Improvements in Multiple Spindle Drilling Machines.
Year: 1891

page_text: Date of Application, 25th Nov., 1891-Accepted, 2nd Jan., 1892
COMPLETE SPECIFICATION.
Improvements in Multiple Spindle Drilling Machines.
We, WILHELM HABERSANG, and FRITZ ZINZEN, Manufacturers, of Düsseldorf,
Germany 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 accompanying drawings illustrate an improved drilling machine, having
more than one spindle, which is well adapted for drilling several holes simul-
taneously in such articles as pipe flanges, couplings, plates or other similar
articles.
Fig. 1 is a side elevation, Fig. 2 a front elevation, Fig. 3 a partial vertical
section, through the principal part of the machine, and Fig. 4 is a partial sectional
plan of an adjustable guide table by means of which the relative positions of the
spindles are regulated.
12
The machine as shown consists of three spindles which are provided with upper
and lower rolling toothed couplings & having a ball and socket joint to enable them
to be employed in a somewhat inclined position. The upper end of the spindles a.
are driven by gearing as shown, or by any other suitable driving device, and motion is
communicated through the rolling toothed couplings at the upper and lower ends
of the spindles a to the socket or lower ends of the same. As the spindles, in this
position, have to be subjected to a slight displacement they are made in two parts
an upper and a lower part which latter is moveable inside the tubular end of the
former and is depressed by a spring. The drills are arranged in the adjustable
guide table in such a way that they may be approached towards or removed from
the centre. This disc or table is provided with slots (Fig. 4) for the
accommodation of the guides of the drills. To enable all the drills to be approached
towards or removed from the centre simultaneously the toothed wheel is provided
and made to engage with three nuts formed as pinions which are rotatable on
screws 8. If one of the nuts be turned by means of a wrench the wheel is turned
and with it the other two nuts which simultaneously advance or withdraw guide
sockets to or from the centre, while either of the screws may be separately turned
to especially adjust its guide socket to a required point.
The simultaneous motion or adjustment of the three guide sockets might also
be obtained by employing spiral slots for the guides in the adjustable guide table h,
so that by turning the disc or table an equable movement of the drills inwards or
outwards would result as with the jaws of a self-centering chuck..
The machine may also be employed for drilling with a larger or smaller number
of drills. The same standard may also be used to support two or more drilling
appliances with a variable number of drills in each guide table. The raising of the
article which is being drilled may be performed in the manner hitherto in use, and
this is conveniently done by a lower table on which the work is secured. The
drills are held in suitable sockets of the spindles which pass through the socket
bearings of the guide table h. The machine may also be adapted for use
horizontally instead of vertically.
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. A multiple spindle drilling machine having spindles arranged with top and
bottom rolling toothed couplings & combined with a ball and socket joint, and
means for changing their relative positions, substantially as and for the purpose
herein shown and described.

page_text: 2. An adjustable guide table having two or more adjustable guide sockets for
drill spindles, working in slots i, combined with screws s, pinion nuts t, toothed
wheel and adapted for simultaneously and. equably changing the relative positions
of the guide sockets, substantially as and for the purpose herein shown and
described.
Dated this 25th day of November 1891.
FAIRFAX & WETTER,
433, Strand, London, Agents for the Applicants.