Improvements, in, Lathes for Trimming Cylindrical Cases, and for other like purposes.
Year: 1896

page_text: Date, of. Application, 11th Jan.1896
Complete Specification Left, 10th-Oct.11896 Accepted, 21st Nov., 1895
PROVISIONAL SPECIFICATION.
Improvements, in, Lathes for Trimming Cylindrical Cases, and for
other like purposes.
We, WALTER BERNARD CHALLEN,, and TAYLOR AND CHALLEN, LIMITED,
of Derwent' Foundry, Constitution Hill;, in. the City of. Birmingham, Engineers,
do hereby declare the nature of this invention. to be as follows:-
This invention.consists of improvements in lathes for trimming cylindrical cases
and for other like. purposes, my object being to construct a compact machine of
few and simple parts, so arranged that the complete series of operations consisting
of the feeding of the cases or like articles on to the mandril or holder, the trimming
or cutting away, of rough edges or surplus: material, and the withdrawal or
extraction of the articles from the mandril, is automatically effected on the
revolution of the driving spindle.
In the application of our invention, we carry a driving spindle upon bearings
formed with or attached to a cast iron or other: suitable bed or framing. Upon the
spindle we mount fast and loose pulleys to receive motion by means of a belt from
a counter. or line, shaft in the ordinary manner. At one end of the spindle we
attach a mandril for. the reception of the case to be turned or trimmed. Beneath
the spindle we-mount a second or cross spindle driven by a worm-and worm-wheel
or other suitable gearing, fixed, upon the spindles.' Upon this second motion or
cross spindle we form or attach suitable cams for operating, the feeding and the
cutting mechanism in the manner hereinafter: described.
At one end of, the lathe; and above the first motion or driving spindle-we-fix a
vertical trough.or. hopper, into which is placed.the blanks or cases to be trimmed.
Immediately beneath the,lower, end, of the hopper we mount a slide or feeder 'which
is reciprocated; at. the proper times by a rod attached to one of the cams on the
second motion or cross shaft. By means of this reciprocating slide the cases-are
conveyed from the hopper and forced on the revolving. mandril.
The cutting or trimming of, the case whilst it. is revolving with the mandril is
effected with a cutter. consisting preferably of a hardened steel disc with a bevelled
cutting edge. The cutter is mounted on centres formed upon or attached to a
slide rest which is reciprocated as required by a rocking shaft operated-by a-eam
on the second. motion or cross shaft.
The case or blank is withdrawn from the mandrilt after trimming by means of an
extractor consisting of a forked piece attached to the slide or feeder. On the
return or, back stroke.of.the slide the forked projection which embraces the mandril
forces, off the case together..with the, ring; of surplus metal cut away from the same,
and thus clears,the, mandril. for the reception of the next blank or case to be forced
on to it with the forward,stroke of the,feeder.
Dated this 10th day of Jener 1906
... MARKS. & CLERK,
18 Southampton. Buildings, London, W.C., and
13 Temple Street, Birmingham, Agents for the. Applicants.

page_text: Improvements in Lathes for Trimming Cylindrical Cases, and for
other like purposes.
We WALTER BERNARD CHALLEN, and TAYLOR AND CHALLEN LIMITED,.
of Derwent Foundry, Constitution Hill, in the City of Birmingham, Engineers,.
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 consists of improvements in lathes for trimming cylindrical cases
and for other like purposes, our object being to construct a compact machine of
few and simple parts, so arranged that the complete series of operations consisting
of the feeding of the cases or like articles ou to the mandril or holder, the
trimming or cutting away of rough edges or surplus material and the withdrawal
or extraction of the articles from the mandril, is automatically effected on the
revolution of the driving spindle.
In the accompanying sheet of explanatory drawings to be hereinafter referred
to ;-
Figure 1 is a plan, Figure 2 a side elevation, and Figure 3 an end elevation of a
lathe constructed in accordance with our invention.
Figure 4 is an enlarged plan representing the slide or feeder, the mandril, and a
portion of the cutting disc.
The same reference letters in the different views indicate the same parts.
In the application of our invention we carry a driving spindle A upon bearings
formed with or attached to a cast iron or other suitable bed or framing B. Upon
the spindle we mount fast and loose pulleys C C' to receive motion by means of a
belt from a counter or line shaft in the ordinary manner. At one end of the
spindle we attach a maudril D for the reception of the case E or other article to
be turned or trimmed. Beneath the spindle A we mount a second or cross spindle F
driven by a worm and worm wheel as illustrated, or other suitable gearing fixed
upon the spindles. Upon this second motion or cross spindle F we form or attach
suitable cams such as G G¹ for operating the feeding and the cutting mechanism
in the manner hereinafter described.
At one end of the lathe and above the first motion or driving spindle A we fix
the inclined trough or hopper H into which are placed the blanks or cases to be
trimmed. Immediately beneath the lower end of the hopper H we mount a slide
or feeder J, having a thrust piece J' fitted within it, which receives the closed end
of the case. The feeder J is reciprocated at the proper times by a rod K attached
to the cam G on the second motion or cross shaft. By means of this reciprocating
slide the cases are conveyed from the hopper and forced on the revolving
mandril D.
The cutting or trimming of the case whilst it is revolving with the mandril is
effected with a cutter consisting preferably of a hardened steel disc L with a
bevelled cutting edge. The cutter is mounted on centres formed upon or attached
to a slide rest M which is reciprocated as required by a rocking shaft N operated
by the cam G on the second motion or cross shaft F. A recess or groove is cut
in the mandril adjacent to the disc L as shown at Figure 4.
The case or blank is withdrawn from the mandril after trimming by means of an
extractor consisting of a forked or eye piece O attached to the slide or feeder J.
On the return or back stroke of the slide J, the extractor O, which embraces the
mandril, forces off the case together with the ring of surplus metal cut away from
the same, and thus clears the mandril for the reception of the next blank or case
to be forced on to it with the forward stroke of the feeder.

page_text: Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is ;-
1. The improvements in lathes for trimming cylindrical cases and for other like
purposes whereby the complete series of operations consisting of the feeding of
the cases or like articles on to the mandril or holder, the trimming or cutting away
of rough edges or surplus material, and the withdrawal or extraction of the articles
from the mandril, is automatically effected on the revolution of the driving spindle,.
substantially as described and as illustrated.
2. In lathes for trimming cylindrical cases and for other like purposes the
combinations comprising the cam G, rod K, and feeder J having the extractor O
attached thereto and the cam G', rocking shaft N, and slide rest M, substantially
as described and as illustrated.
3. In lathes for trimming cylindrical cases and for other like purposes the
combination of a recessed or grooved revolving mandril such as D with a bevelled.
edge cutting disc L mounted between centres on a slide rest substantially as
described and as illustrated.
31
1000
MARKS & CLERK,
18 Southampton Buildings, London, W.C., and
13 Temple Street, Birmingham, Agents for the Applicants.