US2426246A - Contacting device for electrical elements - Google Patents

Contacting device for electrical elements Download PDF

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Publication number
US2426246A
US2426246A US495858A US49585843A US2426246A US 2426246 A US2426246 A US 2426246A US 495858 A US495858 A US 495858A US 49585843 A US49585843 A US 49585843A US 2426246 A US2426246 A US 2426246A
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US
United States
Prior art keywords
contact
elements
electrode
counter
platform
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
US495858A
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English (en)
Inventor
Skinker Murray Fontaine
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.)
Federal Telephone and Radio Corp
Original Assignee
Federal Telephone and Radio Corp
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
Priority to BE465094D priority Critical patent/BE465094A/xx
Application filed by Federal Telephone and Radio Corp filed Critical Federal Telephone and Radio Corp
Priority to US495858A priority patent/US2426246A/en
Priority to CH256678D priority patent/CH256678A/de
Priority to FR942452D priority patent/FR942452A/fr
Application granted granted Critical
Publication of US2426246A publication Critical patent/US2426246A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
    • H10D48/00—Individual devices not covered by groups H10D1/00 - H10D44/00
    • H10D48/01—Manufacture or treatment
    • H10D48/04—Manufacture or treatment of devices having bodies comprising selenium or tellurium in uncombined form
    • H10D48/048—Treatment of the complete device, e.g. by electroforming to form a barrier

Definitions

  • This invention relates to contacting devices for making contact with electrical elements such as rectiflers and photocells of the plate type, and particularly to contacting means useful in the electro-forming of such apparatus.
  • the object is to provide contacting means which can easily and quickly be moved into and out of contact with the surface of the element with a degree of pressure sufllcient for good contact but not so high as to be injurious.
  • A' related object is quickly to make or release contact with any of a large number of such elements.
  • Plate-type rectifiers ordinarily comprise a base plate having thereon an adherent layer of a semiconductor such as selenium, with a counter-electrode such as a sprayed alloy metal over the semiconductor.
  • a semiconductor such as selenium
  • a counter-electrode such as a sprayed alloy metal over the semiconductor.
  • Such devices are commonly electroformed before use by applying to them a voltage which sends a current through them in the direction opposite to the direction of normal forward current flow. To do this it is required that electrical contact be made with the base plate and with the counter-electrode. It is commonly considered that the rectifying properties are due to the formation of a "barrier layer at the selenium surface beneath the counter-electrode.
  • the member making contact with the counter-electrode should exert suflicient pressure against the counter-electrode to make a good contact but not so much pressure as to injure the barrier layer at the selenium surface. It is, moreover, desirable that the contact shall be one which ma readily be made or removed at will in order to remove elements being electro-formed.
  • I provide a movable contact member having a spring contact which is adapted to be moved into contact with the counter-electrode while the base of the element is resting on the other electrical connections.
  • Fig. 1 is a face view of a ment to be electro-formed
  • Hg. 2 is a side view in section of the element shown in Fig. 1;
  • Fig. 3 shows the contacting means by which an element such as that of Figs. 1 and 2 may be electro-formed.
  • a rectifier or photocell may commonly comprlse a base plate I which may be of any suitable conducting material such as iron or steel or aluminum or the like. Over the base plate there is placed a thin layer of a semi-conductor material such as selenium, and over the semi-conductor there is placed a thin coating of a counter-electrode I which may be an alloy sprayed on in molten form.
  • a rectifier there is usually a hole 4 centrally located through disc I and the spray 3 is usually kept at some distance away from the central hole and the outer periphery of the disc so as to prevent short-circuiting from the counter-electrode to the base plate.
  • a minutely thin barrier layer is formed at the surface of the transmittin current in the forward direction but having an extremely high resistance to current flow in the opposite direction.
  • This barrier layer is easily susceptible to injury which would destroy the properties of the element. For example, a scraping or high pressure applied to it would injure it; consequently, contact members placed against the counter-electrode 3 should not make too heavy a contact pressure.
  • a semi-conducting element such as those shown in Figs. 1 and 2 will operate most effectively, it should be electro-formed by sending a current flow between base I and counter-electrode 3 in the direction opposite that of normal forward current flow. This will build up the voltage which it can withstand and improve its rectifying property. This is done by sendin a unidirectional current fiow between base I and counter-electrode 3 in the direction opposite that of normal forward current flow,
  • Th arrangement according to my invention is designed readily to e1ectro-form the element.
  • Fig. 3 it comprises an elongated platform 5 of a conducting material such as brass or any other suitable metal, which may be mounted on a base board 25.
  • platform 5 may be of a pipe-like construction as shown so that water or other cooling fluid may be made to flow through its interior 6 to conduct away heat developed during the electro-forming.
  • a thin flat plate 1 having a serrated or sawtooth or similar shaped edge 8 is placed flat along the rear of platform 5. The arrangement is such that the rectifier plates or discs 9 ma be placed individually in the serrations of plate 1 and flat on platform 5 with the base plate 1 against the platform, as shown.
  • the platform is elongated and there are a large number of serrations in sheet 'I, a large number of semi-conductor elements may be accommodated.
  • the upper contacts against the counter-electrode surfaces of the elements 9 are provided by a corresponding number of spring contact members I0. These are mounted by screws or otherwise along a supporting member II shown as an angle member, and are insulated from the angle member by suitable insulation strips 30. Contact members I! have protruding from the rear suitable lugs I2 to which connecting lines I: may be soldered or otherwise attached.
  • the supporting member II is mounted on lugs ll adapted to pivot on a rod or bar i5 which in turn is mounted on support l6 supported by the base board.
  • member H is adapted to pivot the member on rod l5 and to pull down the contacts against the tension of a spring l8 which is fastened at one end to the lower face of member II and at the other end to a pin in the base.
  • Handle I1 is adapted to be held down in its lower position ⁇ by a pivoted detent l9 having a hook or the like 20 which passes over handle l1.
  • the handle I! when the handle I! is brought down it then passes along the oblique camming surface 2
  • the handle I! is below the hook 20 of the detent, the spring snaps the detent into its holding position.
  • This arrangement has the advantage of always providing the desired degree of pressure of the contacts against the discs sufiicient to make good electrical connection but insuflicient to harm the discs. Furthermore, it permits the placing of a very large number of the discs in position at one time and releasing them all at one time so that any of them may be withdrawn as desired.
  • Suitable electrical connection may be made to the contact members by connecting all of the contacts to one wire 23 of the voltage source and the other wire 24 of the voltage source to the platform 5. Thus, all of the discs 9 are connected in parallel across the forming voltage source.
  • resistances may be inserted individually in the individual wires l3 connecting to the contacts so as to limit the current flowing through the individual elements.
  • a semi-conductor element comprising a conducting platform, on which I a plurality of said elements are adapted to rest, positioning means for said elements comprising a serrated strip on said platform against which said elements are placed to engage the serrations of said strip, a plurality of spring contact memlbers for making contact individually with the opposite electrodes ,of each element, a pivotally mounted supporting member on which said contact members are mounted, and a lever for moving said supporting member to move said contact members into or out of contact with said electrodes.
  • Contacting means for a semi-conductor element comprising a conducting platform on which a plurality of said elements are adapted to be placed, a plurality of spring contact members for making contact individually with the opposite electrode of each element, positioning means for said elements comprising a serrated strip against which said elements are adapted to be placed to engage the serrations of said strip, a supporting member on which said contact members are mounted, a lever attached to said supporting member for pivoting said supporting member to move said contact members into or out of contact with said other electrodes, a detent adapted to engage said lever when said contacts are in contact, and spring means'for urging said detent into engagement with said lever.

