An Improvement in Portable Drills.
Year: 1889

page_text: Date of Application, 12th Nov., 1889
Complete Specification Left. 12th Sept.. 1890-Accepted. 1st Nov.. 1890
PROVISIONAL SPECIFICATION.
An Improvement in Portable Drills.
I JOHN WALKER NEWALL of 62 Ogden Street in the City of Manchester Engineer
do hereby declare the nature of this invention to be as follows:-
The first motion is communicated to the drill from the motive power by means of a
pair of bevel wheels or a straight wheel and pinion according as it is most convenient
to connect up at right angles to or parallel with the drill spindle.
The above named wheel has its boss hollow and the drill spindle runs through it;
one end of the boss is formed into a pinion. The drill spindle is driven by an internal
wheel with a hollow boss through which the spindle passes, and motion is com-
municated to this wheel from the pinion or the boss of the first motion wheel_by
means of two or more pinions which run loose on studs carried by a fixed frame. The
drill may be fed either by hand or automatically.
Dated this Eleventh day of November 1889.
COMPLETE SPECIFICATION.
An Improvement in Portable Drills.
I, JOHN WALKER NEWALL of 62 Ogden Street, in the City of Manchester,
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:―
This invention will bo best understood by reforence to the accompanying drawings
in which
Fig. 1 is a section of a portable drill constructed according to this invention.
Fig. 2 is a plan of the feed can thereof and
Fig. 3 is a plan of the other parts of the feeding mechanism.
The main parts of the drill are enclosed in a shell consisting of two parts 1 and 2
which are held together by bolts 33 only one of which is shown in Fig. 1. The part 1
is formed with a bearing 4 for supporting the inner end of the shaft 24 by which
motion is communicated to the drill. Around the outside of the bearing 4 is fitted a
tube 23 by which the drill may he held and the outer end of which forms an additional
bearing for the shaft 24 which at its outer end is enlarged so as to fit said tube and
beyond this the shaft 24 is provided with a screw 13 or other device by which it may
be conveniently coupled to a flexible shaft or other source of power. 22 is a ring or
band for strengthening the joint between 1 and 23. The tube 23 may be held in a
sleeve sliding on a pillar in the usual way.
11 is the bevil pinion secured by the nut 37 or equivalent means on the inner end
of the shaft 24 and 10 is the bevil wheel with which the said pinion gears. 28 is the
drill spindlo which rotates freely in the elongated boss of the wheel 10 which boss
externally is provided with teeth to form a pinion 21. With this pinion gears one or
more, but preferably three, intermediate pinions 12 only one of which is shown in
Fig. 1 and each of these intermediate pinions rotates loosely upon a pin or stud 5
which is secured in a frame 8 prevented from rotating by screws 36 only one of which
is shown in Fig. 1. 9 is the internally toothed wheel with which the intermediate
pinions 12 also gear and which is provided with an elongated boss 25 which rotates
freely within the surrounding part of 2. 39 is a key or feather secured in the boss 25
and engaging with the groove 26 in the drill spindle so that said spindle will always
rotate with the wheel 9 but may be moved longitudinally independently of the
wheel.

page_text: The upper elongated part of 1 forms a bearing for the upper end of the drill
spindle 28 and screwed feed spindle 27 both of which spindles are secured together so
as to prevent independent motion in an axial direction but so as to admit of the
spindle 28 rotating independently of 27 which partakes of no rotary motion. For
this purpose the lower end of 27 may be reduced and inserted into the recessed upper
end of 28 wherein it is retained by screws 35 screwed into a collar 16 working freely
in a groove in the reduced part of 27. Instead of this arrangement the end of 28
may be reduced and the end of 27 recessed for its reception. 18 are hardened thrust
pins inserted into the adjacent ends of 27 and 28.
The feed screw 27 is prevented from rotating by the koy 17 which engages with the
long key-way or groove 40 in the screw 27.
3 is a hand-wheel or nut which is capable of being rotated but not moving in an
axial direction in the upper part of 1 this being provided for by the screw 34 secured
in 1 engaging with the collar 15 fitting freely in a groove in the nut proper or boss
of the hand-wheel. The nut or boss of the hand-wheel 3 is internally screw-threaded
to engage with 27 and upon the outside of said boss towards its upper part is secured
(or it may form a part of the boss) a ratchet wheel or ring 32 Figs. 1 and 3. 7 is a
collar mounted loosely upon part of 1 and part of 3 and practically closing-in the
ratchet-wheel 32. This collar at one sido is provided with two lugs 47 between which
by the pin 29 is pivoted the pawl 31 which is pressed into engagement with 32 by
the plunger 30 and spring 38 also carried in a boss on the ring 7 as shown in Fig. 3.
41 is a pin secured in 29 so that the pawl 31 may be turned into or out of its
operating position in either of which positions it will be retained by the plunger 30
and spring 38 the back of the pawl 31 being specially shaped for this purpose. The
collar 7 is provided with two other lugs or projections 42 between which is received
the crank pin 14 which is carried on the upper end of a rocking shaft 6 the lower end
of which at the inside of the case 1, is provided with a crank arm carrying an anti-
friction roller 20 by which the rocking shaft 6 is adapted to transmit to the ring 7
and pawl 31 the motion derived from a cam 43 formed on or secured to the upper
part or side of the wheel 10. 19 is a spring secured at one end to the case 1 and at
the other end to the shaft 6 so as to always hold the roller 20 in contact with the
cam 43 and so as to turn the shaft 6 in the direction opposite to that in which it is
operated by the cam 43; it will be obvious however that the spring 19 may be
dispensed with if a grooved cam be employed.
When the before-described apparatus is in operation the drill spindle 28 receives its
rotary motion from the shaft 24 by means of the bevil pinion and wheel 11, 10
pinion 21 intermediate pinions 12 and internally toothed wheel 9 which as before
described is connected with the spindle 28 by the feathor 39. Each revolution of the
cam 43 causes the rocking shaft 6 to partially rotate the collar 7 and consequently tho
pawl 31 one two or more times according as the cam 43 is provided with one two or
more operating projections or faces that illustrated in the drawings having two such
projections or faces. This action will rotate the nut 3 on the screw 27 and cause the
drill to be pressed down to its work.
Instead of the horizontal shaft 24 and bevil pinion and wheel 11 and 10 the drill
may be driven by a vertical shaft and straight pinion which would gear with a
straight wheel taking the place of the wheel 10.
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. In a portable drilling machine the combination with the drill spindle of a
straight pinion and wheel or a bevil pinion and wheel such as 11 and 10 pinion 21
one or more intermediate pinions 12 and an internally toothed wheel such as 9
substantially as described and illustrated in the accompanying drawings.
2. In a portable drilling machine such as described in claim 1 the combination with
a bevil wheel such as 10 or a straight toothed equivalent thereof of a cam 43 rocking

page_text: shaft 6 collar 7 pawl 31 and ratchet-wheel or ring 32 substantially as described and
illustrated in the accompanying drawings.
3. The combination and arrangement of parts constituting the complete portable
drill substantially as described and illustrated in the accompanying drawings.
Dated this Eleventh day of September 1890.
JARA
JNO. W. NEWALL.
W. P. Thompson & Boult,
Agents for the Applicant.