Improvements in Lathes used for Making Cocks and like articles.
Year: 1891

page_text: Date of Application, 16th May, 1891
Complete Specification Left, 15th Feb., 1892-Accepted, 26th Mar., 1892
PROVISIONAL SPECIFICATION.
Improvements in Lathes used for Making Cocks and like articles.
I, WILLIAM FORD SMITH, of Gresley Iron Works, Salford, in the County of
Lancaster, Engineer and Director of the firm of Smith & Coventry Limited, do
hereby declare the nature of the said invention to be as follows:-
The improvements in lathes for making cocks, consist of two headstocks upon
one bed.
One headstock is for operating upon the casing for the cone plug of the cock,
the other headstock has a loose or forcing headstock as well and is for operating
upon the cone plug for the cock.
There is a separate tool carriage for both the casing and the plug of the cock
and these carriages are arranged so that they can both slide in a line across, as
well as in the lengthway of the bed, and have other ordinary adjustments, and
there are arrangements for giving selfacting movements to the carriages in the
directions required.
Behind the bed there is a beam lever upon a vertical axis carried on a projection
from the bed and this lever is long enough to come opposite each tool carriage.
This beam lever has slideways formed upon each end of it for two slides, one of
which is attached so as to swivel to cach cross carriage and the inclination of the
beam lever in relation to the lengthway of the bed or axis of the headstock spindles
is adjustable by a screw.
With this arrangement the cone of the plug of the cock in one headstock and
the hole or internal cone of the casing in the other headstock can be simultaneously
turned and to the same cone or inclination so that one will fit into the other.
The cutting tool for the internal turning operating on the back (the opposite
side to that for ordinary turning) and that for the plug on the front of the lathe.
The lathe will perform other turning, required for cocks and like articles besides
the internal and external cone turning.
Dated this Fifteenth day of May 1891.
PETER J. LIVSEY,
Agent.
COMPLETE SPECIFICATION.
Improvements in Lathes used for Making Cocks and like articles.
I, WILLIAM FORD SMITH, of Gresley Iron Works, Salford, in the County of
Lancaster, Engineer and Director of the firm of Smith & Coventry Limited,
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 improvements in lathes for making cocks, consists of two headstocks upon
one bed.
One headstock is for operating upon the casing for the cone plug of the cock, the
other headstock has a loose or forcing headstock as well and is for operating upon
the cone plug for the cock.
There is a separate tool carriage for both the casing and the plug of the cock and
these carriages are arranged so that they can both slide in a line across, as well as
in the lengthway of the bed, and have other ordinary adjustments, and there are
arrangements for giving selfacting movements to the carriages in the directions
required

page_text: Behind the bed there is a beam lever upon a vertical axis carried on al
projection from the bed and this lever is long enough to come opposite each tool
carriage.
This beam lever has slideways formed upon each end of it for two slides, one of
which is attached, so as to swivel, to each cross carriage and the inclination of the
beam lever in relation to the lengthway of the bed or axis of the headstock spindle
is adjustable by a screw.
With this arrangement the cone of the plug of the cock in one leadstock and the
hole or internal cone of the casing in the other headstock can be simultaneously
turned and to the same cone or inclination so that one will fit into the other.
The cutting tool for the internal turning operating on the back (the opposite
side to that for ordinary turning) and that for the plug on the front of the lathe.
The lathe will, perform other turning required for cocks and like articles besides
the internal and external cone turning.
Fig. 1 is a front elevation of a lathe for turning the cone plugs and boring or
turning the casings of cocks and like articles, also applicable for other purposes.
Fig. 2 is a plan of the same, and
Fig. 3 is an end view of the driving headstocks showing a brake lever.
a is the bed constructed and arranged and standing upon feet, same as in ordinary
lathes.
At the left hand there is an ordinary headstock b, with a face plate for holding
the casing of the cock (when operating upon such articles) and on the right hand
there is an ordinary headstock e with an ordinary loose or following headstock c,
on the extreme right of Fig. 1, but which latter is omitted in Fig. 2, this head-
stock c, is for turning the cone plug of the cock or like article when held between
the centre in the rotating, spindle headstock e and that in the following or loose
headstock c¹.
There is a carriage d for each headstock bande arranged to slide upon the bed a
in an ordinary manner, and each carriage d has slideways at a right angle to the
lengthway of the bed a for a cross slide which has slideways upon it in the
lengthway of the cross slide d', for another slide, which carries the slide for
the tool rest which thus arranged can be adjusted to any required angle on the
slide d².
The back end of each slide d' has a vertical stand secured in it upon which a
slide d, can swivel that fits upon a slideways, one at one end and another at the
other end of a beam lever e, having its vertical fulerum e¹ on a bracket or arm from
the bed a.
This beam levere can be oscillated on its axis e¹ and when adjusted (which may
be effected by a screw at one end) is secured by bolts passing through it and
slots in two brackets or arms a¹ from the bed, one at or near each end of the
beam e..
When the beam levere is secured at the required angle it will be seen that the
slides will be controlled and that the cutting tools will be moved to and fro in a
direction across the lengthway of the lathe bed a as the carriage d is slided to and
fro in that direction.
The casing of the cock as before stated will be operated upon in the headstock b
and the cutter for the internal turning or boring will operate upon that side of the
conical hele to be formed which is furthest from the front of the lathe (which is the
opposite side to that for ordinary turning in lathes).the wide end of the cone hole
will be nearest the cutting tool and tool rest.
In operating upon the cone plug by the headstock c, the wide end of the cone is
placed in the reverse direction to that of the casing when being turned by the other
headstock b.
The cutting edges of the tools operating in connection with both headstocks b
and c, must be accurately adjusted to cut in a plane passing through the axis of
the lathe spindles or articles being operated upon. Thus suppose a horizontal plane
to pass through the axis of the headstock spindles and the articles being rotated
'

