Improvements in Attachments for Drilling Machines.
Year: 1894

page_text: PROVISIONAL SPECIFICATION.
Improvements in Attachments for Drilling Machines.
THOMAS WOOF 56 Mall Road Hammersmith London, W. Engineer do hereby
declare the nature of this invention to be as follows:-
An addition to drilling machines of any type, for the purpose of drilling two or
more holes at any required centres.
For this purpose I arrange a portable head, which can be fixed to any drilling
machine and which is driven by the ordinary drilling machine spindle, on this head
is a spur pinion working into similar pinions fixed to the actual drill spindle which
works in a circular guide can be adjusted to any centres relative with each other by
simply slackening one nut on each spindle and when tightened up they are
automatically fixed, so that the drilled holes are parallel with each other.
Dated this Second day of April 1894.
THOMAS WOOF.
THOMAS WOOF, 56 Mall Road, Hammersmith, London, W., 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:-
My invention consists of an attachment which can be fixed to any drilling
machine of any type, for the purpose of drilling, tapping or rhymering two or more
holes at the same time, either in a line or in a circle.
For this purpose I arrange a portable head which may be fitted with any number
of independent spindles, and all are driven from a central spindle which is attached
to the ordinary spindle of a drilling machine. Upon this central spindle is a spur
wheel which engages with spur wheels on each of the independent drill spindles.
The pitch of these drill spindles may be varied as desired, the spindle bearings in
the portable head being adjustable for this purpose.
In order that my invention may be understood and carried into practical effect,
I have caused to be annexed to this Specification the accompanying drawings and
now refer to the figures and letters of reference thereon indicated.
Fig. 1 is a sectional elevation.
Fig. 2 is a plan, the upper half being in section.
A is the spindle which is attached to the box which in an ordinary drilling
machine holds the drill, keyed or otherwise fixed to this spindle is a spur wheel B
which engages with two or more pinions C C fixed to spindles D. D., the lower ends
of the spindles D. D. forming the boxes E. E. which hold the drills.
These spindles D. D are free to move to any position in the radial slots F. F. and
can be fixed in their desired positions by the nuts G. G.
The whole is contained in a metal box in which is a recess H that slides on a
projection fixed to the framing of the drilling machine for the purpose of a guide.
DO17

page_text: The bottom plate of this box has radial slots F. F. in which slide the lower
bearings I of the drill spindles. The top plate has similar slots in which slide the
upper bearings J of the drill spindles. K is a cap fixed to the upper bearing J and
carries an adjustment screw L.
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. The combination of one central spindle with any number of independant
spindles arranged radially round it and geared to it, these spindles being suitable
for attaching drills, taps, and rhymers to, and capable of being set in any desired
position relative to one another.
2. The portable head which can be attached to any drilling machine substantially
as described and illustrated by the accompanying drawings.
Dated this 1st day of December 1894.
THOMAS WOOF.