A Feed Motion for Hollow and Open Spindle Capstan Lathes.
Year: 1892

page_text: Date of Application, 11th Feb., 1892
Complete Specification Left, 16th June, 1892-Accepted, 6th Aug., 1892
PROVISIONAL SPECIFICATION.
A Feed Motion for Hollow and Open Spindle Capstan Lathes.
JOHN LANG Junr. and ROBERT LANG Lathe Manufacturers and Special
Machine Tool Makers Laigh Cartside Street Johnstone N.B. do hereby declare the
nature of this invention to be as follows :—
Our said invention has for its object to arrange a feed motion for hollow and
open spindle capstan lathes, that can be changed quickly from one feed to another,
by the movement of a handle without stopping lathe.
It is also arranged to be under the complete control of workman where he stands
to operate the lathe; so that his time is not taken up shifting belts or changing
wheels as in old style.
The mechanism for changing the rate of feed is arranged on bed of lathe and the
following is a description of the arrangement.
On the feed shaft along bed which may either be at the front or back there are
two, three or more wheels (according to the number of feeds required) of different
diameters keyed to shaft; these are driven by wheels arranged on a second shaft
which is hollow.
Inside this hollow shaft there is a rod to which is attached a double key; that
can be moved from one pair of wheels to another so as to give the desired feed.
The movement of double key is effected by a handle within easy reach of
workman.
Dated this 9th day of February 1892.
JOHN LANG, JUNE.
ROBERT LANG.
COMPLETE SPECIFICATION.
A Feed Motion for Hollow and Open Spindle Capstan Lathes.
JOHN LANG Junr. and ROBERT LANG Lathe Manufacturers and Special
Machine Tool Makers, Laigh Cartside Street Johnstone N.B. do hereby declare
the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:
Our invention has for its object to arrange a feed motion for hollow & open
spindle capstan lathes that can be changed quickly from one feed to another by the
movement of a handle without stopping lathe, and which is convenient to and under
the complete control of workman where he stands to operate the lathe, so that his
time is not taken up shifting belts or changing wheels as in the old style.
In order that our said invention may be properly understood and readily carried
into effect we have appended a drawing illustrating clearly the arrangement of our
feed motion. Such parts of the said lathe being omitted as are not necessary to the
understanding of our invention. In the several figures of the annexed drawing
corresponding parts are marked with the same letters of reference.
Fig. 1 is an end elevation of lathe bed showing handle and feed shafta.
Fig. 2 is a side elevation of lathe bed showing the arrangement of feed motion.
Fig. 3 is a side elevation of wheel C' showing keyways.
The following is a description of how the mechanism is arranged :-
In Figs. 1 & 2 the bed A of lathe has brackets cast on for carrying shafts B
and G and rod E. The pulley K which is fixed to shaft B is driven from a pulley
on fast headstock of lathe by a belt in the usual wew On ahaft R there are three

page_text: Said
wheels C¹, C, C³ working into three corresponding wheels on shaft G.
wheels C, C & C work loose on shaft B. On the end of rod E inside shaft B
there is a key D which drives either of the three wheels C', C² or C³. In Fig. 2
the key is shown driving C. By moving handle F into its three different positions
the key D is made to engage and connect shaft B with any of the three
wheels C, C or C³ so that shaft G has three different speeds arranged to suit the
size of lathe and the work it is intended to do. It will therefore be clearly under-
stood that by moving the handle F (which can be done without stopping the lathe)
the shaft G can be made to revolve at different speeds which gives different feeds
to lathe. In Fig. 2 the three ranges of wheels C¹, C³, C³ give three feeds but
this number might be reduced or increased according to the number of feeds
required.
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 :-
The use and application of a handle arranged to move a key inside wheels for
effecting the changes of feeds on hollow and open spindle capstan lathes.
3000
JOHN LANG, JUNR.
ROBERT LANG.
JOHN LANG, JUNE.
ROBERT LANG.