Improvements in the Method of and in Apparatus for Auto- matically Boring and Setting Out Holes in the Bosses of Pulleys and the like.
Year: 1893

page_text: Date of Application, 13th Mar., 1893
Complete Specification Left, 4th Nov., 1893-Accepted, 27th Jan., 1894
PROVISIONAL SPECIFICATION.
Improvements in the Method of and in Apparatus for Auto-
matically Boring and Setting Out Holes in the Bosses of
Pulleys and the like.
I HENRY CROWTHER of the Rolling Mills, Cleckheaton in the County of York,
Engineer, do hereby declare the nature of this invention to be as follows:
The object of my invention is to automatically bore (at equal distances apart and
of any required uniform depth) the bosses of wheels and other round objects.
I employ an ordinary lathe bed with gap, upon the lathe bed at each end is a
sliding head operated by screws, and each having an horizontal spindle carrying
the required drills for boring two holes at once, in the centre of the gap is a
vertical spindle capable of being raised or lowered as required by screw and
wheels.
Upon the spindle are top and bottom loose cones between and upon which the
bosses to be bored are placed and secured, the cones fitting the various sized holes
in same; upon the vertical spindle is a large pinion wheel, gearing into a smaller
pinion upon a stud, upon which is a second or change wheel gearing with a pinion
upon a vertical shaft, the stud is carried in a slot in a bracket on the gantry so as
to be adjustable.
The vertical shaft terminates in a bevel wheel, gearing with a bevel wheel upon
a horizontal shaft upon bracket on gantry, upon this shaft is a tappet with recess
and a pivotted catch weighted above the tappet, on the boss of the tappet is a
tooth or
projection which operates upon a forked lever suspended above the tooth
of the boss of the tapet, above the forked lever in a boss of the bracket (attached
to the gantry) is a rod or plunger having on its end a spring catch, the plunger is
connected at its other end by connecting rod to the pin of a crank arm, connected
by rod passing through the gantry to a second crank arm on the other side of the
gantry and by connecting rod to disc keyed upon a cross-shaft at the end of the
lathe bed, upon this shaft is a loose double ended lever having a slide rod from its
lower end, sliding in a fixed bracket at the gantry side, upon the rod at each side
of the bracket is a boss, with set screws for adjustment, upon the disc on each side
of the loose lever are studs or projections.
Upon the cross shaft is a boss with two fingers which engage in the annular
groove of a sliding clutch upon the central shaft, having teeth at each side
engaging alternately with corresponding teeth in the bosses of pinion wheels of the
central screwed shafts passing under their respective sliding lathe heads, operating
the said lathe heads in a forwards or backwards direction so bringing forward or
with-drawing their boring tools; as the fixed bracket comes in contact with one or
other of the bosses upon the slide rod, it operates the weighted lever which in turn
comes in contact with the studs of the disc and operates the connecting rods which
draws backwards the plunger pauses for the weighted lever to get over the centre,
and the drills drawn back clear of the holes they have bored, the plunger then
moves forwards, releases the spring lever and spring key which engages in one of the
series of keyways within the boss of the loose pinion on the end of the horizontal
shaft, so making it fast upon its shaft whilst it turns the vertical spindle the required
distance for the next holes. The tappet now lifts the forked lever, and the pinion
wheel is again loose until the boring is again accomplished.
The spring lever which depresses and releases the spring key is preferably in a

page_text: recess in the bracket attached to the gantry and is operated by the spring catch in
the end of the plunger, any arrangement of speed wheels may be used.
Dated this Eleventh day of March 1893.
JOHN E. WALSH,
Crossley Street, Halifax, Patent Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in the Method of and in Apparatus for Auto-
matically Boring and Setting Out Holes in the Bosses of
Pulleys and the like.
I, HENRY CROWTHER of The Rolling Mills, Cleckheaton in the County of
York, 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 object of my invention is to automatically bore (at equal distances apart,
and of any required uniform depth) the bosses of wheels, pulleys, and other round
objects.
The object of my invention is to automatically bore (at equal distances apart,
and of any required uniform depth) the bosses of wheels, pulleys, and other round
objects.
