Improvements in the Construction of Machines for Cutting Files and other like Serrated Articles Automatically.
Year: 1893

page_text: Date of Application, 28th Mar., 1893
Complete Specification Left, 27th Dec., 1893-Accepted, 27th Jan., 1894
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Machines for Cutting Files and
other like Serrated Articles Automatically.
I, ARTHUR FRANK DENISON 50, Malvern Road, Beeston Hill Leeds, in the
County of York Mechanical Engineer do hereby declare the nature of this
invention to be as follows:-
:-
I also
My invention relates to an improvement in simplifying the construction of
machines for cutting files and other like serrated articles. The machine consists of
a suitably constructed standard which carries the driving shaft with a suitable cam
with one or more lifts fitted on the end of the shaft for the purpose of raising the
slide or header holding the chisel the said shaft running parallel and directly over
the bed holding the file to be cut, the said slide or header being fitted into the said
standard in such a position as the cam which is placed on the horizontal shaft will
raise the slide or header at such an angle as may be required for cutting the teeth
on the file or other serrated articles, the blow being caused by a suitable spring
being placed above and resting directly on the said slide or header the spring being
retained in a recess in the top part of the standard, pressure being brought on the
spring by means of a screw or other suitable means for regulating the blow.
place a tooth wheel on driving shaft to give motion to a disc which is connected by
means of a rod to a ratchet plate which is fitted on a socket with a long screw
passing through the said socket and a ratchet wheel fitted on the end of the long
I make a suitable
screw to give motion to a bed or slide on which the file is held.
foundation bed plate for the reception of the sliding bed on which the file rests
and to carry the standard of machine which spans the said moving bed and fitted
to the foundation bed plate. I also place a brake attached to the foundation plate
and passes round the long screw for the purpose of steadying the movement of the
sliding bed. I fit a suitable shaft to the standard for the purpose of holding a
movable presser in position for levelling the file while being cut. I attach suitable
mechanism to the sliding bed to stop the blow at any moment without stopping the
machine and which also stops the travelling bed automatically where and when
required. A suitable nut is fitted to the sliding bed and fits into the long screw
for giving motion to the said sliding bed. I make a tilting case to fit in the said
sliding bed on which the file rests and is brought level by the movable presser.
Dated this 27th day of March 1893.
COMPLETE SPECIFICATION.
Improvements in the Construction of Machines for Cutting Files and
other like Serrated Articles Automatically.
1, ARTHUR FRANK DENISON, of 50, Malvern Road Beeston Hill, Leeds, in
the County of York, Mechanical 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:-
This invention relates to an improvement, in machines for cutting files and
other like serrated articles, whereby their construction is simplified, the adjustment
of the work to the chisel controlled, the angle of the chisel regulated as required,

page_text: Teciprocation of the neader
of the machine.
arrested without stopping the driving shaft
In machines constructed according to this invention the driving shaft is
arranged over and parallel, longitudinally, with the centre of the travelling bed in
which the tilting work support or bed rests. The "header," that is, the sliding
portion of the machine in which the chisel is fixed, so as to be capable of
adjustment, is arranged to work in slides at an angle, suitable to cut and throw up
the tooth of the file and, to the cam mounted on the end of the driving shaft from
which it (the "header") receives an intermittent reciprocating motion. Provision
is made for automatically arresting the traverse of the bed, and the reciprocation
of the "header may be stopped without stopping the traverse of the travelling
bed by disconnecting a pair of hooked cam levers by means of an adjustable cam
fixed to the side of the said travelling bed. The machine may be driven either by
hand or power.
In the drawings hereunto annexed :-
Fig. 1. is a side elevation, Fig. 2. an end elevation, and Fig. 3. a plan looking at
the top of a machine constructed according to this invention.
Figs. 4, 5, and 6 are respectively a longitudinal section, a transverse section, and
a plan looking at the top of the tilting bed.
Fig. 7. is a sectional elevation of the "header."
Like parts in all the views are marked with the same letters of reference.
