Year: 1888

page_text: Date of Application, 13th Jan., 1888
Complete Left, 9th Apr., 1888
Complete Accepted, 11th May, 1888
I, SAMUEL WALKDEN of The Thorne, Bexhill in the County of Sussex, Gentleman'
do hereby declare the nature of this invention to be as follows:-
This eccentric is so constructed that its throw can be varied as desired and also its
angular position on the shaft. It is thus applicable for instance for slide valves and
other motor fluid admission and emission valves where the stroke has to be varied
according to the expansion desired and also the lead" or the angle which the
eccentric forms with the crank thus also facilitating reversing of motion. According
to this invention I fix on the shaft a disc which I call a carrier and I make the
eccentric in the shape of a ring or open worked or skeleton shaped having holes or
parts for applying bolts, screws or other suitable means for readily attaching it to
and detaching it from the carrier. The latter is formed with slots of such form as
to admit of the bolt or bolts being passed through any of them so as to admit of
adjusting and fixing the eccentric on the carrier according to the throw and angle
required. The slots may be slanting to or concentric with the shaft and carrier.
The eccentric rod is connected to the slide rod by right and left hand screw threaded
socket for the purpose of length adjustment.
n
11: 10:1 1
T. 1000

page_text: COMPLETE SPECIFICATION.
An Eccentric which is Adjustable as Regards Throw and Angle.
1, SAMUEL WALKDEN of The Thorne, Bexhill in the County of Sussex, Gentleman, 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:
This eccentric is so constructed that its throw can be varied as desired and also its
angular position on the shaft. It is thus applicable for instance for slide valves and
other motor fluid admission and emission valves where the stroke has to be varied
"
according to the expansion desired and also the " lead or the angle which the
eccentric forms with the crank thus also facilitating reversing of motion. According
to this invention I fix on the shaft a disc which I call a carrier and I make the
eccentric in the shape of a ring or open worked or skeleton shaped having holes or
parts for applying bolts, screws or other suitable means for readily attaching it to
and detaching it from the carrier. The latter is formed with slots of such form as
to admit of the bolt or bolts being passed through any of them so as to admit of
adjusting and fixing the eccentric on the carrier according to the throw and angle
required. The eccentric rod is connected to the slide rod by right and left hand
screw threaded socket for the purpose of length adjustment.
In the accompanying drawings Figure 1 is a front side elevation of an eccentric,
eccentric rod and carrier constructed according to my invention Figure 2 is a back
side elevation and Figure 3 a plan. Figure 4 is a section on line A B Figure 1.
A is the disc-shaped carrier which is fixed on the shaft B by keying or otherwise,
Cis the eccentric made in the shape of a ring provided with two holes for bolts D
with nuts whereby the eccentric is fixed to the carrier A. E E are sector shaped
slotted plates which are held to the carrier and against its centre boss by the same
bolts. The carrier is formed with slots F and G which may be of the form shown but
this is only as an example, as they will have to be varied in form and length according
to the varying requirements of expansion and lead. The eccentric rod H is made in
two parts having right and left hand screw thread and united by a socket nut 1 which
affords facility for length adjustment of the eccentric rod as required. The edge of
the carrier is provided with division notches and letters or numbers to indicato the
grade of expansion and forward and back gear of the engine, the edge or other
specially marked part of the plates E serving to set the eccentric to the required
division number or figure on the edge of the carrier.
Having thus particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what
1 claim is
First. The ring shaned or oven eccentric C in combination with the carrier A fixed

page_text: on the shaft B and provided with the slots F and G and the bolts D for adjustably
fixing the eccentric to the carrier A substantially as set forth.
Second. The ring shaped or open eccentric C in combination with the carrier A
fixed on the shaft and provided with the slots F and G, the holts D and the sector
shaped plates E for adjustably fixing the eccentric C to the carrier A which
is provided with marks for the purpose of accurate adjustment substantially as set
forth.