Improvements relating to Small Lathes, Watchmakers' Turns, and the like.
Year: 1892

page_text: Date of Application, 9th July, 1892
Complete Specification Left, 10th Apr., 1893-Accepted, 27th May, 1893
PROVISIONAL SPECIFICATION.
Improvements relating to Small Lathes, Watchmakers' Turns, and
the like.
STUDLEY SQUIRE Watchmaker 39 Bolsover Street Great Portland Street
London Middlesex do hereby declare the nature of this invention to be as follows:-
My invention relates to improvements in runners for small lathes, watchmakers
turns, and the like.
The first part relates to means for adjusting the said working runners and
consists in an adjustable dovetail slide (which carries the working runners) held
between jaws formed in the main runner. The slide is adjusted by a screw, a lever
or by a rack and pinion, and is fixed, or rendered rigid, by clamping the jaws with
a screw or cam. A rapid screw adjustment of the dovetail slide may be obtained
by means of a right and left handed screw thread cut on the same screw, one of
the threads working in a fixed nut.
The second part relates to holders which grasp the working runner, and which
serve to keep the driving pulley in position by means of a dovetail grove engaging
a dovetail disc on the pulley. The holder is provided with screws adjustable
longitudinally to compensate for wear in the grove.
STUDLEY SQUIRE.
COMPLETE SPECIFICATION.
Improvements relating to Small Lathes, Watchmakers' Turns, and
the like.
I, STUDLEY SQUIRE of 39, Bolsover Street, Great Portland Street, London, in
the County of Middlesex, Watchmaker do hereby declare the nature of this inven-
tion 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 improvements in small lathes, watchmakers' turns, and
the like, and it has for its object to provide means whereby the working runner
may be readily adjusted as required in centreing the work in the lathe or turn so
as to obviate the necessity of bending or filing the runner in order to make the
said adjustment.
The invention comprises a master runner or head having dovetailed clamping
jaws in which a transverse dovetailed slide is adjustable in the vertical direction,
the said slide carrying the working runner upon which turns the pulley carrying
the work-driver, the pulley being retained in position on the runner by a holding
device which is clamped adjustably upon the runner, and engages with the pulley
in such manner as to permit its rotation, all as hereinafter more fully described
with reference to the accompanying drawings, forming part of this Specification,
wherein
Figure 1 is a front elevation of the complete runner and Figures 2 to 10 are
detail views of the various parts thereof, drawn to a larger scale, Figure 2 being a
plan of the master runner or head and Figure 3 a cross-section thereof (on line 1-1
Figure 2) Figure 4 a side elevation, partly in section, of the dovetailed slide with
the working runner secured therein. Figure 5 a cross-section and Figure 6 a
lower end view of the slide. Figure 7 an elevation of the slide adjusting screw.
Figure 8 shews rear end, edge, and front end views of the device for holding the
pulley on the working runner. Figure 9 shews rear end, edge, and front end
views of the pulley carrying the work-driver and Figure 10 shews side and end
views of the work-driver.

page_text: The same letters of reference indicate the same parts in all the figures.
A is the main runner or head terminating in a pair of jaws a a having undercut
bevelled faces forming a transverse dovetailed guide adapted to receive a transverse
slide bar B of corresponding dovetailed section, a longitudinal slot a' extending
from the dovetailed guide backwards along the head A to admit of the jaws a
springing slightly and to afford room for the rear end of the working runner C.
The jaws a may be tightened on slide B by a clamping screw a passing through
the one jaw and screwing into a projection a³ left on the inner face of the other
jaw for a purpose hereafter referred to. The slide B has a hole through it from
back to front to receive the working runner C which is longitudinally adjustable
therein and is secured by a binding screw c screwing into a threaded hole drilled
longitudinally in the slide B from the upper end thereof, until it meets the hole b.
The slide B is provided at the lower end with a rearwardly-directed forked arm 61
having a horizontal gap or slot 6* adapted to embrace the collar d of an adjusting
screw D, whilst the necks d d above and below said collar are received in the
notched members 63 of the fork. The adjusting screw D screws into a threaded
hole in the projection a³ of the dovetailed jaw of the head above referred to, so
that by turning screw D the slide B may be slid between the jaws so as to raise or
lower it in the head A in order to make the runner C correspond in height with
the bed or centre of any runner at the opposite end of the lathe or turn. E is the
device for holding the pulley F on the working runner C whilst permitting the
rotation of the pulley. This holder E fits friction tight on to the runner C, for
which purpose it has a central aperture and a slot e opening out therefrom to give
the holder flexibility to enable it to maintain an even grip on the runner C. This
holder E is provided with a pair of gibs or jaws e adapted to embrace a flange
or collar on the rear end of the pulley F, the collar f turning freely between
the pair of gibs which enter the neck between the flange f and the pulley F
and determine the position of the pulley upon the runner C. In order to take up
any slack of the collar in the gibs, one or two screws are provided in the
holder E which screw through it from the back and are advanced towards the face
of the collar as wear takes place. The pulley F is provided with the usual
grooves for the driving belt and the shank of the work-driver or crank G is
received in a hole drilled in the face of the pulley and secured by a set screw g.
The runner C may have male and female centres in its opposite ends, and all of
the parts may be made of steel except the milled heads of the screws c and D.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. In a small lathe or watchmakers' turn, the combination, with the head having
jaws forming a transverse guide, of the slide fitted to work adjustably therein,
the screw for adjusting the position of said slide in the jaws, and the working
runner secured adjustably in the slide, substantially as and for the purpose
specified.
2. The combination, with the working runner and the pulley, of the device for
holding the pulley on the runner whilst permitting its rotation, said holding device
fitting on the runner and engaging by gibs with a collar on the pulley, substantially
as specified.
3. The general combination and arrangement of the parts constituting the
improved runner adjustment, substantially as specified and illustrated in the
drawings.
Dated this 10th 20t A
L.
1000
By A. M. & Wm. Clark,
S. SQUIRE,
53, Chancery Lane, London, Chartered Patent Agents.