Year: 1893

page_text: Date of Application, 30th Oct., 1893-Accepted, 16th Dec., 1893
Fig. 2 is an end and cross section on line A-B of Fig. 1.
Fig. 3 represents a plan view and
Fig. 4 a sectional view of set-screw, table, and files in secured position ready
for surfacing.
a is the foundation bed or plate and b a travelling table to the sides of which are
screwed adjustable templets s. The position of these templets represents the form
of outer face of blank required and to which the file must be cut.
A cylindrical cutter e made to revolve at high speed and mounted in bearings at
the end of reciprocally movable arms d attached to the shaft c, engages the files
secured on the travelling table between the templets which form the rests for the
said cutter e.
The forward traversing motion is imparted to the table from the shaft c supported
in bearings in standards u by pulley R bevel gear and feed screw shaft f mounted
in bearings and engaging in a divisible nut m.
The rear movement is effected by means of hand wheel with pinion and rack k
after the nut m has been thrown out of gear with the feed screw shaft ƒ by means
of the lever g.
The operation of the machine is as follows:
After the templets s have been adjusted to the form of blank required, the files a¹
are fastened on the table by set-screws inserted in slots 10, packing pieces 1 being
placed between them as shown in the drawing. To keep the files firm, their ends
are made to rest on wedges not shown in the drawing.
The machine is then set in motion by throwing the driving belt on pulley R
giving motion to the feed screw shaft f, which, being geared to the table by means
of the nut m, imparts an equal traversing motion to the former. Meanwhile the
cylindrical cutter e being made to revolve at high speed from pulley O removes
all the old cuts or teeth of the files as the latter are worked forward with the
table.
When the table has reached its forward limit and the files have been cut blank
for their whole length, the former is withdrawn to its original position by throwing
same out of gear with the feed screw shaft by means of lever g and imparting to it
a rearward motion by means of the hand wheel h, pinion keyed on to the shaft of
same and rack k.
In this way the table can be so adjusted as to enable any defective places to be
re-cut.
The machine can be worked by hand by attaching an ordinary rim wheel with
crank instead of pulley to the shaft.
My invention can of course be used for surfacing other objects besides files, it
being merely necessary to fix suitable templets.

page_text: I am aware that planing machines exist which are supposed to effect the object
of my invention; such machines, however, leave the files with very uneven surfaces,
necessitating an after-grinding by hand, and are, moreover, of a nature easily liable
to get out of order; whereas, in my machine, the blanks are ready for immediate
re-cutting the machine is less complicated and thus less liable to get out-of
order.
;
Three or more files can be cut simultaneously in my machine as required.
Having now particularly described and ascertained the nature of my said inven-
tion and the manner in which same is to be performed, I declare that what I
claim is :-
1. Machine for surfacing of files or similar objects in which a cylindrical cutter e
revolving at high speed and resting on templets s is made to engage the files or
other objects a' secured between said templets s on a travelling table a substantially
as described and shown in the drawings.
2. In a machine for surfacing files or other similar objects, the combination of
templets & with the travelling table a and file fastening device w for fastening two
or more files simultaneously, substantially as set forth and shown in the drawings.
3. In a machine for surfacing files or other similar objects, the combination of
reciprocally moveable arms d attached to the shaft c with the cylindrical cutter e,
the templets and the table a, substantially as described and shown in the
drawings.
Dated this 30th day of October 1893.