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Патент USA US2123131

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July 5, 1938-
Filed , Jan. 25, 195'?‘
wanna -.IIImun
M . Z uge/"mayer
Patented July 5, 1938
Melmore Zugermayer, Southampton, Pa.
Application January 25, 1937, Serial No. 122,283
1 Claim. (Cl. 81-38)
The invention relates to a bench vise attach
ment and more especially to a jaw assembly for
bench Vises.
The primary object of the invention is the pro
5 vision of an attachment of this character, where
in a four-jaw assembly can be used in connec
tion with the bench vise so that work can be
gripped or clamped at four points thereof to hold
The attachment comprises a bed plate 8 pref
erably of ?at sided formation having the beveled
corners 9 while centrally of this plate is a rela
tively large square shaped opening it while at
one side edge of the said plate is an outwardly
Above the bed plate 8,,are arranged the op» 10
posed equilateral triangular shaped jaw sections
I2 and I3, respectively, these being in pairs and
the same is susceptible of use in a horizontal
plane or in a vertical position when associated
with a bench vise so that work can be ?rmly and
I2 are downwardly extended abutment wings I5,
these being bent at right angles from the inner 15
A further object of the invention is the provi
sion of an attachment of this character, which
in the assembly thereof is a unit in itself and
is readily and easily applied to a bench vise for
use therewith and in this manner converting the
25 latter from a two-jaw to a four-jaw vise.
A further object of the invention is the pro
vision of an attachment of this character, which
is simple in its construction, thoroughly reliable
and e?icient in operation, strong, durable, and
30 inexpensive to manufacture.
With these and other objects in view, the in
vention consists in the features of construction,
combination and arrangement of parts as will be
hereinafter more fully described, illustrated in
35 the accompanying drawing, which discloses the
preferred embodiment of the invention and point
ed out in the claims hereunto appended.
In the accompanying drawing:
Figure 1 is a plan view of the attachment con
40 structed in accordance with the invention.
Figure 2 is a sectional view on the line 2--2
of Figure 1 looking in the direction of the arrows
and showing the attachment in a vise.
Figure 3 is a sectional view on the line 3--3
45 of Figure 1 looking in the direction ‘of the arrows.
Figure 4 is a fragmentary sectional view on
the line 4--4 of Figure 1 looking in the direction
of the arrows.
Similar reference characters indicate corre
50 sponding parts throughout the several views in
the drawing.
Referring to the drawing in detail, A desig
nates generally a conventional type of bench vise
is usual.
the work more ?rmly and securely and avoiding
damage thereto resultant in the clamping of such
work in the double jaw vise of the bench type.
Another object of the invention is the provi
sion of an attachment of this character, wherein
securely held without liability of the shifting or
Wobbling of such work when engaged in the at
the adjustable jaw 6 being moved toward and
away from the ?xed jaw by a feed screw ‘I as
having the ?xed and adjustable jaws 5 and B,
respectively, and operating opposite each other,
tapered centrally located extension I I.
extended from the ?at bottoms I4 of the sections
edges of said sections I2 and are passed through
the opening II] in the bed plate 8. The wings I5
at opposite ends are carried beyond the opening
If! in the bed plate 8 while one of the sections I2
is riveted at I6 or otherwise made fast ‘to the 20
bed plate 8 while the other section is slidable
upon said bed plate and to the slidable section
I2 is connected at its longitudinal center a coiled
retractile spring I‘! which is also ?xed at I8 close
to the outer end of the extension II, the spring 25
being designed to separate the sections I2 from
each other to the extent of the opening It.
The sections I2 and I3 at the diagonal edges
thereof are formed with upturned ?anges I9 and
the said ?anges on the sections I3 at their‘ inner 30
ends meet each other while the ?anges I9 on
the sections I2 at their inner ends are separated
from each other.
The ?anges I9 on the sections I2 are formed
with guides 20 with which are inter?tted the 35
?anges IQ of the sections I3 and such ?anges of
both sections I2 and I3 constitute a four-jaw
assembly for, attachment to the vise A.
In the attachment of the four-jaw assembly,
the wings I5 are inserted between the jaws 5 of
said vise A with the wing on the ?xed section I2
contacting with the ?xed jaw 5 of said vise while
the wing on the slidable section I2 contacts with
the adjustable jaw I6 and thus on the turning
of the screw ‘I the slidable section I2 and the 45
sections I3 will become adjusted relative to the
?xed section I2 for increasing or decreasing the
capacity of the four-jaw assembly for the ?rm
securing of Work within said assembly so that the
work will be clamped at four points thereof or 50
at four sides or faces of the same.
When the adjustable jaw B of the vise is moved
away from the ?xed jaw 5, the spring I‘! by its
tension becomes active to have the slidable sec
tions I2 of the assembly separate and thus the
wings l5 of these sections [2 will be held in con
tact with the jaws of the vise A while the sec
tions 13 slidably inter?tted with the sections l2
will open correspondingly with the said sections
What is claimed is:
A jaw assembly for a vise having a ?xed jaw
and a movable jaw, comprising opposed equilat
eral substantially triangular shaped sections, each
10 having an upturned outer edge ?ange, a flat sided
bed plate having the: said sections superimposed
thereon and provided with beveled corners and
a relatively large square shaped center opening,
an outwardly tapered extension formed on said‘
bed plate, a coiled retractile spring having con
nection with said extension and one of the sec
tions, guides formed on the outer edge ?anges
of a pair of the opposed sections and adjustably
inter?tting the ?anges of the remaining opposed
sections for e?ecting a four-jaw assembly, and
downwardly extending abutment wings engaged
through the center opening of the bed and for
contact with the jaws of the vise when interposed
therebetween, one wing being carried by the sec
tion having'the. spring attached thereto and the
other wing carried by the section opposed thereto.
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