Improvements in Tool Holders of Lathes.
Year: 1892

page_text: Date of Application, 13th Dec., 1892
Complete Specification Left, 13th Sept., 1893-Accepted, 21st Oct., 1893
PROVISIONAL SPECIFICATION.
Improvements in Tool Holders of Lathes.
I, WILLIAM ASQUITH of Highroad Well Works, Halifax in the County of
York, Machine Tool Maker, do hereby declare the nature of this invention to be
as follows:
This invention relates to improvements in the holders for carrying tools for
cutting, chasing, or otherwise operating on metal in lathes, the object being to
provide a holder which will carry several tools, all of the several tools being
capable of simultaneous adjustment, or the several tools may have separate and
independent adjustment.
According to this invention I employ a circular disc or face plate carried in a
slide bed, and having a traverse motion imparted to it in the ordinary manner.
Through the centre of the face plate is a hole for the passage of the shaft or rod
to be "turned up" the tools are carried in radial slots grooves or recesses; formed
in the face plate are a series of tools. The cutting edges or points of the tools all
converge towards a common centre-the centre of the hole in face plate, and each
of the said tools can, by screw or other adjustment be regulated so as to approach
nearer to, or be moved further from the common centre and to the shaft or metal
which passes through the hole in the centre of the face plate.
The shaft whilst being turned is rotated in the ordinary manner, or in case of
heavy shafts, it may be advisable to revolve the face plate and the tools, the shaft
under operation remaining stationary. The disc or face plate when rotated may be
supported in a stationary concentric ring supported from the ordinary traversing
carriage, and such disc or face plate may be driven by gear or by strap and pulley
from an overhead driving pulley.
ל.
1
1000
WALTER BRIERLEY,
Penny Bank Chambers, Waterhouse Street, Halifax,
Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Tool Holders of Lathes.
I, WILLIAM ASQUITH of Highroad Well Works, Halifax in the County of
York, Machine Tool Maker, 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:-
This invention relates to improvements in the holders for carrying tools for
cutting, chasing, or otherwise operating on metal in lathes, the object being to
provide a holder which will carry several tools all of the several tools having
separate and independent means of adjustment.
According to this invention I employ a circular disc or face plate carried in a
slide bed, and having a traverse motion imparted to it in the ordinary manner.
Through the centre of the face plate is a hole for the passage of the shaft or rod
to be "turned up.'
"
The tool holders are adjustable in sliding bearings carried in grooves or recesses
formed in the face plate and their cutting edges or points all converge towards the
article under operation. Each of the said tools can, by screw or other adjustment
be regulated so as to approach nearer to or be moved further from the shaft

page_text: or metal under operation which passes through the hole in the centre of the face
plate.
The shaft whilst being turned is rotated in the ordinary manner, or in case of
heavy shafts, it may be advisable to revolve the face plate and the tools, the shaft
under operation remaining stationary. The disc or face plate when rotated may be
supported in a stationary concentric ring supported from the ordinary traversing
carriage, and such disc or face plate may be driven by gear.
Such being the nature and object of my said invention the following is a
complete description of same reference being had to the accompanying drawings
in which :-
Fig. 1 is a front or end elevation of the circular form of the improved tool
holder.
Fig. 2 is a side elevation of Fig. 1.
Fig. 3 is a front or end elevation of a modified form of tool holder.
Fig. 4 is a side elevation of Fig. 3.
Fig. 5 is a plan view of Figs. 3 and 4.
According to this invention and referring to Figs. 1 and 2 of the drawings I
employ a circular disc or face plate 1 carried in a slide bed 2 and having a traverse
motion imparted to it in the ordinary manner. Through the centre of the face
plate or disc 1 is a hole 3 for the passage of the shaft or rod 4 to be "turned up
or otherwise operated upon. The tool holders 5.5 are carried in radial slots,
grooves, or recesses 6. 6 formed in the face plate or disc 1.
"
The tools 7. 7 are carried in the tool holders 5. 5 in such a manner that their
cutting edges or points all converge towards a common centre, the centre of the
hole 3 in the face plate or disc 1, or towards the periphery of the shaft or rod 4
under operation. Each of the said tool holders 5 with their tools 7 can be
adjusted and set so that the cutting edges of the tools 7 are nearer to, or further
from the shaft or rod under operation, and this is done by means of the adjusting
screws 8, 8 having square ends 9. 9 on which to fix the lever of key.
The shaft 4 whilst being turned is rotated in the ordinary manner, or in the case
of heavy shafts it may be advisable to revolve the face plate or disc 1 and its
tools 7.7 whilst the shaft 4 remains stationary. The disc or face plate 1 when
rotated is supported in a stationary concentric ring 10 carried on the ordinary
traverse carriage or bed 2 and such disc or plate 1 may be driven by gear wheels
as shewn from any convenient going part or by other arrangement of gear.
Figs. 3, 4 and 5 shew the tools 7 carried in tool holders 6 having lateral or
horizontal means of adjustment and in this case where the tool holders and tools
cannot be revolved, it is obvious that the shaft 4 must always be rotated when
under operation.
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 :-
:-
A tool holder carrying a series of tools, the said holder being constructed for
the purpose herein described and substantially as illustrated by the annexed
drawings.
Dated this 12th day of Sentember 1802
WILLIAM ASQUITH,
By his Agent, Walter Brierley,
Penny Bank Chambers, Halifax.