Improvements in Machines and Tools for Threading and Cutting off Pipes, Rods, and the like.
Year: 1891

page_text: Date of Application, 10th Dec., 1891-Accepted, 16th Jan., 1892
COMPLETE SPECIFICATION.
Improvements in Machines and Tools for Threading and Cutting off
Pipes, Rods, and the like.
I FRANK ARMSTRONG, of 110 William Street, Bridgeport in the County of
Fairfield, State of Connecticut, United States of America, Engineer, 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 certain new and useful improvements in machines and
tools for threading and cutting off pipes, rods and the like, but more particularly
does it appertain to the adjustment of the threading and cutting off tools whereby
they may be capable of ready adjustment to accommodate various sizes of work;
and with these ends in view my invention consists in the construction and
combination of elements hereinafter fully explained and then recited in the
claims.
In order that those skilled in the art to which my invention appertains may fully
understand its construction and operation, I will describe the same in detail,
reference being had to the accompanying drawings which form a part of this
Specification.
Figure 1, shows my invention in plan view and applied to a die stock adapted for
operation by hand,
Figure 2, is a section at the line y-y of Figure 1,
Figures 3 and 4, are detail modifications both shown in section.
Though I have shown my invention as applied to die stocks operated by hand, it
is equally applicable either to large stationary machines, or to smaller and portable
machines, and the principle herein shown and described is equally adapted either
for cutting-off or threading machines, or to machines capable of both functions.
The head of the die stock, designated by 1, is provided with handles 2 and is
tubular, having the opening 3 through which the work may project. The opening 3
is preferably formed in a separate piece several of which of different interior
diameters accompany each stock. In the face of the stock shown in Figures 1
and 2 are formed seats for the accommodation of the threading dies 5 each of which is
preferably provided with a cutting surface 6 at each end. For the purpose of holding
the dies in their seats the screw and washer 7 are provided, the edge of the washer
overlapping the top of the die and holding it in place. In the edges of the stock
beneath each die is formed a screw-threaded seat 8 in which runs a screw 9 having
a head for the attachment of a wrench or key, and having also a flange or collar 10
which takes into a slot or recess in the bottom face of the die, as is clearly shown
at Figure 2. As will be readily understood from the foregoing description and the
drawings, the dies are firmly held in any desired position by means of these collar-
bearing screws, and by the same means they may be retracted or thrust forward to
accommodate different sizes of work. For the purpose of adjusting the dies
accurately cach should be provided with a standard mark a which may be aligned
with either of a number of standard marks b upon the face of the stock.
The construction shown at Figure 3 differs from that shown in the preceding
figures in that the die is provided upon its under side with a partial screw thread 11,
and is operated by means of a screw 12 which is located in a socket 13 in the head
and is prevented from moving longitudinally therein by means of a pin 14.
The construction shown at Figure 4 is similar to that shown in Figures 1 and 2,
except that the flange or collar 10 upon the screw 9 is located in a recess in the
stock below the die, the screw projecting outside the stock substantially as shown
at Figure 3.
Each of the foregoing constructions I consider to be the equivalent of the others.

page_text: Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is :-
1. In a machine of the character described and in combination with the head or
stock, one or more dies seated and adapted to slide in said head, a screw also seated
in said head and parallel with the die, and a connection substantially as described
between said screw and die for the operation of the latter by the former.
2. The combination with the stock, of the dies seated and adapted to slide
therein, a screw seated beneath the die and parallel therewith, and a flange or
collar upon the screw engaging and adapted to operate said dies, substantially as
described.
Dated this 9th day of December 1891.
H. B. BARLOW,
17, St. Ann's Square, Manchester, Agent for Applicant.