Improvements in Machines for Drilling or Cutting Metal, Wood, or the like.
Year: 1891

page_text: Date of Application, 24th Nov., 1391-Accepted. 9th Jan., 1892
.
COMPLETE SPECIFICATION.
[Communicated from abroad by ALANSON DANFORTH QUINT, of 8, Clinton
Street, Hartford, Connecticut, United States of America, Mechanical
Engineer.]
Improvements in Machines for Drilling or Cutting Metal, Wood, or
the like.
I, HENRY HARRIS LAKE of the firm of Haseltine, Lake & Co., Patent
Agents, 45 Southampton Buildings in the County of Middlesex, 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:—
My invention relates to the class of machine tools that are used for drilling or
cutting either metal or wood, but it is particularly adapted for use on drilling
machines.
The object of my invention is to provide a drilling machine that shall support in
operative relation to a common driving spindle a plural number of drill spindles
that may be thrown into or out of engagement with the main driving spindle at
will, so that the machine will have all of the advantages of a gang drill, although
but a single drill will be in use at any one time for the purpose of boring holes in
the work. To this end, my invention consists in the details of the several parts
making up the drilling machine as a whole and in the combination of such parts, as
more particularly hereinafter described and pointed out in the claims.
Referring to the drawings
Fig. 1 is a detail view in front elevation of the upper part of a drilling machine
embodying my invention.
Fig. 2 is a detail view in side elevation of the machine head with parts cut away
to show construction.
Fig. 3 is a detail view in side elevation of the top of the standard and of the
turret head.
Fig. 4 is a detail view in front elevation of the turret head plate.
Fig. 5 is a detail view in section of the turret head lock showing the bell crank
lever and end of the trip rod.
On
In the accompanying drawings the letter A denotes a column or standard of an
upright drill this part being of any convenient construction so far as shape and
height of the column and details of construction of the work holding table are
concerned, the latter being omitted as not directly pertaining to my invention.
the upper end of the column A is supported a frame B preferably cast to shape
and having bearings that support a shaft c, on which is borne a pulley d in
convenient position to be connected by a belt to the counter shaft or any other
suitable source of power, while the inner end of this shaft c is provided with a
bevel cog
wheel that is in mesh with bevel cog wheels that are supported on the
main driving shafts that extend within the turret head.
On a hub on the front of the frame a turret head D is rotarily supported and
this turret head has projecting radially from its periphery any desired number of
drill stocks E the axes of the several drills supported in the turret head all
preferably lying in a plane passed through the turret head at right angles to the
axis of the main driving spindles. The purpose of this construction is to enable
successive drills borne in the drill stocks to be brought into position so as to exactly
replace either of the preceding tools that has been used for boring or cutting, for
instance if a hole previously drilled is to be reamed out a reamer borne in either of
the other drill stocks may be brought into the precise axial position necessary to
enable a hole to be reamed through.

page_text: On suitable bearings 62 in the frame a hollow shaft F extends through the hub
and into a chamber in the turret head. On the rear end of this hollow shaft F
there is secured a bevel gear that is in mesh with the gear e', and on the front
end of this hollow shaft there is supported within the turret head a friction driving
wheel H located near the back of the chamber in the head.
A driving shaft G is likewise supported in the bearings and it extends through
the hollow shaft F and has secured near its support in the frame a bevel cog
wheel in mesh with cog wheel c¹ and on its front end is secured a frictional
'driving wheel H¹.
The result of this arrangement of the spindle driving shafts F, G is to cause the
friction driving wheels H, H' to rotate in opposite directions so that a cone shaped
pulley borne on the end of either of the drill spindles will be driven and rotated
whenever it is pressed into contact with the bevel surfaces of the two frictional
driving wheels.
The turret is mounted on the hub on the frame eccentric to the axis of the main
driving shaft so that the cone shaped heads on the respective driving spindles may
be by the rotation of the head thrown into and out of engagement with the driving
surfaces of the friction wheels H, H. These relative positions of the several
spindles when in position for use and when out of such position, are illustrated in
the sectional view in Fig. 2 of the drawings.