page_text: by them, then both cutters must be adjusted to cut in such plane ‘and not above
or below it.
Both cutters must cut at the same time relatively in the same plane. in. relation
to the axis of the headstock spindles.
The lathe may be used for ordinary work, as well as for "cone" work where
one external cone is to accurately fit another internal cone.
There is a back shaft in bearings in brackets or arms from the bed a.
from the bed a.
It is driven from the headstock spindle c from a pulley thereon, by a belt
working on the pulley on the shaft and by another belt working on speed
pulleys on f, and g on a front shaft. g in suitable bearings in brackets or arms
This shaft has a worm g² upon it which is in bearings so as not to move end ways.
in a projection from the slide carriage d for the headstock c and this worm is
connected with the shaft g by a key and key groove in the shaft g, and this worm g
gears with a worm wheel on a shaft in the slide carriage d for the headstock c
by which the carriage d is selfacted.
On this shaft there is an adjustable collar against which an arm from
the slide carriage d comes when it arrives at one extreme, this moves the shaft y
which spring
endways against the action of the helical spring on the shaft
comes between a collar on the shaft and its bearing at that end so that the shaft
is thus moved endways in its bearings and slides a short space through the hollow
axis for the pulleys g which rotate in bearings in the bracket or arm from the
bed a and the end of this hollow axis has one half of a ratchet or other faced
clutch which can gear with a corresponding half clutch secured to the shaft g and
thus when the shaft moves end ways the clutches are brought out of gear and the
feed is stopped and when the shaft is liberated, the spring g brings the clutches
again into gear.
There is a similar arrangement for the other headstock b, the shaft in front
being driven directly by a belt between pulleys, on the end of the headstock
spindle and pulleys on a hollow shaft in bearings on the bracket from the
bed a.
The ratchet or other clutch in this case is upon the outside end of the pulleys h',
that is one half of the clutch is secured to the outside end of the pulleys and the
other half of the clutch is attached to the outside end of the shaft h.
With this lathe internal and external cones (such as the casings and plugs of
cocks) can be turned to the same inclination so as to fit cach other."
In each headstock bande a lever kis mounted on a stud the end of the lever
has a piece of leather or other suitable material secured to it which when the handle
end of the lever is lifted depresses the other short end of the lever having the
leather secured to it against the interior of the adjoining pulley upon the headstock
spindle and thus acts as a brake to arrest the momentuin of the lathe spindle when
required.
When the handle k is at liberty its weight keeps the brake surface clear of the
pulley, the handle end of the lever then resting upon the base of the headstock.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is-
1. The combination of two lathe headstocks, two carriages sliding in the length-
way of the bed, one for each headstock, each slide carriage having a
cross slide
connected with guides on an adjustable beam lever, substantially as and for the
purpose hereinbefore described and illustrated by the drawings.
2. The combination and arrangement of lathes with two headstocks on one bed,
with carriage slides, an adjustable beam lever guide connected with the cross
slide (d), the arrangements for stopping the self acting movement of the slide
carriages (d) along the bed and the lever brakes (4) for arresting the momentum

page_text: of the rotary headstock mechanism substantially as hereinbefore described and
illustrated by the drawings.
Dated this Thirtoonth day of February 1892
PETER J. LIVSEY,
Agent.