Adjustable Eccentric.
Year: 1892

page_text: Date of Application, 15th Jan., 1892
Complete Specification Left, 13th Oct., 1892-Accepted, 17th Dec., 1892
PROVISIONAL SPECIFICATION.
Adjustable Eccentric.
I, WILLIAM GEOFFREY GOOD ACRE of 18 Swinley Road, Wigan in the County
of Lancaster, Mechanical Engineer do hereby declare the nature of this invention
to be as follows:-
A combination of two eccentrics, one placed inside the other, keyed together so
as to act virtually as one eccentric. The key, or keys, by which the eccentrics are
keyed together, are to allow of being taken out and the positions of the eccentrics,
with respect to one another, changed so as to make the arrangement capable of
giving any amount of motion not greater than twice the total eccentricity of the
two eccentrics.
Dated this 14th day of January 1892.
COMPLETE SPECIFICATION.
Adjustable Eccentric.
I, WILLIAM GEOFFREY GOODACRE, of 18 Swinley Road, Wigan in the County
of Lancaster, Mechanical Engineer 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:-
The combination of two eccentrics, one placed inside the other secured together
by a key, setscrew, pin or other convenient fixing, or fixings, so as to act virtually
as one eccentric as illustrated in the accompanying drawings.
The key or other suitable fixing (or fixings), by which the eccentrics are secured
together, is to admit of being taken out, or slackened, so as to allow of the positions
of the eccentrics, with respect to one another, being changed in order to make the
arrangement capable of transmitting any amount of motion not greater than twice
the total eccentricity of the two eccentrics.
In the accompanying sheet of drawings
Fig. 1 represents arrangement in position for giving maximum throw.
Fig. 2 represents arrangement in position for giving minimum throw, in which,
in the case of the throws of the outer and the inner eccentrics being equal they
would exactly oppose each other and the centre of the outer eccentric would
coincide with the centre of the shaft, as in the drawing, and therefore there would
be no throw at all.
Fig. 3 is a sectional plan of Fig. 1 showing the arrangement secured together by
a tapered key held in position by a nut.
Fig. 4 is a sectional plan of Fig. 2 showing centre line of outer eccentric
coinciding with centre line of shaft.
A. Shaft, to which eccentric is keyed.
B. Inner eccentric.
C. Outer eccentric.
D. Tapered key for securing together B. and C.
E. Key for securing eccentric to shaft.
F. Keyways, cut in outer edge of inner eccentric B, for reception of tapered
key D.
G. H. Centre line of shaft A, or centre line of motion.
I. J. Centre line of inner eccentric.
K. L. Centre line of outer eccentric

page_text: Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
:―
The combination of two eccentrics in one so as to form an adjustable eccentric
substantially as described and illustrated in the accompanying sheet of drawings.
Dated this 12th day of October 1892. ·
WILLIAM GEOFFREY GOODACRE,
Applicant.