US2462899A - Method and apparatus for coating dry rectifier elements - Google Patents

Method and apparatus for coating dry rectifier elements Download PDF

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Publication number
US2462899A
US2462899A US527178A US52717844A US2462899A US 2462899 A US2462899 A US 2462899A US 527178 A US527178 A US 527178A US 52717844 A US52717844 A US 52717844A US 2462899 A US2462899 A US 2462899A
Authority
US
United States
Prior art keywords
strip
support
discs
tape
elements
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
US527178A
Other languages
English (en)
Inventor
William E Riecken
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
Federal Telephone and Radio Corp
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
Priority to BE466290D priority Critical patent/BE466290A/xx
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to US527178A priority patent/US2462899A/en
Priority to GB495/45A priority patent/GB605319A/en
Priority to CH259943D priority patent/CH259943A/de
Application granted granted Critical
Publication of US2462899A publication Critical patent/US2462899A/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
    • H10D48/042—Preparation of foundation plates
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S438/00—Semiconductor device manufacturing: process
    • Y10S438/942—Masking
    • Y10S438/943—Movable

Definitions

  • This invention relates to the manufacture of dry rectifier elements and particularly to a process for applying insulating coating to selected portions of the semi-conducting layer and subsequently coating said partially insulated layer with a metallic counter-electrode.
  • Dry rectifier elements generally comprise a metallic base plate, a semi-conducting layer such as a layer of selenium thereon, and a metallic counter-electrode coverin said layer.
  • a semi-conducting layer such as a layer of selenium thereon
  • a metallic counter-electrode coverin said layer.
  • the insulating material in the form of a lacquer or paint may advantageously be applied on opposite segments of the -semi-conductin layer, as by applying a maskingstrip covering the central portion of the element and then coating the exposed segments. Thismay advantageously be carried out by simultaneously masking and coating a plurality of such elements mounted in a row and centrally covered by the samemask.
  • a further object is to provide a suitable support-for the elements during masking and coating, and in particular a support on which a plurality of elements carried by a mounting strip can readily be placed, masked, coated and removed under production conditions.
  • a curved support for the mounting strip is employed, against which the strip is held during application of the insulation.
  • a feature of the invention is the utilization of the masking tape to hold a flexible support in curved position, which is readily accomplished by detachably fastening the tape adjacent one end of the support, drawing the tape tightly down across the series of elements and detachably fastening it adjacent the other end of the strip. This method is especially advantageous since the masking tape and series of elements can be rapidly applied to and removed from a support.
  • the invention also includes the provision of a suitable mounting strip support construction; and a specific feature comprises mounting clips for attaching and detaching the masking strip.
  • the support is in the form of a hand jig, arranged so that the element mounting strip and the masking tape can be rapidly and accurately attached to the support with one hand, followed by application of the insulating liquid and removal of the masking tape and mounting strip with the other hand in a convenient, accurate and rapid manner suitable for commercial production.
  • FIG. 1 is a side elevation of the jig with a mounting strip and masking tape in position for applying the insulation, a preliminary position being indicated in dotted lines;
  • Fig. 2 is a plan view of Fig. 1, and
  • H is then removed by drawing the ends of tape 11 from beneath clips I6.
  • the insulation may 7 be allowed to dry before or after removal of the tape, according to the drying rate of the liquid used, and the strip II is then ready for--the application of the counter-electrode.
  • a jig (2 for mounting the strip H in position for masking and coating is provided with a handle l3 centrally attached to a support plate I4 longitudinally curved andprovided with suitable means for holding strip II in flexed position against its convex surface.
  • a bifurcated hook I5 is formed integrally at one end of support 14, arranged to engage an end of the strip l l which may be slipped under the hook.
  • a tape clip attached to the bottom of the support l4 near one end extends inwardly and diverges from the support to provide a clamping notch into which the end of the masking tape l I maybe drawn and firmly held.
  • the clip 15 is provided with a sharp edge I8 across which the tape end may be drawn to sever it.
  • a central tape-locating notch 19 extends through the end of support l4 and hook l5 and advantageously is just wide enough to receive the tape and hold it in registered central position.
