GB885639A - Improvements in or relating to metal comparators - Google Patents
Improvements in or relating to metal comparatorsInfo
- Publication number
- GB885639A GB885639A GB376657A GB376657A GB885639A GB 885639 A GB885639 A GB 885639A GB 376657 A GB376657 A GB 376657A GB 376657 A GB376657 A GB 376657A GB 885639 A GB885639 A GB 885639A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transformer
- trigger
- packet
- passes
- blades
- 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
- B07C5/344—Sorting according to other particular properties according to electric or electromagnetic properties
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
885,639. Electric tests. SCOTT & CO. (ELECTRICAL ENGINEERS) Ltd., JAMES. May 5, 1958 [Feb. 4, 1957], No. 3766/57. Class 37. [Also in Group XXX] Apparatus for testing ferromagnetic articles comprises a first transformer through which passes a conveyer belt carrying the articles so as to vary the mutual inductance of the transformer, a second transformer designed to receive a standard article, and a comparator fed with the outputs of the transformers and arranged to operate a relay in accordance with the comparison. The apparatus may be used for detecting the number of articles in a packet the mass, density, resistivity or effective permeability, &c. of an article, or differences in the effect of heat treatment. In the apparatus shown, packets of razor blades are passed to a conveyer belt 3 by a shoot 2 and carried through a transformer T1 causing a flap 6 to operate and remove the packet when the number of blades is too few. The transformer T1 is one of a pair of transformers T1, T2 which are connected to an oscillator 8, Fig. 2, and which have their secondaries arranged in opposition so that normally substantially no output is obtained from a balancing unit 9. A comparison specimen 1 is inserted in the transformer T2 to unbalance the circuit so that when a correct packet passes through transformer T1 the output is reduced to zero, while an incorrect packet causes the reduction to a lesser value. The outputs are applied to a detector circuit 10 which passes to two trigger circuits 1 and 2, pulses corresponding to the changes in amplitude and having a magnitude corresponding to the number of blades in the package. Trigger 1 is operated only by pulses corresponding to the incorrectly filled packages while trigger 2 is operated by every pulse and opens a gate 13 allowing any incorrect pulses from trigger 1 to pass to a delay circuit to actuate a flap 6 and reject the package. Suitable circuits are illustrated in the Figs. 6 and 7, but not described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB376657A GB885639A (en) | 1957-02-04 | 1957-02-04 | Improvements in or relating to metal comparators |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB376657A GB885639A (en) | 1957-02-04 | 1957-02-04 | Improvements in or relating to metal comparators |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB885639A true GB885639A (en) | 1961-12-28 |
Family
ID=9764535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB376657A Expired GB885639A (en) | 1957-02-04 | 1957-02-04 | Improvements in or relating to metal comparators |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB885639A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0283650A1 (en) * | 1987-02-28 | 1988-09-28 | Robert Bosch Gmbh | Measuring device for the form of screw-shaped components |
| CN114378361A (en) * | 2022-02-15 | 2022-04-22 | 长沙中金智能装备有限公司 | Feeding device for steel shearing machine and waste steel processing system |
-
1957
- 1957-02-04 GB GB376657A patent/GB885639A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0283650A1 (en) * | 1987-02-28 | 1988-09-28 | Robert Bosch Gmbh | Measuring device for the form of screw-shaped components |
| CN114378361A (en) * | 2022-02-15 | 2022-04-22 | 长沙中金智能装备有限公司 | Feeding device for steel shearing machine and waste steel processing system |
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