Improvements in Expanding Cutters or Tool Bars.
Year: 1899

page_text: Date of Application, 8th Dec., 1899-
Complete Specification Left, 8th Sept., 1900-Accepted, 13th Oct., 1900
Date of Application, our Day 20
Complete Specification Left, 8th Sept., 1900-Accepted, 13th Oct., 1900
Improvements in Expanding Cutters or Tool Bars.
I, CHARLES EDWARD HAYTON, of Gladstone Terrace, Dean Church Lane,
Daubhill, Bolton, in the County of Lancaster, Engineer, do hereby declare the
nature of this invention to be as follows:-
This invention relates to improvements in expanding cutters or tool bars for
use in the various mechanical operations of boring, turning and the like, the
object being to construct a simple bar in which the cutting tool or tools can be
readily expanded or contracted as required for the work in hand.
In carrying out my invention I take a bar of any shape that can be readily
fixed in a drilling, boring, turning or like machine and make in one end a hole for
a short distance up. In this hole place a small spindle having formed thereon
at one point, wheel teeth, the spindle being so arranged that it will remain in
the hole and yet be capable of being turned round by means of a square or the
like formed on its outer end or by means of a small milled bead formed on or
attached thereto. The bar, which generally carries two tools, has holes for these
drilled through it at right angles with its axis or at any suitable angle thereto.
These tools are formed at one side with teeth to engage with the teeth on the
small spindle so that as the latter is turned the tools may be expanded or con-
tracted and locked in any desired position by set screws or the like.
Where very fine adjustment of the tool is required the small spindle may have
a worm wheel formed at its outer end and the bar carry a small worm to engage
therewith. The worm wheel may be graduated with five divisions so that the
extent of the setting can be readily seen.
Again instead of the tools or tool being formed with teeth they may have a
plane surface and be fixed in small sleeves or tool boxes one side of each of which
has teeth formed on it to engage with the wheel teeth as before. Or the tools may
each have two holes formed on one side and a small rack having two pins on the
back be arranged to engage therewith.
Improvements in Expanding Cutters or Tool Bars.
I, CHARLES EDWARD HAYTON, of 23, Park View Road, Daubhill, Bolton, in
35 the County of Lancaster, Foreman, late of Gladstone Terrace, Dean Church Lane,
077

page_text: aforesaid, 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 expanding cutters or tool bars for
use in the various mechanical operations of boring, turning and the like, the
object being to construct a simple bar in which the cutting tool or tools can be
readily expanded or contracted as required for the work in hand.
The invention will be fully described with reference to the accompanying
drawings in which
Fig. 1 is a cross section of a tool bar constructed in accordance with my
invention,
Fig. 2 an end elevation of the bar
Fig. 3 a side elevation,
Fig. 4 a similar view to Fig. 1 showing a modified arrangement
Fig. 5 end elevation of one of the tools shown in Fig. 4 and
Figs. 6 and 7 end and side elevations respectively of a further modification.
Like parts in all these views are represented by the same reference letter.
In carrying out my invention and referring principally to Figs. 1 to 3 I take
a bar a of any shape, that can be readily fixed in a drilling, boring, turning or
like machine and make in one end a hole for a short distance up. In this hole
I place a small spindle c having formed thereon at one point, wheel teeth d, the
spindle being so arranged that it will remain in the hole and yet be capable of
being turned round by means of a square e or the like formed on its outer end or
by means of a small milled head formed on or attached thereto. To hold the
spindle in position longitudinally I use a small setscrew f passed through the
tool bar from one side and engaging with a groove formed in the spindle c.
bar which generally carries two cutting tools 9 has holes h for these drilled through
it at right angles with its axis or at any suitable angle thereto. These tools are
formed at one side with teeth i to engage with the teeth d on the small spindle c
so that as the latter is turned the tools may be expanded or contracted and locked
in any desired position by setscrews ; or the like.
The
Instead of forming the cutting tools g with rack teeth I sometimes use inde-
pendent racks k as shown in Fig. 4. These have formed on their backs cross
ridges engaging with corresponding grooves formed in the tools gor, instead of
ridges, pins may be used projecting into corresponding holes in the tools. This
method saves the expense of forming teeth in the tools.
Where very fine adjustment of the tool is required the small spindle e may
have a worm wheel m formed on or fixed to its outer end as shown in Figs. 6 and 7
and the bar be formed to carry a small worm spindle n to engage therewith. The
worm wheel may be graduated with fine divisions so that the extent of the setting
can be readily seen, or the end of the worm spindle n may be enlarged or carry
a disc o having engraved on its face the necessary graduations, and the position of
the setting may be seen by reference to a line p or pointer formed on or fixed to
the bar a. The spindle may be squared, or the disc o milled, to enable the
, setting to be readily carried out.
Again instead of the tools or tool being formed with teeth they may have a
plane surface and be fixed in small sleeves or tool boxes one side of each of which
has teeth formed on it to engage with the wheel teeth as before.
A tool bar constructed in any of the ways shown is an exceedingly simple,
handy, and cheap tool permitting of rapid and fine adjustment and enabling it
to be used for work where the ordinary type of cutter bar is not admissable.
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
1. An expanding cutter or tool bar consisting of a central bar, a pinion spindle

page_text: journalled therein and cutting tools carried thereby provided with teeth or
independent racks to engage with the pinion spindle substantially as described.
2. An expanding cutter or tool bar consisting of a central bar, a pinion spindle
journalled therein and carrying at its outer end a worm wheel (which may be
graduated on its face or not) a worm spindle engaging with the worm wheel and
cutting tools carried by the bar and provided with teeth or independent racks to
engage with the pinion spindle substantially as described.
3. An expanding cutter or tool bar constructed and arranged substantially as
described either with reference to Figs. 1 to 3; Fig. 4 or Figs. 6 and 7 of the
accompanying drawings.
Tata thin 5th day of Santambor 1000
WILLIAM H. TAYLOR,
Stephen's Buildings, 62, Market Street, Manchester,
Agent for the Applicant.