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US495858A 1943-07-23 1943-07-23 Contacting device for electrical elements Expired - Lifetime US2426246A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE465094D BE465094A (en)) 1943-07-23
US495858A US2426246A (en) 1943-07-23 1943-07-23 Contacting device for electrical elements
CH256678D CH256678A (de) 1943-07-23 1946-01-17 Vorrichtung für die gleichzeitige Elektroformierung einer Anzahl Halbleiterelemente.
FR942452D FR942452A (fr) 1943-07-23 1946-03-29 Dispositif pour établir des contacts électriques sur plusieurs éléments simultanément

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US495858A US2426246A (en) 1943-07-23 1943-07-23 Contacting device for electrical elements

Publications (1)

Publication Number Publication Date
US2426246A true US2426246A (en) 1947-08-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
US495858A Expired - Lifetime US2426246A (en) 1943-07-23 1943-07-23 Contacting device for electrical elements

Country Status (4)

Country Link
US (1) US2426246A (en))
BE (1) BE465094A (en))
CH (1) CH256678A (en))
FR (1) FR942452A (en))

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2663844A (en) * 1951-03-29 1953-12-22 Western Electric Co Contact fixture
US2691144A (en) * 1952-07-12 1954-10-05 Fansteel Metallurgical Corp Electroforming apparatus for rectifier disks
US2710375A (en) * 1950-05-20 1955-06-07 Battelle Development Corp Resistor testing device
US2733973A (en) * 1956-02-07 ttirf rfhjvenator
US2768421A (en) * 1952-05-17 1956-10-30 Clevite Corp Method of making circuit connections to a transducer unit
US2812994A (en) * 1955-11-14 1957-11-12 Sylvania Electric Prod Lead-in wire contacting apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE906002C (de) * 1944-08-23 1954-03-08 Siemens Ag Verfahren und Schaltungsanordnung zum elektrischen Formieren von Selengleichrichtern

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1295040A (en) * 1914-02-26 1919-02-18 Union Electric Mfg Company Multiple switch.
US1561483A (en) * 1920-04-23 1925-11-17 Wireless Specialty Apparatus Distinguishing dielectric sheets
US2260842A (en) * 1939-12-13 1941-10-28 Gen Electric Electric capacitor
US2360191A (en) * 1942-02-20 1944-10-10 Sperry Gyroscope Co Inc Directional gyroscope
US2360618A (en) * 1942-12-03 1944-10-17 Western Electric Co Electrical testing device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1295040A (en) * 1914-02-26 1919-02-18 Union Electric Mfg Company Multiple switch.
US1561483A (en) * 1920-04-23 1925-11-17 Wireless Specialty Apparatus Distinguishing dielectric sheets
US2260842A (en) * 1939-12-13 1941-10-28 Gen Electric Electric capacitor
US2360191A (en) * 1942-02-20 1944-10-10 Sperry Gyroscope Co Inc Directional gyroscope
US2360618A (en) * 1942-12-03 1944-10-17 Western Electric Co Electrical testing device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2733973A (en) * 1956-02-07 ttirf rfhjvenator
US2710375A (en) * 1950-05-20 1955-06-07 Battelle Development Corp Resistor testing device
US2663844A (en) * 1951-03-29 1953-12-22 Western Electric Co Contact fixture
US2768421A (en) * 1952-05-17 1956-10-30 Clevite Corp Method of making circuit connections to a transducer unit
US2691144A (en) * 1952-07-12 1954-10-05 Fansteel Metallurgical Corp Electroforming apparatus for rectifier disks
US2812994A (en) * 1955-11-14 1957-11-12 Sylvania Electric Prod Lead-in wire contacting apparatus

Also Published As

Publication number Publication date
FR942452A (fr) 1949-02-09
BE465094A (en))
CH256678A (de) 1948-08-31

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