Improvements in File Cutting Machines.
Year: 1893

page_text: COMPLETE SPECIFICATION.
Improvements in File Cutting Machines.
I, JEAN BÊCHÉ, the Younger, of 10, Langestrasse, Hückeswagen, near Elberfeld,
in the Empire of Germany, Engineer, do hereby declare the nature of this inven-
tion 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 file-cutting machines in which a chisel attached to a.
falling weight or hammer is employed to produce the necessary serrations in the
blank.
A file cutting machine according to this invention is shewn in the annexed
drawing, in which :-
Figure 1 is a front view, and
Figure 2 a side view of the machine.
Figure 3 shews the mechanism for feeding forward the blank under treatment.
The hammer A. slides in vertical guides, and is actuated by the connecting rod z
coupled to a crank formed on the driving shaft y. At the lower end of the rod z
there is formed a yoke fg, which embraces a roller q fitted to the lever device i, k.
On the rod z there provided the catch a, which, when the rod rises, engages with
the collar d of the hammer and therefore raises the hammer until the inner face of
the yoke f g comes into contact with the roller attached to the lever device i k,
whereby, as the movement continues, the rod z is pressed away from the hammer,
the catch a releases the collar d, and the hammer drops. The position of the
collar d may be adjusted by means of the nuts band c. By the falling of the
hammer a cut is produced in the blank under treatment.
9
The depth of the file-cut (which may be regulated either by hand or auto-
matically) is directly dependent upon the stroke of the hammer and this stroke is
arranged so that it can be adjusted by means of the levers h ki and the screw
coupling . By means of the coupling / the connecting rod between h and kis
lengthened or shortened, so that the position of the roller is changed, and the
disengagement of the catch a from d takes place sooner or later, and the height of
the stroke of the hammer is increased or reduced.
The feeding forward of the carrier upon which the blank under treatment is
placed is accomplished by means of the pawl and ratchet device u, operated from an
eccentric upon the driving shaft y, the wheel u being revolved to the extent of one
or more teeth for each cut of the chisel. The motion of the ratchet wheel u is
transmitted to the bevel wheel by means of the bevel wheel 1, whereby the
screw-spindles is turned. Connected with the screw-spindle is the slide which
carries the file, and for every turn of the spindle the slide is moved backward or
forward, as the case may be, a certain distance. The bevel wheel ¹ runs loosely
upon the shaft n and is adapted to gear on one side with the clutch coupling t
keyed to said shaft, whilst on the other side is formed a hollow shaft against which
the pinion w (which also runs loosely on shaft n) abuts.
In order to reverse the motion of the carrier, the pinion wis tightened up against
the hollow shaft of the bevel wheel by means of the hand-wheel o. The bevel
wheel is then caused to revolve in the reverse direction by the spur wheel e
gearing with pinion w, the spur wheel e being driven by eccentric, ratchet, and belt
gearing, from the shaft y. The spur wheel e is also provided with a hand wheel v,
by which the carrier may be quickly returned.

page_text: Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. In a file cutting machine of the type described, the means of regulating the
height to which the hammer is to be raised, consisting of the connecting rod 2
provided with the yoke fg, whose inner face engages with a roller carried by the
adjustable lever device h, i, k, l, when such hammer has been raised to the required
height, whereby the catch a is withdrawn from the collar d, and the hammer is
released; arranged and operating substantially as and for the purposes herein
described.
2. In mechanism for operating the blank carrier of file cutting machines of the
type described, the means whereby a quick return of the carrier may be effected,
consisting of the spur and pinion wheels e, w, and hand wheels o, v; arranged and
adapted to operate substantially as described.
Dated this 17th day of April 1893.
CHEESBROUGH & ROYSTON, Fels. Chart. Inst. P.A.,
15, Water Street, Liverpool, Applicant's Patent Agents.