DESCRIPTION OF DRAWINGS.
Fig. 1. is a plan of my improved machine for boring and setting out holes in the
bosses of wheels, pulleys, and the like.
Fig. 2 is a front or side elevation of Fig. 1.
Fig. 3. shows mechanism for operating the weighted lever.
Fig. 4. shows an enlarged view of plunger, spring lever, tappet, and cam for
operating the mechanism of vertical spindle carrying the pulley bosses to be
bored.
Fig. 5. is an end view of Fig. 4.
Fig. 6. shows sectional elevation of spring key, employed for operating the
setting out mechanism.
I employ an ordinary lathe bed A, with gap, upon the lathe bed at each end is a
sliding head A¹, operated by central screwed shafts A2, and each having a hori-
zontal spindle B, carrying the required drills B¹ for boring two holes at once.
In the centre of the gap is a vertical spindle C, capable of being raised or
lowered, so as to adjust vertically the position of the pulley boss to the drills as
required, by screw and hand wheel D.
Upon the spindle C are top and bottom loose cones C, between and upon which
the bosses C³ to be bored are placed, and secured by means of the nut C³, the cones
fitting the various sized holes in the said bosses.
Upon the vertical spindle C is also a large pinion wheel E, gearing into a smaller
pinion wheel E', upon a stud E2, upon which is a second or change wheel F, gearing
with a pinion Fi, upon a vertical shaft F2, the stud E2 is adjustable within a slot G
in the bracket G¹, according to the varying sizes of the change wheel F, such
adjustment being for varying the number of holes required to be bored in the
pulley bosses as desired, the bracket G¹ may be secured to the side of the lathe bed
or gantry, or in any other suitable position.
The vertical shaft F2 terminates in a bevel wheel H, gearing with a bevel
wheel H' upon a horizontal shaft H2, such shaft being supported by brackets H³,
attached to the lathe bed or gantry.
Upon the said shaft H2, is mounted a tappet J with recess, and a pivotted
catch J, weighted above the tappet J by means of weight J', upon the boss
of the tappet J is a tooth or projection J³, which operates upon a projection

page_text: or stud K, upon a forked lever K¹, suspended above the tooth of the boss of the
tappet J.
Above the forked lever in a boss of the bracket H³, (attached to the gantry), is
a rod or plunger L, having on its end a spring catch L, which operates upon a
spring lever L, pivotted within the bracket H³, this spring lever bears against and
holds down a suitable spring key V, placed within a recess in the horizontal
shaft H2, when the spring key is released, it is forced into one of a series of keyways
within the loose pinion H, upon the said shaft H2, by means of a small spiral
spring H, upon a stud H, see Fig. 6, so making the loose pinion H* fast upon the
said shaft for the time being.
I also employ a pivotted fulcrum lever W, one end of which works within a slot
or recess W1, in the spring lever L, this lever is connected to the forked lever K¹,
upon or near the other end of the said lever W, and bearing upon same, is the
weighted catch lever J, so that when the spring lever is moved out of contact with
the spring key, the fulcrum lever W (by means of weighted catch lever J) drops,
and holds the spring lever clear of the key, see dotted lines in Fig. 4, until (as the
shaft H2 revolves), the projection J³ upon the boss of the tappet, comes in contact
with the projection or stud K, upon the forked lever K, and along with the tappet
lifts the same, upon which the spring lever immediately resumes its original
position, depressing the key until the next operation.
The plunger is connected at its other end by connecting rod L², to the pin of a
crank arm L³, connected by rod M passing through the gantry to a second crank
arm M', on the other side of the said gantry, and by a second connecting rod M²,
to a disc N, keyed upon a cross shaft N' at the end of the lathe bed, upon this shaft
is a loose double ended weighted lever P, having a slide rod P, from its lower end,
such rod sliding within a fixed bracket P2, attached to one of the loose heads upon
the bed or gantry.
