DE1241181B - Device for separating stones and clods of earth from potatoes and other earth fruits - Google Patents

Description

GERMAN - »KTVvnSS PATENTAMT

EDITORIAL

German class: 45 c - 33/04

Number: 1241181

File number: S 74040 HI / 45 C

1 24 1181 Filing date: May 18, 1961

Opened on: May 24, 1967

The invention relates to a device for separating stones and clods of earth from potatoes and other earth fruits.

In individual devices known for this purpose, the material to be sorted is passed through in a row by rays, in particular by X-rays, and the different radiation permeability of the components of the mixture to be sorted is used to switch off the harvested material or the material to be sorted out. to

These known devices have the serious disadvantage that the individual pieces of the goods to be sorted must be arranged in a row in order to successively pass the individual beam used for switching off. This results in a very slow operation of the device, which is why it is almost unusable for work in the field, where the items to be sorted are given up on a conveyor chute in quick succession and it is not possible to pay attention to whether the individual items are arranged in a row by themselves .

This disadvantage is overcome in the device according to the invention by a wide conveyor belt, below its output end one between at least one radiation source and at least one Radiation receiver running transversely to the direction of fall and at least the width of the conveyor belt extending beam plane and under this is an equally wide grate, the individual rods of which Radiation receiver controlled flaps are.

The sorting material falling from the conveyor belt consists not only of stones, clods of earth and fruits of the earth, but also from sand. Because the flaps controlled by the radiation receivers are not connected Level, but form a grate inclined at an angle to the horizontal plane and controlled in this way become that they are in the passage of stones and clods of earth through the plane of rays downwards swivel, but let the earth fruits roll off, the sand can pass through the grate flaps without having to operate the grate flaps Gaps through together with the flaps actuating stones and clods of earth in the for this particular receptacle and is thus separated from the earth fruits.

The flaps forming the grate are pressed by spring action behind a detent, which is briefly pulled away by an electromagnet when the associated Sirahlenempfänger responds, so that the stone or lump of earth falling on the flap under consideration has the opportunity to open the flap by its weight or its impulse to push down against the spring action. Is the stone device for segregating stones and
Lumps of earth from potatoes and others
Earth fruits

Applicant:

National Research Development Corporation,
London

Representative:

Dr. R. Bauer and Dipl.-Ing. H. Hubbuch,
Patent attorneys, Pforzheim, Westliche 31

Named as inventor:
David Laurie Slight,

Ormiston, East Lothian (UK)

Claimed priority:
Great Britain of May 21, 1960 (18 029),
dated March 23, 1961 (10 572)

or if the lump of earth has fallen off, the spring pulls or pushes the flap behind the detent again.

The drawing shows schematically and partially in section two embodiments of the invention. It shows

F i g. 1 shows a first embodiment of a device according to the invention,

FIG. 2 shows an IC flap arrangement for the exemplary embodiment according to FIG. 1,

F i g. 3 shows a second embodiment of a device according to the invention and

F i g. 4 shows a flap arrangement for the exemplary embodiment according to FIG. 3.

Stones, clods of earth and earth fruits 3 are mixed on a wide conveyor belt 2 (Figs. 1 and 3), at the end of its submission 4 funded. Either a row of radiation receivers is under the conveyor belt 2? (Fig. 1) or a single elongated radiation receiver 5 (Fig. 3) attached. the The radiation source is in the embodiment according to FIG. 1 in a box 6 in the embodiment according to F i g. 3 arranged in a container 8. In both cases, a ray plane runs transversely to the direction of fall the stones, clods and fruits of the earth falling from the conveyor belt 2.

Each radiation receiver 7 is connected to each other via electronic amplifiers and further circuitry

709 587/113

Claims (4)

connected to a solenoid 9 so that the solenoid carries current when the associated radiation receiver 7 responds, d. H. is hit by rays. The solenoid 9 pulls back a detent 10 (see FIG. 2) so that the stone 3 falling on a flap 11 of a grate swings it downward against the action of a spring 12 and into a collecting container 13 (FIG. 1) falls. The flaps 11 of the grate are pivotable about a shaft 14 common to all. The radiation receiver does not respond in the case of earth fruits; they roll off the grate bar flaps, which are inclined at about 30c, into a collecting container or (cf. FIG. 3) initially onto a cross conveyor belt 15. The grate bar flaps according to FIG. 4 can also be pivoted about a shaft 14, but with them the solenoid acts directly on the grate bar flaps via an armature 16. A return spring designed as a compression spring 17 holds the grate bar flap in the inclined position shown. Patent claims: 1. Device for separating stones and clods of earth from potatoes and other earth fruits, in which this material is passed through by rays, in particular by X-rays, and the different radiation permeability of the components of the mixture to be separated is used to switch off the harvested material or the material to be separated , characterized by a wide conveyor belt (2), below the delivery end (4) one between at least one radiation source and at least one radiation receiver (5, 7) Transverse to the direction of fall of the items to be sorted (3) and extending over at least the width of the conveyor belt (2) and below this is an equally wide grate, the rods of which are flaps (11) controlled by the radiation receivers. 2. Apparatus according to claim 1, characterized in that the grate is inclined at an angle to a horizontal plane and its flaps (11) are controlled so that they pivot only when stones and clods of earth pass through the beam plane downwards. 3. Apparatus according to claim 1 and 2, characterized in that the flaps (11) of the grate are pressed by a spring (12) behind a detent (10) which is electromagnetically withdrawn from the flap when the associated radiation receiver (7) responds . 4. Apparatus according to claim 1 and 2, characterized in that the flaps (11) of the grate are held in an inclined position by a compression spring (17) , the restoring force of which when the radiation receiver responds by pulling an armature (16) into a solenoid (9) will be annulled. Considered publications:
German Patent No. 516 130;
French Patent No. 1011 349;
U.S. Patent No. 2,675,917; Legacy Patents Considered:
German Patent No. 1 095 636. 1 sheet of drawings 709 087/113 5.67 © Bundesdruckerei Berlin