Improvements in Machine Drills to be Worked by Manual or Steam Power.
Year: 1886

page_text: Date of Application, 18th Mar., 1886
Complete Left, 22nd Nov., 1886.
Complete Accepted, 18th Mar., 1887.
Improvements in Machine Drills to be Worked by Manual or
Steam Power.
I FREDERICK GREENAWAY of Slough in the County of Bucks Engineer do hereby
declare the nature of this invention to be as follows:-
The invention has for its object improvements in machine drills to be worked by
manual or steam power. The frame of the machine consists of a base and standard,
and from the standard an arm projects horizontally. At the outer end of the arm are
upper and lower bearings for the drill spindle which rotates in a vertical or inclined
position. The drill spindle passes through a sleeve in the lower bearing, and a
longitudinal groove in the spindle receives a pin or feather within the sleeve so that
the sleeve in rotating carries the spindle with it, whilst the spindle can still slide
through the sleeve. The sleeve has bevilled teeth upon it, and is driven by a corre-
sponding pinion on the shaft passing through the horizontal arm of the frame. In
order to feed the drill downwards toward the work at the same time that it is rotated
an automatic arrangement is used; the upper half of the drill spindle has a screw cut
upon and is received into a long sleeve which passes through the upper bearing
into a sleeve in the lower bearing. This long sleeve is drilled to within a short
distance of the top sufficiently large to admit the lower half of the drill spindle. The
remaining part of this sleeve screwed internally to correspond with screw thread
upon the drill spindle which passes through it. On this long sleeve between the
bearings is a collar which can slide up and down a short distance; it engages with
upper sleeve by means of a longitudinal slot and feather. The collar has two bevilled
pinions formed upon it and by means of a clutch fork it can be raised or lowered to
bring either one or the other of the pinions into gear with a corresponding pinion on
extremity of horizontal shaft.
•
When the lower pinion is driven the screw sleeve and the drill spindle rotate in the
same direction, the speeds however are not identical so that the drill spindle has a
slow end wise movement adapted to advance the drill when at work. When the collar
is lowered so that its upper pinion gears, the screw sleeve and the drill spindle rotate in
DO11

page_text: opposite directions, and the endwise movement of the drill spindle is then rapid, so
that without loss of time, the drill can be advanced to or withdrawn from its work.
The stem of the clutch fork enters a socket formed on the upper bearing of arm and
passes into a sleeve contained in the socket. The sleeve has a handle upon it and also
an incline which causes it to move endwise when turned. When the sleeve moves
endwise in the socket it carries the clutch fork with it and so the clutch fork is lifted;
a spring returns the clutch when it is set free.
At the outer extremity of the horizontal shaft is a spur pinion driven by the following
means a hand wheel is provided having two rings of teeth upon it, a ring of internal
within the periphery, and a ring of, external teeth round the boss. Either can be
made to gear with the pinion upon the horizontal shaft, the internal teeth upon the
upper side of the pinion, and the external on the lower side of the pinion. The ring
of internal being much larger in diameter than the ring of teeth around the boss, the
first mentioned imparts a fast motion to the drill spindle, and the latter a slow motion.
The change of one ring of teeth to the other is effected by lifting and lowering the
hand wheel, for this purpose the wheel is carried upon a stud axis fixed into a lever,
and this lever at one end is jointed to a lug upon the standard, whilst near its other
end it can be clamped to another lug by a set screw working in a slotted hole.
At the lower end of drill spindle the drill is received into a central hole in the
spindle and a holder secures it centrally in its place. The drill holder consists of a
cap and gripping pieces. The spindle near its lower end has a screw thread upon it,
and this receives the cap. The cap projects beyond the lower end of the spindle and
is coned within. The cap receives into it the gripping pieces which are three in
number and are tapered, they range around the spindle and engage with a neck upon
it immediately above its lower end. When the cap is screwed home its inclined inner
surface operating against the exterior surfaces of the gripping picces, which are
similarly tapered, forces the gripping pieces inwards towards the centre and makes
them nip both upon the neck of the drill spindle and also upon the stem of the drill.
The inclination of the drill is obtained by making the head to revolve on the
horizontal arm and to be fixed in position by a set screw, by which arrangement
the drill can be set to any point in the circle. For foot or steam power a groove is
turned in the hand wheel.
CARI MAEL & CO.,
Agents for the Applicant.

