IMPROVEMENTS IN JAWS & JAW PLATES FOR MACHINE AND OTHER VICES, AND JAWED CHUCKS
Year: 1884

page_text: I, GEORGE BENJAMIN TAYLOR of 155 St Lukes Rd Edgbaston Birmingham,
Machinist, do hereby declare the nature of my invention for IMPROVEMENTS IN
JAWS & JAW PLATES FOR MACHINE AND OTHER VICES, AND JAWED CHUCKS; to be
as follows:-
My invention consists of improvements in the jaws of vices and chucks, (being
however more applicable to machine vices,) and the plates fastened thereto by
means of which improvements an article held between the said jaws is pressed
down upon the surface of the vice or chuck uniformly, at the same time that it is.
tightened between the jaws This is accomplished by making that face of each jaw
to which the plate is attached an inclined plane the upper edge of the said plane
being nearer to the opposite jaw than its lower edge, also by making that face of
each plate which is attached to the said inclined surface of the jaw to correspond
with it and be free to slide thereon in the direction of its inclination for a certain
limited distance. The other surfaces of the plates are made as usual. The aforesaid
plates may be fastened to the jaws by pins passing through holes slotted in the
direction of the inclined surfaces or the said plates may be dovetailed within or
upon the jaws or may be attached thereto by other suitable means, I also claim
the use of a spring or springs to raise the said plates up the inclined faces of the
jaws which spring or springs may be placed in any convenient position in connection
with the plates to effect this purpose. By means of these improvements any article
gripped between the jaws of a vice or chuck made as above described will by its
pressure upon the above described inclined surfaces cause the aforesaid plates and
with them the article itself to move downwards until the said article comes into
uniform contact with the face of the vice or chuck or in contact with pieces of
metal placed upon the face of the vice or chuck for that purpose. When the article
is withdrawn from the jaws the above-mentioned springs cause the plates to move
upwards again to their original position. All the above described improvements
may be attached to any existing vice or jawed chuck.

page_text: Vices and Jawed Chucks.
I, GEORGE BENJAMIN TAYLOR, Machinist, Edmund Street Birmingham do
hereby declare the nature of my invention for IMPROVEMENTS IN JAWS AND JAW
PLATES FOR MACHINE AND OTHER VICES AND JAWED CHUCKS and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement :-
My Invention consists of Improvements in the jaws of vices, see Figs. 1 and 2
and jawed chucks see Figs. 3 and 4; being however more applicable to machine
vices and the plates fastened thereto, by means of which Improvements an article
held between the said jaws is pressed down upon the surface of the vice or chuck
uniformly, at the same time that it is tightened between the jaws. This is accom-
plished by making that face of each jaw to which the plate is attached, an inclined
surface, either flat as shown, or curved; the upper edge see AA of the said surface
being nearer to the opposite jaw than its lower edge, see BB, also making that face
of each plate, see CC Figs. 2 and 4 which is attached to the said inclined surface
of the jaw to correspond with it and be free to slide thereon in the direction of its
inclination for a certain limited distance. The other surfaces of the plates are
made as usual. The said plates may be fastened to the jaws by pins, the beads of
which pins may be let into the plates as usual, in which case the holes in the plates
are slotted and the pins screwed into the jaws, but preferably, I so bore the holes
for the pins D D that their heads may be at the back of each jaw and in this case
the holes in the jaws are slotted and the other ends of the pins screwed into the
plates as shown, by this means cutting away less of the toothed surface of the plate
than by the first mentioned method. Between the underside of the head of each
of the said pins and the shoulder formed by the bottom of the hole cut in the jaws
for the reception of the said pin head, I place a small spiral spring E E for the
purpose of producing an elastic pressure between the inclined faces before described
of the jaws and jaw plates, the object of which is to prevent dust &c from entering
between the said faces and to still allow a free sliding movement between them.
Or instead of using pins for the purpose of attaching the plates to the jaws, the
said plates may be dovetailed within or upon the jaws or may be attached thereto
by other suitable means. I also claim the use of a spring or springs H H to raise
the aforesaid plates up the inclined faces of, the jaws which spring or springs may
be placed in any convenient position in connection with the plates to effect this
purpose, but preferably beneath the jaw as shown. By means of these improve-
ments any article gripped between the jaws of a vice or chuck made as.
described will by its pressure upon the above described inclined surfaces cause the
aforesaid plates and with them the article itself to move downwards until the said
article comes into uniform contact with the face of the vice or chuck, or in contact
with pieces of metal placed upon the face of the vice or chuck for that purpose.
When the article is released from the jaws, the above mentioned springs beneath
the jaw plates cause the plates to move upwards again to their original position.
above

page_text: In my drawings I have shown the above described improvements attached to a vice
and chuck previously patented by me No 6964 of 1884, but all the above described
Improvements may be applied to any existing vice or jawed chuck and in the case
of vices having their jaws pivoted at the back on a horizontal pivot above the level
of the jaws, springs as H H may be used to slightly raise.the front of the jaws
themselves from the surface of the vice, so that on gripping an article the jaws will
move slightly downwards and carry the article with them, thus obtaining the same
result as by the sliding jaw plates previously described, which in this case need not
be used.
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
1st The use of inclined surfaces on the jaws and jaw plates of vices and jawed
chucks, the said surfaces being either flat or curved and so arranged as to allow of
a free sliding movement between them, substantially as herein before described.
2nd The use of springs to raise the aforesaid plates up the inclined surfaces of
the jaws. I also claim the use of springs to raise the front of the jaws of vices
having their jaws pivoted at the back, substantially as hereinbefore described.
3rd The use of springs beneath the heads of pins used for attaching, the jaw
plates to the jaws, the said springs and pins to move together in a slotted hole,
substantially as herein before described.
HAAR