Improved Construction of Combined Sensitive and Compound Drilling Machines.
Year: 1899

page_text: Date of Application, 28th Mar., 1899
Complete Specification Left. 28th Dec., 1899-Accepted, 3rd Mar., 1900
Frost
PROVISIONAL SPECIFICATION.
Improved Construction of Combined Sensitive and Compound Drilling
Machines.
I, ALFRED GEORGE MELHUISH, Manager to Messrs. Wm. Cook & Co., Engineers
Limited, of Gothic Works, Salamanca Street, Vauxhall Walk, London, Machinists,
Lathe and Tool Manufacturers, do hereby declare the nature of this invention
to be as follows:-
The object of my invention is to construct a drilling machine in which the
following advantages may be obtained. Hand lever feed. Treadle feed. Screw
or gear feed. Adjustment to determine depth of hole to be drilled. Variable
gear from a one speed pulley and by use of the same driving belt. Gearing for
compound action enclosed in one of the pullies which gearing can be put in action
without stopping the machine.
For the purpose of my invention I construct a hollow column or standard
carrying, preferably at its base, the fast and loose pullies and at its upper part,
extensions for carrying the drill spindle and its pulley and gear driving wheels.
In the hollow column or standard I arrange a rod in connection with a pivoted
foot plate or treadle at its lower end and with a pivoted hand lever at its upper
end.
The hand lever or foot pedal operates the drill spindle for up and down move-
ment.
Encircling the drill spindle casing and between the extensions of the column
is a three or more speed pulley, the largest part of which contains the compound
gear, operable by lever, for increasing the power of the drill.
The column also carries a pair of pullies adjustable as to position and the
belting runs from the one speed pulley over these pullies to the pulley encircling
the drill shaft and when it is desired to alter the speed of the drill, all that is
necessary is to re-adjust the pullies on the column and shift the belt on to the
desired surface of the drill pulley or to operate the lever controlling the com-
pound gear. The adjustment of the column pullies may be by screw, clamping
or other action or means.
The work table has an extension which encircles the column and is in connec-
tion with a balance weight arranged inside the column by cords or chains. This
table can be adjusted as to height by hand and fixed in position by a set screw
or other device and so allow of any size of work being drilled within the capacity
of the machine.
The work table may be plain or have a vice in connection therewith for
holding the work under operation and may moreover be adjustable by worm
and rack in the well known manner.
By this invention should the operator desire to have both hands free to
manipulate the work under operation the foot lever can be operated for lower-
ing and raising the drill.
In addition to the foregoing I may feed the drill into the work by means of

page_text: a wheel, the boss of which rests upon the top of the column and encircles the
upper end of the rod to which the hand lever and foot lever are attached at their
respective ends. This rod is screwed and the hand wheel acts as a nut upon it
and as this rod is prevented from turning it follows that if the hand wheel is
turned the rod is drawn up and the hand lever pushes the drill spindle down.
This hand wheel in addition to acting as a screw feed also can be used to deter-
mine the depth to which a hole is to be drilled in a piece of work by the hand
or foot lever feed, by limiting the distance to which the drill spindle returns
and consequently proportionately limits the depth to which the drill enters the
work.
For instance if the hand wheel be screwed close to the joint of the hand
lever and say the return movement of the rod equals four inches it follows that
the drill spindle vibrates through a distance of four inches and will drill a hole
four inches deep; if on the other hand the hand wheel be moved half way along
the screwed portion the hand lever can only return two inches and can then only
drill a hole two inches deep and so on proportionately to the position of the hand
wheel on the screw so that the return movement determines the downward feed
of the drill at the next stroke, the table being first adjusted to bring the work
close to the drill after the drill has been set to the required position.
In machines of larger type the hand wheel will be operated by a pinion and
shaft and a hand wheel brought close to the drill in which case a sleeve is used
to encircle the rod and may be divided off into inches to indicate exactly how
deep the hole will be drilled.
T
Improved Construction of Combined Sensitive and Compound Drilling
Machines.
I, ALFRED GEORGE MELHUISII, Manager to Messrs. Wm. Cook & Co., Engineers
Limited, of Gothic Works, Salamanca Street, Vauxhall Walk, London, Machinists,
Lathe and Tool Manufacturers, 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 construct a drilling machine in which the
following advantages may be obtained; Hand lever feed, treadle feed, screw or
gear feed, adjustment to determine depth of hole to be drilled, variable gear from
one speed pulley and by use of the same driving belt, gearing for compound
action enclosed in one of the pulleys, which gearing can be put in action without
stopping the machine.
For the purpose of my invention and as I show on the annexed drawings,
Figure 1 part sectional elevation, Figure 2 exterior elevation from reverse side,
Figure 3 elevation of head, Figure 4 detached view of the head enlarged for clear-
ness. I construct a hollow column or standard A. carrying preferably at its base
the fast and loose pulleys B, C, and at its upper part, extensions D, E, for
carrying the drill spindle I' and its pulley and gear driving wheels G.
In the hollow column or standard A I arrange a rod H in connection with a
pivotted foot plate or treadle I at its lower end and with a pivotted hand lever J
at its upper end.

