US857065A - Grain-cleaning apparatus. - Google Patents

Description

No: 857,065. PATENTED JUNE 18, 1907. J. B. HOLGATB & G. GLOUGH. GRAIN CLEANING APPARATUS.

APPLICATION FILED NOV. 18, 1904.

JWMZW I'Nl mmms prrnns co., WASHINETON n. cy

UNITED STATES PATENT oEEroE.

JACOB BELL HOLGATE AND CHARLES CLOUGI-I, OF BLACKBURN, ENGLAND; AID CLOUGI-I ASSIGNOB TO SAID I-IOLGATE.

Specification of Letters Patent.

Patented June 18, 1907.

Application filed November 18, 1904. Serial No. 283,340.

To all whom it may concern:

Be it known that we, JACOB BELL HOL- GATE and CHARLES OLoUon, subjects of the King of Great Britain, residing at Blackburn, in the county of Lancaster, England, have invented new and useful Improvements in Grain-Cleaning Apparatus, of which the following is a specification.

The invention has reference to apparatus for separating, by means of air currents, the light particles dust &c from grain, semolina, or other granular .materials the dust being afterward separated from the air currents as desired at any convenient point. Hitherto apparatus for performing the above operations has consisted of fans contained in close cases and connectedv by air trunks with the separating and collecting appliances. Our invention dispenses with separate fans trunks &c and at the same time gives more uniform and e'tficient separation by the use of a novel air propeller in conjunction with a feed hopper adjacent thereto.

In carryin out the invention we make use of pliances substantially as illustrated on the c rawings on which Figure l is a plan and Fig. 2 a central longitudinal section of one arrangement under our invention. Fig. 3 is a central longitudinal section of a modification.

Referring to Figs. 1 and 2. 1 is a rotatable shaft upon which are secured end disks 2; and 3 are vanes or blades fixed into the disks 2 thus forming an air propeller without an inlet of air to its center but inducing a cur- .rent of air of uniform velocity the whole width of its face by friction or moving of its periphery through the air. When feeble air currents only are desired the vanes 3 may be dispensed with, merely a cylinder 3 connecting the disk 2 and slightly roughened on its surface being employed as shown in. Fig. 3. 4 is a casing surrounding the air propeller and preferably being closer thereto at the point 5 than at 6, while at 7 the casing is extended to form expansion spaces and de positing compartments 8', 9. wardly moving side of the propeller is placed a hopper 10 from which the material to be treated is fed by any convenient means so as At the up-- to fall across the current of air from the propeller and into the compartment 8. Any light particles and dust in the material are driven up by the air current over the edge of the compartment or directing plate I] where the lighter particles fall into the compartment 9 while the dust is carried back with the air current to the downwardly moving side of the propeller where being driven by centrifugal force against the casing it escapes through an opening 12 into a compartment 13 whence it is removed as desired. The arrows show the direction of motion. Several compartments such as 9 may be used to receive particles of different degrees of lightness. The hopper being disposed close to the propeller the current or film of air from the latter is diverted and passes up the front of the hopper through the fallingn'iaterial and into the expansion space thence back over the top of the hopper (which is closed) and through a regulating valve 14 to the periphery of the propeller again thus continually circulating and separating the dust and light particles without leaving the casing t. 15 is a feed spout or trunk to the hopper 10 from outside the casing.

Referring to Fig. 3 which is a sectional view showing a modification under our invention suitable in use for treating very fine material. In this arrangement the feed hopper first delivers the material on to a sieve 16 which is caused to vibrate, rotate, or reciprocate in any usual way. The material is thus more elliciently exposed to the action of the air current which passes up through the sieve. The particles passing the sieve fall into the compartment 8 the tailings fall into the compartment 17 and the light particles into the compartment 9, the other parts of the machine being similar to Figs. 1 and 2 and having similar reference numbers thereon.

1 hat we claim and desire to secure by Letters Patent is A separating machine consisting of a casing having expansion spaces and collecting compartments therein, an air propeller in said casing, a feed hopper within the casing the rear wall thereof being inclined, and located in close proximity to the upwardly names to this specification in the presence moving part of the propeller so as to direct of tWo subscribing Witnesses.

the air from the propeller across the mouth JACOB BELL HOLGATE. of the hopper and deflecting plates co-operat- CHARLES CLOUGH.

ing with the propeller to form a continuous WVitnesses:

belt of air around said hopper. EDWIN AINsWOR'rH,

In testimony whereof We have signed our I CHARLES HALsTEAD.

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