Improved Adjustable Workholder for Turning Crank-shafts.
Year: 1898

page_text: Date of Application, 2nd Sept., 1898-Accepted, 5th Nov., 1898
COMPLETE SPECIFICATION.
Improved Adjustable Workholder for Turning Crank-shafts.
I, CARL ALEXANDER ADALBERT LIST, of Wiehe, Saxony, German Empire, Manu-
facturer, 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:.
-
My invention has reference to a lathe-heart for turning crank-shafts and it
consists more especially in the combination of parts, to be hereinafter fully des-
cribed and illustrated on the accompanying sheet of drawings Fig. 1 of which
shows a side elevation of the apparatus; Fig. 2 is a plan view of same, showing
the manner in which it is centred and placed upon the crank-shaft.
In the rounded off portion of the body A an oval opening a is provided, in
which the crank-shaft c is placed, which is then secured by means of the screw b.
In the other end of the body A. a longitudinal slot d is provided, in which the
squared head of a slide 9 can be moved laterally by means of the screw-spindle f,
the front end of which is revolubly secured in the body A. This slide 9 has a
longitudinal sloth rectangularly to the aforesaid slot d. Within this slot ha
slide-block k may be moved up or down by means of the screw-spindle i, the front
part of the said block k lapping over the edges of the slot h.
As can be seen the arrangement of the slides g and k is resembling the cross
slide of a lathe.
The screw spindle i is free to be rotated within the slide g without changing
its relative position, thereby raising or lowering the slide block k within and upon
the slotted slide g. The screw spindle i can be secured when the desired position of
the slide block k is attained, by means of the nut u. Upon the face side of the slide
block ka centring hole t is provided. The slide g threading upon the screw
spindle within slot d is secured in the desired position by means of a screw nut o.
The body A is adjusted parallel to the crank-cheek and the shaft c is then secured
by tightening screw b. The screw-spindles f, i respectively are now turned one
way or the other until the centring hole t falls exactly in line with the axis of
the crank pin m to be turned. Screw-nut o and screw u are tightened and the
center n of the turning lathe is introduced into the centring-hole t
Having now particularly described and ascertained the nature of my said in-
vention, and in what manner the same is to be performed, I declare that what I
claim is:
1/ An adjustable workholder, consisting of a body, within one end of which
the crank-shaft is secured by means of a screw and the other end of which carries
two slides, the one laterally and the other one vertically adjustable, which latter
is provided with a centring-hole, to be brought into engagement with the centre
of the turning lathe, as described.
2/ In an adjustable workholder in combination the body A, the heart-shaped
opening a, the screw b, the longitudinal slot d, a slide g, sliding in the said slot,
the screw nut o, the screw spindle f, a slot h, the screw spindle i, the nut u and

page_text: the slide-block k, threading upon the said screw spindle i and having a centring-
hole provided, the parts being arranged substantially as shown by the drawings
and specified.
Dated this 31st day of August 1898.
CARL ALEXANDER ADALBERT LIST.