IMPROVEMENTS IN LATHES AS REGARDS THE CHUCKS, TOOLS, AND IMPLEMENTS USED FOR SAME, SPECIALLY APPLICABLE TO SCREW CUTTING
Year: 1879

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LETTERS PATENT to Walter Rice Olivey, of Bury, in the County of Lancaster,
for the Invention of IMPROVEMENTS IN LATHES AS REGARDS THE CHUCKS,
TOOLS, AND IMPLEMENTS USED FOR SAME, SPECIALLY APPLICABLE TO SCREW
CUTTING."
Sealed the 4th April 1879, and dated the 28th January 1879.
PROVISIONAL SPECIFICATION left by the said Walter Rice Olivey at the
Office of the Commissioners of Patents on the 28th January 1879.
WALTER RICE OLIVEY, of Bury, in the County of Lancaster.
"IMPROVEMENTS.
IN LATHES AS REGARDS THE CHUCKS, TOOLS, AND IMPLEMENTS USED FOR SAME,
SPECIALLY APPLICABLE TO SCREW CUTTING."
My Invention for screw cutting consists mainly of the following arrange-
ments:-
First. I fit to the mandril of a lathe a chuck, say, about the length of an
ordinary chuck and the screw of the mandril combined.
On the end of this chuck is a screw the same size and depth as that on the
I then turn
mandril to take on it any of the other chucks belonging to the lathe.
the remainder of said chuck to receive a hollow cylinder, on the outside of which is
cut the screw to be copied, leaving a rim on the inside to catch the end of the
cylinder. Then having cut the screw to be copied on a cylinder of any convenient
metal, I fix it for use on the first mentioned chuck in either of the two following
ways First, by inserting a small stud just in front of the rim to fit into a slot in
the inside of the cylinder, in which case I make the cylinder just long enough to
reach the insides of either of the other chucks when screwed against it; or, secondly,
I dispense with the stud and let the cylinder project just far enough over the end of
the first mentioned chuck to be kept in position by either of the other chucks being
screwed on against it.
To obviate the necessity of removing the work the cylinder can be placed on the
back of the chuck and secured by suitable means, such as a screw tapped into the
chuck. A frame of wood or metal with a slot in it carries the guide and the tool
holder, the guide being provided preferably with a spring clip to run in the grooves
of the screw, and thus obviate the necessity for a rest for the tool to work upon. It
is obvious that the guide can be made without the clip, and work upon any ordinary
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rest. The tool holder and the guide are preferably tapped with threads running
nearly their whole length, so that they can be adjusted to the length required in
accordance with the work. The tool holder is flattened at the end to receive the
tool, on to which it is secured, so that the cutter can be placed to cut an outside or
inside screw.
The.action is as follows:-
The cylinder is placed on the-chuck-in-either_of_the_ways described, -the work.
being-screwed up against or on the chuck in the ordinary way. The guide-and-the-
tool holder being placed in proper position, the-guide-clip.is_placed in the screw
grooves on the cylinder and the tool against the work to be operated on. As the
guide travels in the grooves of the thread the tool cuts a like thread on the work,
and this is repeated till the screw is finished.
The cutter is either a single point or a chaser of the same pitched screw as the
guide, said chaser being so formed as to be fixed on the tool holder.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Walter Rice Olivey in the Great Seal Patent Office on the 26th
July 1879.
WALTER RICE OLIVEY, late of Bury, in the County of Lancaster, now residing at
3, Stormont Road, Lavender Hill, in the County of Surrey. "IMPROVEMENTS IN
LATHES AS REGARDS THE CHUCKS, TOOLS, AND IMPLEMENTS USED FOR SAMÉ,
SPECIALLY APPLICABLE TO SCREW CUTTING."
My Invention for screw-cutting consists substantially of the following arrange-
ments :-
First. I fit to the mandril of a lathe a chuck, say, about the length of an
ordinary chuck and the screw of the mandril combined. On the end of this chuck
is a screw the same size and depth as that on the mandril to take on it any of the
other chucks. belonging to the lathe. I then turn the remainder of said chuck to
receive a hollow cylinder, on the outside of which is cut the screw to be copied,
leaving on the chuck a rim to catch the end of the cylinder. Then having cut the
screw to be copied on a cylinder of any convenient metal, I fix it for use on the first
mentioned chuck in either of the two following ways:-First, by inserting á sinall
stud just in front of the rim to fit into a slot in the inside of the cylinder, in which
case I make the cylinder just long enough to reach the insides of either of the other
chucks when screwed against it; or, secondly, I dispense with the stud and let the
cylinder project just far enough over the end of the first mentioned chuck to be kept
in position by either of the other chucks being screwed on against it.
