GB816623A - Improvements in or relating to screening apparatus - Google Patents
Improvements in or relating to screening apparatusInfo
- Publication number
- GB816623A GB816623A GB8672/57A GB867257A GB816623A GB 816623 A GB816623 A GB 816623A GB 8672/57 A GB8672/57 A GB 8672/57A GB 867257 A GB867257 A GB 867257A GB 816623 A GB816623 A GB 816623A
- Authority
- GB
- United Kingdom
- Prior art keywords
- panels
- phase
- nuts
- groups
- screen
- 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
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/56—Heated screens
- B07B1/62—Heated screens heated by direct electric heating
Landscapes
- Control Of Resistance Heating (AREA)
- Furnace Details (AREA)
- General Induction Heating (AREA)
Abstract
816,623. Sifting apparatus. BURSTLEIN, E. M., and SOC. DES ACIERIES DE LONGWY. March 15, 1957 [July 21, 1956], No. 8672/57. Class 117 A screen, electrically heated by the flow of current therethrough, is divided into an even number of panels, one half of which is supplied from one phase of a two-phase source, and the other half is fed from the other phase. The source may comprise a 3 to 2 phase converting transformer fed from a 3 phase network, and the secondary voltage may be adjustable up to a maximum of 24 volts. Panels in each group may be connected in series, parallel, or series-parallel relation. To provide differential heating of the two groups the impedances thereof may be different or the groups may be supplied with different voltages. To provide a balanced differential heating of the groups, the impedance per unit area of one group may differ from that of the other, whilst the lengths of the panels in each group may also differ so that the overall impedance of both groups is the same. A high current connection to a screen gauze 46 is shown in Figs. 7 and 8, and includes a plate 43 forming part of means for stretching the the screen and compensating for the expansion thereof, slidably mounted over a guide secured to the screen frame. Threaded rods 44 arranged in two parallel rows are secured to the plate and project through a bus-bar 45, the gauze 46 and a clamping plate 47, and nuts 41 secure the assembly. Fig. 10 shows an electrical connection between adjacent gauze panels, and includes a plate 52 insulated from the screen frame and attached thereto by two rows of threaded rods 53 and nuts. Threaded rods 58, in two parallel rows, pass through a bus-bar 45, the two gauze panels 46 and 59 and a clamping plate 42. Nuts 41 secure the assembly. In both of the electrical connections described nut locking means 42 are provided. An intermediate support for large screens consists of a cross-member 60, Fig. 11, extending between the sides of the screen frame and carrying a channel shaped element 61 in which is resiliently secured an insulating member 62 e.g. of ceramic, held by nuts and bolts 65, 66. Specification 726,197 is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR816623X | 1956-07-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB816623A true GB816623A (en) | 1959-07-15 |
Family
ID=9267889
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8672/57A Expired GB816623A (en) | 1956-07-21 | 1957-03-15 | Improvements in or relating to screening apparatus |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB816623A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT525173A4 (en) * | 2022-04-12 | 2023-01-15 | Sbm Mineral Proc Gmbh | screening device |
-
1957
- 1957-03-15 GB GB8672/57A patent/GB816623A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT525173A4 (en) * | 2022-04-12 | 2023-01-15 | Sbm Mineral Proc Gmbh | screening device |
AT525173B1 (en) * | 2022-04-12 | 2023-01-15 | Sbm Mineral Proc Gmbh | screening device |
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