A Grinding, Mixing, and Riddling Machine for Foundry Sands and other Material
Year: 1892

page_text: Date of Application, 16th Feb., 1892
Complete Specification Left. 8th Sept.; 1892-Accepted, 7th Jan., 1893
PROVISIONAL SPECIFICATION.
A Grinding, Mixing, and Riddling Machine for Foundry Sands and
other Material.
I, GUSTAVUS RUFUS of 26, Scholes Bank Horwich, near Bolton Lancashire
Foundry Manager do hereby declare the nature of this invention to be as
follows:-
The machine is for preparing facing and other sands, thus, red sand, road sand,
coal dust, and horse manure, with other material, are placed into a heap, and from
there they are thrown into the hopper A, and crushed between the fluted rolls B,
after which the sand drops into the barrel, and is mixed by the beaters C, which
are arranged to form a worm, to carry the sand, into the revolving riddle D, after
passing through the riddle, it falls into the pit E, and is then ready for moulders
use.
CLAIM.
To thoroughly grind, beat, and riddle the sand, before using, which is not done
by any other machine in use, and the saving in labour will be equal to, at
least 50%
COMPLETE SPECIFICATION.
A Grinding, Mixing, and Riddling Machine for Foundry Sands and
other Material.
I, GUSTAVUS Rurus, of 26 Scholes Bank, Horwich, in the County of
Lancaster, 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 unprepared sand, with various additions, as coal dust, horse manure, etc., is
thrown roughly into a heap, and is fed into the hopper A as shewn in Figs. 1
and 2, which is screwed to a rectangular frame A¹ cast on the barrel. Enclosed in
the frame, are two grooved cast iron rolls C, shewn in Fig. 3, which crushes
the sand.
The rolls are fitted on to square steel shafts, C¹ and C³, which enables the rolls,
to be replaced when they are worn out.
The pedestals, D1 and D2, which are fitted with dust proof collars, support the
rolls, and are screwed to the barrel E. The centres of the shafts, C¹ and C³, in
Fig. 3, are set apart, to allow a space, of a tinch clearance between the rolls.
The crushed sand, from the rolls drops, into the barrel E, which contains
9 revolving beaters, F, each with four blades, arranged to form a worm. The
object of the beaters is to beat, mix, and deliver the sand, into the revolving
riddle R, at the tail of the barrel E.
The shaft H, which carries the beaters and riddle, revolves, in bearings, in the
head and tail covers, J and J' and in the pedestal K, screwed on the shaft and
recessed in the covers, are two collars, M and N, which prevents any sand, from
entering the bearings. The shaft is driven by the pulley B, which revolves the
beaters F and riddle R, the spur wheel G, being keyed to the shaft H, gears with
the pinion P, fixed on roll shaft C¹.
Another spur wheel on shaft C¹ gears with a similar wheel S¹, on shaft C³, which

page_text: revolves the rolls, in the direction, indicated by the arrows in Figure 3. The
riddle R. is perforated with inch holes, which sieves the sand to the required
degree, the barrel of the riddle is carried by two bosses, Y, Y, each having four
arms, any piece of stone, or other matter, that will not pass through the perforations
in the riddle, is thrown out at the tail end.
The angle iron Z, fitted half way round the barrel, prevents any sand, from
dropping in the space, between the riddle and tail end of the barrel.
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.
1st. A combination and arrangement of parts of a machine for, crushing, mixing
and riddling sand, for foundry and other purposes, as heretofore, described and
illustrated, by Figs. 1, 2 and 3 of the drawing.
2nd. That by the use of the rolls as shewn in Fig. 3. the sand is released from
pressure, as soon as it is crushed, and not overground, as is the case with mortar
mill crushing, thus making it more suitable for light or heavy castings, and a more
extensive use of "old sand" is possible.
3rd. That as by my invention the sand is crushed, mixed, and riddled, by one
operation, which means, a considerable saving of time and labour.
Dated this 7th day of September 1892.
GUSTAVUS RUFUS.