Improvements in Lathes.
Year: 1889

page_text: Date of Application, 16th Oct., 1889
Complete Specification Left. 16th Aug., 1890-Accepted, 27th Sept., 1890
PROVISIONAL SPECIFICATION.
Improvements in Lathes.
I JOHN KEMP STARLEY of the Meteor Works Coventry in the County of Warwick
Velocipede Manufacturer do hereby declare the nature of this invention to be as
follows:-
The object of my invention is to provide an open head or centre lathe by means of
which the work to be operated upon can be approached by the tool from either side
without the necessity of removing the said work and also to ensure greater steadiness
in the running of the head or lathe.
Instead of using the ordinary head having a bearing at each end of the cone I
arrange a suitable bracket within which are mounted two collars of
any
desirable
radius and capable of adjustment by means of a screw or other device and forming a
circular bearing when bolted together.
The inner surface of these collars is grooved or recessed to form with a similar
groove or recess on the inner collar hereafter described a race to receive balls or
rollers.
Within these outer collars and embraced thereby I provide an inner circular collar
baving on its outer periphery a groove or recess corresponding to that before described
on the outer collars, to receive balls or rollers and I prefer to form the three collars of
hardened steel or similar metal.
The inner face of the circular collar is so formed and screwed as- to be capable of
receiving the workholder or face plate which also carries the centre and the pulley or
other driving apparatus.
When found necessary to use powerful gearing for driving I may substitute a worm
and worm wheel for the pulley or other apparatus the worm wheel screwing into the
collar in place thereof.
This 16th dox of October 1889
POPPLEWELL & Co.,
17 & 18, Southampton Buildings, London, W.C., Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Lathes.
I JOHN KEMP STARLEY of the Meteor Works Coventry in the County of Warwick
Velocipede Manufacturer, 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 object of my invention is to provide an open head or centre lathe by means of
which the work to be operated upon can be approached by the tool from either side
without the necessity of removing the said work and also to ensure greater steadiness
in the running of the head or lathe..
Referring to the accompanying drawings and to the figures and letters of reference
marked thereon,
Figure 1 is a section and
Figure 2 an elevation of my improved open head or centre lathe.
Instead of using the ordinary head having a bearing at each end of the cone I
arrange a suitable bracket A within which are mounted two collars B (of any
desirable radius and capable of adjustment by means of a screw H or other device and
forming a circular bearing when bolted together.
The inner surface of these collars is grooved or recessed as at a to form with a
similar groove or recess on the inner collar hereafter described, a race to receive balls
or rollers D.

page_text: Within these outer collars and embraced thereby I provide an inner circular
collar E having on its outer periphery a groove or recess b corresponding to that before
described on the outer collars B. C.
I prefer to form the three collars of hardened steel or similar metal.
The inner face of the circular collar E is so formed and screwed as to be capable of
receiving the work holder G, or a face plate (capable of carrying a centre) and the
pulley Jor other driving apparatus.
When found necessary to use powerful gearing for driving I may substitute a worm
and worm wheel for the pulley and other apparatus, the worm wheel screwing into the
collar in place of the pulley J.
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:
In open headed or centre lathes such as herein described the use of a bracket such
as A surrounding and embracing collars such as B. C, said collars being provided with
a groove such as a, an inner collar E carrying a groove b corresponding or opposite
to a said grooves forming a race to receive balls or rollers such as D, the inner collar
being thus capable of revolving and is also adapted to receive a workholder or face
plate G, as and for the purposes herein described and illustrated by the accompanying
drawings.
Dattu ULLAN
POPPLEWELL & Co.,
17 & 18, Southampton Buildings, London, W.C., Agents for the Applicant.