A is the framework of the machine. B the travelling bed which slides upon the
foundation A of the machine. The travelling bed B receives an intermittent
reciprocating motion from a screw shaft C,-mounted in bearings a a¹ on the
foundation portion A, which passes through the travelling bed for engaging with
the half nut C carried in slides at the bed B so as to be capable of being raised
and lowered to its work by lever Cx jointed to the bed. The screw shaft C is
actuated by a pawl C, ratchet wheel C2, connecting rod C4 adjustable in slot e' of
plate C³ pivoted to the framework, disc C mounted upon a short shaft carried in
the bracket a² of the standard A², spur gearing D, driving shaft E, and driving
pulley F. The pawl C¹ may be mounted in the slot c of plate C3 so as to be
adjustable. On the screw C may also be mounted a brake for preventing any
"back-lash" taking place. The brake consists of a divided wood or other
suitable block G which is made to grasp the screw shaft C. Over the periphery of
this block is passed a U shaped clip g, the outer ends of which are held together,
as well as attached to the framework of the machine by a serew gl and thumb
nut g' whereby the tension on the brake-block G may be increased or diminished at
pleasure.
In the travelling bed B is provided a recess in which is inserted the tilting bed H,
which is preferably shaped as shown at Fig. 5 (transverse section), that is, on the
underside of the bed is provided a small semi-circular projection / arranged to run
longitudinally under the centre of the bed to form a pivot upon which the bed may
oscillate for readily adjusting the work to the angle of the chisel. In the tilting
bed H is also a recess for the reception of the lead or other work supporting
piece. The tilting bed H, or when a tilting bed is not employed the travelling
bed B, is provided with a tang holding device H'.
A is the bifurcated standard which is fixed to the framework of the machine, and
provided with a bearing A* in which is mounted the driving shaft E immediately
over and parallel (longitudinally) with the centre of the bed B. The front end of
the standard A' is provided with a slide I over which is a spring chamber !'.
The slide I is fixed at an angle, suitable to cut and throw up the tooth of the
file, to the centre of the horizontal driving shaft E as shown at Fig. 1. The
"header" J, that is, the sliding portion of the machine in which the chisel is
fixed, is mounted in the slide I in such a manner that the cam L,-with one or
more lifts," -on the front end of the driving shaft E, will pass into the recess J'
at the back of the "header" for acting upon the steel projecting piece J2 which is
let into the "header" as shown. By this means I am enabled to work the "header"
66

page_text: in angular slides from a cam, such as L, fixed at a right angle to a central horizontal
driving shaft.
The chisel K is fixed in the holder M and its height may be regulated by the
vertical screw m whilst it is securely fixed in position by the horizontal screws m¹ m².
The chisel's angle of inclination for varying the slope of the tooth or cut of the file
may be altered by means of the. adjusting screw m² which is screwed into the
"header" at a suitable distance below the top and back of the chisel.
The "header" is raised by the cam L, and the blow for cutting the tooth of the
file, whilst the travelling bed B is stationary, is imparted by means of the spring N
arranged within the chamber I so as to act upon the top of the "header." The
tension of the spring N may be regulated by the screw and handwheel O. The
weight of the "header" is carried by the adjustable spring O'
To arrest the motion of the "header" without stopping the traverse of the
bed B to the standard A2 is pivoted a hooked and handled lever P. The lever P
is pivoted to the standard at p and is provided with a second catch pl for passing
under a pin J3 which is screwed into the "header" J and works in the slot a³ of
the slide portion of the standard A². When the catch p' is passed under the
pin J3, which will then be at the top of slot as, the steel projecting piece ♫* will
be raised above the gyratory path of the cam L thereby permitting the driving
shaft E, and cam L to revolve and the bed to travel without operating the chisel.
The catch p' of lever P is kept under the pin Js by means of the spring p². But
when it is required to bring the "header" into action the lever P, is drawn over
in the direction of arrow 1, by the handle p³ until the catch is clear of pin J³, as
shown at Fig. 1, and it is held in this position by the hook Q' of the handled
lever Q (which is pivoted to the standard at q) engaging with the hook pt of
lever P. The spring p² is employed for keeping the two levers P and Q in contact.
