Improvements in Lathes for Turning or Screwing Purposes.
Year: 1897

page_text: Date of Application, 30th July, 1897
Complete Specification Left, 2nd May, 1898-Accepted, 30th July, 1898
PROVISIONAL SPECIFICATION.
Improvements in Lathes for Turning or Screwing Purposes.
I, WALTER WASDELL TRICKETT, of 42, Staniforth Street, Birmingham, in the
County of Warwick, Machinist, do hereby declare the nature of this invention
to be as follows:
My invention has for its object "Improvements in lathes for turning or screwing
purposes" by which means I ensure greater perfection and truth in the work,
with less skilled labour, and at the same time render the rapid manipulation of the
machine more easy to accomplish than hitherto thus saving time and producing a
better class of work.
"
In carrying my invention into effect I provide two headstocks at the top and
bottom of the lathe bed, and having a centre line common to both, each of them
< the driver" carries the
being provided with travelling spindles of which one
pulleys which are keyed to same, so as to give the spindle a revolving motion and
poppet
at the same time allow a free longitudinal movement. The other or
headstock" carries at the end facing the driving headstock a spindle which
terminates in a centre or cone point, which rigidly supports that end of the work
centrally and at the other or rear end is provided with a screw spindle which is
tapped into the end of the main spindle. The outer end of the driving spindle is
provided with two fixed collars; which carry between them a loose collar bearing
two radial arms and similar radial arms are fixed to the screw at the rear end of
the poppet spindle, the two sets of radial arms being connected together by longi-
tudinal rods in such a manner, that the longitudinal, reciprocating motion of the
driving spindle is conveyed to the poppet spindle and its front dead centre, the
said rods being so fixed as to allow of the adjustment of position between the driving
and poppet spindle. A hand wheel is provided on the poppet spindle so that by the
turning of the spindle the rear screw causes the front to travel until the cone
centre is in engagement with the work. The releasing being effected by a reverse
turn of the wheel the feed for the spindles may be effected by means of a revolving
screw in fixed nuts or by clutches at end of either spindles, by which the driving
spindle may be drawn or the poppet spindles pushed or by an independently
driven guide screw.
Another part of my invention refers to the mode of and means for releasing
or securing the work in the clamp jaws which are provided on the inner end of the
driving spindle to effect which I mount a support on the bed, to which, at the
required height, I attach one end of a lever by a universal joint the said lever
being provided with a roller stud which is formed to enter a circular recess pro-
vided around the collar attached to the levers of the clamp so that for changing the
work it is only necessary to insert the stud in the recess and by means of the lever,
unlock & relock the jaws after which the handle end of the lever is placed on a rest
provided for the purpose clear of the travel of the clamps, and thus the work can
be inserted and released without stopping the machine.
Dated this 29th day of July 1897.

page_text: Improvements in Lathes for Turning or Screwing Purposes.
I, WALTER WASDELL TRICKETT, of 42, Staniforth Street, Birmingham, in the
County of Warwick, Machinist, 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:-
My invention has for its object improvements in lathes for turning or screwing
purposes by which means I ensure greater perfection and truth in the working
with less skilled labour and at the same time render the rapid manipulation of the
machine of the of the machine more easy to accomplish than hitherto thus saving
time and producing a better class of work.
To effect this I provide two headstocks at the top and bottom of the lathe bed
and having a centre line common to both each of them being provided with
travelling spindles of which one the driver" carries the pullies which are keyed
to same so as to give the spindle a revolving motion and at the same time allow a
free longitudinal movement. The other or 'poppet headstock" carries at the
end facing the driving headstock a spindle which terminates in a centre or cone
point which rigidly supports that end of the work centrally and at the other or rear
end is provided with a screw spindle which is tapped into the end of the main
spindle The outer end of the driving spindle is provided with two fixed collars
which carry between them a loose collar bearing two radial arms and similar
radial arms are fixed to the screw at the rear end of the poppet spindle, the two
sets of radial arms being connected together by longitudinal rods in such a manner
that the longitudinal reciprocating motion of the driving spindle is conveyed to
the poppet spindle and its front dead centre the said rods being so fixed as to
allow of the adjustment of position between the driving and poppet spindle. A
hand wheel is provided on the poppet spindle so that by the turning of the spindle
the rear screw causes the front to travel until the cone centre is in engagement
with the work the releasing being effected by a reverse turn of the wheel.
The feed for the spindles may be effected by means of a
fixed nuts or by clutches at end of either spindles by which the driving spindle
revolving screw in
may be drawn or the poppet spindle pushed or by independently driven guide
screw.
Another part of my invention refers to the mode of and means for releasing
or securing the work in the clamp jaws which are provided on the inner end of the
driving spindle to effect which I mount a support on the bed to which at the
required height I attach one end of a lever by a universal joint the said lever
being provided with a roller stud which is formed to enter a circular recess pro-
vided around the collar attached to the levers of the clamp so that for changing the
work it is only necessary to insert the stud in the recess and by means of the lever
ummlock and relock the jaws after which the handle end of the lever is retained
clear of the machine or placed on a rest provided for the purpose, clear of the travel 4
of the clamps and thus the work can be inserted and released without stopping the
machine.
In order that my invention may be clearly understood and more easily carried
into practise I have appended hereunto two sheets of drawings upon which I have
fully illustrated the nature of my sad improvements.
Figure 1 is a longitudinal part elevation and part section of
Figure 2 is a plan of same.
Figure 3 is a cross elevation of operating tools on line 1—2.
Figure 4 is a similar elevation on line 3-4 of the alama
my
machine.
4

