IMPROVEMENTS IN MACHINES FOR CUTTING FILES AND OTHER SERRATED TOOLS
Year: 1885

page_text: I, AMBROSE SHARDLOW of Bridge Street Attercliffe in, the County of York,
Engineer, do hereby declare the nature of my said invention for IMPROVEMENTS
IN MACHINES FOR CUTTING FILES AND OTHER SERRATED TOOLS to be as follows:-
My invention relates to Improvements in the machinery for cutting files and
similar tools described in the Specification of my Patent N° 4660, 1883, the object
being to simplify the construction, and give greater facilites for the rapid working
of the machine.
In carrying out my preasent invention I construct the machine with a single side
standard arranged to carry the drawing shaft, the slide, or ram, and chisel, for the
purpose as described in my former specification, but instead of the driving shaft
being fixed at right angles with the sliding bed or file holder, I now arrange it
parallel with the side bed, as by this arrangement, I am enabled to bring the band
wheel, used for adjusting purposes, in a much more convenient position for the
hand of the workman.
The traversing movement of the sliding bed upon which the file blank is fixed,
is obtained from the main shaft in the first place, actuating a worm and worm-
wheel; the wormnwheel is secured upon a shaft carrying a pinion geared into a rack
fixed on the underside of the sliding bed.
There is a clutch motion so arranged that when in gear, the pinion is carried
round, and acting on the rack, drives forward the bed; but when the clutch is
drawn out of gear, the pinion remains stationary while the shaft revolves.
Thus the workman is able to release and stop the bed, and also to slide it by a
direct movement or pull, from one end to the other as he may desire.
In my former machines the bed has to be wound back by means of the screw.
The various mechanical details of the machine are arranged so as to carry out
these the principal points of my invention.

page_text: Improvements in Machines for Cutting Files and other Serrated
Tools.
I, AMBROSE SHARDLOW of Bridge Street, Attercliffe in the County of York
Engineer do hereby declare the nature of my invention for IMPROVEMENTS IN
MACHINES FOR CUTTING FILES AND OTHER SERRATED TOOLS and in what manner
the same is to be performed, to be particularly described and ascertained in and by
the following statement, that is to say :-
My invention relates to improvements in Machines for cutting Files, Reaper
sections, and other similar serrated tools or impliments, and especially in the
machine described in the Specification of my Patent N° 4660, 1883, the object
being to simplify the construction and to give greater facilities for the rapid
working of the Machine.
And in order that my invention may be clearly understood I annex a sheet of
drawings illustrating the same, like letters of reference indicate like parts in any
of the figures.
Fig. 1, is a front elevation of a Machine constructed according to my invention.
Fig. 2, is a side elevation of same.
In carrying out my invention, I construct the machine with a single-side
standard A. to carry the driving shaft B, the slide C, and chisel D, for the purpose
as described in the specification of my former Patent, but instead of the driving
shaft being fixed at a right angle with the sliding bed E, I now arrange it parallel
with the said bed. This arrangement enables me to bring the hand wheel F,
which is constantly required for adjusting purposes, in a much more convenient
position for the workmen to operate.
The traversing motion of the sliding bed E upon which the file blank is held
while being cut, is obtained from the main or driving shaft (in the first place)
actuating a worm and worm wheel G-through the medium of a cam or eccentric H,
and ratchet motion I.
The worm wheel is fixed upon a shaft passing through that part of the standard
or bed marked J, and in a central position with respect to the travel of the sliding
bed E, it also passes through the pinion K, which is attached to a sleeve carrying
a small hand wheel L, and one part of a clutch M, the corresponding part M, being
secured by a key (but having thereon a sliding motion) on the worm wheel shaft.
N, is a lever to move the clutch in and out of gear.
The remaining details of mechanism are somewhat similar to those described in
my former Specification before mentioned..
It will thus be seen that by means of the arrangement of the clutch motion
before described the pinion may be revolved or stopped instantly, by a movement
of the handle N. The pinion is geared into a rack fixed to the underside of the
sliding bed E, by which arrangement the bed is traversed by the intermittent
motion of the ratchet movement I, communicated through the worm and worm-
wheel G, and clutch M, and the various degrees of coarseness of the teeth of the
file (or other article) are produced either by altering the position of the connecting
pin of the connecting rod and ratchet lever, or by removeable ratchet wheels I, or
both combined,

page_text: When the clutch is out of gear, the sliding bed E, may be moved backwards or
forwards from end to end by a direct pull, the pinion always remaining in gear
with the rack; this arrangement saves much time, as it avoids winding back, as
when a screw and solid nut are used, and has not the objections that are attached
to a split or clasp nut and screw.
P, is a brake to control the wormwheel shaft, Q, is a weight connected with
holding down levers to fix the file blank upon the bed; R R are the fast and loose
pulleys.
In the drawings some portions are omitted, to show the other parts more
distinctly as is usual in mechanical drawings, but the principle of my invention is
clearly shown.
Having now particularly described and ascertained the nature of my said
invention and the manner in which it is carried into effect, I declare that what
I claim is
1st The Machine for cutting the teeth of files and other toothed implements or
cutters, substantially as herein before described and as illustrated.
2nd In Machines for cutting files, and other serrated tools or cutters; the
traversing motion for the sliding bed, constructed substantially as hereinbefore
described and illustrated.