The turret head is held on the hub by means of pointed screws d' that take into
a groove d² formed in a ring set in a socket in the surface of the hub or in a
groove formed directly in such surface. The two main shafts F and G are held
against end wise play by lock nuts that fit threaded surfaces on the respective parts
on one side of the bearing and by the hub of the cog wheel resting against the
opposite side of the bearing as shown in Figs. 2 and 3 of the drawings. The
chamber in the turret head is closed by the cover plate I having a socket in which
a bearing block i is supported this having a stem that extends through the cover
and provided on the outer end with a nut that serves to hold this block against
lengthwise displacement although allowing it free rotation. A weight is
suspended from this stem and its office is to hold the eccentric bearing block
in the right position to support and guide the end of the driving spindle that rests
in a socket therein and it also relieves the hollow shaft from any friction or from
any work in acting as a support and bearing for the shaft and allows the turret
head to be freely revolved around the bearing shafts and the disk.
Each of the drill stocks that may be integral projections from the periphery of
the head as shown or separate fixtures therein contain a tubular sleeve & that forms
a bearing for each drill spindle 1, this sleeve fitting a threaded socket in the stock
being provided with a flanged head and a lock nut the latter being used to
determine the precise position of the drill spindle within the hub. A pair of
nuts is provided on the spindle for the purpose of determining the extent of play
or lengthwise motion of the spindle within the sleeve bearing, a shoulder back of
the cone shaped head on the spindle coming into contact with the nearer end of the
sleeve acting in connection with the ends to control the extent of play.
Each drill spindle is in proper position for work when it is brought into the
vertical position projecting downward from the head as shown in Fig. 1 of the
drawings and there is sufficient lengthwise play always provided to allow of but a
slight frictional contact between the driving surfaces on the friction wheel and the
surfaces of the cone on the drill spindle in order that the drill may be used for
light work and the degree of driving power brought upon the drill spindle may be
proportioned to the work required. If a greater degree of driving power is
required it is gained by simply raising the work and thus bringing a greater
pressure lengthwise upon the drill and the greater such pressure the closer will be
the contact between the bevel surfaces of the friction driving wheels and the surface
of the cone, making a very delicate automatic adjustment between the work required
and the power employed.
My invention has been herein illustrated and described in connection with an

page_text: a driving wheel with its surface arranged in operative relation to the main driving
wheels, all substantially as described.
4. In combination with a supporting standard, a frame mounted on said standard,
a main driving shaft mounted in bearings on the frame having a bevel gear wheel
and a driving pulley, a driving shaft mounted in bearings on the frame, a cog wheel
fast to the shaft and in mesh with the bevel cog on the main shaft, a friction driving
wheel secured to the other end of the tubular shaft, a driving shaft arranged and
supported within the tubular shaft and having a cog wheel in mesh with the wheel
on the driving shaft and also a friction driving wheel secured near the opposite end
of the shaft, a rotary turret head mounted on the frame and supporting a plural
number of tool spindles, the several tool spindles rotarily arranged on the turret
head and each having a tapered head adapted to be moved into frictional contact
with the friction driving wheels, and the turret locking device, all substantially as
described.
5. In combination with a supporting frame, a driving shaft mounted on said frame
and bearing a frictional driving wheel, a rotary turret head mounted eccentric to
the axis of the said driving shaft and supporting a plural number of drill spindles,
the drill spindles rotarily arranged in their respective stocks and having a limited
lengthwise play therein, and having on the inner end of each spindle a frictional
driving wheel in operative relation to the frictional driving wheels, all substantially
as described.
6. In combination with a supporting standard, the spindle driving shafts mounted
in bearings in the frame and having a common axis, the friction driving wheels
secured to the respective shafts and having beveled edges, a rotary turret head
mounted on the frame eccentric to the axis of said shafts, a bearing block supported
in a socket in the inner surface of the outer wall of the turret and having an
eccentric socket supporting the outer end of the inner driving shaft, the counter-
poise weight connected to the stem projecting from the bearing block through the
outer wall of the turret head, and the several drill spindles radially arranged in
the periphery of the turret head and having each on its inner end a bevel wheel
adapted to fit between the opposing edges of the two frictional driving wheels,
all substantially as described.
