Improvements in or applicable to Drilling Machines.
Year: 1890

page_text: Date of Application, 12th Aug., 1890
Complete Specification Left, 12th May, 1891-Accepted, 13th June, 1891
PROVISIONAL SPECIFICATION.
Improvements in or applicable to Drilling Machines.
We, WILLIAM HORNSBY, of the firm of Richard Hornsby & Sons, Limited, of
Spittlegate Iron Works, Grantham, in the County of Lincoln, Engineer, and
CHARLES ROE also of Grantham aforesaid, in the employ of the said firm,
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements applicable to machines for drilling holes
in metal or other materials and adapted for fitting to any ordinary single spindle
drilling machine so as to convert the same into a multiple drilling machine. For
this purpose we employ a frame or drill-box in which are mounted two or more
spindles placed in a line or in any other direction. One of the spindles has a spur-
wheel mounted on it which gears with spur-wheels on the other spindles.
The
bottom ends of the spindles are made suitable for receiving drills. The upper end
of the first named spindle is extended through the frame or drill-box and is
attached, when in use, to the spindle of an ordinary drilling machine. Suitable
means such as guides are provided to prevent the drill-box or frame from turning
round, at the same time allowing it to slide up and down as the main spindle head
of the drilling machine feeds up or down. Sometimes, however, it is arranged that
the drill centres can be varied and, to do this, idle spur-wheels are placed in
between the main spur-wheel and the spur-wheel of the next drill to it, so that the
drill-spindles can be moved and the idle wheel follow up, and so on from the spur
wheel of that drill and idle wheel to that of the spur wheel on the spindle next to
it. These drills and drill-box complete are raised and lowered by the ordinary
action of the drill spindle in any ordinary drilling machine, and their turning
motion obtained from the revolving of the drilling machine spindle. A suitable
balance-weight is sometimes arranged to balance the weight of the drill-box and its
gearing and drills, and is made so as to move with the drill-box as it descends or
ascends.
Dated the 19th dane of tum 1900
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in or applicable to Drilling Machines.
We, WILLIAM HORNSBY, of the firm of Richard Hornsby & Sons, Limited, of
Spittlegate Iron Works, Grantham, in the County of Lincoln, Engineer, and
CHARLES ROE, also of Grantham aforesaid, in the employ of the said firm,
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 :—
For
This invention relates to improvements applicable to machines for drilling holes
in metal or other materials, and adapted for fitting to any ordinary single spindle
drilling machine so as to convert the same into a multiple drilling machine.
this purpose we employ a frame or drill box in which are mounted two or more
spindles for carrying drills. One of the spindles has a spur-wheel mounted on it
which gears with spur-wheels on the other spindles. The upper end of the first
named spindle is extended through the frame or drill-box and is attached, when in
use, to the spindle of an ordinary drilling machine. Suitable means such as guides
are provided to prevent the drill-box or frame from turning round, at the same time

page_text: allowing it to slide up and down as the main spindle head of the drilling machine
feeds up or down.
To enable our invention to be fully understood we will describe the same with
reference to the accompanying drawing, in which
Figures and 2 are an elevation and plan. of a drill-box having three drills
arranged according to our invention:
Figure 3 shews in side elevation the application of our invention to a drilling
machine.
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a is the drill-box or frame and b, b, bare the drill spindles mounted therein, the
central spindle being extended so that it can be introduced into the socket c of
the spindle of an ordinary drilling machine. d, d, d are the spur-wheels secured to
the said spindles and geared together so that all the spindles shall revolve simul-
taneously, and e, e are the guides for preventing the drill-box from turning round.
As shewn in Figures 1 and 2 these guides are secured to the drill-box in such a
manner that they will engage in openings in the table of the drilling machine, but
they may be arranged to slide in guides, upon the frame of the drilling machine,
as shewn in Figure 3, and in this case a lever hand weight i are employed to
balance the weight of the drill-box.
The operation of the apparatus hereinbefore described is as follows, that is to
say:
When the spindle of the drilling machine is revolved the central spindle 61
is also revolved and through the medium of the spur-wheels imparts motion to the
other spindles so that, when the spindle of the drilling machine is lowered all the
drills can be put simultaneously into work.
Sometimes we provide for varying the drill centres and to do this idle spur-
wheels are placed between the main spur-wheel and the spur-wheels of the next drill
to it, so that the drill-spindles can be moved and the idle wheel follow up, and so
on from the spur-wheel of that drill and idle wheel to that of the spur wheel on the
spindle next to it.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is:
1. The combination of a frame or drill-box having a number of drill spindles
geared together and one of which is adapted to fit the socket of an ordinary drilling
machine spindle, and of guides for preventing the said drill-box from rotating,
substantially as, and for the purpose, described.
2. An attachment for drilling machines constructed substantially as hereinbefore
described and illustrated in the accompanying drawing for the purpose specified.
Dated the 12th day of May 1891.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.