Year: 1887

page_text: Date of Application, 8th Feb., 1887.
Specification Accepted, 18th Mar., 1887.
I ALFRED GEORGE BROOKES of the firm of William Brookes & Son, of 55 and
56 Chancery Lane in the County of Middlesex, Fellow of the Institute of Patent
Agents 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:
My Invention relates to improvements in file cutting machines of that class wherein
the cutting tool is secured to a reciprocating tool carrier, and consists primarily in
the provision, in a machine of the class named of means whereby the toll may be
caused to deliver either light, or heavy blows as desired, and whereby the character of
such blows may be changed from light to heavy, or vice versa while the machine is in
operation.
The Invention further consists in means for holding the file blank in position to be
operated upon by the cutting tool, and in means to prevent the jumping, or displace-
ment of the blank receiving bed when the machine is in operation and finally the
invention consists in the construction, arrangement and combination of the several
parts for service, substantially as hereinafter specifically described.
IN THE DRAWINGS
Figure 1, represents in side elevation a file cutting machine embodying my

page_text: which it is secured to a suitable foundation. I provide the upper surface of the base
with a groove, or way a², to receive a moveable bed B, upon which the file blank b,
is secured by a clamp ¹, or other suitable means, C, is a standard which projects
upward from the base, and is provided, near its top upon one side thereof with a
projecting hollow stud c, upon which is mounted a swinging or oscillating head D,
the outer surface of which at equal distances from the middle thereof-is provided
with guides d, d, having each its inner edge bevelled to form a dovetailed way d², by,
and in which a tool carrier E, is held and operates. The side edges of the tool
carrier E, are bevelled to correspond with the guides d, d¹, as will be understood.
If desired the body of the carrier may be rectangular in cross section, and be held
between the guides d, d, by a plate which is secured to the outer faces of said guides
as indicated by dotted lines Figure 2, D₁, designates an arm which is formed
integral with, and projects upwardly from the head B, and which, at its top, is turned
to one side and provided with an enlargement D³, having a screw threaded aperture d
formed therethrough, in alignment with the dovetailed way d², of the head D, to
receive a screw threaded tube F, through which extends a rod E¹, from the carrier E
as shown.
F designates a band wheel which is secured to the upper end of the screw tube F,
to turn said tube and move it up or down in its bearings D³, for a purpose presently
to be explained.
The tool carrier E, is reciprocated by a rotating cam G, secured, within a recess
formed in the head D, upon a shaft G¹, that extends through the hollow stud c, and is
provided upon its outer end with a pulley G, to receive the driving bolt, G³, and a
balance or Hy wheel G₁.
E', designates a stud which projects from the carrier E, and operates in conjunction
with the cam G, to operate the carrier.
From the foregoing description it will be observed that the rotation of the cam G,
operates to reciprocate the carrier E, in its guide way d², said carrier being operated
in one direction, upward, by the positive action of the cam G, upon the stud E³, and
in the opposite direction, downward, or toward the file blank, by gravity, whereby
successive blows, delivered by a cutter held by said carrier upon a file blank will be
of equal force, and would, if all blanks had the same degree of hardness, fully meet,
and serve the end sought, i.e., the production of a file having its cuts regular in depth
and size.
As, however, no two file blanks have the same degree of hardness, and as in some
instances a single blank is harder at one end than at the other, it is necessary to
provide the machine, whereby said blanks are cut, with means for regulating the force
of the blows delivered by the cutter, and further that such adjustment be made while
the machine is in operation. To this end I provide the following mechanism, viz. H
and H designate springs in the present instance shown as formed of rubber which are
placed upon the rod E, the one H, between the carrier E, and a washer h, placed
upon said rod E', and bearing against the lower end of the screw threaded rod F, the
other H, upon said rod E¹, between the upper surface of the hand wheel F, and a
washer, placed upon the screw threaded upper end of the rod E¹, and held in
position by jam nuts h².
It will be apparent that, as the carrier is by its stud E², and operating cam G,
forced to move within certain predetermined limits, the force of the blows delivered
by the cutter held by said carrier will be determined by the extent to which either of
the springs H or H₁, is compressed, by the upward or downward movement of the
tube F, and also that either of said springs may be compressed, while the machine is
in operation, the lower spring to impart an increased force to the blow, the upper
spring to reduce the force of such blow, and to impart to the cutter an action closely
approaching that imparted by the human hand, viz, an elastic resistance to the force
of the blow.
It will be observed that the axis of oscillation of the carrier E, coincides with the
axis of the carrier actuating cam G, and that consequently said carrier, and its con-
tained cutter will operate at any desired angle as regards the file blank, the head D

