
2. The process herein shown and described of manufacturing belt fasteners and
consisting first in cutting or rolling the blank tooth approximately tapering or
conical a portion of its length and secondly in simultaneously chamfering and
upsetting the tooth and fastening the same to the body of the belt fastener substan-
tially as set forth.
3. The process herein shown and described of manufacturing belt fasteners and
consisting first in cutting or rolling the blank tooth approximately tapering or
conical a portion of its length and secondly in simultaneously chamfering and
upsetting the tooth and rivetting the same to the body of the fastener substantially
as set forth.
1. The process herein shown and described of manufacturing belt fasteners and
consisting first in cutting or rolling the blank tooth approximately tapering or
conical a portion of its length, second in simultaneously chamfering and upsetting
the tooth, and thirdly in rivetting the tooth substantially as set forth.
5. A die for simultaneously chamfering and upsetting the teeth of belt fasteners
the die having a hole for each tooth such hole being approximately of the shape
and size of the chamfered portion of the finished tooth and having a recess com-
municating with said hole whereby the material that is chamfered off the tooth is
upset into said recess and a shoulder formed on the tooth substantially as set forth.
6. A pair of dies for simultaneously chamfering, upsetting and fastening the teeth
of belt fasteners one of the dies having holes and recesses communicating with such
holes for chamfering and upsetting the teeth and the other die having as many

page_text: depressions for rivetting the teeth the two dies being adapted to act simultaneously
substantially as set forth.
7. A belt fastener comprising a plate for the body thereof and conical teeth
rivetted to said plate, the teeth being chamfered on the side opposite to where the
draft of the belt would come, and being rounded and smooth on the other side, the
teeth also having a shoulder abutting the face of the body of the fastener substan-
tially as shown and described.
Dated this 24th day of March 1891.
HERBERT & Co.,
18, Buckingham Street, Strand, London, W.C., Agents to Applicant.