Improvements in Furnace Mouth Rivet Hole Drilling Machines.
Year: 1893

page_text: Date of Application, 6th July, 1893
Complete Specification Left. 31st Mar., 1894-Accepted, 16th June, 1894
PROVISIONAL SPECIFICATION.
Improvements in Furnace Mouth Rivet Hole Drilling Machines.
JAMES HUNTER 101 Ferry Road Leith Foreman Engineer, do hereby
declare the nature of this invention to be as follows:-
As per drawing, the bracket A is fixed to end of boiler A' by an arrangement
of loose plates working in slot holes Z. Z. in the bracket A.
The outer plates B. B. are checked like the face of a file to make them grip, the
other plates C. C. have on them palls P. P. which rest in natches X X on bracket A,
also screws S. S. which when applied to plates B. B. on inside of furnace mouth
hold the bracket A secure.
On the bracket A, is the swivel bracket D which carries on it bevel pinions E, E, E,
and drill spindles F F also hand wheel G, with right and left handed screws R, L,
and nut, H. Also levers II on cover brackets J J, which when applied feed the
drill spindles F F out or in as wanted. Q, Q, are feathers for driving
spindles F. F.
The screws K K are for retaining bracket D. in position when it has been
shifted out, or in, or round about the furnace mouth to suit pitch of rivet holes.
There are graduations at M M on bracket A for the easy and speedy setting of
this bracket to centre of furnace mouth.
The machine can be driven by the hand with a handle on the fly wheel N, or by
belt pulleys OO or spindle T can be fixed to, and driven by an ordinary horizontal
or vertical drilling machine.
Dated this 5th day of July 1893.
JAMES HUNTER.
COMPLETE SPECIFICATION.
Improvements in Furnace Mouth Rivet Hole Drilling Machines.
JAMES HUNTER 101 Ferry Road North Leith, Scotland, Mechanical 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 :--
The bracket A is fixed to end of boiler A¹ by an arrangement of loose plates
working in slot holes Z. Z. in the bracket A.
The outer plates B. B. are checked like the face of a file to make them grip, the
other plates C. C. have on them palls P. P. which rest in natches X. X. on
bracket A., also screws S. S. which when applied to plates B. B. on inside of
furnace mouth hold the bracket A. secure.
On the bracket A is the swivel bracket D. which carries on it bevel pinions E. E. E.
and drill spindles F. F, also hand wheels G. G. with right and left handed
screws R. L. with nuts H. H. Also levers I. I. on cover brackets J J, which
when applied feed the drill spindles F. F. out or in as wanted.
The screws K. K. are for retaining bracket D. in position when it has been
shifted out or in, or round about the furnace mouth to suit pitch rivet holes.
There are graduations at M. M. on bracket A. for the easy and speedy setting of
this bracket to centre of furnace mouth.

page_text: The machine can be driven by hand with a handle on the fly wheel N or by
rope or belt pulleys O. O. or spindle T can be fixed too, and driven by an ordinary
horizontal or vertical drilling machine.
The self acting feed is first actuated by teeth being formed on bevel pinion E.
which gives motion to wheel V. The spindle V₁ has on it worm V2 which works
on to one of the hand wheels G which is likewise a worm wheel. G. and H. are
one casting, or may be made separate and keyed together, hence by moving round
wheel G, you give the like motion to nut H.
In order therefore to bring the other hand wheel and nut G and H. into motion
a hole is bored in the arms of the hand wheels G. G. and by putting a pin in the
hole in one of the arms of both wheels they then work in unison. In order to
disconnect the self acting feed, and have a hand feed, take off, or put out of gear
worm V'.
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,―
The arrangement and combination of the various parts, above mentioned, for
the purposes, and substantially as herein described, and set forth, and illustrated in
the drawings hereto annexed.