  • the opposite end of support 14 is provided with a similar clip l6 and notch 19. The inner end of around the edge 20.
  • for maintaining the mounting strip H in registered central position may be carried by support l4, and in the form illustrated consist of metal strips attached to the support plate l l by the same rivets 22 used to attach clips l6.
  • Each guide 2i has upturned ends projecting above plate [4 and fitting the sides of strip ll, said ends being slightly flared outwardly to facilitate insertion of the strip;
  • are advantageously located adjacent the ends of support plate I4.
  • the strip H carrying elements 10 to which the semi-conducting layer has'already been applied, is placed with one end under the hook H5 in the position indicated in dottedlines in Fig. 1.
  • An end of the masking tape l1 iswedged beneath the right hand clip I6 and cut ofi against the edge I8 if desired. It is then bent around edge 20, brought up through notch l9, thence across the elements ID, and is drawn downwardly through the opposite notch l9, pulling the strip I l against the curved face of support I4.
  • the left hand end of the tape is then brought under the support but around edge and drawn between the plate l4 and the left hand clip 5, wedging it in place, and is cut off by drawing it against the adjacent edge [8. In this position the tape ⁇ I1 is drawn tightly against the outer face of each element In, due to the longitudinal tension on the tape, the curvature of the strip I I and the spring pressure of said strip.
  • the insulating liquid which may be lacquer, varnish, paint or the like, can then be readily applied to the exposed lateral segments of the elements ID, as by brushing or spraying with one hand while the jig is held in the other.
  • the strip of the masking tape under production conditions while assuring the accurate centering of the tape across the exposed semi-conducting layers of the rectifier elements Ill.
  • the tape may be of any suitable flexible material, paper of the requisite strength having been found especially suitable and inexpensive, since it may be obtained in large rolls and discarded after use.
  • the improved method for coating a limited area of each of a series of rectifier discs comprising partially striking up a series of discs from a sheet metal member with the struck up discs in alignment, flexing said member to cause the outer surfaces of said discs to be located along a convex curve, protecting portions of said discs by applying a flexible masking strip along said curve across a portion of the outer surface of each disc, and applying tension to said strip to cause it to engage tightly the surfaces of said discs while a coating material is applied to the exposed portions of said surfaces.
  • a support having a convex curved surface onto which rectifier discs to be coated may be placed in alignment, a flexible masking strip, and means to secure the ends of said strip adjacent the ends of said curved convex surface, said last named means being arranged to hold the strip under tension radially inwardly of said curved surface and across said series of discs to cause it to'engage tightly the surfaces of said discs whereby the portions of the surfaces of the discs covered by said masking strip are protected when coating material is applied to the exposed surfaces of the discs.
  • apparatus for coating limited areas of rectifier discs partially struck up from a sheet 'metal member comprising means to support said member in a manner to curve the member with the partially struck out discs protruding from a convex curved surface of said member, a flexible masking strip, and means for holding said strip under tension in position lengthwise .across the surfaces of said discs along the convex curved outline thereof to cause the strip to engage tightly V particularly 6.
  • said means for holding said member includes a support having a curved convex surface, means a forming a recess at one end of said curved surface to receive one end portion of said member, means for securing said strip adjacent said one end of said member and means adjacent the other end of the curved surface of said support to hold said strip under tension, whereby said strip when drawn under tension over said member causes said member to conform to the curved surface of said support.
  • a jig for holding a flexible masking strip against aligned rectifier discs carried by a flexible mounting during coating which comprises a support for the mounting arranged to hold the mounting in convex position, and retaining devices for the end portions of the strip carried by the support arranged to retain the strip in position during coating, each of said retaining devices comprising a clip including a clamping part and a bending edge located diagonally across the path of said strip.
  • a support for a plurality of rectifier discs to be coated after aligning a masking strip against said discs which comprises a convex surface on the support, the said rectifier discs being aligned on said convex surface, a flexible masking strip adapted to cover a part of each of the said discs and a clip adjacent each end of said convex surface to hold the strip in masking position against said discs, each clip including a clamping part and a bending edge located diagonally across the path of the strip.

