An Improved Rotary Machine for Cutting Keyways.
Year: 1892

page_text: Date of Application, 7th June, 1892
Complete Specification Left, 7th Mar., 1893-Accepted, 20th May, 1893
PROVISIONAL SPECIFICATION.
An Improved Rotary Machine for Cutting Keyways.
I, RICHARD WILLIAM RICHARDSON, of The Low Bridge Engineering
Company, in the City and County of Newcastle upon Tyne, Engineer, do hereby
declare the nature of this invention to be as follows:-
The subject of my invention is an improved machine, for cutting keyways in
shafts, the advantages of which are portability, simplicity of construction, efficiency
and economy,
both as to the cost of the machine, and of the work by it.
The machine, which will be preferably horizontal and carried upon an inde-
pendent frame, consists of a driven shaft carrying the rotary cutter which acts like
" milling "tool and is adjustable for various depths of keyways.
The shaft, in which the keyway is to be cut, is fixed at right angles to the rotary
cutter shaft.
"
The rotary cutter and shaft with its driving gear will be so mounted in a sliding
rest or "saddle" that the suitable "feed for varying depths and widths of
keyways can be given to it the feed action being preferably automatic which may
be effected by bevel or worm gear or by a pitched chain or a belt driven from the
cutter shaft or by a screwed spindle or any other well known device and provision
will be made for arresting and withdrawing the tool after the keyway has been cut
to the required length either automatically or by hand for instance by arresting
the forward motion of the revolving cutter and causing it to travel backward by
reversing the operation of the bevel, or worm gear or of the pitched chain or
driven belt or of the screwed spindle or by any other well known mechanical
device. In another form the rotary cutter and shaft with its driving gear may be
stationary and the shaft may be held in a sliding head arranged to travel by suitable
gear the action in this case being similar to that of an ordinary planing machine,
in which the tool is stationary and the work travels.
Each cutter is adapted to cut varying depths but a separate cutter must be used
for each width of keyway.
The machine cuts the key way of the full depth and width at one traverse and
when set for any one size of keyway, being automatic in its operation, requires only
the attention of a boy to ensure a perfect job.
Dated this 7th day of June 1892.
T. J. DANSON,
By L. W., per F. B.
COMPLETE SPECIFICATION.
An Improved Rotary Machine for Cutting Keyways.
I, RICHARD WILLIAM RICHARDSON, of The Low Bridge Engineering
Company, in the City and County of Newcastle upon Tyne, Engineer, 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:
The subject of my invention is an improved machine, for cutting keyways in
shafts, the advantages of which are portability, simplicity of construction, efficiency
and economy, both as to the cost of the machine, and of the work done by it.
The machine, which will be preferably horizontal and carried upon an inde-
pendent frame, consists of a driven shaft carrying the rotary cutter which acts like
milling' "tool and is adjustable for various depths of keyways.

page_text: De effected by bevel or worm gear or by a pitched cham or a belt driven from the
cutter shaft or by a screwed spindle or any other well known device, and provision
will be made for arresting and withdrawing the tool after the keyway has been cut
to the required length either automatically or by hand for instance by arresting
the forward motion of the revolving cutter and causing it to travel backward by
reversing the operation of the bevel, or worm gear or of the pitched chain or
driven belt or of the screwed spindle or by any other well known mechanical
device.
Each cutter is adapted to cut varying depths a separate cutter must be used for
cach width of keyway.
The machine cuts the keyway of the full depth and width at one traverse and
when set for any one size of keyway, being automatic in its operation, requires
only the attention of a boy to ensure a perfect job.
DESCRIPTION OF DRAWINGS.
On the accompanying drawing I illustrate my invention as I am carrying it
into practical application but I do not restrict myself to the details of construction
my object being to produce a simple and efficient machine at moderate cost.
Fig. 1 is an end view of the machine arranged horizontally and Fig. 2 is a side
view of the sliding head and a portion of the fixed table which carries the shaft
the milling tool being shewn in its lowest position.
Although I mention in my Provisional Specification that the rotary cutter may
be fixed and the shaft made to travel I have since found that such an alternative
form is objectionable and I do not intend to apply my invention in that form.
The shaft in which the keyway is to be cut is fixed in the V shaped part 1 of
the table 2 by clamps and T headed bolts in the grooves 3. The headstock 4
sliding in grooves in the table 2 carries the whole of the driving and adjusting
gear the former comprising a vertical spindle 5 carried in bearings 6 and 6ª and
having on its bottom end a bevil wheel 7 which is driven by a similar wheel 7*
carried in a bearing 8 on the bracket 9 (on which is also the bearing 6*) on the
headstock and sliding by a key in the groove cut along the main driving shaft 10
which may be driven in either direction by open and crossed belts. The beril
wheel 11 drives the bevil wheel 12 the spindle of which, working in the long
bearing 13 on the vertical slide 14 carries on its outer end the milling tool 15.
The slide 14 also carries the bracket bearing 6 in which runs the bevil wheel 11 a
key in which working in the slot cut in the spindle 5 causes it to be driven as the
slide 14 is adjusted at various heights to suit the diameter of the shaft in which
the keyway is to be cut the adjustment being effected by the screw 16 fixed in the
bracket 17 and working in a tapped nut 18 in the slide being revolved by the hand
wheel 19 and causing the slide 14 to move up or down in the headstock 4 and to
move with it the cutter and spindle the bevel wheels 11 and 12.
The feed is given to the milling cutter by the screw 20 fixed under the table 2
which being revolved in one direction causes the tapped bracket 21 to move the
headstock forward and with it the cutter till the required length of the keyway is
cut when the screw being reversed the cutter returns to the starting point. This
arresting and withdrawing of the cutter may be automatic but it can be more
simply effected by the attendant reversing the action of the gear which drives the
feed screw.
The feed screw of the cutter may be driven from the main shaft 10
by any of the ordinary and well known methods by which varying speeds can be
obtained.
Instead of the ordinary milling cutter I may use that adjusting form which

page_text: allows of varying the width and so avoid changing the cutters for different widths
of keyways.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1st. A keyway cutting machine operating by a rotary cutter, or "milling" tool,.
mounted in an adjustable frame, to suit varying diameters of shafts, and driven by
gearing which, with the adjustable frame, is carried by a "beadstock" sliding in
grooves in a fixed table, which holds the shaft, and which gearing is driven by a
main shaft on which the "driver moves with the "headstock as the cutting
proceeds, by the operation of a "feed screw driven by suitable gearing from the
main shaft adapted to give the proper
"feed to the cutter substantially as
described.
יי
"
"
2nd. A rotary machine for cutting keyways consisting of the various parts in
combination, arranged, constructed and operating substantially as described and
shewn on the drawing herewith.
D
L 1
M 1002
T. J. DANSON, F. Inst. P'.A.,
Chartered Patent Agent,
2, St. Nicholas' Buildings, Newcastle-upon-Tyne, Agent for Applicant.