Improvements in File-cutting Machines.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in File-cutting Machines.
I, FERDINAND BOSSHARDT, of the Firm of F. Bosshardt & Co., of 4, Corporation
Street, Manchester, in the County of Lancaster, Patent Agents, do hereby declare
the nature of this invention, which has been communicated to me by "Fabrique
Strasbourgeoise de limes et meulerie à vapour" (Albert Meyer), of Strasbourg,
Alsace, Germany, Manufacturers, to be as follows:-
:~
This invention relates to an improved construction of file cutting machine which
is composed firstly of an inclined carriage adapted to hold the files and forming an
anvil, and secondly of a tool carrier consisting of a hammer actuated by means of a
cam rotated by a shaft. The inclination of the hammer carrier in relation to the
said carriage can be varied at will. The carriage on which the files are placed is
moved by means of a screwed spindle, the ends of which carries a ratchet. wheel
retained in position by a pawl, the rim of which wheel is embraced by a metallic
band which serves as a brake.
At the extremity of the said spindle is also fixed a hand wheel which permits of
returning the said carriage.
To permit of turning the said wheel, the said brake and ratchet are released which
is effected by a lever having three arms. The first of the said arms is formed with a
notched handle, the second carries a pallet and the third by means of a set screw
is fixed to the free end of the said brake.
The arm of this lever opposite the aforesaid pawl is furnished with a bracket in
which moves a pivot fixed to another lever. This lever is fixed upon a shaft which
receives motion, by means of two other levers, from an eccentric fixed upon the shaft
which carries the driving pulleys.
The aforesaid hammer is under the influence of a spring the tension of which may
be increased or decreased.
The file is held in its position whilst being cut by means of a lever having a bowl
and fixed upon an axle carrying a weighted lever. The said weight causes the lever
with its bowl to press upon the file and hold it in position upon the carriage.
During the return of the carriage, the said bowl lever and the setting lever on
the gauge are disengaged by means of a hand lever fixed to one end of a shaft, the
other end of which, by means of two levers raises the aforesaid weighted lever and
by means of three other levers the aforesaid setting lever.
Deted this 7th day of Tu.. 100%
F. BOSSHARDT & Co.,
Agents to Applicant.
COMPLETE SPECIFICATION.

page_text: the nature of this invention, which has been communicated to me by "Fabrique
Strasbourgeoise de limes et meulerie à vapour" (Albert Meyer), of Strasbourg,
Alsace, Germany, Manufacturers, 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 a machine for cutting files and embodies various
mechanical arrangements which combined provide a machine which is easy to
manipulate, ensures perfect work and may be used for cutting files of any size.
And in order that my invention may be more fully understood I have caused to
be appended hereunto one sheet of drawings marked with letters of reference indicat-
ing like parts in the various figures, Fig. 1 being a back view, Fig. 2 a side view,
Fig. 3 a front view, Fig. 4 a plan of my improved machine complete, Fig. 5 is a view
of its hammer, Figs. 6 & 7 are details of the brake of the feed motion and the
carriage supporting the file.
The chief component parts of the machine are;-
1. A carriage (A) supporting the file, inclined forming an anvil,
2. A tool holder (B) comprising a hammer actuated by a cam (C) rotated by the
driving shaft.
The degree of inclination of the hammer and tool holder relative to the said
carriage may be varied at will.
The carriage supporting the files is moved by means of a screw threaded spindle 3.
The extremity of this spindle carries a ratchet wheel the rim of which is enlarged
and embraced by a metallic band serving as a brake.
This brake is adapted to ensure a perfect regular feed or forward movement of
the aforesaid carriage.
Without the application of this brake the momentum of the moving parts pro-
duces jerks which causes the teeth of the file to be cut at irregular distances from
each other.
On the extremity of the screw threaded spindle 3 is fixed a hand wheel 5 which
permits of returning the said carriage, after each travel to its starting point.
In order to be able to turn the said hand wheel, the brake and the pawl of the
ratchet wheel are to be disengaged.
For this purpose a three armed lever 6, 7, 8 is employed upon the said screwed
spindle between the said hand wheel and ratchet wheel, the arm 6 of which is
furnished with a notch handle which serves to retain the said lever in its two extreme
positions. The second lever arm 7 carries a pallet which, in one of the extreme
positions causes the pawl 4 to be lifted in such a manner as to cause it to disengage
the teeth of the ratchet wheel, by means of a set screw the third lever arm 8 is con-
nected to the free end of the said brake and disengages the same also in one of the
extreme positions of the lever 6, 7, 8.
It will thus be readily seen that by moving the lever 6 in one direction, the pawl
will engage and by moving it in the other disengage and thereby permit the turning
of the hand wheel.
The pawl 4 of the ratchet wheel is fixed upon the lever 2b pivoted to the spindle
which moves the carriage.
The branch of this lever opposite to the said pawl is formed with a slot in which
is adapted to slide a stud 10, which is fixed to a second lever 2ª. The latter is fixed
upon a shaft 11 which is oscillated by means of the levers 12, 13 and the eccentric 15
fixed upon the shaft which carries the driving pulleys.
By adjusting the stud 10 in the lever 2ª, the feed of the ratchet wheel can be
regulated according to the fineness of the cut of the files desired.
The hammer holder (Fig. 5) is hollow and adapted to receive in its longitudinal
and cylindrical cavity, cylindrical weights of lead or the like, which serve to
increase or diminish the weight of the hammer as may be required.
Upon the upper end of the hammer (Fig. 3) presses a spring R the tension of
which may be increased or diminished at will by means of a lever 16 rendered
adjustable by nuts on the screwed spindle fixed to the upper extremity of the said
spring opposite its point of support.

page_text: The arrangement for increasing or diminishing the weight of the hammer is of
great value and advantage as adapted in this machine or in any other for cutting
files of different sizes.
The spring does not act like the weight of the hammer. The blow of the hammer
in the latter case is more elastic. The tension of the said spring varies in the
different positions of the file being cut by the tool, in other words at the higher
parts of the file, the tension of the said spring is greater than at the lower parts
thereof. This result is obtained by means of the lever 17 which bears against the
plate 18 shaped conform with the face of the file to be cut. When the lever 17
ascends the spring R is tensioned by the aid of the rod 14 and lever 16 interposed.
During the cutting, the file is maintained in its position by a lever carrying an
anti-friction bowl 19 fixed upon the same shaft as the counterweight lever 20.
This counterweight acts upon the said bowl lever and retains the file securely upon
its support.
During the return movement of the carriage, the lever 19 and the lever 17 upon
the plate 18 are disengaged. For this purpose the lever arm 20 when raising acts
upon the counterweight lever 20 through the intermediate levers 21, 22; and upon
the lever 17 by means of levers 23, 24, 25.
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 what
I claim is:
In machines for cutting files.
1st. A feed motion for the file carriage wherein the disengagement of the ratchet
pawl and of the brake herein before referred to is effected by a single movement of a
lever, all substantially as set forth.
2nd. The arrangements of levers which actuate the ratchet wheel and permit of
varying the feed or forward movement of the file carriage according to the degree
of fineness of the cut of the files desired, all substantially as set forth.
3rd. The hollow hammer adapted for the reception of weights more or less heavy,
for the purpose of varying the weight of the hammer, all substantially as set forth.
4th. The arrangement and combination of the levers which disengage during
each return movement of the file carriage the anti-friction bowl which bears upon
the file shaped plate and the pressure bowl which maintains the file in its position
during the cutting, all substantially as set forth.
Dated this 6th day of January 1898.
F. BOSSHARDT & Co.,
4, Corporation Street, Manchester, Agents to Applicant.