Improvements in Work-holders for Clamping Devices.
Year: 1893

page_text: Date of Application, 4th Apr., 1893-Accepted, 6th May, 1893
COMPLETE SPECIFICATION.
Improvements in Work-holders for Clamping Devices.
We HENRY BINSSE and JOHN PETER HAUSCHILD of 212, Passaic Avenue,
Newark in the County of Essex and State of New Jersey, United States of
America, 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 :-
This invention relates to improvements in work holders for clamping devices, in
which a pair of holding jaws are united by one or more flexible strips of suitable
spring material.
A practical embodiment of this invention is represented in the accompanying
drawings, in which
Fig. 1 represents the holder as it appears in connection with the jaws of a vice,
when the latter are open to receive a piece of work.
Fig. 2 represents the position of the holder with respect to a piece of round
work, when the jaws of the vice have been forced toward each other to clamp the
work; and
Fig. 3 is a view of the holder in side elevation.
The particular form of holder which is selected for the purpose of illustrating
this invention, is that adapted to use in connection with the jaws of an ordinary
vice, and the number of flexible strips employed for uniting the jaws, is here shown
as two, one at each end of the jaws.
While we prefer this number of connections, and their arrangement substantially
as shown herein, it is obvious that one flexible connection, centrally located, might
be employed, and also that three or more such connections might be employed, if
so desired.
The jaws of the work-holding device are represented respectively by A and A';
they are each provided, on their upper, outer edges, with outwardly projecting
flanges a and a¹, for conveniently supporting the holding jaws in the proper vertical
adjustment with relation to the vice jaws B B¹.
The bodies of the jaws A. A' may be formed of any suitable metal, such, for
example, as iron or steel, but their holding faces, particularly where fine work is to
be held, should be made of some material which is not liable to bruise or injure the
held work. We find it desirable to employ, for this purpose, what is commonly
termed "vulcanized fibre," and we have shown, in connection with the jaws A A¹,
facings C C¹ of such material.
The flexible strips which connect the two jaws are represented by D and D', and
consist, in the present instance, of flat strips of spring steel bent into a general
U-shaped form, with their ends secured firmly to the opposite jaws. It is intended
that the tension of the spring strips D D¹ shall be such as to press the jaws A
and A normally away from each other, so that as the jaws of the vice are opened,
the work-holding jaws will have a tendency to follow their opening movements, and
rest against their faces in position to receive the work between them.
As the jaws of the vice are closed to clamp the work between the jaws of the
holder, the flexible connections D and D' will spring outwardly into the position to
permit the jaws A and A¹ to apply themselves squarely to the opposite sides of the
work to be held, as represented in Fig. 2. Such movement of the flexible spring
connections will not exert any undue strain upon them, as they will readily adapt
themselves to any ordinary tilting of the jaws A and A', that may be required,
either outwardly or inwardly, to adjust the jaws squarely to the sides of the work.
There will therefore be no liability of breakage, which often happens in connection
with rigid cast metal connections, and at the same time the connections may be

page_text: made very light, embodying in themselves the double function of holding the jaws A
and A¹ in position relatively to each other, and exerting upon them a tendency
to open.
Having now particularly described and ascertained the nature of the said inven-
tion and in what-manner the same is to be performed, we declare that what we
claim is :-
९
1. A pair of work-holding jaws fitted to be received between the jaws of a vice,
the said work-holding jaws being united by one or more flexible strips of spring
material, substantially as set forth.
2. A pair of work-holding jaws provided with projections for supporting them
between the faces of a pair of vice jaws, said holding jaws being united by one or
more flexible strips of spring material, said uniting strips having a normal tendency
to separate the jaws, substantially as set forth.
Dated this 29th day of March 1893.
NEWTON & SON,
Agents for Applicants.