Year: 1886

page_text: LEIGHTON MILLS of No. 1 South Preston in the Borough of Tynemouth County
of Northumberland, Principal district officer, Marine Department Board of Trade
do hereby declare the nature of this invention to be as follows:-
Holder for cutting tools for use in lathes or other machines. It consists of a
part called the stock to be held in place in the usual way in the lathe or machine,
made of rectangular or other suitable section, a hole is formed through it from end
to end and it may have a flange or collar at its end or ends; fitting into this hole
is a bar, of preferably round section, screwed and fitted with a nut, or nuts, at one
end and having a suitably formed head at the other; through this head is a hole
in which is inserted the cutting tool this hole is made at a suitable angle with the
axis of the bar; from the inside of the head is another hole parallel with the axis
of the bar and reaching to, and joining into the hole containing the cutting tool,
into this hole a bolt or slot is fitted such bolt is of sufficient length to press against
the cutting tool and project beyond the inside of the head of the bar. A modifi-
cation of this arrangement is that the bolt may pass into a hole in an independent
piece which itself passes through and projects beyond the outside of the head of
the bar, the cutting tool passing through a hole in such projecting part of the
independent piece at a suitable angle; the hole through the bar head may be
tapered or made with a shoulder and the independent piece made to fit.
In either modification suitable means may be used such as a screwed ring and
check out with a feather key in the bar to hold the head at a required angle whilst
the cutting tool is removed for sharpening or other purposes.
In either modification the action of screwing up the nut on the end of the bar
draws the head towards the end or flange of the stock, the ends of the bolt are
tbus pressed against the tool and the stock respectively with the result of securing
the cutting tool in any desired attainable position. The whole is to be made of
suitable material.

page_text: Holder for Cutting Tools for Use in Lathes and other Machines.
I, LEIGHTON MILLS, South Preston North Shields, in the County of Northumber-
land, Principal District Officer, Marine Department, Board of Trade do hereby
declare the nature of my invention for HOLDERS FOR CUTTING TOOLS FOR USE IN
LATHES AND OTHER MACHINES and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following statement:-
Having reference to my provisional specification of the 22nd February 1886 and
to the description of my improvement in tool holders therein. And to clearly
ascertain of what such improvements consist I provide drawings herewith which
I explain as follows:
3 is the
Figures A. B. C. D. are sectional views of my invention in which 1 is the stock,
of suitable section, for fixing in the rest of the lathe or machine having a hole
throughout its length. 2 is a bar fitting into the hole through the stock.
head formed solid, as in figures C and D, with the bar, or, attached by a joint as
in figure A or, by a screw as in figure B. 4 is the cutting tool fitting into a
suitably formed hole through the head. 5. 5 are slots or bolts which pass through
slotways or holes, also formed in the head, one end of such slots or bolts press
against the cutting tool and the other end against the end of the stock. These
slots or bolts may be either of circular, flat, or other suitable cross section. In
figure A, B, and C they are of a circular and, at figure B the slot there shewn is of
a Hat section. 6 is a nut for drawing up the bar and is common to the several
modifications of the improved tool holder. 7. 71 figure A, are a pair of check
nuts screwed on end of bar one of which holds a key, 72 taking into the bar, these
may be fitted when it is desired to keep the bar bead at a certain angle whilst
allowing the bar to be slackened for adjusting the cutting tool in other ways, or a
set screw and ring as at figure, B 73, or, other suitable and similar device may be
used for this purpose.
Figure C and D are modified forms of the head, the former is self explanatory,
in the latter a ring, 8, is provided fitting over a cylindrical flange on the stock, and
is movable with the bar and head, the cylindrical surface of the flange may be
graduated to shew the angle at which the tool is held the slot passes through the
head and bears on the ring into which it is recessed.
In any of the modifications the action of screwing up the nut, 6, compresses
the slots or bolts between the stock and cutting tool thus securing the latter in
position.
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. In a tool holder, the use of the slots or pins in the tool holder bead sub-
stantially as herein described and shewn.
2. The combination of the stock, bar, head and slots or bolts, substantially as
herein described and shewn.

page_text: 3. The combination of the stock, bar, head, ring and slot, as in figure D, sub-
stantially as herein described and shewn.
4. The combination of the bar, stock and check nuts or set screw and ring with
feather key as at 71 and 78, figures A and B, substantially as herein described and
shewn.
5. The combination of the slots or bolts with any convenient arrangement of the
several before mentioned parts substantially as herein described & shewn.
Dated thin 17th da
La 1000
LEIGHTON MILLS.