To obviate the necessity of removing the work the cylinder can be placed on the
back of the chuck and secured by suitable means, such as a screw tapped into the
chuck. A frame of wood or metal with a slot in it carries the guide and the tool
holder, the guide being provided preferably with a spring clip to run in the grooves
of the screw of the cylinder, and thus obviate the necessity for a rest for it to
work upon.
It is obvious that the guide can be made without the clip, and work upon any
ordinary rest. The tool holder and the guide are preferably tapped with threads
running nearly their whole length, so that they can be adjusted to the length
required in accordance with the work. The tool holder is flattened at the ond to
receive the tool, on to which it is screwed, so that the cutter can be placed 'to cut
an outside or inside screw.
The action is as follows:-
The cylinder is placed on the chuck in either of the ways described, the work
being screwed up against or on the chuck in the ordinary way. The guide and the
tool holder being placed in proper position, the guide clip is. placed in the screw
grooves on the cylinder, and the tool against the work to be operated on. As the
guide travels in the grooves of the thread the tool cuts a like thread on the work,
and this is repeated till the screw is finished. The cutter is either a single point or
a chaser of the same pitched screw as the guide, said chaser being so formed as to
be fixed on the tool holder.
I may here remark that ordinary chucks can be used with my arrangements by
dispensing with the rim on the back of the chuck, and putting the cylinder on from
the back and confining it by a screw or spring.
DESCRIPTION OF THE DRAWINGS.
Fig. 1, plan of my improvements for cutting outside threads.
Fig. 2, plan for cutting inside threads (showing only cutting tool and holder).
Fig. 3, sectional view of chuck; Fig. 3ª, sectional elevation of chuck for securing
either by screw or spring catch.
Fig. 4, end elevation showing hollow cylinder with screw to be copied with guide
and spring clip.

page_text: Fig. 5, elevation of frame with slot therein for carrying guide and tool holder, as
shown in Fig. 1.
In these Figures A is the chuck, with screw B; C, hollow cylinder, in which is
cut the thread to be copied; D, frame-of-wood or metal, with slot D'; E, guide
tapped with threads, as shown, so as to be adjusted to the length required; F, spring
clip_to_run_in_the_grooves of the screw; G, tool holder tapped with threads, as
shown,-so-that same can be adjusted to the length required in accordance with the
work; H, cutting tool screwed or secured on to the flattened end-of the holder G.
The cutting-tool-can-be-fixed_to_work an outside thread, as shown in Fig. 1, or an
inside thread, as shown in Fig. 2, by simply fixing the cutting-tool-for-the-work.
required, as shown. The hollow cylinder C, with the thread thereon to be copied,
is fixed on the chuck A, as before described; the work is then screwed up against
or on the chuck A in the ordinary way. The guide E with the spring clip F, and
also the tool holder G with the cutting tool H, is then brought into position, as
shown in Figs. 1 and 2, and as the guide E travels in the grooves of the thread the
tool H cuts a like thread on the work, and this is repeated till the screw is finished.
For inside threads the tool employed is, as shown in Fig. 2, the tool shown in
Fig. 1 being substituted for that shown in Fig. 2, the action being similar as in
Fig. 1.
Having now particularly described and ascertained the nature and object of the
said Invention, and in what manner the same is to be performed or carried out in
practice, I hereby declare that I claim the Invention of "Improvements in Lathes
as Regards the Chucks, Tools, and Implements Used for same, Specially Applicable
to Screw Cutting," comprising the arrangements of chucks, cylinder, tool holder,
and appliances, substantially as same are hereinbefore described, and illustrated by
the accompanying Drawings, it being understood that I do not limit myself to
the precise details shown by the said Drawings and herein before described with
reference thereto, as the same might be varied without departing from the essential
character of the said arrangements, as hereinbefore set forth and described.
In witness whereof, I, the said Walter Rice Olivey, have hereunto set my
hand and seal, this Twenty fourth day of July, in the year of our Lord One
thousand eight hundred and seventy-nine.
Witness,
T. MORGAN,
Secretary,
Inventors' Patentright Assn., L.,
21, Cockspur Street,
S.W.
W. R. OLIVEY. (LS.)