page_text: being held at the desired adjustment by any required means, as for instance by a set
screw 6, which projects from said head D, through a curved slot 7, in the standard C.
The bed B, may be moved back and forth upon the base A, by any suitable
mechanism, as for instance by a half nut 1, hinged to the bed and engaging the teeth
of a screw threaded rod 1, placed within a groove i formed in the base A, parallel
with said bed B. The screw threaded rod I, is provided at one end with a worm
geared pinion 12, which is engaged and rotated by a worm screw K, mounted upon a
Shaft K, journaled transversely of the base A, in bearings, projecting therefrom,
and rotated through a pulley K², from the belt G³.
I designates a tension or belt tightening pulley which is mounted upon the end of
a lever I, pivoted to the standard C, to impart tension to the belt G³.
The file blank b, may be held steady upon the bed B, by any desired means, as for
instance by the following described mechanism, viz.: M, designates a pressure foot, the
downward curved end of which bears upon the file blank in advance of the cutter X,
and is provided with a shank m, which is held within the perforate head n, of a rod N,
held and adjusted within a bore n', formed lengthwise through the guide d', or
through a lateral projection therefrom. The degree of pressure exerted by the foot M,
is determined by a lever 0, which is hinged at one end to the standard C, and
provided with a slot o, to receive a pin which projects from the rod N, as shown by
dotted lines; 0', designates a weight pendant from the outer end of the lever O, to
impart force thereto; G, designates a foot lever which is fulcrumed to a support. G¹,
and extends below the weight 01, to raise said weight, and thereby relieve the
blank b, from the pressure of the foot M.
The cutter X, may be held in position in the carrier E, by any desired means as for
instance by a set screw s.
Y, designates a belt shipper of the ordinary description.
The operation of my improvement is obvious and requires no further description it
being understood that one or the other of the springs H or H', is placed under com-
pression by the action of the rod F, to impart a greater, or less degree of force to the
blows delivered by the cutter X. The springs H and H, may be of any suitable
material, and form, as for instance of rubber as herein shown or coiled or leaf springs
of metal, also said springs may be placed under compression by means other than that
herein described, without departing from the spirit and intent of my invention which
contemplates a machine wherein the force of the blows delivered by the cutter may be
regulated and determined by the operator without necessitating the stoppage of the
machine for that purpose and whereby there is an elastic resistance opposed to the
force of the blow of the cutter.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed I declare that without limiting
myself to the exact construction herein described what I claim is :-
1. In a file cutting machine the combination of the tool carrier with an elastic
buffer, substantially as described.
2. In a file cutting machine, a tool carrier provided with means substantially as
described to impart different degrees of elastic resistance to the blows of a cutter
secured to said carrier, as and for the purpose set forth.
3. In a file cutting machine, a reciprocating tool carrier, guides therefor and means
substantially as described to move said carrier in opposite directions with different
degrees of force, as and for the purpose described.
4. In a file cutting machine, a tool carrier, guides therefor, and mechanism to
positively lift said carrier, in combination with means substantially as described to
increase or decrease the degree of force of the movement of said carrier in both
directions, as herein set forth.
5. An oscillating head, guides secured thereto, a tool carrier held by said guides,
and mechanism to reciprocate said carrier in combination with means substantially as
described to impart increased or decreased force to both movements of said carrier, as
and for the purpose set forth.

page_text: 6. A base, a moveable bed thercon to receive a file blank, an oscillating head
supported from said base, and provided with guides, a tool carrier held by said guides,
mechanism to reciprocate said carrier, and means substantially as described to impart
an increased or decreased resistance to both movements of said carrier as for the
purpose described.
7. In a file cutting machine, a base, having an upwardly projecting standard, and a
moveable file blank receiving bed, an oscillating head pivoted to said standard, and
provided with guides to receive a tool carrier, mechanism to reciprocate said carrier,
and means substantially as described to secure said head in desired position, and means
to impart an increased, or decreased resistance to the movement of said carrier, as and
for the purpose described.
8. A base, a standard projecting therefrom, an oscillating head pivoted to said
standard and provided with guides to receive a tool carrier, a reciprocating tool carrier,
a rotating cam to positively move said carrier in upward direction, and springs to
impart an increased or decreased resistance and force to the movements of said carrier,
as and for the purpose described.
9. A base, a standard projecting therefrom, an oscillating head pivoted to said
standard, guides on said head, a reciprocating tool carrier held by said guides and
provided with a projecting rod, springs placed upon said rod to impart an increased
or decreased resistance to the movement of said carrier in both directions, and means
substantially as described to regulate the tension of said springs, as and for the
purpose described.
10. A base, a standard projecting therefrom, an oscillating head pivoted to said
standard and provided with an upwardly projecting arm, and guides to hold a tool
carrier, a reciprocating tool carrier, a hollow adjusting screw mounted in the upwardly
projecting arm of said oscillating head in alignment with the carrier, a rod projecting
from said tool carrier through said adjusting screw, and springs placed on said rod,
at opposite ends of said adjusting serew to impart force and resistance to the move-
ment of said tool carrier, as and for the purpose described.
11. The combination of the adjusting screw F, and its operating wheel F, with the
oscillating head D, its arm D', and guides d, d², carrier E, its rod E¹, and controlling
springs Hand H', substantially as described.
12. The combination of the base A, having standard C, oscillating head D, having
arm D, and guides d, d', reciprocating tool carrier E, having cutter X, and mechanism
substantially as described, to operate and control the movement of said carrier with
the reciprocating bed B, its feed screw 1', and shaft K', and mechanism substantially
as described to receive, and hold the file blank upon said bed, as and for the purpose
set forth.
13. The combination of a base having a standard, an oscillating head pivoted
thereto and provided with a reciprocating tool carrier and mechanism substantially as
described for operating and controlling the movement of said carrier, with a
reciprocating hed, to receive a file blank, mechanism to reciprocate said bed, and the
rod N, weighted lever O, and foot or releasing lever P, as and for the purpose
described.
WM. BROOKES & SON,
55 and 56, Chancery Lane, London,
Agents for the Applicant.