Improved Capstan Tool Holder for use in Machine Tools.
Year: 1897

page_text: Date of Application, 3rd Dec.,
1897
BAU
1000
PROVISIONAL SPECIFICATION.
Improved Capstan Tool Holder for use in Machine Tools.
We, GEORGE JEPSON, of Saxon Road, Heeley, Sheffield, in the County of York,
Foreman Mechanic, and JOIN BHINKLEY MARSHALL, of Livingstone Road, Heeley,
Sheffield aforesaid, Works Manager, do hereby declare the nature of this inven-
tion to be as follows:-
The invention relutes to an appliance to be added or applied to an ordinary
lathe (or other machine tool) to render it capable of performing work similar to
that of a capston lathe.
It consists essentially of a chuck or tool holder to be applied to the loose head-
stock constructed with a foundation or faceplate to be attached to the end of the
barrel of the headstock and a revolving plate cylinder or block forming a tool
holder pivoted thereto and provided with a number of tools tool holders or sockets
so that when in use any desired one of the tools may be brought into the line of
the lathe centres.
In carrying out the invention a foundation plate or block is constructed with a
Bocket or its equivalent preferably placed eccentrically to affix it to the barrel
of the loose headstock to be moved to and fro therewith. Also with a pivot stud
or its equivalent upon which a second plate cylinder or block can rotate.
This second plate is provided with a number of sockets tool holders or tools at
or near the edge into which any suitable form of boring cutting or other tool can
be fitted.
This plate is pivoted on the face of the foundation plate so that it can be
rotated to bring either of the tools into the centre line of the lathe centres so that
the required tool may be brought to operate on the work rotated and carried by
the fast headstock.
A catch or spring oatch or other device is applied to one of the plates to look the
tool holder in position when either of the tools is in position for work.
The appliance is moved forward to operete on the work by the screw of the loose
headstock which is moved forward by a hand wheel in the usual way.
Either of the tools in the tool holder may be rotated by a pulley or cord or the
like so as to operate on work held stationary or while it revolves.
The improved apperatus may, if desired, be attached to a face plate or to the
revolving spindle of the fast headstock in which case the tools when brought into
the line of the contres will rotate about their own axes and operate on work that
is stationary or fixed.
The apparatus is not limited in its application to lathes but may be adapted or
applied to screwing machines milling machines or other machine tools.
It may be applied to existing lathes or lathes may be built specially with the
appliance embodied.
Dad thin 1nt dose of Dasombor 1907

page_text: Improved Capstan 1001 Holder for use in machine 1001,
We, GEORGE JEPSON, of Suxon Road, Heeley, Sheffield, in the County of York,
Foreman Mechanic, and JOIN BRINKLEY MARSHALL, of Livingstone Road, Heeley,
Shellield aforesaid, Works Manager, 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; —
The invention relates to an appliance to be added or applied to an ordinary
lathe (or other machine tool) to render it capable of performing work similar to
that of a capstan lathe.
It consists essentially of a chuck or tool holder to be applied to the loose head-
stock constructed with a foundation or faceplate to be attached to the end of the
barrel of the headstock and a revolving plate cylinder or block forming a tool
holder pivoted thereto and provided with a number of tools tool holders or sockets
on the face so that when in use any desired one of the tools may be brought into
the line of the lathe centres.
It will be fully described with reference to the accompanying drawings.
Fig. 1. Side elevation of lathe and lathe headstocks showing our invention in
position as applied thereto.
Fig. 2. Front elevation of our improved capstan tool holder.
Fig. 3. Elevation of same from back with part of plate A broken away.
Fig. 4. Transverse section on line - Fig. 3.
Fig. 5. Side elevation showing detail of locking device.
A foundation or supporting plate or block A is constructed to fit on to or to be
attached to the barrel B of the loose headstock C of a lathe.
The plate or block A is preferably of annular or disc shape though it may be of
any other convenient form and is provided at one side with a socket D which fits
on to and is affixed to the sliding barrel B so that the block or plate A may move
to and fro therewith.
At the centre of the supporting plate or block A or in other convenient position
is fitted a pivot or stud E upon which a tool holder or chuck is supported and free to
rotate.
The tool holder is an annular or cylindrical block F provided with a number of
sockets G preferably in its face to hold a number of tools H projecting at right
angles to its face. The tools H may be of any desired form or shape for boring,
cutting, shaping or other operation on a rotating piece of work. The tools H
may be straight, bent or cranked as they may be intended to operate on the end,
side or face of the work, and cutting off may be effected by means of a cranked
tool pressed forward by rotating the holder F.
The holder plate or block F is pivoted on the stud E of the supporting block A
and the sockets G so placed that by rotating the holder block F, the tools II (or
either of them) may successively be brought into the centre line of the lathe
centres or in proximity thereto so that the required tool may be brought to operate
on the work rotated and carried by the fast headstock.
A spring catch or bolt L is fitted to the supporting plate A which engages with
notches in the back of the plate F to lock the tool holder in position when either
of the tools is in position for work. A pin M moving in a slot m may be employed
to prevent rotation of the bolt L and to hold it out of engagement with the
notches when desired.
The appliance is moved forward to operate on the work by the screw of the loose
headstock which is moved forward by a hand wheel or lever in the usual way.

page_text: Either of the tools in the tool holder may be rotated by a pulley or cord or the
like so as to operate on work held stationary or while it revolves.
The improved apparatus may, if desired, be attached to a face plate or to the
revolving spindle of the fast headstock in which case the tools when brought into
the line of the centres will rotate about their own axes and operate on work that is
stationary or fixed.
The apparatus is not limited in its application to lathes but may be adapted or
applied to screwing machines, milling machines or other machine tools with
revolving spindles or parts.
It may be applied to existing lathes or lathes may be built specially with the
appliance embodied.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is:-
1. A capstan 'tool holder for lathes and other machine tools comprising in its
construction a supporting plate provided with a socket to fit onto a loose headstock
barrel, a pivot or stud secured at right angles thereto on which a tool holder
revolves, and a tool holder revolving on said stud with a number of sockets to hold
tools projecting at right angles to the face of the holder and parallel to the axis
of the centres, substantially as described.
2. A capstan tool holder having the several parts constructed and arranged in
combination, substantially as described and shown.
n1 L lat dan of Contambor 1908
WM. P. THOMPSON & Co.,
Manchester, Liverpool, & London, Patent Agents.