US2480124A - Manufacture of selenium elements such as rectifiers - Google Patents

Manufacture of selenium elements such as rectifiers Download PDF

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Publication number
US2480124A
US2480124A US660292A US66029246A US2480124A US 2480124 A US2480124 A US 2480124A US 660292 A US660292 A US 660292A US 66029246 A US66029246 A US 66029246A US 2480124 A US2480124 A US 2480124A
Authority
US
United States
Prior art keywords
selenium
rectifiers
washer
base plate
rectifier
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 - Lifetime
Application number
US660292A
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English (en)
Inventor
Driver Douglas Louis Ashton
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Application granted granted Critical
Publication of US2480124A publication Critical patent/US2480124A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/12—Devices for taking out of action one or more units of multi- unit filters, e.g. for regeneration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion

Definitions

  • This invention relates to dry contact rectifiers and photo-electric cells comprising a metal baseplate having thereon a layer of semi-conducting material to which is also applied a cunterelectrode.
  • This difficulty is overcome in accordance with the present invention by applying a thin insulating washer with its upper surface flush with the surface of the semi-conductor. This may conveniently be done by placing the insulating washer upon the surface of the semi-conductor when it is in a plastic condition and applying pressure.
  • the invention will be described as applied to a selenium rectifier.
  • a base plate coated with selenium is subjected to heat and pressure as part of the treatment necessary to convert the selenium from the vitreous condition to the rectiiying allotropic modification.
  • a thin paper washer is placed on the surface of the selenium of such a selenium coated base plate before the heat and pressure is applied.
  • the paper washer is found to have its surface flush with the surface of the selenium.
  • a counter-electrode is then applied over the whole of the flush surface.
  • the rectifier may then be assembled with other rectifiers by means of pressure exerted on the area of the paper washer.
  • the invention is applicable also to photo-electric cells, since as pointed out in the copending application, Serial No. 639,469, filed January 5, 1946, by E. A. Richards, entitled Centre contact photo-cell, an insulating washer or layer may be used therein for the same purpose as in a rectifier.
  • Fig. 1 shows'in cross section a base plate coated with selenium and an insulating washer placed thereon.
  • Fig. 2 is a cross-section of the base plate of Fig. 1 after having been treated to produce a rectifier which is assembled with other rectifiers in a unit.
  • a base plate I having a central aperture 2 is coated with selenium 3,-
  • the coated base plate is then in known manner to be placed in a press and heat applied, it may be, as described in United States Patent No. 2,413,013, issued December 24, 1946, upon an application by Arthur von Hippel entitled Method of making selenium rectifiers, after a preliminary heating without pressure.
  • a paper washer 4 having an aperture therein corresponding to the aperture 2 in the base plate I! is placed on the surface of the selenium 3 as shown in Fig. 1 with the apertures in alignment.
  • the paper washer t may be dished in the centre as shown to facilitate location, the aperture in the washer i being less than that in the base plate.
  • the invention is also applicable to those rectifiers or photo-cells, in which pressure is applied around the periphery of the disc, the paper washer in this case covering a strip round the periphery.
  • the washer 4 may obviously be made of other solid insulating material than paper.
  • Paper washers 4 after they have been applied as described above flush with the surface of the selenium on a selenium coated base plate, serve also as a protection for the edges of the central aperture 2 in the selenium when the central aperture 2 in the base plate I is formed by punching out portions of a plate already coated with selenium.
  • selenium cell as used in the following claim, is to be understood as embracing both selenium photo-cells and selenium rectifiers.
  • a process for the manufacture of a stratified selenium cell having a localized mass of solid electrically insulative material in the selenium layer wherein a base element is provided with an overlying selenium layer which is hot-pressed to convert the selenium to the desired semiconductive allotroplc modification the improvement that comprises placing the solid electrically insulative mass upon the selenium layer prior to the hotpressing, and thereafter hot-pressing against a fiat platen whereby the insulative mass is pressed into the selenium layer flush with the surface thereof and rigidly consolidated therewith, simultaneously with conversion of the selenium to the desired allotropic modification.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Ceramic Engineering (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Rectifiers (AREA)
US660292A 1945-04-07 1946-04-06 Manufacture of selenium elements such as rectifiers Expired - Lifetime US2480124A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2480124X 1945-04-07
IT1232067 1967-02-06

Publications (1)

Publication Number Publication Date
US2480124A true US2480124A (en) 1949-08-30

Family

ID=32232498

Family Applications (2)

Application Number Title Priority Date Filing Date
US660292A Expired - Lifetime US2480124A (en) 1945-04-07 1946-04-06 Manufacture of selenium elements such as rectifiers
US702677A Expired - Lifetime US3503096A (en) 1945-04-07 1968-02-02 Continuous-flow filter for extruders and similar machines for processing plastic materials

Family Applications After (1)

Application Number Title Priority Date Filing Date
US702677A Expired - Lifetime US3503096A (en) 1945-04-07 1968-02-02 Continuous-flow filter for extruders and similar machines for processing plastic materials

Country Status (7)

Country Link
US (2) US2480124A (ja)
AT (1) AT307016B (ja)
CH (1) CH483919A (ja)
DE (2) DE1729193A1 (ja)
ES (1) ES349082A1 (ja)
FR (1) FR1554412A (ja)
NL (2) NL6801131A (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2933661A (en) * 1953-08-05 1960-04-19 Fansteel Metallurgical Corp Rectifier and method of making same

