A Telescopic Double or Single Drilling Apparatus for Fire Boxes and the like.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
A Telescopic Double or Single Drilling Apparatus for Fire Boxes and
the like.
1, ERNEST AVERAY, 23, Salthouse Road, Barrow-in-Furness, Lancashire, Boiler
Inspector, do hereby declare the nature of this invention to be as follows:
This invention relates to drilling fireboxes & the like, the object being to drill,
if necessary, with either or both ends of the drill.
In carrying out this invention I have arranged the working parts as follows.
A and B are drill holders with small holes to fasten drill or point & are con-
nected to C & D by means of small rivets. C and D) are tubes C can be
lengthened to suit. E, is a round bar with thread one end working in C & D.
F is a pin that goes through C & E to regulate distances required. G is a slot
through D to act as a slide for E. H is a pin that works in G.
works on E to put pressure on A
I is a nut that
maintain a pressure on A & B.
B. Jis a spring which is forced by I to
for I. L is a centre point to be placed in A or B when only one drill is required.
K is a washer attached to J to form a surface
M is a ratchet fastened to E to work the whole thing.
Dated this 21st day of July 1899.
A Telescopic Double or Single Drilling Apparatus for Fire Boxes and
the like.
I, ERNEST AVERAY, of 23, Salthouse Road, Barrow-in-Furness, in the County of
Lancaster, Boiler Inspector, 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 apparatus chiefly designed for drilling the stays of fire
boxes but also applicable for drilling holes in other objects, the invention having
for its object to adapt such apparatus for simultaneously drilling two holes oppo-
site each other as in locomotive fire boxes or for drilling only one hole at a time
as_required.
In the accompanying drawing,-
Figure 1 is a longitudinal elevation of the apparatus partly in section;
Figure 2 is a transverse section on the line M, N, Figure 1; and
Figure 3 is an elevation of a loose centre intended for use when drilling with
only one end of the apparatus.
n.

page_text: A is a round bar forming the spindle of the apparatus, such bar being screw
threaded to receive an adjusting or feed nut B. Near one end of the spindle A
is a stud or pin C which moves longitudinally in a slot K made in a sleeve D
fitting over the said end. In the middle of the spindle A is fitted a ratchet and
handle for separating the apparatus. The opposite end of the spindle A
receives a sleeve F which can be slid or adjusted on the spindle A to any required
length, it being then secured in position by means of a bolt or the like passed
through holes L, L in the said spindle and sleeve.
A socket G is fixed in the outer end of each of the sleeves D and F by means
of a pin 0, the said sockets being adapted to receive the drills H, H, Figure 1,
if two holes are to be drilled simultaneously or a drill H and the loose centre,
Figure 3, if only one hole is to be drilled at a time.
In order to regulate the pressure or feed I provide a spiral spring I loose on
the spindle A between a collar P on the sleeve D and a loose collar J abutting.
against the feed nut B thereby causing a constant and uniform pressure on the
cutting points, which pressure can be varied by turning the feed nut B. As will
be readily understood the apparatus is reversible thereby affording the user great
convenience in manipulating the apparatus.
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. Drilling apparatus adapted to drill two oppositely placed holes simul-
taneously, or a single hole and comprising a spring telescopic drilling bar and
means, such as those described, for adjusting the length and the degree of pres-
sure, substantially as set forth.
2. In a drilling apparatus the combination with a drilling spindle and ratchet
device for rotating the same, of an adjustable fixed drill carrying sleeve and a
sliding drill carrying sleeve a spring for producing pressure on the drills and a
nut working over a screw thread on the spindle for adjusting such pressure, sub-
stantially as herein before described and illustrated in the accompanying drawing.
3. The combination of parts forming the improved telescopie double or single
drilling apparatus, hereinbefore described and illustrated in the accompanying
drawing.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.