Improvements in Lathes or Turning Machines.
Year: 1894

page_text: Date of Application, 6th Feb., 1894-Accepted, 11th Aug., 1894
COMPLETE SPECIFICATION.
[Communicated from abroad by CHARLES M. DAVIS, of 42, Cambridge Street,
Boston, in the County of Suffolk, and State of Massachusetts, United States
of America, Wood Turner.]
Improvements in Lathes or Turning Machines.
I, HENRY HARRIS LAKE, of the Firm of Haseltine, Lake & Co., Patent
Agents, 45 Southampton Buildings, in the County of Middlesex, 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 relates to turning machines and as illustrated in the accompanying
drawing in which
Figures 1 to 6 illustrate my new device; and
Figure 7 shows a modification.
A is the bed plate and a a' the angular arms, the tops of which form ways,
upon which the reciprocating cutter-carrier B moves. A rotary cutter-head D is
journalled into the arms bb of the cutter-carrier B, and provided with pulleys d
for the rotation of the cutter-head, as will be readily understood by all skilled in
the art without further description. Cutter-carrier B is formed with projections d'
at either end, which are engaged by screws a² a² mounted in lugs a³ of frame A a a¹.
These screws are each provided with a bevelled gear a', which mesh with bevelled
gears a³ on a shaft a, which is at right angles to the screws a², a² and is mounted
in lugs a' a', carried by the frame A a a¹.
Shaft a carries a gear a³, which meshes with the screw a mounted in bracket a¹0
fast to the frame A a a', the screw being provided with a hand-wheel a". Rotation
of shaft a drives the screws a² simultaneously, and cutter-carrier B is thereby
caused to travel upon its ways either backwards or forwards, according to the
direction in which the shaft a³ is rotated.
Base-plate A is formed in such wise as to enable it to be firmly clamped upon'
the bed-plate L of a lathe between the poppets p thereof, by bolts A¹ the work
being secured between the poppets between the front of the machine and the main
head D, so that the cutter-head may be reciprocated against and out of contact
with the work by means of the carrier operating mechanism already described, or
the equivalent thereof.
If it is desired to turn out work which is polygonal in cross section, I lock the
live-head-stock, disc p' of which is provided with holes on its periphery to
receive the hook p³ hinged at p to the lathe; and ship belt from the live-head
stock. Thereupon the work is held stationary and the cutter advanced to operate
on the desired portion of the work. A surface being cut, the cutter-head is moved
away from the work, hook p³ drawn from its hole p² in the disc p', and the disc p',
which is fast on the journal of poppet p in the live-head-stock, rotated so as to
shift the work the desired distance, when it is again subjected to the action of the
cutters.
Another feature of my invention consists in auxiliary frame G, which is made
up of side pieces g g and cross piece 9. Frame G is hinged to cutter-carrier B
in this case upon arins 62 thereof. Frame G is thus readily swung out of the way
when it is not in use, and when the workman desires to use it, it is readily swung
into place, as will be plain from Figure 3 where it is shown by dotted lines in its
operative position.
When frame G is used, it is swung into position shown by dotted lines in
Figure 3, and the stock S (see Figure 4) placed in front of the reciprocating
work-carrier G', which slides upon the side pieces g of frame G. It will be seen

page_text: from Figure 4 that when the stock S is in place on the work-carrier G', the cutter-
bead I will operate upon the lower portion of the stock, whose underside will
consequently be cut according to the configuration of the cutting edges of the
blades. If it should be desired to cut stock S diagonally, the work-carrier G¹ is
shifted at one or the other of its ends, so as to be diagonal to the side pieces 9,
and to readily accomplish this, the track picces g², which are between the side
pieces g, and the work-carrier G¹, are provided with holes ³ to receive the
screws which pass through slots in the work-carrier G¹, whereby work-
carrier G¹ may be adjusted diagonally in relation to the side pieces g which are of
course at right angles to the longitudinal axis of the cutter-head D.
In many cases it is desirable to provide base-plate A with an automatically
adjustable work-support, so that as one side of a stock is cut away when the stock
is supported between the poppets p p, the support automatically moves upwardly
to keep in proper contact with the work. Ordinarily this work-support is midway
between the ends of frame A a a¹ and in line with the poppets of the lathe upon
which the attachment is used. I therefore, form base-plate A with a hole near the
middle of its upper surface, to receive the shank of the automatically adjustable
work-support H. This support consists of a block ', having a chamber 2, and
provided at its lower end with a shank h, by which it is mounted upright on the
upper surface of the base-plate A, as shown in Figures 2 and 3. Chamber
receives the shanks h³ of a rest, and between the bottom of the chamber and
the inner end of shank ³ a spring 5 is interposed. When the support H is to be
used, it is set upright on base-plate A, and the rest forced down against the
tension of the spring 5 and clamped into position by clamp screw through
block h¹ and engaging the shank 3. The work being secured between the poppets,
set screw is turned back to release the shank, and the spring / forces the rest h*
of the work-support H against the work, and as the work is cut away, the continued
expansion of the spring automatically keeps the work-support H in contact with
the work, as will be readily understood by all skilled in the art without further
description.
In Figure 7 I show a modification, in which the mechanism for reciprocating-
the cutter-carrier B is made up of a swinging frame K and journalled at k to the
cutter-carrier. This frame is composed of side pieces ', a cross-piece k², which is
connected with a hand-lever K2 journalled to the frame A a a¹.
In this modification also the mechanism for reciprocating the cutter-carrier is
wholly supported and carried by the frame A a a', so that my attachment in this
form as well as in its other form herein before described, may be removed bodily
from the lathe, which is then accessible for other uses.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, as communicated to me by
my foreign correspondent, I declare that what I claim is :-
First. In a lathe attachment, the combination of a frame formed of a base and
projecting arms which are formed with tracks; a reciprocating cutter-carrier
mounted on said tracks; a rotary cutter journalled in the reciprocating cutter-
carrier; means substantially such as described for actuating the cutter-carrier,
said actuating mechanism being mounted on said frame; an auxiliary frame
supported by the aforesaid frame and a work support moving on said auxiliary
frame, all substantially as and for the purpose set forth.
Second. In a lathe attachment, the herein described combination of a frame
formed of a base and projecting arms, which are formed with tracks; a recipro-
cating cutter-carrier mounted on said tracks; a rotary cutter journalled in the
reciprocating cutter-carrier; and means substantially such as described for
actuating the cutter-carrier, said actuating mechanism being supported by said
frame; an automatically adjustable work support mounted on said base between
the projecting arms thereof, all substantially as and for the purpose set forth.
Third. In a lathe attachment, the herein described combination of a frame

page_text: formed of a base and projecting arms which are formed with tracks; a reciprocating
cutter-carrier mounted on said tracks; a rotary cutter journalled in the recipro-
cating cutter-carrier; and means substantially such as described for actuating
the cutter-carrier, said actuating mechanism being supported by said frame, all
substantially as and for the purpose set forth.
Dated this 6th day of February 1894.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.