Improvements in Lathe Tools.
Year: 1890

page_text: Date of Application, 13th May, 1890-Accepted, 12th July, 1890
COMPLETE SPECIFICATION.
Improvements in Lathe Tools.
I, GEORGE LIGOWSKY, of the Town of Cincinnati, in the County of Hamilton, and
State of Ohio, Engineer, do hereby declare the nature of my said invention, and in
what manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
My invention relates to that class of lathe tools for insertion in a sliding head,
usually a monitor, to be advanced up to and operate upon the work which is secured to
and revolved by the lathe spindle. It has for its object the improved construction of
such tools whereby their capacity and efficiency are increased.
The novelty of my invention will be hereinafter set forth and specifically pointed
out in the claims.
In the accompanying drawings,
Figure 1, is a front elevation of a tool embodying my invention.
Figure 2, is a side elevation of the tool in section through the dotted line x-x of
Figure 1.
Figure 3, is a plan view of the tool.
Figure 4, is a front elevation of a tool in modified form embodying my invention.
Figure 5, is a plan view of the same.
Figure 6, is a side elevation of the same in section through the dotted line y-y of
Figure 5.
Figure 7, is an elevation of a valve stem operated on by the tool shown in Figures 4, 5
and 6.
The same letters of reference are used to indicate identical parts in all the figures.
The body A of the tool is a metal block, having a shank B for insertion in the
monitor or sliding head, and having a recess C on its front face, into which the work
revolved by the lathe spindle enters to be acted on by the cutters carried by the tool.
In Figures 1, 2 and 3 the tool is adapted to dress at one operation five faces of a
valve disk casting D, shown in Figure 2. Here there is a central cutter E secured in
the recess by a set screw a and held from, chattering by a pin b. This cutter
dresses the rear edge and interior of a collar or boss upon the disk D, while an
adjustable inclined cutter F, contained in a recess c, Figure 3, in a projecting flange d
and adjusted by a set screw e, dresses the flat edge of the disk above its seat.
Pivoted to the side of the body as at f is a swinging arm G provided with an
operating handle g and a lateral projection h, to which is removably and adjustably
secured a cutter i, having in this instance two cutting edges, and which is adapted to
be swung by grasping the handle so as to cut the curved seating part of the disk
and the flat side of the collar beneath the same, as indicated by the dotted lines in
Figure 2.
The lower part of the arm G has a projection j, which, when the arm is swung
forward and to the proper limit, comes in contact with a set screw k, shown by dotted
lines in Figure 2, inserted through a lug on the side of the body and thus arrests
the further forward movement of the cutter i.
.
In Figures 4, 5 and 6, the tool is shown somewhat modified to dress five surfaces
of the valve stem and valve represented by Figure 7. Here the cutter E is omitted
and in addition to the stationary cutter F there are two other similar stationary
cutters F1, F2, of which F dresses the smaller part m of the spindle, F¹ the larger
parts n, o, and F the part p, while the swinging cutter i dresses the rounded or
seating part of the valve.

page_text: 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 In a lathe tool, the combination, with the recessed body and one or more
stationary cutters, of a swinging cutter whose support is pivoted and secured upon
the body, substantially as specified and shown.
2: In a lathe tool, the combination, with the recessed body and one or more
stationary cutters, of a swinging cutter whose support is pivoted and secured upon
the body, and a stop for said swinging cutter, substantially as specified and shown.
3: The combination, with the recessed body A, provided with one or more
stationary cutters, of the pivoted swinging arm G, provided with a handle g and
projection and the cutter i, secured to the projection 1, substantially in the manner
hereinbefore set forth and shown.
11
101
1000
ALLISON BROS.,
Agents for the Applicant.