7. In combination with a supporting standard, the main driving shafts having a
common axis and supporting on their outer ends the friction driving wheels with
means for rotating said wheels in opposite directions, the rotary turret head, the
tool spindles supported in the turret head each with a head located between the
opposing surfaces of the driving wheels, all substantially as described.
8. In combination with a supporting standard, the main driving shafts having a
common axis and supporting on their outer ends the friction driving wheels, with
means substantially as described for turning said wheels in opposite directions, the
rotary turret head mounted eccentric to the driving shafts, the drill spindles sup-
ported in the turret head and each having a head arranged in operative relation to
the driving wheels, all substantially as described.
9. In combination with a supporting bed, frame or standard, the main driving
shafts that support the frictional driving wheels, the frictional driving wheels with
their driving surfaces arranged in opposition to each other, means for rotating said
wheels in opposite directions and a tool spindle having a driving head or wheel
with its surface arranged in operative relation to the main driving wheels, all sub-
stantially as described.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.

page_text: upright drill but it is evident that my invention is applicable to other forms of
cutting tools besides drills without requiring any material change in the parts.
In order to hold the turret head in proper position while one of the tools is being
used a lock N is employed and this comprises a spring bolt M arranged in a socket
in the front part of the frame and with one end projecting into a bolt socket n in the
turret head. A spring m is arranged in the bolt socket in such a manner as to
press the bolt normally towards the bolt socket and the outer end of the bolt has a
groove head m with which a pin borne on the upper end of the bell crank o is
engaged. This bell crank lever is mounted on the frame and has a connecting rod of
extending from the end of the bell crank to a lever or treadle by means of which
the bolt may be withdrawn so as to enable the turret head to be rotated until the
desired tool has been brought into position for use when the locking device
automatically secures the head against further rotation.
The double lock nuts used on the respective driving shafts enable the latter to be
adjusted lengthwise so that the respective friction wheels on said shafts may be
exactly adjusted with reference to the head of the respective drill spindles when
the latter are in operative position.
The main feature of my invention resides in the power to adjust and control the
force with which the drill spindle may be held and driven. The hold of the
driving wheels upon the wheel borne on the head of the spindle depends upon
the frictional grasp of the parts as distinguished from a contact such as is made
by interengaging teeth as of gear wheels. By this frictional grasp the surfaces of
the interengaging wheels can be so adjusted as to degree of contact as to cause the
grasp to be relaxed when work is being done by means of a tool held in the spindle
when the tool encounters any extra resistance such as would injure the tool.
In this regard as well as in the fact that the mechanism is noiseless and is adapted
to drive a spindle with great speed a material advantage over the prior devices is
gained.
In the following claims I have used the words a supporting standard as referring
to the thing that supports the operative parts and this phrase includes a supporting
part whether the same is a particular standard or column or is a bracket, frame or
bed, the main requisite being simply that it shall be that part which supports the
working parts of the machine.
By the term common axis 1 mean that the axes of the shafts are coextensive or
in line in prolongation of cach other.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed as communicated to me by my
foreign correspondent I declare that what I claim is :-
1. In combination with a supporting bed or standard, the main driving shafts
having a common axis and supporting on their outer ends frictional driving wheels,
the frictional driving wheels with beveled edges fast to the respective shafts, the
turret head mounted eccentric to the driving shafts, and the drill spindles supported
by the turret head and cach having a cone shaped head located in operative position
to the driving wheels, all substantially as described.
2. In combination with a supporting bed or standard, the main driving shafts
having a common axis and supporting on their outer ends the friction driving wheels,
the driving wheels with beveled edges arranged in opposition, the rotary turret
head mounted eccentric to the driving shafts, the rotarily arranged tool spindles
supported in stocks in the turret head, the several spindles each having a tapered
head arranged in operative relation between the opposing edges of the driving
wheels and also having a limited lengthwise movement in their supports, all substan-
tially as described.
3. In combination with a supporting bed or standard, a main driving shaft having
a friction driving wheel secured to it within the turret head, a rotary turret head
mounted eccentric to the driving spindle, the rotarily arranged tool spindle having