provements in Drilling Machines and the Method of Driving the same at Different Speeds from a Shaft Revolving at One Uniform Rate.
Year: 1888

page_text: PROVISIONAL SPECIFICATION
Improvements in Drilling Machines and the Method of Driving the
same at Different Speeds from a Shaft Revolving at One Uniform
Rate.
I, JOSEPHI PARKINSON, of Chester Street, Bradford, in the County of York,
Machino Maker, do hereby declare the nature of this invention to be as follows
This invention has for its object, the combination and construction of a simple and
novel mechanical arrangement suitable for upright and breast drills; and the provision
of means whereby different speeds may be obtained from a driving shaft revolving at
an uniform speed; which may be accomplished in the following manner.
a
I mount the drilling head to a vertical standard, and arrange the table to be
supported by the said standard; the table being moved in an upward direction by
lever for giving the cutting feed; or the feed may be obtained by any well known
means; the resistance at the opposite end of the spindle being supported by a screwed
rod, to which I attach a cap for giving pressure to the drill on the removal of the
drilling head from the standard and used as a breast drill.
On the driving shaft of the machine, I secure a compound wheel on which are
toothed rims of various diameters; and on the driven or drill spindle I mount as
many wheels as there are rims of teeth on the compound wheel.
The wheels on the driven or drill spindle may be arranged so that on moving one
wheel into gear with one diameter of the compound wheel, the others are clear; or
the driven wheels may be arranged so that when one is in gear for driving, the other
runs with the spindle or is free thereon as an "idler."
In the drill spindle I cut a key recess, and in each wheel secure a key, the wheels
being coupled by double bell crank levers mounted and connected together in such a
manner that, on operating the same, the wheels in connection therewith are moved
simultaneously, one into gear with the compound wheel, and the other out; or the
wheels on the drill spindle may be connected by cutting on the boss of one a right
hand, and on the boss of the other a left hand thread; the two wheels being coupled
together by a sleeve 'having similar threads, so that on turning the sleeve, the wheels
are moved, one into gear with the teeth of the compound wheel, and the other out
of gear; the sleeve being retained in its position by pins inserted in a groove in the
spindle.

page_text: The drill spindle may also be operated by cutting a keyway in each wheel, and a
longitudinal recess in the spindle, in which I place a sliding key of such length as to
engage with one wheel and extend some distance through the other; a portion of the
said sliding key projecting beyond the recess into the key way of the wheel, another
portion being reduced to the depth of the longitudinal recess, so that on turning the
wheels until the key ways are opposite each other; the key can be moved from one
wheel to the other; thus connecting or keying either wheel gearing with the
compound wheel, and thereby driving the said spindle at the speed required.
Dated this 17th day of April 1888.
COMPLETE SPECIFICATION.
Improvements in Drilling Machines and the Method of Driving the
same at Different Speeds from a Shaft Revolving at One Uniform
Rate.
I, JOSEPH PARKINSON, of Chester Street, Bradford, in the County of York,
Machine Maker, 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:
This invention has for its object, the construction and combination of simple and
novel mechanical arrangements suitable for upright and breast drills; and the
provision of means whereby different speeds may be obtained from a driving shaft
revolving at one uniform speed; and consists in arranging a drilling head so that it
may be supported by a standard, and when removed therefrom, the apparatus may be
used as a breast drill, the bevel driving wheel being arranged with two or more rims
of teeth, and the drill spindle with as many bevel wheels as there are rims of teeth on
the driving bevel wheel.
The wheels on the driven or drill spindle may be keyed thereon by a feather key
secured in each wheel which extends. into a groove cut in the spindle, the wheels
being so connected together that when one hevel wheel is engaged with its corre-
sponding toothed rim on the driving wheel, the other is out of
gear and therefore does
not actuate the spindle, the said wheels being moved on the spindle in or out of gear
by bell crank levers; or by cutting a right hand thread on the boss of one wheel and
a left hand thread on the other, the two bosses being connected by a sleeve having
similar threads; or the keying of the wheels may be effected by placing a sliding key

