A Multiple Drilling Machine for Constructional Ironwork.
Year: 1889

page_text: "ate of Application, 23rd July, 1889
Complete Specification Left, 23rd May, 1890-Accepted, 28th June, 1090
PROVISIONAL SPECIFICATION.
A Multiple Drilling Machine for Constructional Ironwork.
RICHARD WILSON 39 Wilson Street Derby Engineer JAMES JENNINGS ROBINS
27 North Street Derby, Engineer do hereby declare the nature of this invention to be
as follows:-
A Multiple Drilling Machine for Constructional Ironwork," the special novelty of
which is, a series of spindles driven by spur gearing, acted upon by endless chain
bands.
The machine is applicable for drilling holes in multiple through any irregular or
straight work in iron steel or other metal.
RICHARD WILSON.
JAS. J. ROBINS.
COMPLETE SPECIFICATION.
A Multiple Drilling Machine for Constructional Ironwork.
We RICHARD WILSON, 39 Wilson Street, Derby, Engineer, and JAMES JENNINGS
ROBINS, 27 North Street, Derby, Engineer, do hereby declare the nature of this
invention and in what manner the same is to be performed, to he particularly
described and ascertained in and by the following statement :-
This invention relates to a Lovel arrangement of multiple drilling machine suitable
for drilling rows of holes in constructional ironwork with accuracy and dispatch.
In the accompanying Drawings we have shown our invention as arranged for
drilling a series of holes at one operation horizontally through opposite sides of an
arched iron flooring plate for bridges; two machines each with a row of drills being
set side by side to effect this operation. It will however be obvious that the
machinery is applicable wherever a series of holes in constructional ironwork is
required to be drilled at once.
Fig. 1 is a side elevation of one of these machines.
Fig. 2 is a partial plan view of two drilling machines arranged to work simul-
taneously on an arched flooring plate placed between them; and
Fig. 3 is a cross section of the upper part of one of the machines, on an enlarged
scale, and taken in the line 1. 2 of Fig. 1.
As the two machines are identical in construction, and may be used singly or
together, according to the work in hand, it will only be necessary to describe the
construction and mode of working of one machine. A is the bed plate supported on
suitable standards rising from a concrete floor. This bed plate carries a head
stock B B, which is free to slide transversely of the bed plate under the action of a
set of traversing screws CC, which fit into nuts set in the back of the head stock,
and are carried by brackets bolted onto the bed plate A. In the head stock B, a row
of sleeve shafts D is mounted to receive the drill spindles D', which are fitted with
drills d, and are connected with their respective sleeve shafts by a binding screw d'.
The sleeve shafts D are divided for convenience into groups, and keyed to each sleeve
shaft is a spur wheel D². These spur wheels gear into each other respectively for the
purpose of transmitting rotary motion to their group of sleeve shafts.
Into one of the spur wheels D² of each group (of which three are indicated in the
drawings), gears a spur wheel E, carried by a transverse shaft. E', which has its
bearings in the head stock, and is retained in a fixed position by passing through a
fixed bracket hearing bolted to the bed plate, and carrying a retaining collar e. The
spur wheel E is formed with a key-way to fit a feather on its shaft E, and it is
.

page_text: embraced by the headstock to ensure its travelling therewith during the traverse
motions of the head stock. E2 is a chain wheel keyed to the shaft E, and gearing
into it is an endless chain E³ leading up from a chain wheel F, loose on a transverse
spindle F, carried (for the purpose of tension adjustment) in segment slots formed in
blocks bedded on the concrete floor.
The arrangement of the chain wheels F is clearly shown at Figs. 4 and 5 ;
Fig. 4 being a plan view on an enlarged scale of a group of gearing for driving
2 sets of drills, and
Fig. 5 a side view of the same.
Each chain wheel is cast with a spur wheel F, and into these wheels gears a
central spur wheel F3 keyed to a shaft F4. This shaft is fitted with a mitre wheel F³,
which gears
into a mitre wheel F on a longitudinal shaft F7, which transmits motion
to the machine from the driving shaft F8.
It will now be understood that the chains from the chain wheels F lead off in
opposite directions up to their respective chain wheels E on the shafts E'.
Each group of drill spindles is driven independently through its own chain and
chain wheels. The drill spindles are adjusted in their sleeve shafts by the means
shown in the detached view Fig. 6, and in section at Fig. 3.
In rear of each drill spindle, is an arm D³ pivotted to the head stock, and fitted to
catch over a stud projecting from the headstock when dropped into a horizontal
position.
Fitted to about the middle of this arm, is an adjusting screw d, which is designed
to bear against the rear end of the drill spindle, and advance it to the required
position. This adjusting screw is fitted with nuts situate on opposite sides of the
arm D. When therefore its position is determined, the nuts are screwed up to
maintain the screw in its adjusted position.
Suppose it to be desired to withdraw a drill from the machine, it will only be
necessary to lift the corresponding arm D³ out of line with the spindle, and slackon
the binding screw d', when the drill spindle can be readily withdrawn, whether for
the replacement of a fresh drill, or to provide for other contingencies.
When the work is in position and the drill spindles are properly adjusted, they are
fed up to the work by hand, the traversing screws C being simultaneously turned by
means of worm wheels and worms actuated by a longitudinal shaft C, which is fitted
with hand wheels, and turns in bracket bearings on the bed plate A (see Figs. 1
and 2).
This shaft may however receive its motion from the shaft F7, by the driving gear
shewn detached in side view at Figs. 7, and in front view at Fig. 8.
F' is a drum keyed onto the shaft F7, and round it passes an open and a cross belt
to the driving pullies CC. Keyed to the shaft C₁ between these fixed pullies, is a
loose pulley C, which provides for the shifting of the open and cross belts to and
from their respective pullies, for the purpose of reversing the direction of rotation of
the worm shaft C₁, and thereby feeding forward the drills, and returning them to
their starting position.
Having now particularly described and ascertained the nature of the said Inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
The arrangement of multiple drilling machine above described, in which the drill
spindles are mounted in a traversing head stock, and provision is made for the
independent endway adjustment therein of the drill spindles, and the facile withdrawal
of the spindles from the machine.
D
30
CM 1800
NEWTON & SON,
Agents for the Applicants.