page_text: Steam Power.
FREDERICK GREENAWAY High Street Slough in the County of Buckinghamshire,
Ironmonger, 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 improvements in machine drills to be worked by
manual or steam power. The frame of the machine consists of a base and standard,
and from the standard an arm projects horizontally. At the outer end of the arm are
upper and lower bearings for the drill spindle A which rotates in a vertical or inclined
position. The drill spindle A passes through a sleeve D in the lower bearing, and a
longitudinal groove in the spindle receives a pin or feather L within the sleeve, so
that the sleeve in rotating carries the spindle with it, whilst the spindle can slide
through the sleeve. This sleeve has bevelled teeth upon it, and is driven by a corre-
sponding pinion E on the shaft J passing through the horizontal arm of the frame.
In order to feed the drill downwards towards the work at the same time that it is
rotated, an automatic arrangement is used. The upper half of the drill spindle A has
a screw cut upon it, and is received into a long sleeve B which passes through the
upper bearing into the sleeve in the lower bearing, this long sleeve is drilled to within
a short distance of the top sufficiently large to admit the lower half of the drill spindle.
The remaining part of this sleeve is screwed internally to correspond with screw
thread upon the drill spindle A which passes through it. On this long sleeve, between
the bearings is a collar C which can slide up and down a short distance, this collar
has two bevelled pinions formed upon it and it engages with upper sleeve by means
of a longitudinal slot and feather R. By means of the clutch fork H it can be raised
or lowered to bring either one or the other of the pinions into gear with a corre-
sponding pinion F on extremity of horizontal shaft J when the lower pinion is driven,
as shewn in drawing, the screw sleeve B and the drill spindle A rotate in the same
direction. The speeds however are not identical the wheel D driving drill spindle
gaining a slight advance each revolution so that the drill spindle A revolves faster
than sleeve B consequently the drill spindle is gradually lowered by screw in sleeve B
so that the drill spindle has a slow endwise movement adapted to advance the drill
when at work. When the collar C is lowered so that its upper pinion gears, the
screw sleeve B and the drill spindle A rotate in opposite directions and the endwise
movement of the drill spindle is then rapid so that without loss of time the drill can
be advanced to or withdrawn from its work. The stem of the clutch fork H enters a
socket formed on the upper bearing of arm and passes into a sleeve I contained in
the socket, this sleeve has a handle upon it and also an incline, which causes it to
move end wise when turned, by incline working on pin K, when this sleeve moves
endwise in the socket it carries the clutch fork H with it and so the clutch fork is

page_text: lifted. A spring returns the clutch when it is set free. At the other extremity of
the horizontal shaft is a spur pinion M driven by the following means. A hand
wheel N is provided having two rings of teeth upon it, a ring of internal within the
periphery and a ring of external teeth round the boss. Either can be made to gear
with the pinion M upon the horizontal shaft J, the internal teeth on the upper side of
the pinion and the external on the lower side of the pinion. The ring of internal
being much larger in diameter than the ring of teeth around the boss, the first
mentioned imparts a fast motion to the drill spindle and the latter a slow motion.
The change of one ring of teeth to the other is effected by lifting and lowering the
hand wheel N for this purpose the wheel is carried upon a stud axis fixed into a
lever P, and this lever at one end is jointed to a lug upon the standard, whilst near
its other end it can be clamped to another lug by a set screw working in a slotted
hole to adjust it to either fast or slow speed. The machine is fitted with an adjustable
four jaw chuck. The drill spindle being split or sawn at right angles for a short
distance at the lower end, drilled to receive the drill, coned and screwed outside, and
clamped by a nut with a corresponding internal cone.
Hand feed Machine. This is similar in design to the self feeding one, but it is
arranged for feeding by hand by the following means.
The drill spindle A passes
through a sleeve B in lower bearings, with a key or feather and longitudinal slot so
that it can slide up and down whilst being rotated, the upper half of drill spindle
passes through a sleeve D in upper bearing which has a screw thread cut upon it
engaging with bearing E, at the top of sleeve is a hand wheel F which upon being
turned raises or lowers the drill, the alteration to slow or fast speed is the same as
self-feeding machine. For foot or steam power a groove is turned in hand wheel.
Having now particularly described and ascertained the nature of my said Invention,
and in what manner the same is to be performed, I declare that what I claim is :-
1. "That the machine is injenious in movement and design."
2. "That it will meet a want long felt by the trade for Drilling purposes.