Improvements in or connected with Lathes for Manufacturing Screws, Nuts, and like Articles.
Year: 1897

page_text: Date of Application, 5th July, 1897
Complete Specification Left, 25th Mar., 1898-Accepted, 4th June, 1898
PROVISIONAL SPECIFICATION.
Improvements in or connected with Lathes for Manufacturing
Screws, Nuts, and like Articles.
I, EDWARD NICHOLS BANKS, of Beeston Road, Leeds, in the County of York,
Screw Manufacturer, do hereby declare the nature of this invention to be as
follows:-
This invention refers to machinery known as capstan lathes; and its object is
to construct the said lathes in such a manner that screws, nuts and like articles,
may be manufactured more speedily than heretofore, without increasing the num-
ber of machines or the number of workpeople employed.
According to my invention, I prolong the head-stocks of the machine a short
distance upwards, and in the upper portion of same I form bearings which are at
equal distances from the bearings at the base of the head-stocks. A similar hollow
mandrel to that which is fitted in the lower bearings, is fitted in the upper bear-
ings, and belt pulleys are mounted on one of the mandrels. The capstan is
prolonged upwards so as to provide a toolholder for the upper mandrel, and a
bracket is mounted on the bed plate of the machine, for the purpose of carrying
a horizontal slide, which carries two sets of cutting off or shaping tools. The two
mandrels are geared together by means of spur wheels or other suitable gearing,
in such a manner that the said two mandrels receive the same motion, and the
spindles that are carried in them are acted on in an exactly similar manner, by
both sets of cutting tools.
Improvements in or connected with Lathes for Manufacturing
Screws, Nuts, and like Articles.
I, EDWARD NICHOLS BANKS, of 100, Beeston Road, Leeds, in the County of York,
Screw Manufacturer, 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 refers to machinery known as capstan lathes, and its object is to
construct the said lathes in such a manner that screws, nuts, and like articles may
be manufactured more speedily than heretofore without increasing the number of
machines or the number of workpeople employed.

page_text: In order that my invention may be clearly understood, I will proceed to describe
same with reference to the accompanying drawing, in which similar letters refer
to like parts in all the figures.
Figure 1 is a side elevation, partly in section, of apparatus constructed in
accordance with my invention, and Figure 2 is an end elevation of same. Figure 3
is a cross section on line X, Y of Figure 1.
According to my invention, I prolong the headstocks A of the machine a short
distance upwards as indicated at B, and in the prolonged portions B I form bear-
ings C which are at equal distances from the bearings D in the lower portions A
of the headstock. A hollow mandrel E is fitted in the upper bearings C, similar
to that of the mandrel F which is fitted in the lower bearings D, and belt pulleys G
are mounted on one of the two mandrels, preferably the upper mandrel E as shewn
in the drawing. The capstan H is prolonged upwards at J, so as to provide a
tool holder for the upper mandrel E; and a double ended bracket K is mounted
on the bed plate L of the machine in a horizontal slide K¹, for the purpose of
carrying two sets of cutting off or shaping tools in the holders M, M and N, N.
The mandrels E and F are geared together by means of spur wheels P or other
suitable gearing, in such a manner that the said mandrels receive the same
motion; and the spindles that are carried in the two mandrels E and F are acted
on in an exactly similar manner, by their respective set of cutting tools.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:
1
1. The employment of two mandrels geared together and working in one head-
stock, in combination with a double capstan, and a bracket carrying two sets
of tools, substantially as and for the purposes set forth.
2. The headstock A prolonged at B, carrying two mandrels E and F geared
together by spur wheels P, in combination with suitable tools and tool holders
whereby two sets of work may be operated simultaneously, substantially as set
forth.
3. The combination of the headstocks A prolonged at B, bearings C and D,
mandrels E and F, belt pulleys G, gearing P, capstan H prolonged at J, double
ended bracket K and tool holders M, M and N, N, substantially as and for the
.purposes set forth.
Dated this 25th day of March A D 1898