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3715416A (en) * 1971-06-14 1973-02-06 Celanese Corp Filter start-up in dry spinning acrylonitrile copolymer
GB1455611A (en) * 1973-01-23 1976-11-17 Zink Co Inc Plug valve units for extrusion apparatus
US3940222A (en) * 1973-01-23 1976-02-24 J. Zink Co., Inc. Filter changing valve unit
US3938924A (en) * 1974-03-28 1976-02-17 Celanese Corporation Thermoplastic melt apparatus
US4108588A (en) * 1974-09-14 1978-08-22 C.F. Scheer & Cie. Apparatus for processing molten liquid plastics, particularly for extrusion of plastics
JPS5927698B2 (ja) * 1977-11-28 1984-07-07 株式会社日本製鋼所 プラスチツク押出機における自動「ろ」網交換装置
DE3032690A1 (de) * 1980-08-29 1982-05-06 Agfa-Gevaert Ag, 5090 Leverkusen Verfahren und vorrichtung zur kontinuierlichen filterung von fluessigkeiten
US5088231A (en) * 1987-03-04 1992-02-18 Agristar, Inc. Automated system for micropropagation and culturing organic material
JPS63288732A (ja) * 1987-05-20 1988-11-25 Fuji Photo Film Co Ltd 押出成形機用フィルタ交換装置
DE3740911A1 (de) * 1987-12-03 1989-06-15 Hartig Guenter Filtervorrichtung zur reinigung von kunststoffschmelzen
US4814186A (en) * 1988-02-29 1989-03-21 Beringer Co., Inc. Polymer filtration apparatus
US4849113A (en) * 1988-05-23 1989-07-18 Hills William H Continuous polymer filter
DE3900952C1 (ja) * 1989-01-14 1990-03-22 Hermann Berstorff Maschinenbau Gmbh, 3000 Hannover, De
DE4215472C1 (en) * 1992-05-11 1993-05-27 Gneuss Kunststofftechnik Gmbh, 4970 Bad Oeynhausen, De Welt filter for cleaning plastic melts - having sieve plate cut=out along the side which can hold filters in the form of ring members
ATE135283T1 (de) * 1992-05-11 1996-03-15 Gneuss Kunststofftechnik Gmbh Filter für kunststoffschmelzen
US5417866A (en) * 1993-07-02 1995-05-23 Extek, Inc. Continuous flow polymer filtration apparatus and process
US5462653A (en) * 1994-02-15 1995-10-31 Hills, Inc. Apparatus for continuous polymer filtration
DE59507155D1 (de) * 1994-03-15 1999-12-09 Wil Man Polymer Filtration Gmb Steuer- und Filtriereinrichtung für mindestens zwei Fluidteilströme
DE19508658A1 (de) * 1994-03-15 1995-10-12 Wil Man Polymer Filtration Gmb Verfahren zur Nachrüstung eines Filterkopfes eines Kunststoffextruders sowie Steueradapter zur Durchführung des Verfahrens
EP0875357B1 (de) * 1997-05-02 2001-11-07 Kreyenborg Verwaltungen und Beteiligungen GmbH & Co. KG Filtereinrichtung für Strangpressen und Spritzgiessmaschinen
EP3088157B1 (en) * 2015-04-30 2021-05-12 Fimic S.r.l. Filter for plastic material
EP3308940A1 (de) * 2016-10-17 2018-04-18 Next Generation Analytics GmbH Filtersystem für viskose oder hochviskose flüssigkeiten, insbesondere kunststoffschmelzen und verfahren zur filtration von viskosen oder hochviskosen flüssigkeiten
CN107281792B (zh) * 2017-08-24 2019-04-02 王欣鑫 一种暖通管道除污器
US11260570B2 (en) * 2018-05-07 2022-03-01 PSI-Polymer Systems, Inc. Filtration apparatuses and screen changer devices for polymer processing and related methods
PL3960422T3 (pl) * 2020-09-01 2023-02-27 Fimic S.R.L. Urządzenie do ciągłej filtracji stopionego tworzywa sztucznego

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2314104A (en) * 1939-01-22 1943-03-16 Int Standard Electric Corp Selenium rectifier
US2345122A (en) * 1939-10-17 1944-03-28 Herrmann Heinrich Dry rectifier

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA684976A (en) * 1964-04-21 H. Rossiter Paul Straining head for an extruder
US2184177A (en) * 1930-10-23 1939-12-19 Benjamin S Burrell Strainer apparatus
US2243849A (en) * 1940-02-28 1941-06-03 Kratky Anton Electric lamp filament
US3033256A (en) * 1960-08-17 1962-05-08 Dow Chemical Co Screen changer for extruders
US3059276A (en) * 1960-12-05 1962-10-23 Sterling Extruder Corp Extrusion apparatus
US3146494A (en) * 1961-11-13 1964-09-01 Nat Rubber Machinery Co Extruder with reverse flow flushed breaker plate assembly

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2314104A (en) * 1939-01-22 1943-03-16 Int Standard Electric Corp Selenium rectifier
US2345122A (en) * 1939-10-17 1944-03-28 Herrmann Heinrich Dry rectifier

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2933661A (en) * 1953-08-05 1960-04-19 Fansteel Metallurgical Corp Rectifier and method of making same

Also Published As

Publication number Publication date
US3503096A (en) 1970-03-31
DE6608658U (de) 1971-10-07
FR1554412A (ja) 1969-01-17
ES349082A1 (es) 1969-04-01
NL132958C (ja) 1900-01-01
CH483919A (it) 1970-01-15
AT307016B (de) 1973-05-10
DE1729193A1 (de) 1971-06-03
NL6801131A (ja) 1968-08-07

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