Improvements in Vices.
Year: 1891

page_text: Date of Application, 24th Apr., 1891
Complete Specification Left, 15th Jan., 1892-Accepted, 20th Feb. 1892
PROVISIONAL SPECIFICATION.
Improvements in Vices.
I, OWEN ROBINSON, of the Champion Machine Works, Victoria Street.
Kettering, in the County of Northampton, Engineer, do hereby declare the nature
of this invention to be as follows:-
My invention relates to that class of vices known as parallel vices.
According to my invention the screw, which extends through the movable
portion of the vice and engages with a half nut in the fixed portion, is carried in
bearings suspended from arms projecting from a shaft also carried in the movable
portion in such a manner that when the said shaft is moved upon its axis, the said
screw will be raised horizontally above the nut so that the movable part of the vice
can be adjusted in a well known manner.
In order to prevent the screw from slipping out of the nut, when great pressure
is applied to the screw, I provide a cap adapted to bear upon the screw, the said
cap being carried by arms upon the shaft in such a manner that, when the screw is
lowered into the nut, the said cap will lie between the screw and the shaft and bear
with its upper surface against the latter, thereby preventing the screw from lifting.
Above the shaft, at that part where the cap is carried, are placed supports to
prevent the said shaft from bending.
Dated the 24th day of April 1891.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Vices.
I, OWEN ROBINSON, of the Champion Machine Works, Victoria Street,
Kettering, in the County of Northampton, 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 :-
My invention relates to that class of vices known as parallel vices.
According to my invention the screw, which extends through the movable portion
of the vice and engages with a half-nut in the fixed portion, is carried in bearings
suspended from arms projecting from a shaft also carried in the movable portion
in such a manner that, when the said shaft is moved upon its axis, the said screw
will be raised horizontally above the nut so that the movable part of the vice can
be adjusted in a well known manner.
In order to prevent the screw from slipping out of the nut, when great pressure
is applied to the screw, I provide a cap adapted to bear upon the screw, the said cap
being carried by arms upon the shaft in such a manner that, when the screw is
lowered into the nut, the said cap will lie between the screw and the shaft and
bear with its upper surface against the latter, thereby preventing_the_screw from
lifting. Above the shaft, at that part where the cap is carried, is placed a support
to prevent the said shaft from bending.
To enable my invention to be fully understood I will describe the same by
reference to the accompanying drawings, in which :-
Figure is a side elevation of a vice having my improvements applied thereto;
and,
Figure 2 is a longitudinal section of the same

page_text: Figure 3 is an end view of the vice; and,
Figures 4 and 5 are sections on the lines x and y y respectively of Figure 2.
a indicates the fixed portion of the vice which is secured to the base-plate b and
has the fixed jaw a¹, and is the movable jaw which is formed integral with the
recessed bar d, sliding in a socket or guide in the fixed portion a. e is the
adjusting screw located in the recess in the bar d, and f, f are the bearings in which
the same is carried, the said bearings being suspended from lugs or arms g, g keyed
to the shaft h, the said shaft being adapted to partially rotate in bearings in the
movable part of the vice and provided at the front end with a lever i for operating
the said shaft. j is the half-nut with which the adjusting screw e engages, the said
half-nut being firmly secured to the base-plate 6 of the vice, so that the rotation of
the said screw causes the movement of the jaw c towards or away from the jaw a.
kis the cap designed to bear upon the upper surface of the screw to prevent the
same from slipping out of engagement with the screw-threads in the half-nut. This
cap is suspended between arms, similar to the arms g, g and also secured to the
shaft and adapted to move therewith. m is the support to prevent the shaft h
from bending, the said support being formed in the recess in the bar d.
With this construction it will be understood that, when the lever i is lifted to the
position indicated by the dotted lines in Figure 3, the screw e will be lifted so that
its threads will be out of engagement with the half-nut j, whereby the movable
jaw c of the vice can then be moved freely backwards and forwards according to the
size of the object or article to be introduced. After the article is placed between
the jaws, the movement of the lever i (from the position shewn in dotted lines in
Figure 3 to the position shewn in full lines in the said figure and also in Figures 1.
2 and 4) lowers the screw e so that it engages with the threads in the half-nut;
the cap
kis at the same time brought vertically over the screw e in the position
shewn most clearly in Figures 4 and 5, the axis of its joint with the arms / being in
a line drawn through the axes of the shaft h and the screw e. A slight rotation of
the said screw then serves for firmly clamping the article between the jaws. The
bearings have their pivots similarly arranged to those of the cap k in order that
when the screw e is in its lower position, it is practically locked.
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 parallel vice mounting the adjusting screw in bearings which may be
moved to disengage the screw from the half-nut, substantially as, and for the
purpose, described.
2. In a parallel vice the adjusting screw of which is mounted in movable
bearings, the employment of a cap designed, when the vice is screwed up, to bear
upon the upper surface of the screw and so prevent the latter from becoming
disengaged from the half-nut, substantially in the manner described.
3. The manufacture and use of a parallel vice, substantially as hereinbefore
described and illustrated in the accompanying drawings.
Dated the 15th day of Ionowy 1000
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.