An Improved Stock and Die.
Year: 1890

page_text: Date of Application, 8th May, 1890
Complete Specification Left. 7th Feb. 1891-Accepted, 11th Apr., 1891
PROVISIONAL SPECIFICATION.
An Improved Stock and Die.
I, WILLIAM WILSON HORN, of the firm of Horn & Son, of 151, Strand,
London, (a communication to me from abroad by John Kreger and Clara
Rusbridge, both of Buffalo, New York, U.S.A., Inventors,) do hereby declare
the nature of this invention to be as follows:-
1
This invention has for its object to provide a tool which is more effective in
operation than those tools of this class at present in use.
The stock consists of an annular central portion having two removable handles.
This central portion is provided with a threaded aperture, and it has secured thereto
a centering device, and die-holder combined, which consists of a recessed head
having a serrated portion and a shauk. A disc movably secured to the central
portion of the stock serves to regulate the depth of cut of the cutters, and is secured
in any position into which it is turned by a suitable pawl attached to the stock and
adapted to engage with the teeth or serratious in the head aforesaid.
Dated this 8th day of May 1890.
HAD17 ° CON
HORN & SON,
Agents for the Applicant.
COMPLETE SPECIFICATION.
An Improved Stock and Die.
I, WILLIAM WILSON HORN, of the firm of Horn & Son, of 151, Strand,
London, Middlesex, Patent Agent, do hereby declare the nature of this invention,
(a communication to me from abroad from John Kreger, Inventor, and Clara
Rusbridge, Gentlewoman, both of Buffalo, State of New York, United States of
America,) and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
This invention has general reference to improvements in pipe threading die-
stocks;
and it consists, essentially, in the novel and peculiar combination of parts
and details of construction, as hereinafter first fully set forth and described and then
pointed out in the claims.
In the drawings accompanying this Specification, which serve to illustrate my
said invention more fully
Fig. 1 is a side elevation of my improved device for threading pipes, bolts, and
similar objects.
Fig. 2 is a plan of the same.
Fig. 3 is a similar view with the die-holder removed.
Fig. 4 is a transverse sectional view of the die-holder detached.
Fig. 5 is a plan of the device for centering the pipe within the dic-stock and for
guiding it to the pipe threading die.
Fig. 6 is a plan of the fixed disk of said guiding device and
Fig. 7 a plan of one of the radial bars used in connection with said disk.
Like parts are designated by corresponding letters and figures of reference in all
the figures.
The object of this invention is the production of an efficient device for screw
threading pipes rods and similar articles and especially one which may be used in
confined positions, where the ordinary pipe threading devices are inoperative on
account of lack of space to revolve the pipe stock carrying the pipe threading die.
To attain these results I construct my device substantially of a stock A having