page_text: The hand lever J or foot pedal I operates the drill spindle H for up and down
movement. Encircling the drill spindle casing K and between the exten-
sions D, E, of the column A is a three or more speed pulley L, the largest
part of which contains the compound gear operable by lever M for increasing
the power of the drill. The column A also carries a pair of pulleys N, N,
adjustable in the notches P as to position and the belting Q runs from the one
speed pulley over these pulleys to the pulley encircling the drill shaft and when
it is desired to alter the speed of the drill, all that is necessary is to re-adjust the
pulleys N, N, on the column A and shift the belt Q on to the desired surface
cf the drill pulley L or to operate the lever M controlling the compound gear
in G. The adjustment of the column pulleys is indicated by notches P in the
back plate but it may be by screw, by clamping, or other means.
The work table R has an extension S which encircles the column A and is in
connection with a balance weight T arranged inside the column by cords or
chains U, U. This table R can be adjusted as to height by hand and fixed in
position by a set screw V or other device and so allow of any size of work, being
drilled within the capacity of the machine.
The work table R may be plain or have a vice in connection therewith for
holding the work under operation and may moreover be adjustable by worm
and rack in the well known manner.
By this invention, should the operator desire to have both hands free to
manipulate the work under operation, the foot lever I can be operated for lower-
ing and raising the drill.
In addition to the foregoing I may feed the drill into the work by means of
a wheel X the boss of which rests upon the top of the column A and encircles
the upper end of the rod H to which the hand lever J and foot lever I are
attached to their respective ends. This rod H is screwed and the hand wheel X
acts as a nut upon it, and as this rod H is prevented from turning, it follows
that if the hand wheel is turned, the rod H is drawn up and the hand lever
pushes the drill spindle down.
This hand wheel in addition to acting as a screw feed also can be used to deter-
mine the depth to which a hole is to be drilled in a piece of work by the hand
or foot lever feed by limiting the distance to which the drill spindle F returns
and consequently proportionately limits the depth to which the drill enters the
work.
For instance, if the hand wheel be screwed close to the joint of the hand lever
and, say, the return movement of the rod equals four inches, it follows that the
drill spindle rotates through a distance of 4 inches and will drill a hole 4 inches
deep, if on the other hand, the hand wheel be moved half way along the screwed
portion the hand lever can only return 2 inches and can then only drill a hole
2 inches deep and so on proportionately to the position of the hand wheel on the
screw, so that the return movement, determines the downward feed of the drill
at the next stroke, the table R being first adjusted to bring the work close to
the drill after the drill has been set to the required position.
Machines of larger type, will be operated by a pinion and shaft Y, and a hand
wheel Z be brought close to the drill, in which case the hand lever J and foot
lever I can be dispensed with.
As shown at Figure 4 the head of the pedestal or column A may have an
internal sleeve a provided with a key or feather 6 engaging a keyway of the
wheel W, so that the rod H has a free up and down movement from the foot
pedal I, or by the hand lever J, the sleeve travelling therewith.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what
I claim is:-
1. The improved construction and arrangement of the operative parts of a com-

page_text: bined sensitive and compound drilling machine as shown on the annexed draw-
ings consisting of hand and foot motions adjustable from an internal rod for deter-
mining the descent of the drill spindle, as described.
2. In a combined sensitive and compound drilling machine, the internal rod H
connected by foot pedal I and by hand lever J, the rod H being screw threaded
and carrying a hand wheel X adjustable thereon for the purpose described.
3. In a combined sensitive and compound drilling machine the traveller
sleeve a on the threaded portion of rod H in combination with worm gear appli-
ances W, Y, operable by hand wheel Z, as described and substantially as shown.
The 28th day or December 1899.
H. GARDNER
Patent Agent, 166, Fleet Street, London,
Agent for the said Alfred George Melhuish.