page_text: Figure 5 is a similar elevation on the line 5-6 of the radial arms.
Figure 6 is a similar elevation on the line 7-8 of the feed.
Figure 7 is a similar clevation on the line 9-10 through the stop.
In carrying my invention into effect I provide the two headstocks A and B
one at the top and one at the bottom of the bed and having a centre common to
both each of them being provided with travelling spindles D and D' of which D
the driver carries the pullies F which are keyed to same so as to give the spindle D
a revolving motion and at the same time allow a free longitudinal movement.
The poppet headstock B carries the spindle D' and terminates in the centre or
cone which rigidly supports the end of the work centrally the other or rear end
of the spindle D¹ being provided with the screw spindle which is tapped into
the end of the main spindle D¹
The outer end of the driving spindle is provided with fixed collars and d³
which carry between them the studs h upon the loose collar h2 which bears the
radial arms H and similar radial arms H are mounted on the screw at the rear
end of the poppet spindle the two sets of arms H and H¹ being connected together
by the longitudinal rods J by which means the longitudinal reciprocating motion of
the driving spindle D is conveyed to the poppet spindle D¹ and its front dead
centred the arms H being so mounted on the screw d³ as to allow the adjustment
of the relative positions of the driving spindle D and poppet spindle D¹.
The hand wheel K is connected to the spindle D' by a feather key so that by the
turning of the spindle the screw ³ causes the spindle to travel until the cone
centre is in engagement with the work the releasing being effected by a reverse
turn of the wheel.
The travel of the spindles may be effected in various ways as for instance by the
half nuts L mounted in the pivoted levers and operated by the turning of the
cam M, which may be carried out as hereafter described. For securing and
releasing the work in the clamp jaws N without stopping the machine the spindle D
is fitted with the centre and sleeve or collar 6 which is made to slide on the
said spindle and operated by the roller stud p' which is mounted on the hand
lever P. This hand lever is hinged by the double joint p³ to the support 23 which
is provided on the bed to receive it and in such a manner that the handle can be
moved horizontally or vertically. A spring p is provided to act on the nose 7³ of
the lever support so that when the handle is raised the stud p¹ is retained in a
position clear of the machine.
The connecting bar S is secured to the lever P in such a manner that the lower-
ing of the stud p¹ into action brings the stop S2 into position between the head and
radial arm H¹ and thus prevents the spindles from a longitudinal movement during
the action of opening the clamp jaws the raising of the hand lever P also raising
the step S2 clear of the bush of the radial arms H' and thus allowing the spindle
to travel.
The operating tools T may be mounted in the supporting levers & Figure 3 and
brought to their work W by the pivoted levers (2 this being effected by the raising
of the hand lever V which has a toggle connection with the levers 2 at V¹. This
hand lever V may also be made to operate the feed jaws L by means of the link
connection to the arm on the shaft X from which the movement is communi-
cated to the cam M Figure 6 by the arm link and arm m¹ by which means
the raising of the lever V simultaneously brings the tool T to the work and operates
the feed L.
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:

page_text: lever P substantially as and for the purpose herein set forth and shewn upon the
accompany drawings.
2nd. In machinery for turning and screwing purposes the travelling spindles D
and D combined and operated substantially as and for the purpose herein set forth
and shewn.
3rd. In machinery for turning or screwing purposes the lever P in combination
with the sliding collar operated and mounted substantially as and for the
purpose herein set forth and shewn.
LEWIS WM. GOOLE,.
Agent for Applicant, 5, Corporation Street, Birmingham.
LEWIS WM. GOOLE,.
Agent for Applicant, 5, Corporation Street, Birmingham.