Year: 1894

page_text: I, HANS SCHWARZ, of Bassersdorf, in the Republic of Switzerland, Engineer, do
hereby declare the nature of this invention to be as follows:-
This invention relates to that class of vices known as parallel vices which can be
rapidly and easily closed and opened and which grip the material to be worked
vertically.
My improved parallel vice has a fixed casing or body cast with the fixed jaw and
in which slide two rack bars engaging with teeth on a casting bolted to the fixed
casing and carrying the movable jaw which is moved for long adjustments toward
and away from the fixed jaw by inclining the rack bars to disengage them from the
teeth. The movable jaw slides upon these rack bars and is caused to advance or
be withdrawn for short adjustments by turning, by means of the vice-handle, a
screw engaging with the movable jaw and journalled in a bearing carried by the
rack bars.
By means of these rack bars which can be disengaged and then moved freely
backwards or forwards and also by means of the screw the piece of work can be
rapidly clamped between the jaws of the vice.
Dated the 22nd day of September 1894
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
I, HANS SCHWARZ, of Bassersdorf, in the Republic of Switzerland, Engineer, 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:
This invention relates to that class of vices known as parallel vices which can be
rapidly and easily closed and opened and which grip the material to be worked
vertically.
My improved parallel vice has a fixed casing or body cast with the fixed jaw
and in which slide a pair of rack bars engaging with teeth on a casting bolted to
the fixed casing and carrying the movable jaw which is moved for long adjustments
toward and away from the fixed jaw by inclining the rack bars to disengage them
from the teeth. The movable jaw slides upon these rack bars and is caused to
advance or be withdrawn for short adjustments by turning, by means of the vice-
handle, a screw working in the movable jaw and journalled in a bearing carried by
the rack bars.
By means of these rack bars which can be disengaged and then moved freely
backwards or forwards and also by means of the screw the piece of work can be
rapidly clamped between the jaws of the vice.

page_text: To enable my invention to be fully understood I will describe how it can be
carried into practice by reference to the accompanying drawing, in which :-
Figure 1 is a side elevation, partly in section, of a parallel vice constructed
according to my invention:
Figure 2 is a plan of the same, partly in section :
Figure 3 is a front elevation of the moveable jaw; and,
Figure 4 is an elevation of the face of the fixed jaw :
Figure 5 is a side elevation shewing the rear end of one of the rack bars; and,
Figure 6 is a horizontal section of the rear end of the pair of rack bars.
B is the fixed casing or body and G is the fixed jaw of the vice cast therewith;
A, A are the pair of rack bars adapted to slide in passages or guides in the casing
or body B D is the body of the movable jaw G arranged to slide on the said rack
bars; C is the casting bolted to the fixed casing B and having the teeth Z, Z¹
thereon with which the rack bars A, A engage.
E is the screw operated by the vice handle H for causing the moveable jaw G₁
to slide along the rack bars A, A. the said screw to this end working in the body D
of the moveable jaw, as in a nut, and being journalled in the bearing F carried by
the rack bars.
For long adjustment the rack bars A, A are inclined so as to lift them from
engagement with the teeth Z' (the front and rear ends respectively of the top and
bottom portions of the rack guides being inclined towards the middle of their
length as shewn by the dotted lines in Figure 1 to allow of this being done) and
slid in or out according to whether the jaws of the vice are to be brought nearer to
or farther from each other and then dropped into re-engagement with the teeth Z'.
For short adjustment, as already described, the vice handle H is made use of to
rotate the screw E and cause the movable jaw G' to advance or retire along the
rack bars.
Having now particularly described and ascertained the nature of iny said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. A parallel vice having its movable jaw adapted to be slid along rack bars
sliding in guides in the body of the fixed jaw the said rack bars engaging with
teeth on the said body, substantially as and for the purposes set forth.
2. The improved parallel vice herein before described and illustrated in the
accompanying drawing.
Dated the 7th day of June 1895
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.