Improvements in Die-stocks.
Year: 1898

page_text: Date of Application, 17th Sept., 1898-Accepted, 29th Oct., 1898
Improvements in Die-stocks.
We, CARL BLOMBACH and HUGO BLOMBACH, of the City of Ronsdorf, in the
German Empire, Manufacturers, 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 :-
Our invention relates to an improved die-stock of that class in which the screw
dies are simultaneously adjusted by cams, excentric projections or the like and it
consists in a characteristic combination of straight disks with the frame of the tool
which accomplishes always a quick and convenient adjustment of the dies.
Our invention further consists in an attachment which is adapted to serve as
guide for the die stock embracing for this purpose the screw bolt by means of
adjustable dies so that a clean thread may be cut on the bolt. By means of this
attachment the die stock may be also used as a tap wrench.
The manner in which we prefer to carry our invention into effect is shewn in the
accompanying drawing and the letters of reference in this specification refer to
similar letters in the drawing.
Figure 1 is a plan of the die stock seen from the top face.
Figure 2 is a plan seen from below.
Figure 3 is a section taken in longitudinal direction of the die stock.
Figure 4 is a section at right angle to Figure 3.
The improved die stock consists of a frame a which is furnished with lever
handles 6 of solid or hollow metal for turning it in the circular direction. The
frame a is provided with a longitudinal slot c in which are enclosed the dies d.
They rest on a plate e which is turnable secured to the bottom of the frame a by
means of a shoulder f. A like plate e¹ is arranged to the top of frame a being
also guided by a shoulder 1. Both plates are connected together by bending a
prolongation g of plate e upwards and securing it detachable to plate e¹ by a
pin fitting in a corresponding hole of a handle h. By means of this handle
forming part of plate el both plates e, e¹ may be turned together.
The plates are provided with a central hole i through which the screw bolt may
pass and excentrically to these holes curved slots are cut in the plates e, e¹ into
which fit studs projecting from the dies d upwards and downwards.
From this it will easy be understood that by turning the plates e, e¹ by the
handle the dies d are adjusted at will. A set screw m tapped into the upright
shank g of plate e serves to regulate the distance between the halves of the dies
and a protuberance n provided on the side of frame a limits the turning of
plates e, e¹.
In order to prevent an upwards lifting of plates e, e¹ into the frame a are tapped
screws o, with which correspond round cuts u for the purpose of detaching plate e¹.
To the bottom of frame a is attached a bridge p by screws p¹ which is provided
in longitudinal direction with a bevilled groove q. Into this groove fit a pair of
dies Figure 2 which are actuated in the same manner as the screw dies d. For
this purpose in the bridge p is turnably guided a plates having a handle 8' which
is furnished with a central hole 82 that corresponds with the holes i in the

page_text: plates e, el. The plate s is provided with excentric slots 83 and to the dies are
rivetted studs t which engaging said slots & cause that when the plate s is moved
the dies are opened and closed.
In using our improved die stock the dies r embrace the bolt of the screw so that
the die stock is coersed to travel its path without edging and a smooth and sharp
thread is obtained. Our die stock may be also used as a tap wrench and in this
case the head of the tap is inserted between the two dies r.
If a screw should be threaded close to its head the bridge may be taken off by
releasing the screws p¹ and in order to clean the contrivance the plates are turned
till the cut u makes contact with the screws so that the plate e¹ may now be
elevated.
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) A die stock consisting of a frame a having handles b and a top and bottom
plate e, el which are detachably combined and may be turned together said plates
engaging the dies d enclosed in the frame by means of excentric slots k and studs l
projecting from the dies upwards and downwards as and for the purpose described
and as shewn in the drawing.
2) In combination with a die stock hereinbefore described and illustrated
an attachment for guiding the stock consisting of a bridge p fastened to the die
stock and having guided in a hevilled groove q dies which are adjusted by an
excentrically slotted disk s and studs tas and for the purpose described and set
forth in the drawing.
100
1000
CARL BLOMBACH AND
HUGO BLOMBACH.
By A. Daumas,
Agent for Applicants.