IMPROVEMENTS IN MACHINERY FOR DRILLING FISH BOLT HOLES IN STEEL AND OTHER RAILS
Year: 1876

page_text: LETTERS PATENT to John Thomas Walton, of Leeds, in the County of York, for
the Invention of "IMPROVEMENTS IN MACHINERY FOR DRILLING FISH BOLT
HOLES IN STEEL AND OTHER RAILS."
Sealed the 22nd August 1876, and dated the 29th February 1876.
"
PROVISIONAL SPECIFICATION left by the said John Thomas Walton at the
Office of the Commissioners of Patents on the 29th February 1876.
IMPROVEMENTS IN
JOHN THOMAS WALTON, of Leeds, in the County of York.
MACHINERY FOR DRILLING FISH BOLT HOLES IN STEEL AND OTHER RAILS."
On a suitable bed I mount a bracket, on which is fitted, so as to slide freely, a
headstock. On the headstock is mounted vertically one or more spindles, these
being caused to revolve by some convenient motive power, the motion being trans-
mitted to the spindle or spindles by suitable bevel gearing. In order to give the
required elongated form to the fish bolt holes, I impart a horizontal reciprocating
motion to the headstock, this motion being obtained by means of a cam or its
equivalent.
For the purpose of holding the rails during the drilling operation I provide an
adjustable vice, which is carried on the herein-before mentioned bed. In order to
set the rail in the required position for drilling the holes I provide gauge pieces on
the vice.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by the
said John Thomas Walton in the Great Seal Patent Office on the 29th August
1876.
"IMPROVEMENTS IN
JOHN THOMAS WALTON, of Leeds, in the County of York.
MACHINERY FOR DRILLING FISH BOLT HOLES IN STEEL AND OTHER RAILS."
.
On a suitable bed I mount a bracket, on which is fitted, so as to slide freely, a
headstock. On the headstock is mounted vertically one or more spindles, these
being caused to revolve by some convenient motive power, the motion being trans-
mitted to the spindle or spindles by suitable bevel gearing. In order to give the
[Price 6d.]

page_text: required elongated form to the fish bolt hole I impart a horizontal reciprocating
motion to the headstock, this motion being obtained by means of a cam or its
equivalent.
For the purpose of holding the rails during the drilling operation I provide an
adjustable vice, which is carried on the herein-before mentioned bed. In order to
set the rail in the required position for drilling the holes I provide gauge pieces on
the vice.
And in order that my Invention may be more completely understood, reference is
given to the accompanying two Sheets of Drawings, and to the letters and marks
Sheet 1, Figure 1, represents a part section and front elevation, Figure 2 a part
.section and side elevation. Sheet 2, Figure 3, a part section and plan.
On a suitable bed a I mount a bracket b, on which is fitted, so as to slide freely,
a headstock c. On the headstock c is mounted vertically two spindles d and d, to
which a rotary motion is transmitted from the driving pulley through driving
shaft g, bevel wheels h and i, spindle d, thence through spur wheels J, intermediate
spur wheel K, spur wheel to spindle d¹. In order to provide for the difference
of the pitch of the holes required in the various iron or steel rails I make the
movable headstock c carrying the spindle d' adjustable by means of the screw d².
The movable headstock is carried in the slide as shewn. In order to give the
required elongated form to the fish bolt holes I impart a horizontal reciprocating
motion to the headstock c; this motion is obtained by means of a cam m, which is
caused to revolve, motion being conveyed thereto through gearing n, pulley o, from
the pulley on the driving shaft g. The required reciprocating motion is conveyed
to the headstock through a runner or roller q, mounted on a stud r, fixed to a
projecting arm 8 on the headstock. Other equivalent means may be employed for
imparting this motion. The end of each spindle d and d¹ is fitted with a split
cone clutch, as shewn, for the purpose of holding and adjusting each drill, so that in
case of breakage both drills can be readily fixed to the same level.
For the purpose of holding the rails during the drilling operation I provide an
adjustable vice t, which is carried on the herein-before mentioned bed a. The vice t
is adjustable within the slide u, and adjusted by means of the regulating screw v,
in order to suit the various thickness of the rails. In order to set the rail in the
required position for drilling I provide the gauge pieces w on the vice t, which may
be changed from one side of the vice to the other, as required, and held in position
by the screws x. The required feed for the drills is transmitted from the screw y
and bracket 2, and headstock c. The screwy works in the nut 1, the required
motion being obtained through worm wheel 2, worm 3, shaft 4, pulley 5 from
driving pulley 6 on driving shaft g. The worm wheel 2 may be thrown out of gear
at pleasure, being fitted so as to slide freely on the screw shaft y; this may be
done by an eccentric or other known means. The screw y may be worked by hand
when the worm wheel 2 is thrown out of gear by means of the hand wheel 7.
Having now described the nature of my said Invention, and shewn by Drawings
how the same may be carried in practice, I would have it understood that I do
not limit myself to the exact details or configuration of the various parts I have
explained and shewn, as the same may, of course, be varied or modified without in
any way departing from the nature of my Invention, but what I do claim and
desire to be secured to me by Letters Patent is-
First. A drilling machine constructed with one or more revolving drill spindles
mounted in an adjustable headstock, and receiving reciprocating motion for drilling
fish bolt holes in rails, all operating substantially as set forth.
Second. The various modes and means for adjusting and regulating the parts of
the machine herein set forth.

page_text: Third. The combination of one or more drill spindles in a machine constructed
substantially as set forth, and a vice for holding the rail, and arranged in or on the
inachine itself.
In witness whereof, I, the said John Thomas Walton, have hereunto set my
hand and seal, this Twenty-fifth day of August, in the year of our Lord
One thousand eight hundred and seventy-six.
JNO. T. WALTON. (L.S.)