provements in Adjustable Die Stocks for Cutting Screw Threads and Pipes.
Year: 1894

page_text: Date of Application, 27th Dec, 1894
Complete Specihcation Left, 27th Sept, 18°5-Accepted, 2nd Nov, 1595
PROVISIONAL SPECIFICATION
Improvements in Adjustable Die Stocks for Cutting Screw Threads
and Pipes.
1 PHILIP WINN, of Granville Street, Birmingham, in the County of Warwick
Engineer do hereby declare the nature of this invention to be as follows
-
My invention has for its object improvements in adjustable die stocks for
cutting screw threads and pipes and is so arranged that it will cut several sizes
without change of dies, at the same time ictaining strength and rigidity to cut
au accurate thread at whichever size is required.
In constructing a die stock, according to my montion, I form in the main or
hody part of the stock, a number of slots or grooves into which the dies are placed,
nd the whole is then covered with a circular cap containing radial projections on
the underside which fit into small slots in the loose dies. This cap is held to its
work by means of a clamping plate secured in a suitable minune and so arranged
to prevent any possibility of the dies moving during the process of screwing &
utting.
When it is desired to alter the dies from one size to another it is only necessary
to release the clamping plate, thereby allowing the cap to be rotated in eithe
dnection, imparting at the same time a radial motion to the dies by means of the
internal projections in the said cap. It will therefore be readily seen that by
arianging a suitable index in any convenient position on the side of the stock I can
accurately set the dies to the diameter requned.
I also a range on the opposite side of the stock to that which contains the dies,
a number of slots or grooves contaming guide pieces which are made adjustable in a
Similar manner to that aheady described.
In cutting-off tubes insert in place of the said guides on dies one or more
cutters which with the same adjustment as herein explained forms an easy and
effectual cutting-off tool.
Another important feature of my invention is the detachable arm or handle
which I form hollow and fix to the main or body part of the stock by means of n
stewed end and lock-nut, the latter while preventing the arm fiom becoming
loose also permits of it being readily taken apart when necessary,
Dated this 26th day of December 1894.
Improvements in Adjustable Die Stocks for Cutting Screw Threads
and Pipes.
I, PHILIP WINN, of Granville Street, Birmingham, in the County of Warwick,
Engineer, do hereby declate 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
-
My invention has for its object improvements in adjustable die stocks for
cutting sciew threads and pipes and is so arranged that it will cut several sizes
te o27

page_text: without change of dies, at the same time retaining strength and igidity to cut an
acemate thread at whichever size is requned
To make my invention more clearly understood I have appended hereunto one
sheet of diawings upon which I have illustrated thice views of one example of au
adjustable die stock made according to my invention
Figure 1 is a side elevation, shewing means of adjustment, and
Figure 2 is a plan of same.
Figure 3 is a longitudinal section shewing dies and guides in working position.
Refering to Figure 1, it will be seen that the main or body part A is formed
separate from the two loose adjusting caps B and C which are free to revolve and
are milled on the outer edge to afford a firm grip for the hand, in addition to a
small hole, D, for a lever when requned. The index A' is arianged m any con-
venient position and is for the pui pose of accurately setting the dies to the size
requited
Figures 2 and 3 shew more clearly the construction of my invention, which 15
as follows, I form in the 'body part A a number of slots of grooves E into which
the dies G are placed and are free to slide, these said dies having small slots at G¹
for the purpose of receiving the eccentric projections contained in the loose
cap B, and this cap, as before mentioned, being fee to revolve, enables the dies to
be moved either backwards or forwards by means of the sand eccentric projections II
aud small slots G¹.
The cap B is held to its work by a clamping plate J which is secured by set
pins J', screwed into the body A, shown more clearly at Figure 3
It will therefore be readily seen that when it is desired to alter the dies from
one size to another it is only necessary to ease the small set pins which
releases the pressure of the clamping plate J upon the cap, permitting it to be
evolved in either ducction thus affording an easy and effective method of altering
the dies as required.
I also aange on the opposite side of the stock to that which contains the dies,
a number of guide pieces K, which are made adjustable in precisely the same
manue as already described.
In cutting off tubes I insert in place of the said guides K or dies G one or more
cutters of suitable design which, with the same adjustment as herein explained,
forms an easy and effectual cutting-ofl tool.
Another important feature of my invention is the detachable arm or handle L
which form hollow and fix to the main or body part of the stock by means of a
screwed end L' and lock-uut M, the latter, while preventing the arm from
becoming loose, also peints of its being readily taken apart when necessary
Of course, I do not confine myself to the precise details as shown upon tho
diawings as modifications can be made without altering the punciple of the
invention.
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 The improvements in adjustable die stocks and dies, of a loose cap and
clamping plate containing eccentric projections engaging in small slots in dies
substantially as herein set forth and shewn upon the drawings
2 The improvements in stocks and dies of a loose arm or handle substantially
as herein set forth and shewn upon the drawings.
3. The improvements in stocks and dies of an arrangement for cutting off tubes
substantially as herein set forth.
Dated this 26th day of September 1895.
PHILIP WINN.