IMPROVE- MENTS IN STOCKS AND DIES
Year: 1884

page_text: I JOHN CHARLES BAUER, of 11 Comerford Road, Brockley in the County of
Kent, Engineer do hereby declare the nature of the said Invention for "IMPROVE-
MENTS IN STOCKS AND DIES" to be as follows:-
This Invention relates to improvements in stocks and dies, the improvements
having chiefly for object to combine in one tool an entire set of adjustable dies
with simple means for adjusting the same.
.
In carrying out my Invention I employ two discs turning on centres or pivots
one of which is eccentric; around the periphery of each disc and at suitable
distances apart I form the cutting threads in such a manner that when the discs
are properly adjusted the corresponding threads to form a pair of dies will be
brought into working position. The discs are held together and in position by a
plate or plates and screw nuts on the upper ends of the pivots of the discs. To
adjust the dies the discs are slackened and the pair of dies required are brought
into position by turning the discs which are then clamped; the eccentric pivot is
then turned by a spanner or otherwise and the pair of dies will then be closed into
their cutting position..
The tool is provided with suitable handles and in place of employing ản
eccentric pivot operated by a spanner I cau employ cams or screws to tighten up
the discs.
Dated this Seventeenth day of Mürch 1884.
G. F. REDFERN,
Agout for the Applicant

page_text: I JOHN CHARLES BAUER of 11 Comerford Road Brockley in the County of Kent,
Engineer do hereby declare the nature of my Invention for "IMPROVEMENTS IN
STOCKS AND DIES" 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 improvements in stocks and dies the improvements
having chiefly for object to combine in one tool an entire set of adjustable dies with
simple means for adjusting the same.
In carrying out my Invention I employ two discs turning on centres or pivots
one of which is eccentric; around the periphery of each disc and at suitable
distances apart I form the cutting threads in such a manner that when the discs
are properly adjusted the corresponding threads to form a pair of dies will be
brought into working position. The discs are held together and in position by a
plate or plates and by screws on the pivots of the discs.
The tool is provided with suitable handles, and in place of employing an
eccentric pivot operated by a spanner I can employ screws to tighten up the discs.
In order to enable my Invention to be fully understood I will proceed to describe
the same by reference to the accompanying Drawing in which Figure 1 is a plan,
Figure 2 a horizontal section and Figure 3 a longitudinal vertical section of a.
stock and dies constructed according to my Invention and in which one of the discs
turns on an eccentric pivot and the other disc on a concentric pivot; Figures 4, 5
and 6 are similar views.to Figures 1, 2 and 3 but in which both discs turn upon
concentric pivots; Figures 7, 8, and 9 are also similar views to Figures 1, 2 and 3
but shewing an arrangement in which the discs are caused to approach each other
by means of screws. Similar letters in all the Figures represent similar parts.
I will first describe my Invention by reference to Figures 1, 2 and 3.
a, and a', are the two discs and b, and 61, are the centres or pivots on which the
discs a, and a', turn the pivot b¹, being eccentric to its corresponding disc a¹;
c, c, c, are the cutting threads or dies formed at suitable distances apart around the
periphery of each of the discs a, and a¹, in such a manner that when the discs are
properly adjusted by rotating the same the corresponding threads to form a pair of
dies will be brought into working position; d, d, are the plates and e, c¹, the screws
serving to hold the discs a, and a¹, in position between the handles d', d', the
screws e, and e¹, may be formed on the pivots b, and b¹, in the manner shewn the
screw e, having a hexagonal head and the screw e¹, having a nut for clamping the
discs a, and a; the eccentric pivot ', is formed with a square end as clearly
shewn in Figure 1 to operate its eccentric,part; f, f, are openings in the plates d; d,
to admit of the insertion of the bolt, pipe or other article on which the screw
thread is to be cut.
To adjust the dies (the plates and discs being clamped) the discs a, and a', are
slackened by turning the screw e, and the nut of the screw e¹, by a spanner or
otherwise; the required pair of dies c, are then brought into position by turning
the discs a, and a¹, which are then again clamped the eccentric pivot b¹, is then
turned and the pair of dies will be thereby closed into their cutting position.
The arrangement shewn in Figures 4, 5 and 6 is similar to that herein before
described and represented in Figures 1, 2 and 3, with the exception that both the
pivots of the discs a,, and a', are concentric; the lower plate d, is dispensed with
and the upper plate is shewn formed in one piece with the handles d', d'; the
operation is also similar to that hereinbefore described except that as there is
no eccentric pivot in this arrangement both the discs are adjusted concentrically
only.

page_text: In the arrangement shewn in Figures 7, 8 and 9 the dies are adjusted in a
similar manner to that hereinbefore described when referring to Figures 1, 2 and 3
but the pair of dies are closed into their cutting position by means of rods g, g,
within the handles d', d, and operated by screw caps h, h; the said rods having
crutch shaped ends to form an even bearing against the discs a, and a¹; the holes
in the plate d, in which the pivots b, and b¹, have their bearing are elongated to
allow of this lateral movement of the discs a, and a¹.
It will be understood that although I have shewn the screw stock and dies
represented in Figures 1, 2 and 3 as having two plates d, d, I may in some cases
dispense with one of the said plates.
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 screw stock and dies the employment of a pair of discs each having
around its periphery a number of cutting threads of various sizes and so arranged
as to allow threads of corresponding size to be brought into proper position to form
screw dies for cutting threads on bolts, pipes or the like substantially as herein-
before described.
2. In a screw stock and dies such as above described the employment of an
eccentric pivot within the part or parts having the cutting threads forming the
dies operating as and for the purpose herein before described.
3. In a screw stock and dies such as above described the method of closing
the dies into cutting position by means of a suitable screw arrangement such
as rods within the handles operated by screw caps substantially as hereinbefore
described.
4. The improved stocks and dies herein before described and represented in the
various Figures of the accompanying Drawing.