The handle Q2 at the lower end of the lever is provided with a pin Q3 which
is made to pass through and project beyond the inner side of the said lever for
engaging with an adjustable cam or tappet piece R attached to the side of the
travelling bed B. As the bed B travels in the direction of arrow 3 the pin Q³ is
made to travel up the incliner of the cam R, and when it has reached the flat
raised portion the file will have been cut, the handle end Q2 of lever Q forced
in direction of arrow 2 for disengaging the hooks Q' and p' whereby the inter-
mittent reciprocation of the "header" is stopped by the catch p' of lever P
passing under pin J³.
"
To level the file and adjust it to the angle of the chisel I provide a presser S,
which slides on the surface of the file blank, and is pivotably attached to a
carrier S¹ fixed to a shaft S2 so that the lower edge of the presser and the axis of
the shaft may be in a line with each other. The shaft S² is mounted, over the
centre of the bed B but at an angle (longitudinally) thereto, in a block S³ secured
to a shaft S carried in bearings in the standard A2 across the machine, and at
or about a right angle to the shaft S. The shaft S' is free to turn in its
bearing Sand it is armed at its upper end with a short lever S', the lower
end S of which forms a nut for a screw S' carried in the end of a lever S³ fixed
to the end of shaft S. As the lever S' is turned to the right or to the left hand
by the screw S' the shaft S' will he turned in its bearing S³ for moving the
presser S which causes the tilting bed H and its work to be carried or turned in
the same direction as the presser. The presser is kept to its work by the
weights T fixed to the free or handle end t of the lever S which is mounted at c'
on the end of shaft St.
The presser S and chisel K may be turned in their holders or carriers to any
angle across the bed H.
U is the flywheel of the machine mounted on the driving shaft E.
The screwed portion of the shaft C does not extend to the front end of the
machine but a space C** is left rather longer than the length of the half nut C³
whereby the bed may automatically stop its traverse whenever the nut C³ becomes
disengaged with the screw portion of the shaft C.

page_text: The machine may be driven by either hand or power, and when driven by
power suitable belt shipping mechanism may be provided.
The herein described machine is applicable for cutting any shape of file, such
as for instance; "three square" (triangular) saw files and edges of files generally,
also round, flat, square, and cotter files.
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 :-
:―
1. The improvements in the construction of machines for cutting files and other
like serrated articles, in which the chisel is capable of being set at an angle and
mounted in an intermittent reciprocating "header" carried in slides at an angle
to the plane of the travelling bed and driving shaft of the machine, and provided
with means for arresting the motion of the "header" without stopping the
travelling bed or machine, and a presser for adjusting the work to the angle of
the chisel, substantially as herein set forth and illustrated.
2. In a machine, for cutting files and other like serrated articles, substantially
such as herein set forth and illustrated, the combination of a travelling bed with
a tilting bed on which the work is held by a tang holding device, said tilting bed
being armed on its underside with a longitudinal and semi-circular projection on
which the bed oscillation as set forth.
3. In a machine, for cutting files and other like serrated articles, the arrange-
ment and combination of the horizontal driving shaft mounted in bearings over
and parallel with the centre of the travelling bed, the "header" working in
slides fixed at an angle as described to the horizontal driving shaft and plane
of the travelling bed capable of receiving an intermittent reciprocating motion
from a cam mounted on the end of the said horizontal driving shaft, substantially
as herein set forth and illustrated.
4. In a machine, for cutting files and other like serrated articles, substantially
such as herein described and illustrated, the combination of the "header "J
arranged at an angle to the driving shaft E and cam L as described, chisel K
and means for adjusting it to the required angle of tooth, the levers P and Q,
pin J and cam R with the travelling bed B and its supporting framework as and
for the purposes set forth.
5. The combination, in a machine for cutting files and other like serrated
articles, of the tilting bed H, travelling bed B and its supporting framework and
actuating mechanism, presser S, and the mechanism substantially as described for
adjusting and holding the file, as set forth.
6. The general arrangement and combination of the various parts forming the
improvements in machines for cutting files and other like serrated articles
substantially as herein set forth and illustrated in the accompanying drawings.
Dated the Twenty-sixth day of December 1893.
ARTHUR FRANK DENISON,
By W. Fairburn-Hart,
Agent.