Improvements relating to the Manufacture of Self-fastening Frost Cogs.
Year: 1897

page_text: Date of Application, 12th Nov., 1897
Complete Specification Left, 25th July, 1898-Accepted, 27th Aug., 1898
PROVISIONAL SPECIFICATION.
Improvements relating to the Manufacture of Self-fastening Frost
Cogs.
I, SYDNEY CHARLES WOOLDRIDGE, of "The Lawns," Stourbridge, in the County
of Worcester, Manufacturer, do hereby declare the nature of this invention to be
as follows: -
This invention consists of improvements relating to the manufacture of self-
fastening frost-cogs, my object being to produce such cogs im a more expeditious
and economical manner than by the ordinary method of forging from plain bars.
My invention comprises the production of special steel bars, preferably by rolling.
in such a manner that at the required intervals the original cross section or dimen-
sions of the bar shall be reduced to form the shank parts of the cogs, whilst the
broader or original section parts will serve for the formation of the chisel end of the
cogs.
By the application of my invention I am enabled to readily produce a number
of partly formed cogs from steel bar, and thus to obtain a great advantage over the
ordinary method at present employed of forging the cogs from plain steel bars,
my invention effecting an economy in labour and also a saving of material.
I do not limit myself to any one form of my special bar for the manufacture of
self-fastening frost cogs, but employ any suitable section capable of ready produc-
tion by rolling or other processes.
The cutting off and finishing of the cogs from the special bars hereinbefore
described is effected in any convenient manner.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham,
Agents for the Applicant.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham,
Agents for the Applicant.
Improvements relating to the Manufacture of Self-fastening Frost
Cogs.
I, SYDNEY CHARLES WOOLDRIDGE, of "The Lawns," Stourbridge, in the County
of Worcester, Manufacturer, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:
-
This invention consists of improvements relating to the manufacture of self-
fastening frost-cogs, my object being to produce such cogs in a more expeditious
and economical manner than by the ordinary method of forging from plain bars.

page_text: My invention comprises the production of special steel bars, preferably by rolling,
in such a manner that at the required intervals the original cross section or dimen-
sions of the bar shall be reduced to form the shank parts of the cogs, whilst the
broader or original section parts will serve for the formation of the chisel end of the
cogs.
By the application of my invention I am enabled to readily produce a number
of partly formed cogs from steel bar, and thus to obtain a great advantage over the
ordinary method at present employed of forging the cogs from plain steel bars,
my invention effecting an economy in labour and also saving of material.
I do not limit myself to any one form of my special bar for the manufacture of
self-fastening frost cogs, but employ any suitable section capable of ready produc-
tion by rolling or other processes.
The cutting off and finishing of the cogs from the special bars herein before
described is effected in any convenient manner.
In the accompanying sheet of explanatory drawings to be hereinafter referred
to.―
Figure 1 is a side elevation and Figure 2 a plan representing one form of my
special bars for cog manufacture as produced from an ordinary rectangular steel
bar.
Figure 3 is a side elevation and Figure 4 an end elevation of a finished cog.
Figure 5 is a side elevation and Figure 6 a plan representing a modified form
of my special bar, as produced from an ordinary rectangular steel bar.
The same reference letters in the different views indicate the same parts.
Referring to Figures 1 and 2, the bar is rolled or forged throughout its length
to the form illustrated at the right hand side of the length of bar A shown in the
figures, and it is then cut up into short pieces the cutting off position being indi-
cated by the dotted lines at Figure 1, and such lengths are subsequently finished
into cogs, such as shown at Figures 3 and 4, in any ordinary manner.
In the ordinary manufacture of the size of cogs known as 3 inch, or cogs having
the shank part A1 3/8 inch square at the neck, a bar of steel is employed 3/8 inch
by inch. But in the manufacture of 3/8 inch cogs in accordance with my inven-
tion I employ a bar of steel only 5/16 inch by 5 inch, as by rolling or forging the
bar as described, the thickness is increased at the neck part of the shank as shown
at a Figure 2.
In the modified form of my special bar shown at Figures 5 and 6 the cutting
off positions for the cog parts are indicated by the dotted lines at Figure 5.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is;-
-
The manufacture of self-fastening frost cogs from specially formed steel bars,
substantially as described.