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  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
US527178A 1944-03-20 1944-03-20 Method and apparatus for coating dry rectifier elements Expired - Lifetime US2462899A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE466290D BE466290A (enrdf_load_stackoverflow) 1944-03-20
US527178A US2462899A (en) 1944-03-20 1944-03-20 Method and apparatus for coating dry rectifier elements
GB495/45A GB605319A (en) 1944-03-20 1945-01-05 Coating limited area of rectifier discs
CH259943D CH259943A (de) 1944-03-20 1946-07-13 Verfahren und Anordnung zur Herstellung von Trockengleichrichterelementen.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US527178A US2462899A (en) 1944-03-20 1944-03-20 Method and apparatus for coating dry rectifier elements

Publications (1)

Publication Number Publication Date
US2462899A true US2462899A (en) 1949-03-01

Family

ID=24100421

Family Applications (1)

Application Number Title Priority Date Filing Date
US527178A Expired - Lifetime US2462899A (en) 1944-03-20 1944-03-20 Method and apparatus for coating dry rectifier elements

Country Status (4)

Country Link
US (1) US2462899A (enrdf_load_stackoverflow)
BE (1) BE466290A (enrdf_load_stackoverflow)
CH (1) CH259943A (enrdf_load_stackoverflow)
GB (1) GB605319A (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2562741A (en) * 1947-02-13 1951-07-31 Dictaphone Corp Method of making sealed electromechanical translating devices
US2639392A (en) * 1949-12-30 1953-05-19 Bell Telephone Labor Inc Masking device for crystals
US2977930A (en) * 1958-12-10 1961-04-04 Sylvania Electric Prod Work holders for use with spray devices
US3007440A (en) * 1958-07-21 1961-11-07 Dearborn Electronic Lab Of Del Apparatus for applying solder to the ends of foil capacitors
US4066039A (en) * 1976-09-07 1978-01-03 Nasa Adjustable securing base

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2758947A (en) * 1952-05-02 1956-08-14 Northrop Aircraft Inc Method of insulating a clip
CN119016239B (zh) * 2024-10-28 2025-01-03 烟台金辉汽车内饰件有限公司 一种用于汽车内饰的喷涂机

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1123422A (en) * 1913-07-28 1915-01-05 Us Envelope Co Method for producing a transparent panel in paper and the like.
US1584914A (en) * 1924-11-19 1926-05-18 Stanley Mfg Company Apparatus and method of decorating labels
US1817147A (en) * 1929-08-10 1931-08-04 Hudson Motor Car Co Spray stencil
US2137831A (en) * 1936-06-13 1938-11-22 Gen Electric Method of producing dry plate elements for selenium rectifiers and the like
US2324184A (en) * 1942-04-11 1943-07-13 Letourneau Inc Shell casing supporting and protector ring

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1123422A (en) * 1913-07-28 1915-01-05 Us Envelope Co Method for producing a transparent panel in paper and the like.
US1584914A (en) * 1924-11-19 1926-05-18 Stanley Mfg Company Apparatus and method of decorating labels
US1817147A (en) * 1929-08-10 1931-08-04 Hudson Motor Car Co Spray stencil
US2137831A (en) * 1936-06-13 1938-11-22 Gen Electric Method of producing dry plate elements for selenium rectifiers and the like
US2324184A (en) * 1942-04-11 1943-07-13 Letourneau Inc Shell casing supporting and protector ring

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2562741A (en) * 1947-02-13 1951-07-31 Dictaphone Corp Method of making sealed electromechanical translating devices
US2639392A (en) * 1949-12-30 1953-05-19 Bell Telephone Labor Inc Masking device for crystals
US3007440A (en) * 1958-07-21 1961-11-07 Dearborn Electronic Lab Of Del Apparatus for applying solder to the ends of foil capacitors
US2977930A (en) * 1958-12-10 1961-04-04 Sylvania Electric Prod Work holders for use with spray devices
US4066039A (en) * 1976-09-07 1978-01-03 Nasa Adjustable securing base

Also Published As

Publication number Publication date
CH259943A (de) 1949-02-15
GB605319A (en) 1948-07-21
BE466290A (enrdf_load_stackoverflow)

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