GB703694A - A method and means for sorting - Google Patents
A method and means for sortingInfo
- Publication number
- GB703694A GB703694A GB2541050A GB2541050A GB703694A GB 703694 A GB703694 A GB 703694A GB 2541050 A GB2541050 A GB 2541050A GB 2541050 A GB2541050 A GB 2541050A GB 703694 A GB703694 A GB 703694A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cell
- light
- reflected light
- lens
- reflector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/34—Sorting according to other particular properties
- B07C5/342—Sorting according to other particular properties according to optical properties, e.g. colour
- B07C5/3425—Sorting according to other particular properties according to optical properties, e.g. colour of granular material, e.g. ore particles, grain
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
703,694. Photo-electric sorters. NATIONAL COAL BOARD, WHELAN P. F., and EDMONDS, DE L. E. Oct. 15, 1951 [Oct. 18, 1950], No. 25410/50. Class 40 (3). [Also in Group XXIX] Articles are sorted by determining photoelectrically the relative specular and diffuse reflectivity of each object. As shown, lumps of coal, the bright ones of which are to be diverted into a compartment 15 pass one at a time down a shoot into a compartment 14. Each passes over a narrow slit 1A in the shoot and the underside of the slit is illuminated by a source 3. Two photo-cells 4, 5 are provided which receive light reflected from the coal. Cell 4 receives specularly reflected light with the assistance of a reflector 4A and cell 5 which is situated in a reflector 5A receives diffused light. The output of the cells are compared in an amplifier 6 the output of which may depend on the difference of the cell responses or response of one cell and a multiple of the other. This output operates on an electromagnetically controlled valve allowing a fluid pressure servo system (vide infra) to move a deflecting flap 12. A time delay device may be incorporated in the amplifier circuit to allow the coal to reach the flap. In the embodiment of Fig. 2 (not shown) two separate light beams alternately chopped by a rotating wheel, Fig. 5 (not shown) are used. The first projects light at right angles to the conveyer surface, the second at 45 degrees. A single photo-cell is employed, the axis of the reflector being at 45 degrees to the conveyer surface, so that this cell receives alternately diffusely and specularly reflected light from the first and second light sources respectively. The amplifier compares the two sets of pulses and operation of the valve is as for Fig. 1. In the embodiment of Fig. 3 a single source 3 directs light from the reflector 19 through a lens 21 on to the aperture in the conveyer. Specularly reflected light is teflected back through the centre of the lens to a cell 4 while diffusely reflected light is received through the outside of the lens by cell 5. Otherwise operation is as for Fig. 1. In the arrangement of Figs. 4 and 7 (not shown) the light source and the lens are arranged as in Fig. 3 but specularly reflected light in passing back through the centre of the lens is directed by a prism through an outer row of apertures in a rotating disc ; diffusely reflected light passes through an inner row. This cell 24 receives alternately specularly and diffusely reflected light. Operation is otherwise as in the embodiment described in connection with Fig. 2.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2541050A GB703694A (en) | 1950-10-18 | 1950-10-18 | A method and means for sorting |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2541050A GB703694A (en) | 1950-10-18 | 1950-10-18 | A method and means for sorting |
Publications (1)
Publication Number | Publication Date |
---|---|
GB703694A true GB703694A (en) | 1954-02-10 |
Family
ID=10227219
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2541050A Expired GB703694A (en) | 1950-10-18 | 1950-10-18 | A method and means for sorting |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB703694A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4316799A (en) * | 1978-07-28 | 1982-02-23 | Satake Engineering Company, Ltd. | Automatic control apparatus for an oscillating grain separator |
WO1982004204A1 (en) * | 1981-05-26 | 1982-12-09 | Nat Can Corp | Apparatus for inspecting containers |
US4367817A (en) * | 1980-02-22 | 1983-01-11 | Satake Engineering Co., Ltd. | Color discriminating machine |
EP0033211B1 (en) * | 1980-01-23 | 1984-04-25 | Sortex North America, Inc. | Rejection system for an automatic sorting machine |
US4600105A (en) * | 1983-03-23 | 1986-07-15 | Sphere Investments Limited | Method and apparatus for sorting objects of ore by monitoring reflected radiation |
EP0261840A2 (en) * | 1986-09-26 | 1988-03-30 | Pilkington Plc | Detecting unwanted materials among cullet |
GB2307984A (en) * | 1994-08-28 | 1997-06-11 | Hubert Hergeth | Detecting foreign particles in flow of fibres |
IT201700042162A1 (en) * | 2017-04-14 | 2018-10-14 | Mate S R L | SORTING |
-
1950
- 1950-10-18 GB GB2541050A patent/GB703694A/en not_active Expired
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4316799A (en) * | 1978-07-28 | 1982-02-23 | Satake Engineering Company, Ltd. | Automatic control apparatus for an oscillating grain separator |
EP0033211B1 (en) * | 1980-01-23 | 1984-04-25 | Sortex North America, Inc. | Rejection system for an automatic sorting machine |
US4367817A (en) * | 1980-02-22 | 1983-01-11 | Satake Engineering Co., Ltd. | Color discriminating machine |
WO1982004204A1 (en) * | 1981-05-26 | 1982-12-09 | Nat Can Corp | Apparatus for inspecting containers |
US4693376A (en) * | 1981-05-26 | 1987-09-15 | National Can Corporation | Apparatus for inspecting containers |
US4600105A (en) * | 1983-03-23 | 1986-07-15 | Sphere Investments Limited | Method and apparatus for sorting objects of ore by monitoring reflected radiation |
EP0261840A2 (en) * | 1986-09-26 | 1988-03-30 | Pilkington Plc | Detecting unwanted materials among cullet |
GB2195438A (en) * | 1986-09-26 | 1988-04-07 | Pilkington Brothers Plc | Detecting unwanted materials among cullet |
US4781742A (en) * | 1986-09-26 | 1988-11-01 | Pilkington Plc | Method and apparatus for detecting unwanted materials among cullet |
EP0261840A3 (en) * | 1986-09-26 | 1989-10-18 | Pilkington Plc | Detecting unwanted materials among cullet |
AU601486B2 (en) * | 1986-09-26 | 1990-09-13 | Pilkington Plc | Detecting unwanted materials among cullet |
GB2307984A (en) * | 1994-08-28 | 1997-06-11 | Hubert Hergeth | Detecting foreign particles in flow of fibres |
GB2307984B (en) * | 1994-08-28 | 1999-06-09 | Hubert Hergeth | Device for detecting foreign particles in a fibre line |
IT201700042162A1 (en) * | 2017-04-14 | 2018-10-14 | Mate S R L | SORTING |
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