Year: 1897

page_text: Date of Application, 14th Sept., 1897--Accepted, 16th Oct.,
1897
A communication from HENRY CLARK SERGEANT, of Westfield, County of Union,
State of New Jersey, United States of America, Engineer.
I, JAMES GRIEVE LORRAIN, M. Inst. EE., M. I. Mech. E., of Norfolk House,
Victoria Embankment, London W.C., in the County of Middlesex, Chartered
Patent Agent, do hereby declare the nature of this invention, (as communicated
to me from abroad) and in what manner the same is to be performed, to be par-
ticularly described and ascertained in and by the following statement:-
This invention is more especially designed for what are known as channeling
machines but is applicable to all machines for rock drilling, quarrying or chan-
neling in which the feed is effected by means of a screw which moves the drill
cylinder lengthwise within a guiding-back or shell. The object of the invention
is to afford convenient and effective provision for applying power to the feed screw
for the purpose of raising or drawing back the cylinder when it becomes necessary
to change the drill or bits which operation when performed by hand as is usual is
a very slow and laborious one; and to this end I combine with the feed screw a
motor arranged and made a fixture upon the drill-back or shell or any part of the
machine which carries and must move with the cylinder for the adjustment of the
machine to set the drill or bits to cut at various angles: and my invention consists
in the combinations hereinafter described and claimed and in which such a motor
is an element.
In the accompanying drawing Fig. 1 represents a side view of the cylinder of a
channeling or rock-drilling machine, the shell in which said cylinder slides length-
wise for the purpose of feeding the bits, and the mechanism for moving the cylinder
lengthwise which constitutes this invention, the shell being represented in section.
Fig. 2 is a front view of the shell and of the mechanism above mentioned.
Fig. 3 is a plan view of the shell, the cylinder and the aforesaid mechanism part
of which is shown in section.
Fig. 4 is a horizontal sectional view corresponding with a portion of Fig. 3 but
on a larger scale and showing the parts in different relation.
Similar letters of reference designate corresponding parts in all the figures.
A designates the drill-back or shell of which only a sufficient portion to illustrate my
invention is represented, and which may be supported in any suitable manner to
provide for the adjustment of the drill cylinder B at such angles or inclinations
as may be desirable according to the work to be performed. The cylinder B
is represented as fitted to slide ways a a on the shell in or on which it is capable
of being moved lengthwise in the usual manner by means of the screw Ċ the
upper part of which is fitted to turn but confined lengthwise in a bearing provided
for it in the head of the shell and the screw-thread of which works in a nut b
which is affixed to the cylinder. On the head of this screw is the usual worm
gear c which engages with an endless screw d' on a shaft d.
1) is a bracket which is secured by bolts e to the flange f on the back of the

page_text: It is repre-
shell A. This bracket contains or has upon it the bearings for the shaft d
of the endless screw and it also has arranged upon it the small special inde-
pendent motor E for operating the said screw. This motor may be of any suitable
kind, either a steam or compressed air engine or an electric motor.
sented as a three-cylinder steam engine of a well known kind having its base
plate bolted to the bracket D by bolts i. The shaft j of the said motor is repre-
sented as extended through bearings in the yoke which is secured to the body
of the motor and as carrying within the said yoke a spur gear k which gears with
and drives an intermediate spur gear which turns loosely on a fixed stud m
carried by a small standard on the bracket D and this spur gear 7 gears with
and drives the spur gear o which is fast on the screw shaft d. The said shaft d
is represented as having one end prolonged beyond one side of the shell A
as shown at din Fig. 3, for the attachment of a hand crank for turning the
screw by hand when it may not be desirable or convenient to use the motor.
In order to provide for disengaging the screw shaft d from the motor when the
screw is to be worked by hand and for re-engaging them for working by power,
the spur gear is made with a broader face than 7 and o, and the loose gear is
made capable of sliding lengthwise on the shaft to a position shown in Fig. 3 in
which it gears with both k and o for working the screw d by power or to a position
in which it leaves o free for turning the screw shaft by hand as shown in Fig. 4.
To secure the gear / in either of the above positions a spring-pressed locking pin q
is fitted, to the outwardly projecting hub of the said gear to enter one or other
of two circumferential grooves r 1 in the stud'm, the said pin having a conical or
bevilled point and the grooves being of corresponding form so that the atten-
dant by taking hold of a flange provided on the outer end of the hub may shift
..the gear from one to the other of the positions described, the pin q as he does so
being allowed, by the yielding of its spring, to pass out of one groove and being
caused by its spring to enter the other.
The motor employed in carrying out this invention when actuated by steam or
other motive pressure may have the said fluid supplied to it through a flexible
pipe from any suitable generator or reservoir, or when actuated by electricity will
be supplied through a flexible conductor.
The arrangement of the motor and the gearing through which it engages with
the gear on the feed screw all upon one bracket to be attached to the drill-back
or part of the machine upon which the drill cylinder moves lengthwise affords
great facility for applying my invention to existing machines.
It is only for the purpose of illustrating my invention in a way which may be
easily understood that I have represented the motor as arranged on the drill-back
or shell of an ordinary machine. It might be arranged on any part of a chan-
nelling or drilling machine which must move with the cylinder to set it and the
drill or bits at different angles or inclinations.
Having now particularly described and ascertained the nature of my said inven-
tion (as communicated to me from abroad) and in what manner the same is to
De performed, I declare that what I claim is
1. In a rock drilling or channelling machine, the combination with the drill 4
cylinder, the drill-back to which said cylinder is fitted to move lengthwise but
which otherwise moves only with the cylinder, and a screw arranged parallel with
the said cylinder for effecting said movement lengthwise, of a prime mover carried
by the drill-back or equivalent part to move therewith in all directions and geared
with the said screw for the purpose of applying thereto the power for raising or 5
drawing back the cylinder, the drill or bit stock and the drill or bits substantially
as herein described.
2. The combination with the drill cylinder, the drill-back on which the said
cylinder moves lengthwise, a screw arranged parallel with the cylinder but con-
fined lengthwise to the drill-back, a nut affixed to the cylinder and fitting said 5

page_text: screw and a shaft arranged upon the drill-back and geared with said screw for
operating it by hand, of a prime mover arranged on the drill-back or equivalent
part and gears between the said prime mover and said shaft one of which gears is
movable for disengaging the prime mover from said shaft to permit its use by
hand, substantially as herein described.
by of beptember
31.
J. G. LORRAIN, M. Inst., E.E., M.I. Mech. E., C.P.A.
Communicatee of said Henry Clark Sergeant.