Upon the rod P' at each side of the bracket P2, is a boss R, with setscrews for
adjustment, upon
the disc N, on each side of the loose lever P, are studs or
projections N¹
Upon the cross shaft N' is a boss S, with two fingers S¹, which engage in the
annular groove S', of a sliding clutch S³, upon the central shaft A2, having teeth
at each side, engaging alternately with corresponding teeth in the bosses of
pinion wheels T, of the central screwed shaft, the said clutch being operated
by the loose lever P, and is for operating the said lathe heads in a forwards
or backwards direction, so bringing forward or withdrawing their respective
boring tools.
As the fixed bracket P2 comes in contact with one or other of the bosses R, upon
the slide rod P', it operates the loose weighted lever P, which when it reaches a
vertical position, falls forward and comes in contact with the studs N2 upon the
disc N alternately, the said lever simultaneously operates the connecting rods and
cranks L, L, M, M', and M³, which draw the plunger backwards, where it
remains until the weighted lever arrives at a vertical position, and as it falls to
the other side of the disc N, it moves the plunger forward, the spring catch L'
comes in contact with the pivotted spring lever L, moving same out of contact
with and releases the spring key V, which immediately engages in one of the
keyways of the loose pinion H', upon the horizontal shaft H, allowing the said
shaft to make one revolution, when the tappet and stud J³ operating on the fulcrum
lever, releases the spring lever as before described.
As the shaft H2 makes the said revolution, it operates upon the gear
wheels H, H', F', F, E', and E, in such a manner as to move the spindle which
carries the pulley boss the required distance for another series of holes to be
bored by varying the size or number of teeth of the change wheel F, a greater
or smaller number of holes may be bored in the said bosses as desired.
The action is as follows:-
When the pulley has been adjusted upon the vertical spindle C, and the machine
set in motion by means of driving shaft X, operated by a train of wheels from the

page_text: strap pulley or cone 7, the loose heads A' are operated by means of the right
and left hand screwed shafts A²; the loose heads A¹ feed the drills B¹, during
which operation the bracket P2, upon the loose head A¹, operates upon the sliding
rod P', connected to one end of the loose weighted lever P, upon the cross shaft N,
until the weighted lever P assumes a vertical position, by which time the holes in
the pulley boss have been bored the required depth, the loose weighted lever P
then tilts over upon the stud N2 on the disc N, and by means of the sliding
clutch S³, reverses the gearing, withdrawing the drills, and simultaneously draws
back the plunger L.
When the drills have been withdrawn from the pulley boss, that is, when the loose
weighted lever is again in a vertical position, the said lever falls to the other side
of the disc, simultaneously moving the plunger L forward, the said plunger
operating upon the mechanism before described, moves the pulley boss the
requisite distance for another pair of holes to be bored, the sliding clutch S³
having also been moved, reverses the gearing feeding the drills, and boring the
necessary holes as before described, this motion is continued until the required
number of holes have been bored in the said bosses, when a fresh boss is placed
upon the spindle and the operation repeated.
By this construction of machine for drilling or boring holes in the bosses of
wheels, pulleys, and the like, each hole is automatically set out and bored in an
accurate and true manner and is a great saving in time and labour.
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 machines for drilling or boring holes in the bosses of wheels, pulleys
and the like, the automatic setting out mechanism substantially as shown and
described.
2. For automatically setting out holes, the combination of vertical spindle C,
operated by the vertical shaft F2 which is operated by shaft H³, tappet J, catch J',
weight J², tooth J³, stud K, forked lever K', plunger L, spring catch L', spring
lever L, spring key V and fulcrum lever W, as and for the purposes substantially
as shown and described.
3. For operating the setting out mechanism in drilling machines, the combination
of the sliding head A', with bracket P2, rod P1, with collars R, weighted lever P,
disc N, with projections N2, lever M, crank M³, rod or shaft M, crauk L³ and
connecting rod L, substantially as shown and described.
4. The method of and apparatus for automatically boring and setting out holes
in the bosses of pulleys and the like substantially as and for the purposes shown
and described.
Dated this Third day of November 1893.
JOHN E. WALSH,
Crossley Street, Halifax, Patent Agent for the Applicant.