Improvements in and relating to Two Jawed Chucks
Year: 1893

page_text: Date of Application, 27th Feb., 1893
Complete Specification Left, 25th Nov., 1893-Accepted, 30th Dec., 1893
:
PROVISIONAL SPECIFICATION.
Improvements in and relating to
Two Jawed Chucks."
JOHN BERNARD CLIVE 338 Summer Lane Birmingham Engineer do hereby
declare the nature of this invention to be as follows:-
This invention relates to that class of chuck having two jaws, and consists in
providing the nuts which operate the jaws (by means of a right and left handed
screw spindle) with projections which engage with a slot in the ends of the jaws,
or I may provide the nuts aforesaid with slots, and cause projections upon the
jaws to engage in the slots in the nuts. These nuts have "wings" or bosses which
engage in slots in the ends of the jaws which are pivoted about their centres to
the forkes of a bifurcated piece. The object of the slots or projections on the
nuts is to prevent same from revolving or partly revolving, when the aforesaid screw
spindle is operated. If desired I may provide a spring in order to open the jaws.
I also slot the ends of the jaws which hold the work, so that a false nose may be
attached thereto by means of a screw & plate." Any convenient shape of false
nose may be employed. I find it most convenient to provide the slots at right
angles to one another & enlarged to admit of the entrance of the screw plate. I
may also secure the false nose by means of a bolt and nut working in one of the
aforesaid slots.
"
Dated this 27th day of February 1893.
E. EATON,
Agent for Applicant.
COMPLETE SPECIFICATION.
Improvements in and relating to "Two Jawed Chucks."
I, JOHN BERNARD CLIVE 338 Summer Lane, Birmingham Engineer, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement :-
"
This invention relates to that class of chuck having two jaws, and consists in
providing the nuts which operate the jaws (by means of a right and left hand
screw spindle) with projections which engage with a slot in the ends of the jaws, or
I may provide the nuts aforesaid with slots and cause projections upon the jaws to
engage in the slots in the nuts. These nuts have "wings or bosses which engage
in slots in the ends of the jaws which are pivoted about their centres to the forkes
of a bifurcated piece. The object of the slots or projections on the nuts is to
prevent same from revolving or partly revolving when the aforesaid screw
spindle
is operated. If desired I may provide a spring in order to open the jaws. I also
slot the ends of the jaws which hold the work, so that a false nose may be attached
thereto by means of a "screw plate."
Any convenient shape of false nose may be employed. I find it most convenient
to provide the slots at right angles to one another & enlarged to admit the entrance
of the screw plate. I may also secure the false nose by means of a bolt and nut
working in one the aforesaid slots.
Referring to the annexed drawings
Figure 1 is a side elevation of a chuck constructed according to my invention.
Figure 2 plan view of same.
T2 and sirm of cama

page_text: d are
a, a are the two jaws of the chuck pivoted at b to the bifurcated piece c.
the nuts operating the jaws a through the medium of the right & left handed
screw'e. These nuts have "wings" or bosses f engaging in slots in the end of the
jaws a, and also the projections a engaging in the recesses or slots in the jaws a.
i is a key for operating the spindle e. l, l, are the false nose pieces secured to the
jaws a by means of bolts or screws m engaging in the plates n which engage in
slots o.
In Figures 4 & 5 a modified form of nose piece is shown for attachment
to the jaws as before.
Having
now particularly described and ascertained the nature of my inven
tion & in what manner the same is to be performed I declare that what I
claim is:-
1. In two jawed chucks, the combination and arrangement of the various parts
substantially as described and shown herein.
E
2. In chucks of the class herein described, nuts for operating the jaws having
wings or bosses engaging in slots in said jaws; false nose pieces secured to said
jaws by means of plates engaging in recesses or slots in said jaws, the nose pieces
being secured thereto by means of screws or bolts.
✓ Dated this 25th day of: November 1893 .