page_text: The arm spine, the said key projecting
спотр
ference of the spindle in such position that when engaging in the keyway of one
wheel, the key is clear of the other so that, on sliding the key in the groove to
engage with one of the wheels, the other is free to revolve on the spindle as an
"idler."
In describing my invention more in detail reference is made to the accompanying
drawings in which,
Fig. 1. represents a side view of a breast drill arranged according to my invention
and fixed to a standard.
Fig. 2. is a view of the same removed from the standard.
Fig. 3. is a side view of my improved means of driving applied to a drill frame of
larger dimensions.
Figs. 4. and 5. are detail views, one of which is partly in section.
Fig. 6. a detail of a clip and end of one of the bell crank levers.
Fig. 7. is a section through a pair of wheels on the drill spindle the latter being
shown partly in section for illustrating the sliding key, and,
Fig. 8. a detail of another mode of operating the driven wheels on the drill
spindle.
The detachable drilling head A. may be mounted to a vertical standard A' and tho
drill table B. supported by the said standard, the table being moved in an upward
direction by a lever B₁ for giving the cutting feed to the drill; the resistance at the
opposite end of the spindle being supported by spindle D. and locking nut D', to the
end of the former of which I attach a cup D for giving pressure to the drill when
removed from the standard A' and used as a breast drill.
On the driving shaft of the machine driven by the handle E. or by a hand wheel, I
secure a compound. wheel on which are shown two toothed rims F. and F¹ the latter
being much smaller in diameter than the former; and on the drill spindle G. I mount
as many bevel wheels as there are rims of teeth on the compound wheel, and which
may be placed in operative gear in the following manner.
The drill spindle G may be actuated by cutting a keyway in each wheel H. and H¹
and a longitudinal groove or key bed in the spindle (see Fig. 6) in which I place a
sliding key J. of such length as to extend a convenient distance above wheel H¹ to the
collar K. to which the key is attached. This key is reduced in thickness to the
circumference of the shaft with a portion projecting beyond into the keyway of
the wheel, so that on turning the wheels until the keyways therein are opposite, the
key J, can, on sliding the collar K, be moved from one wheel to the other, thus
keying and thereby operatively gearing either wheel H. or H³ with the compound
wheel to drive the spindle G at the desired speed.
When the wheels H. and H on the spindle G. are arranged as shown by Fig. 3, I
cut a key groove in the said spindle, and in each wheel H. and HI' secure a key; or
in lieu of this arrangement a feather key may be secured in the spindle and the wheels
made to slide thereon, which are coupled by double bell crank levers L. and L¹
mounted and connected together in such a manner that on operating the same in the
manner as hereinafter described, the wheels H. and H' are moved simultaneously, one
into gear with the compound wheel and the other out.
A groove is formed in each wheel H. and H' in each of which is placed a collar C..
having pins or trunnions projecting therefrom engaging with slotted openings in the
forked ends of each lever L. and I, the opposite end of each lever having a slot hole.
through which a pin passes, the pin being secured to a disc M. at some distance from
the centre thereof, so that on the disc being rotated by the handle N, the levers are
actuated on their fulcrums P. and P¹ thereby moving the wheels H. and H¹ in or out
of gear with the compound wheel.
The wheels H. and H' may be operated by being coupled together as shown by
Fig. 8 according to which arrangement a right hand thread is cut on the boss of one
of the wheels, and a left hand thread on the boss of the other wheel, the two bosses.
being coupled by a sleeve R. having similar threads; so that on turning the said
sleeve, the wheels H. and H¹ are moved, one into gear with the teeth of the compound.

page_text: 1
wheel, and the other out; the sleeve R. being retained in its position on the drill
'spindle G. by the pins S. S. passing through the sleeve into a groove cut in the said
'spindle.
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
1. The combination of the compound wheel with the wheels H. and H¹ severally put
into operative gear by a sliding key J. arranged substantially in the manner as shewn
and described.
i. 2. The combination of the compound wheel and wheels H and H¹ with the levers L.
and Larranged substantially in the manner and for the purpose hereinbefore set
1.
forth.
3. The combination of the compound wheel and wheels H. and H¹ with the sleeve R
arranged substantially in the manner and for the purpose set forth.
4. The combination of a drill frame consisting of a drill head detachable from a
standard, arranged so as to be used as a breast drill, or mounted on a standard
carrying a table made to slide vertically to give the cutting feed to the drills, with a
driving wheel having more than one rim of teeth, the said wheel working in con-
junction with the wheels H and H on the spindle G. and which are brought into
operative gear by aid of a sliding key J, or by the levers L and I or by the
sleeve R. all being severally arranged substantially in the manner as hereinbefore
described.
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