Year: 1898

page_text: I, CHARLES ALEXANDER BAILEY, of Cromwell, Middlesex County, Connecticut, in the
United States of America, Inventor, do hereby declare the nature of my invention
for pipe threading implement and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following statement :-
This invention is an implement for threading soft-metal pipe, the object being to
provide one which is simple and cheap in construction, and possesses the more
important advantage of being quickly and easily operated in forming threads.
In the drawings:
Figure 1 is a side view.
Fig. 2 is a longitudinal sectional view.
Fig. 3 is a longitudinal sectional view showing a modification.
A designates a plug which fits within the pipe and has a spindle a forming a
bearing for the operating lever, the outer end of said spindle being threaded to
receive a nut B which limits the movement of the lever and also serves to intimately
connect these parts. The plug A serves as a core in the end of the pipe to prevent
said pipe being crushed in during the operation of forming the threads thereon, and
the surface of this plug is plain though it may be provided with longitudinal
serrations to insure a better engagement with the inner side of the pipe.
I contemplate providing the implement with plugs of different sizes for use in
connection with different sizes of pipes.
C designates the operating lever, comprising a curved arm c and handle c¹, the
latter having a longitudinal bore while the arm has an opening for the spindle. The
bore is threaded at one end, as shown, and into the other end fits the shank d of
a carrier D having a yoke d¹ within which is mounted a swaging-roll F upon an
axle e bearing at its ends in said yoke. Upon the surface of said roll is formed
a spiral rib f, presenting a rotary die adapted when moved around the pipe and
embedded therein to form a thread thereon of a corresponding size and pitch. To
form different threads the swaging-roll is removed and another substituted. The
shank of the carrier has a longitudinal groove g into which projects the end of a set-
screw G passed through a threaded opening in the handle of the lever, the screw
preventing a rotary movement of the carrier while the groove permits of
a longitudinal feed thereof; this feeding movement being accomplished by an
adjusting-screw H let into the threaded portion of the handle and having a milled
head.
In the modification of the invention I have shown a manner of threading soft
metal pipe using a disk I, which is mounted in a carrier K, adjustable in the lever L,
as before, said lever having an internally threaded collar M which turns upon
a threaded sleeve N and is guided thereby in forming the threads. The sleeve is
keyed onto the spindle, preferably as shown, the spindle being held in positive
engagement with the pipe either by a plug, or by a mandrel comprising spindle O
and spreader P, the spindle having an inclined shoulder o upon which the spreader
rides when driven into place.

page_text: In turning the lever L it is gradually fed downward and the disk being embedded
in the pipe will form a thread thereon of a pitch corresponding with the threads on
the intermeshing collar and sleeve. In the operation of the implement shown in
Figs. 1 and 2, a single revolution of the lever Ċ forms a thread corresponding with
that on the die but reversed.
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. An implement for threading pipe, comprising a lever revolved around the pipe,
and a swaging-roll carried by the lever, said swaging-roll having a spiral rib thereon;
together with a plug or core fitting within the pipe.
2. In an implement for threading pipe, the combination of a plug or core fitting
within the pipe and comprising a spindle, a lever rotatably mounted on said spindle,
and a swaging-roll carried by said lever, the swaging-roll having a spiral rib
thereon.
3. In an implement for threading pipe, the combination of a plug, a spindle
extending therefrom, a nut screwed on the end of the spindle, and a lever mounted
on the spindle below the nut; together with a swaging-roll carried by the lever and
provided with a spiral rib.
4. In an implement for threading pipe, the combination of a plug, a spindle
extending therefrom, a lever mounted on the spindle, a carrier connected to the lever,
and means for setting said carrier; together with a swaging-roll mounted within the
carrier and provided with a spiral rib thereon.
5. In an implement for threading pipe, the combination of a plug, a spindle
extending therefrom, a lever mounted on the spindle, a carrier having a movement
within the lever, a screw engaging a threaded opening in the lever and bearing
against said carrier; together with a swaging-roll mounted within the carrier and
provided with a spiral rib.
6. In an implement for threading pipe, the combination of a plug having
a spindle, a lever mounted to rotate thereon comprising a curved arni and hollow
handle, a yoked carrier let into the hollow handle at one end thereof, a screw let into
the other end of said handle to bear against said carrier, means for preventing a rotary
movement of the carrier, and a swaging-roll mounted within the carrier and provided
with a spiral rib.
7. An implement for threading pipe, comprising a plug or mandrel, a lever having
a threaded collar engaging a threaded sleeve on the plug or mandrel, a carrier
adjustably movable within the lever, and a swaging-disk mounted within the
carrier.
1000
February 1898.
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.