AN IMPROVED SLOTTING MACHINE TOOL HOLDER AND LATHE BOX TOOL HOLDER
Year: 1881

page_text: LETTERS PATENT to William Timms, of 18, Swainson Street, West Hartlepool,
for an Invention of AN IMPROVED SLOTTING MACHINE TOOL HOLDER AND
LATHE BOX TOOL HOLDER."
PROVISIONAL SPECIFICATION left by the said William Timms at the Office
of the Commissioners of Patents on the 17th February 1881.
WILLIAM TIMMS, of 18, Swainson Street, West Hartlepool.
SLOTTING MACHINE TOOL HOLDER AND LATHE BOX TOOL HOLDER."
"AN IMPROVED
This Invention of an improved slotting machine tool holder and lathe box tool
holder relates to tool holders, whether used in the slotting or shaping machine or
used in the lathe or boring machine, and is intended to hold tools of any ordinary
section of steel, but preferably cutters made from square rod.
It is composed of a square outside bar by which it can be held in the slotting
machine or in the slide rest. This square bar or body is bored through its whole
length, and into this a turned spindle is fitted; a square hole (or according to
section of steel to be used) is made through and across the axis of the turned
spindle at nearly the end of it, the other end of the turned spindle is screwed and
is fitted with a collar that bears against the end of the bar or body, and also a nut;
the tool being placed in the slot, and the nut on the screw at the end of the
spindle tightened, the tool is firmly held; the body of the bar at the end may be
made slightly larger at the end, and the turned spindle at the end also enlarged
to correspond, and thus a good bearing surface provided against which the tool is
clamped by the nut and lock nut on the turned spindle. As the turned spindle
rotates in the bar or body the cutting tool can be set at any required angle.
In boring, the tool can be used to cut from both sides at once and thus work
very steadily.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said William Timms in the Great Seal Patent Office on the 17th August
1881.
WILLIAM TIMMS, of 18, Swainson Street, West Hartlepool.
SLOTTING MACHINE TOOL HOLDER AND LATHE TOOL HOLDER."
"AN IMPROVED
This Invention of an improved slotting machine tool holder and lathe tool
holder relates to tool holders when used in the slotting or shaping machine or used
in the lathe or boring machine, and is intended to hold tools of any ordinary
section of steel, but preferably cutters made from square rod.
It is composed of a square outside bar by which it can be held
the slotting
machine or in the slide rest. This square bar or body is bored through its whole
length, and into this a turned spindle is fitted; a square hole (or according to
section of steel to be used) is made through and across the axis of the turned
spindle at nearly the end of it, the other end of the turned spindle is screwed and
is fitted with a collar that bears against the end of the bar or body, and also a
nut; the tool being placed in the slot and the nut on the screw at the end of the
spindle tightened, the tool is firmly held; the body of the bar at the end may be
made slightly larger at the end, and the turned spindle at the end also enlarged to
correspond, and thus a good bearing surface is provided, against which the tool
is clamped by the nut and lock nut on the turned spindle. As the turned
spindle rotates in the bar or body the cutting tool can be set at any required
angle.
In boring, the tool can be used to cut from both sides at once and thus work
very steadily.
In the Drawings, Figures 1, 2, 3, 4, 5, 6, and 7 represent the tool holder with the
taper bar in the axial line of the bar, and Figures 8, 9, and 10, the tool holder with
the taper at right angles to the axial line of the bar.
Figure 1 is a view of the taper spindle a² with screwed end and nut in the
bar b, which is shewn in section; a, the head of the taper spindle slotted to receive
the tool x. Figure 2, view of the tool holder complete; b, the bar to be held in the
rest; a, the head of the taper spindle, which, with the tool x, is drawn tight up to
the shoulder of b by the nut and screw.
Figure 3, the taper spindle removed, showing head and shoulder a, collar a¹,
taper a², screwed end a³, and nut.
Figure 4 removed, shewing the boring for the taper spindle in dotted lines.
Figures 5, 6, and 7, another arrangement of the taper spindle with the head
split to hold the tool by a screw and nut, the taper itself being held as before.
Figures 8, 9, and 10, where the tool holder is made with the taper bar at right
angles to the axial line of the bar and the taper, as shewn at a², Figure 8, is of a
more obtuse angle or greater taper in a given length, the tool x being shown in the
three Figures.
The taper spindle in place of being held by a nut could be fixed by a wedge in
a slot across the end at the screwed end in place of the nut, or a slot could be made
about the centre of the taper bar and a nearly corresponding being made in the
hollow bar the wedge could be inserted there and so hold the tool instead of the
screw and nut.
Having now described and particularly set forth the nature of the said Invention
and the manner of carrying the same into effect, I would have it understood that
what I claim is,―
First. The tool holders, constructed substantially as described for the purposes
set forth.

page_text: Second. The taper bar for holding the tool set in another bar either axially
with it or at right angles to it, and holding the tool firmly by the means
substantially as described.
In witness whereof, I, the said William Timms, have hereunto set my hand
and seal, this Thirteenth day of August, in the year of our Lord One
thousand eight hundred and eighty one.
WILLIAM TIMMS. (L.S.)