IMPROVE- MENTS IN LATHE CHUCKS to be as follows:-
Year: 1884

page_text: I JOHN CHARLES BAUER, of 11 Comerford Road, Brockley in the County of
Kent, Engineer do hereby declare the nature of the said invention for "IMPROVE-
MENTS IN LATHE CHUCKS to be as follows:-
"
This invention relates to improvements in lathe chucks.
In carrying out my invention I employ three or more suitably shaped cams
provided with roughened edges and turning on pivots fixed to the face plate or the
like part of a lathe in such a manner that when the article to be turned or bored is
placed between the said cams and each of them is brought into contact therewith
by being simply turned on its pivot, the said article is firmly held in its position by
them and made to revolve in the right direction without having to use adjusting
screws, sliding jaws or other more complicated means of holding the same.
Deted the 9th do of Cantamhan 700A
G. F. REDFERN,
4, South Street, Finsbury, London,
Agent for the Applicant.

page_text: I JOHN CHARLES BAUER of 11 Comerford Road, Brockley in the county of
Kent, Engineer do hereby declare the nature of the said invention for "IMPROVE-
MENTS IN LATHE CHUCKS" 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 lathe chucks.
In carrying out my invention I employ three or more suitably shaped cams
or eccentrically placed arms provided with cams having roughened edges and
turning on pivots fixed to a face plate or to the like part of a lathe in such a
manner that when the article to be turned or bored is placed between the said cams
or arms and each of them is brought into contact therewith by being simply turned
on its pivot the said article is firmiy held in its position by them when the lathe
is worked without having to use adjusting screws, sliding jaws or other more
complicated means of holding the same the rotation of the chuck in the lathe
causing the jaws of the cams or eccentric.arms to close tightly on the article held
in the chuck.
In order to enable my invention to be fully understood I will proceed to describe
the same by reference to the accompanying drawing in which figure 1 is a front
elevation and figure 2, a plan of a lathe chuck constructed according to my
invention when cams are employed and figures 3, and 4, are similar views to
figures 1 and 2, but shewing the lathe chuck formed with eccentrically placed arms
having cams. Similar letters in all the figures represent similar parts.
a, is a face plate and b, b, b, in figures 1 and 2, represent the cams and in figures 3
and 4, the eccentrically placed arms carrying cams d; c, c, c, shew the roughened
edges of the cams; these cams d, in figures 3 and 4, form claws or projections as
shewn; c, c, are the pivots on which the cams or arms b, turn. By turning the
cams or eccentrically placed arms b; the serrated or roughened edges c, thereof can
be brought nearer or fartlier from the centre of the face plate a, as illustrated by
the dotted lines in figures 1 and 3, so as to allow of articles of various sizes being
held by the chuck.
In some cases I employ suitable gearing such for example as toothed pinions on
the pivots e, e, behind the face plate so as to cause the cams or arms to turn and
act in unison.
ff, are screw nuts on the pivots e, e, to allow of clamping the cams or arms.
By this construction of chuck it will be obvious that to fix an article in the
chuck it is merely necessary to turn the cams or arms b, b, on their pivots and then
to place the article in the centre and on turning the cams or arms inwardly they
will firmly hold the article, and the rotation of the lathe in the direction for turning
will keep the cams or arms gripped against the article or the cams or arms may be
clamped in position by means of their nuts.
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 lathe chuck having a number of cams or eccentrically placed arms
carrying cams arranged on a face plate and adapted to receive and hold firmly in

page_text: position the articles to be turned or bored without the use of adjusting screws,
sliding jaws or the like substantially as hereinbefore described.
(2). A lathe chuck constructed in such a manner that the rotation of the chuck
in the lathe will effect the gripping of the jaws on the article held in the chuck
substantially as herein before described.
(3). The improved lathe chucks herein-before described and represented in the
accompanying drawing.