Improvements in Vises.
Year: 1891

page_text: Date of Application, 10th Nov., 1891-Accepted, 16th Jan. 1892
COMPLETE SPECIFICATION.
Improvements in Vises.
I, FRANCIS GORDON BATES, of 2005, North College Avenue, in the City
of Philadelphia, State of Pennsylvania, United States of America, Mechanical
Engineer, do hereby declare the nature of the said invention and in what manner
the same is to be performed to be particularly described and ascertained in and
by the following statement
The object of this invention is to so construct a vise as to provide for the rigid
and secure clamping of the object between the jaws of the vise.
In the accompanying drawings:-
Figure 1, is a side view, partly in section, of a vise constructed in accordance
with the invention;
Figure 2, is a sectional view of the lower portion of the vise, showing some of
the
parts in a different position from that represented in Figure 1;
Figure 3, is a front view of part of the lower portion of the vise;
Figure 4, is a sectional view on the line 1-2, Figure 1.
Figure 5, is a side view, partly in section, of another form of vise embodying the
invention;
Figure 6, is a side view, partly in section, of a third form of the vise; and
Figure 7, is a sectional plan view of the vise shown in Figure 6.
A, and B, represent the two legs of the vise which, at their upper ends, are
provided, respectively, with the clamping jaws a, and b, the legs of the vise being
pivoted together at their lower ends by a transverse pin d, which passes through
openings in the forked lower end B¹, of the leg B, of the vise and through slots
in arms, projecting forward from the lower end of the leg A, of the vise, said
pin d, having, at its opposite ends, heads d', to prevent lateral displacement, and
said pin also carrying or having mounted upon it, a cam lever D, which has a
bearing upon the lower end of the leg A, of the vise, as shown in Figure 1.
The upper portion of the leg A, of the vise shown in Figure 1, has formed in it
a slot which is crossed by a transverse pin g, and to this pin is hung one end of a
rod F, the other end of which passes through an opening in the upper portion of
the leg B, of the vise, and is threaded for the reception of a thumb nut G, which
has its bearing against the outer side of said leg B.
When the vise is not in use, the cam lever D, occupies the position shown in
Figure 2, the pivot pin d, being free to move in the slots f. The object to be
clamped is inserted between the jaws of the vise, and the nut G, is screwed up until
said object is lightly held between the jaws, the pivot pin d, at the lower end of the
vise being then at the inner end of the slots f. The cam lever D, is then depressed,
as shown in Figure 1, which has the effect of forcing apart the lower ends of the
legs A, B, of the vise, the leg A, acting as a lever which has its fulcrum at the
pivot pin g, of the rod F, so that the force of the cam D, plus the leverage thereby
gained, is exerted to close the jaws a, b, firmly upon the object to be held, thus
insuring the rigid retention of said object.
A spring I, secured at its lower end, to the leg A, of the vise and acting at the
upper end upon the leg B, serves to separate the jaws of the vise when the cam
lever D, is raised, or the nut G is slacked up, said spring having an opening through
which the rod F, passes.
In the vise shown in Figure 5, the rod F is rigidly secured to the leg A, of the
vise, and, in this case, the bearing of the nut G, upon the leg B, of the vise is such
as to constitute a fulcrum upon which said leg B, of the vise can swing when
subjected to the action of the cam lever D.
In the vise shown in Figures 6, and 7, the leg A, of the vise has, in the upper

page_text: portion, a socket for the reception of a cylinder g', which has a threaded opening
in it for the reception of the threaded portion of the rod F, which has a head G,
bearing upon the leg B, of the vise, so that said rod becomes a thumb screw for
closing the jaws of the vise, the cylindrical nut 9', serving as a fulcrum on which
the leg A, of the vise swings when subjected to the action of the clamping
lever D.
The nut g', is prevented from backing out of the socket in the leg A, by means
of pins m, which bear against the back of the nut as shown.
In some cases, the vise may have a projecting flange as shown by dotted lines
lines at i, in Figure 5, so as to provide for securing the leg A, of the vise to a table
or bench, and said leg A, of the vise may also, in some cases be provided with an
extension running down to the floor as shown by dotted lines in Figure 1.
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 vise having two legs with their clamping jaws, a screw and nut for drawing
the legs together so as to close the jaws, a pivot pin carried by the lower end of
one leg, and guided by the lower end of the other leg, and a cam lever hung to or
carried by said pivot pin and acting upon the other leg of the vise, substantially
as hereinbefore specified.
2. A vise having the two legs with clamping jaws at their upper ends, a rounded
nut seated in one of the legs of the vise, a set screw adapted to said nut and having
a bearing upon the other leg of the vise, and a cam lever whereby the lower ends
of the legs of the vise can be forced apart, substantially as hereinbefore specified.
Dated this 10th day of November 1891.
DAY, DAVIES & HUNT,
321, High Holborn, London, W.C., Agents for the Applicant.