Year: 1897

page_text: I, WILLIAM BRIGHT, of No. 4, Baron Street, in the City of Sheffield File Grinder,
do hereby declare the nature of this invention to be as follows:-
The object of my Invention is by mechanical means to accomplish the result
known technically as stripping" file blanks, the process being intermediate
between the grinding and the cutting of the teeth in the soft steel blanks for the
better qualities of Files; said stripping being at present done by hand labour
expended upon each file blank singly.
To accomplish the said object, I construct a machine having a framework to
carry the necessary shafts, cranks, slides and other accessories to give a longi-
tudinal adjustable motion to the reciprocating file or scraper holders, the said
holders being provided with elastic blocks, springs or other means to allow of
vertical adjustment and also to regulate the amount of pressure in the application
of the scraper file to the soft blanks.
In addition to the longitudinal reciprocating motion so given to the file, I pro-
vide suitable guides stops levers or grooves whereby a transverse motion in
alternate directions is imparted to the said file at each end of its stroke (or to the
bed upon which the blanks are secured,) for the purpose of clearing said file of
dust and filings produced on the previous stroke, and make said file pass in con-
tact with brushes or wire card covered blocks or rollers; to further assist the
clearing of the file I may introduce means for operating a hammer to give a jar
or blow to the file for loosening and liberating the detritus.
The upper portion of the machine frame is formed into a bed or support for the
file blanks to be operated upon, said blanks being laid upon blocks of elastic
material and secured against movement by any suitable means. Any convenient
number of similar blanks may be operated upon at the same time, suitable spaces
being left between adjacent blanks to permit of the application of the cleaning
apparatus coming into contact with the stripping file or scraper.
Dated this 28th day of January 1897
ISAAC BECK.
Fellow of the Society of Patent Agents
17, Haymarket, Sheffield, Agent for the Applicant.
An improved Machine for
Stripping
"File Blanks.
I, WILLIAM BRIGHT, of No. 4 Baron Street in the City of Sheffield, File Grinder,
35 do hereby declare the nature of this invention and in what manner the same is to
[Price 8d.]

page_text: be performed, to be particularly described and ascertained in and by the following
statement:-
-1
The object of my Invention is by mechanical means to accomplish the result
known technically as "stripping" file blanks. The process being intermediate
between the grinding and the cutting of teeth-in the soft steel blanks of the better
qualities of Files said "stripping" being at present done by hand labour expended
upon each file singly.
To accomplish the said object, I construct a machine having a framework to
carry the necessary shafts cranks slides and other accessories necessary to give a
longitudinal adjustable motion to the reciprocating file or scraper holders these
holders may be provided with elastic blocks springs or other means to allow of
vertical adjustment and also to regulate the amount of pressure in the application
of the scraper file to the soft blanks.
In addition to the longitudinal reciprocating motion so given to the, I provide
suitable guides stops levers or grooves whereby a transverse motion in alternate
directions is imparted to the said file at each end of its stroke or to the bed upon
which the blanks are secured for the purpose of cleaning said file of the dust and
filings produced on the previous stroke by making said file pass in contact with
brushes or wire card covered blocks or rollers: To further assist this clearing of
the file I may introduce means for operating a species of hammer to give a jar or
blow to the file or to its holder for loosening and liberating the detritus.
The upper portion of the machine frame is formed into a bed or support for the
file blanks to be operated upon, said blanks being laid upon blocks of elastic
material and secured against movement by any suitable means. Any convenient
number of similar blanks may be operated upon at the same time, suitable spaces
being left between adjacent blanks to permit of the application of the cleaning
apparatus coming into contact with the stripping file or scraper.
In order that my invention may be fully understood I have annexed hereto a
sheet of drawings illustrating the following description thereof.
Fig. 1. is a side elevation of my machine as arranged for the bed and file blanks
to move transversely.
Fig. 2. is a plan or top view of the same.
Fig. 3. is an end elevation of same on line A. A. Fig. 1.
The chief features of the machine consist of a shaft 1. mounted in suitable bear-
ings driven by pulleys, 2. from any convenient source of power, on each extremety
of shaft, 1. is fitted a disc, 3. (shown in Figure 1 with its upper portion broken
away for want of space) in each of the slots, 4, is fixed an adjustable crank pin, 5,
upon which is fitted a rod 6, connecting and conveying motion to corresponding
pins, 7, fitted to and projecting through blocks, 8, sliding between guide bars, 9;
the pins, 7, may be connected to each other by the block or frame, 10, to which is
attached the stripping file, 11, or the said pins and block may be made all out of.
one piece if desired. The stripping file, 11, is shown in drawing as attached to
block by countersink bolts, 12, and as adjusted by set screws, 13, but it will be
quite evident it can and may be secured in a variety of ways, and also that an
elastic cushion may be introduced between the file, 11, and its carrier block, 10,
without further description being necessary. Upon the two standards which carry the
slide bars, 9, are fixed or formed transverse slides, 14, for the reception and support
of the work bed, 15, which I prefer to be in the form of a tray or box inside this
tray at distances apart corresponding to the length of file blanks to be operated
upon I place in notches, 16, a pair of bearers, 17, each of which has inserted therein
and projecting above its surface a block, 18, of india-rubber or other equivalent
elastic substance upon which the file blanks, 19, are placed so as to leave alternate
spaces, 20, between. These spaces are fitted with brushes or wire card blocks or
rollers for the purpose of cleaning the stripper file as it passes to and fro over them.
To the side of the framing is fitted a flat bar, 21, upon which are placed a pair
of adjustable dogs, 22, the said bar, 21, has also pins or studs attached thereto for

page_text: transmitting motion to a pair of bellcrank levers, 23, swivelling upon studs, 24,
fitted into cross bar, 25, one end of each lever, 23, is also connected to the underside
of the tray, 15, the result being a transverse motion is given to the tray whenever
the piece 26, projecting from the carrier block, 10, comes into contact with either
of the adjustable dogs, 22.
The operation of the machine may be summarised as follows:-The stroke of
the stripper file is adjusted by means of the crank pins, 5, to suit the length of
file blanks, the two bearers 17, being likewise placed in proper notches, 16, the
blanks, 19, are laid upon the elastic bed, 18, the stripper file, 11 and the bearers 17
are adjusted vertically to obtain the requisite pressure and cutting action on the
passage of the file over the blanks, the machine being set in motion so soon as the
file has passed over the blanks the projecting piece, 26, coming into contact with
one of the dogs, 22, pushes the bar 21 along and through the bellcranks 23, the
tray, 15, is carried across about the breadth of a blank, so that the portions of the
stripping file working upon the blanks in one direction are alternately exposed to
the action of the brushes fixed in the spaces, 20. The working of the machine is
thus carried on automatically until the blanks have been brought to the required
stage of perfection.
When a jar or blow is desired to assist in clearing the stripper file I attach or
hinge a sort of hammer to one or both ends of the machine in such position that
as the file reaches the end of its stroke it releases the hammer which by its fall
causes a corresponding jar or blow.
Having now particularly described and ascertained the nature of my said
Invention, and the manner the same is to be performed, I declare that what I
claim is:-
The general arrangement combination of parts with the resultant movements
constituting a machine for performing the work technically known as file
"stripping" substantially as herein described.
ed this 20th day of October 1897.
ISAAC BECK, F.S.P.A.,
Haymarket Chambers, 17 Haymarket, Sheffield.
Agent for the Applicant.