An Improved Riddle Working in a Vibrating Frame.
Year: 1890

page_text: Date of Application, 22nd July, 1890
Complete Specification Left, 22nd Apr., 1891-Accepted, 30th May, 1891
PROVISIONAL SPECIFICATION.
An Improved Riddle Working in a Vibrating Frame.
ISAAC DUNKLEY 10 St. Pauls Street, Stamford, in the County of Lincoln,
Baker, do hereby declare the nature of this invention to be as follows:-
-.
This invention is intended to apply to portable riddles adapted for riddling or
sifting sand, lime, feeding stuffs, or any other class of material required to pass
through a riddle or sieve. The riddle is carried in a vibrating frame working in
a rectangular or other shaped stand the vibrating frame being operated by a crank
shaft connected to it by means of a connecting rod or rods, the crank shaft having
one or more throws & being driven by hand, steam, or other power; the projecting
end of the crank shaft opposite the driving side carrying a balance or fly wheel.
Dated this 19th day of July 1890.
ISAAC DUNKLEY.
COMPLETE SPECIFICATION.
An Improved Riddle Working in a Vibrating Frame.
ISAAC DUNKLEY, 10 St. Pauls Street, Stamford Lincs. Shopkeeper 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:—
My invention relates to either portable or fixed riddles adapted for riddling or
sifting sand, lime, feeding stuffs or any other class of material required to pass
through a riddle or sieve. The riddle may be worked by hand, steam or other
power operating a crank shaft or disc with one or more throws, a connecting rod
or rods attaching the crank shaft or disc to a vibrating bar carrying a riddle,
such vibrating bar working on a rectangular or other shaped stand.
Fig. 1. is a side elevation and Fig. 2 is a plan view of my machine.
Fig. 3. is a detached view shewing another method of driving.
In the drawings A. is a rectangular bar forming a frame for the machine,
B represents four legs for supporting same, B 1 is an extension of one of the legs
for the purpose of carrying the two grooved pullies C and C 1 the latter having
a cranked arm fixed on same marked C2, D is the handle for giving motion
through the endless band D1 the pulley C 1 and the connecting rod E to a
vibrating bar F which travels in the path represented by the dotted lines in Fig. 2,
thus giving a vibrating or oscillating motion to the riddle or sieve G which fits
loosely into the casing H the latter being made secure to the bar F by the two
lugs H1 and H 2, I is a bracket carrying the pin J on which the bar vibrates.
When the arrangement as shewn in Fig. 3 is adopted the two pullies C and C 1
are taken off, and the spur pinion K. Fig. 3 is placed on the stud that carries the
pulley C1 and the vibrating lever L and segmental arm L 1 is pivotted on the
pin or stud M. Fig. 1. By moving the lever backwards or forwards the pinion K
and crank arm C2 are caused to rotate thus giving motion through the con-
necting rod E to the vibrating arm F. I would have it understood that I do not
confine myself to the particular methods shewn in the drawings for giving the
required vibration to the bar F as if desired other suitable mechanism may be
employed for obtaining such vibration, e.g. a foot treadle attached to the pulley C
by a suitable connecting rod, or two toothed wheels in place of the pullies C
and C 1.

page_text: Having now particularly described and ascertained the nature of my said
invention and the manner in which the same is to be performed, I hereby declare
that what I claim is
By suitable mechanism to give to a sieve or riddle a vibrating motion sub-
stantially as shewn and described.
Dated this Twenty-first day of April 1891.
ISAAC DUNKLEY.