page_text: centrally an annular body and terminating in a socket S into which is remov-
ably placed the end of a handle A said stock A being provided with a further
handle A to manipulate the device in a proper manner.
Upon the stock A is located an upwardly protecting lug d having near its end a
transversely arranged screw threaded aperture to receive a correspondingly
threaded spindle having on one curl a button and on the opposite end a further
button as clearly shown in the drawings. Upon this stock A and on both sides
of the lng d, are pivoted pawl- E E by means of bolts, the shanks 1 and 2 of
which are properly perforated to receive the screw spindle heretofore mentioned,
springs being interposed between said pawls and the lug to push the shanks
of said pawls away from said projecting lug, as will hereinafter more fully appear.
In the annular portion of the stock A there is centrally an aperture a for the
reception of the shank B of the die-holder B while the said stock A, as well as
the socket S is underent at a' a" for the reception of the taper portion 13" of said
die-holder, though if so desired, these portions may be left straight without
interfering with the proper operation of the device.
The die-holder B has an angular recess to receive a pipe threading die 3 and
centrally a passage for the pipe to be threaded, said pipe threading die 3 heing
held within its recess by a pivoted cover h, secured to the head of the die-holder
by a screw mad a thumb screw a in the usual and well known mammer.
Below the head of the die-holder are formed a series of ratchet-teeth or
serrations B with which engage the ends of the pawls E E' in a manner hereinafter
to be referred to, while below these serrations there are located the conical portion B"
and shank Balready mentioned.
Below the central portion of the die-stock A. and upon the said shank B™ is
located an annular disk C, (shown in detail in Fig. 5) having cam-shaped recesses o
the edges of which are depressed at and grooved at el to receive the toes m' of
sliding bars M which bars move in properly arranged grooves o Fig. 6 located in
an annular boss or projection O" on a disk Ó, which said disk is suitably fastened
to the shank 1 of the die-holder and has laterally projecting a dial properly
graduated at o' to indicate, in conjunction with a pointer o" on the edge of the disk C
the position of the bars M, which as well as the disk C, are held in position by a
plate T Fig. 1, and screws (not shown) entering threaded apertures in the
annular projection (" as clearly illustrated in Figs. 6 and 7. The graduations of
on the dial are so set that when the operator desires to screw thread a certain size
of pipe he rotates the disk C until its pointer o indicates that particular size upon
the dial, there heing a stop upon said dial to prevent the disk C from being
revolved too far which would cause the guide bars M to run out of their grooves.
Instead of this stop s, 1 may, if desirable plug the outer ends of the grooves c' or
the end of the cam-shaped recesses c to prevent the sliding bars from being
displaced but I prefer the former construction on account of its simplicity.
In using this device the thumbscrew n on the dic-holder is loosened and the
cover swung open, whereupon a pipe threading die of the size required is placed
into the angular recess and the cover replaced and fastened. The disk C is now
revolved causing the bars M_to move radially toward the centre of the die-holder
on account of the cam-shaped recesses in said disk acting upon said bars, until the
pointer thereof reaches the mark on the dial indicating the correct size. If the
thread to be cut is n " right hand one the screw-spindle e is revolved until
the dog E engages the ratchet teeth 13 while the dog E is set. free; but if a
" left hand " thread is to be cut the screw-spindle is moved in an opposite direction
so that the dog E engages the ratchet-teeth and the dog E is set free. By now
moving the humlle A or both handles A and A" back and forth the pawl that
engages the ratchet-wheel will cause the die-holder to revolve and thereby to
thread the pipe. Engaging both dogs with said ratchet-wheel will lock the die-
holder so that to thread the pipe the entire pipe stock must be revolved.
It will now be seen that in confined places where the entire pipe stock cannot be
revolved, the pipe may be readily throaded by actuating the handle A" and

page_text: engaging the die holder by the proper pawl as heretofore described, removing the
handle A¹ from its socket S, if necessary, to reach into corners and other places not
otherwise accessible.
Having now particularly described and ascertained the nature of my said
invention (as communicated to me by my foreign correspondents), I declare that
what I claim is :-
1. In a pipe threading tool, the combination, with the stock having an annular
central portion and a removable handle, of a die-holder having ratchet-serrations
and pawls pivoted upon said stock and engaging said serrations, said pawls being
actuated by a screw spindle in conjunction with springs as and for the purpose
set forth.
2. In devices of the kind described, the combination, with the stock having the
upwardly projecting lng provided with a screw-threaded aperture, of two pawls
pivoted upon said stock, and a screw-spindle having buttons as described, acting
upon the shanks of said pawls, as and for the object stated.
3. In a pipe threading tool, the combination with the stock having the central
body A of a centering device and die-holder combined consisting of a recessed
head having a serrated portion B' and shank B, the disk C having cam-shaped
recesses, the disk O provided with the grooved annular rise, the radius bars actuated
by said cam-shaped recesses, and the plate to retain said radius bars in position, as
and for the object set forth.
4. In devices of the kind described, an adjustable guide and centering device
consisting of a disk C having cam shaped recesses c grooved along their edges, and
a pointer o¹ of a further disk O having annular projection O" provided with radial
grooves o and an index-dial o¹ and the radius-bars M having toes m' engaging the
grooved cam-shaped recesses, as and for the object stated.
Dated this 7th day of February 1891