US2734257A - jonsson - Google Patents

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Publication number
US2734257A
US2734257A US2734257DA US2734257A US 2734257 A US2734257 A US 2734257A US 2734257D A US2734257D A US 2734257DA US 2734257 A US2734257 A US 2734257A
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US
United States
Prior art keywords
springs
contact
moulding
spring
insulating
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
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English (en)
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H01H11/04—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H01H11/0056—Apparatus or processes specially adapted for the manufacture of electric switches comprising a successive blank-stamping, insert-moulding and severing operation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H01H50/56—Contact spring sets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H63/00—Details of electrically-operated selector switches
    • H01H63/02—Contacts; Wipers; Connections thereto
    • H01H63/06—Contact banks
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49117—Conductor or circuit manufacturing
    • Y10T29/49204—Contact or terminal manufacturing
    • Y10T29/49208—Contact or terminal manufacturing by assembling plural parts
    • Y10T29/4922—Contact or terminal manufacturing by assembling plural parts with molding of insulation

Definitions

  • the present invention relates to a method for production of contact springs for contact spring sets in electromagnetic connecting devices.
  • contact springs When contact springs are put together to a group in a connecting device, insulating intermediate layers are usually placed between the supported parts of the springs or else grooves made in an insulating fastening device, in which the springs are inserted.
  • Fig. 1 shows a contact spring without an insulating envelope.
  • Fig. 2 shows three such contact springs with moulded, individual insulating envelopes 10 and ready for assembly in a connecting device.
  • the contact spring shown in Fig. 1 has a resilient part 11 with contact points 12, a part 13 intended for fastening or supporting and finally a smaller part 14 comprising a soldering peg for connection of connecting wires.
  • Such contact springs are inserted individually in a moulding tool for thermoplastic substances.
  • the part 13 intended for fastening is placed in the moulding cavity and the adjoining parts 11 and 14 control the spring of the tool.
  • Fig. 1 there are corresponding holes 15, 16 in the part intended for fastening.
  • the two remotest parts of these have, however, a somewhat greater diameter than the pegs of the moulding tool.
  • these holes are therefore partly filled with plastic substance, so that no electric connection can arise between the difierent springs, when these are fixed together by means of screws 23 or the like.
  • the moulding tool four small pins are placed on each side of the moulding tool, which pins hold the part intended for fastening in a fixed position in order to prevent this part item being bent, when the moulding compound penetrates into the tool.
  • the insulating envelope 10 which after the moulding surrounds the contact spring, four small holes 24 are formed behind these guide pins on each side of the contact spring.
  • plastics of polystyrol type as insulating compound, said plastics being of such a quality that it has a high stability of form when heated.
  • the insulating envelope obtained at the moulding needs not be worked in any especial working operation, after the contact spring has been taken out of the moulding tool, but the spring can be assembled directly in the apparatus. If one wishes that the spring shall possess a certain voltage at the assembly this can be obtained in such a way that the guide pins of the moulding cavity are so arranged that the single contact spring at the insertion in the tool is bent, whereafter the insulating compound is moulded around.
  • the proposed method is especially adapted for contact springs cut out of plate bands, which springs are put together in one or more contact groups.
  • Figs. 3 and 4 which show difierent views of a material band with contact springs partly cut out
  • a material band 111i in a known manner has been fed past a machine not shown, which punches spaces 111, 112 between the contact spring blanks 113, so that these only partly are united by plates 114, which are not punched out.
  • the three shown contact blanks 113 are thereafter placed together in a moulding tool and moulded simultaneously each by itself with the insulating envelopes 115 along the part of the springs intended for fastening. After the moulding operation the springs are cut off from each other due to the fact that the plates 114, which are not punched out, are cut away.
  • the funnel 16 arisen at the moulding operation is removed.
  • More than three contact spring blanks may of course be inserted simultaneously in the moulding tool and provided with individual insulating envelopes. Insulated springs in cakes or bands are thereby obtained. After the plates 114 and the funnel 116 have been removed these contact springs are connected by a thin layer of moulding compound between the insulating envelopes 115, said layer generally arising at the moulding operation. At the moulding one can of course also arrange beams of mouldmg compound, which keep the springs together.
  • the contact spring sets are then assembled by these connected spring bands and after the assembly the rests of the moulding compound, which exist between the insulatmg envelopes, are removed.
  • Such contact groups at which two or more contact springs are assembled beside each other it may be advantageous to punch out the spring blanks with that space, which they shall have in the group.
  • a number of connected contact springs may of course be piled on each other simultaneously and fastened together to a large group.
  • Said fastening of the insulating envelopes may take place through an especial method. This takes place in such a way that after assembly and squeezing together of said spring bands provided with individual insulation a pencilling or spraying of the insulating envelopes takes place by means of benzol or some other dissolvent. The benzol penetrates thereby capillarily and joins the group. together. The moulding compound remaining between the insulating envelopes is then removed.
  • the insulating envelopes may of course also be united by means of some suitable pasting-means, which is applicated on the surfaces-of the insulating envelopes lying against each other, before they are pressed together.
  • the method of making fiat contact springs for relay pile-ups and the like, and of the type having a flexible contact end, a terminal connector end and an intermediate portion for mounting of the spring in a pile-up said method being characterized by control of the spring tension in the intermediate portion, comprising: providing a contact spring of flat sheet metal having at least one aperture in its intermediate portion, supporting said spring with its intermediate portion in a moulding die recessed about the intermediate portion, contacting spaced points on opposite faces of the intermediate portion by fixed guide pins to define the plane occupied by the said intermediate portion, the guide pins contacting dilferent areas of the intermediate portion on its opposite faces, moulding insulation material in said die entirely about said intermediate portion including the wall surface of said aperture, and about said guide pins, and removing said contact spring from said die after said insulation material has hardened.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Manufacture Of Switches (AREA)
  • Contacts (AREA)
US2734257D 1950-05-05 jonsson Expired - Lifetime US2734257A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE699199X 1950-05-05

Publications (1)

Publication Number Publication Date
US2734257A true US2734257A (en) 1956-02-14

Family

ID=20315422

Family Applications (1)

Application Number Title Priority Date Filing Date
US2734257D Expired - Lifetime US2734257A (en) 1950-05-05 jonsson

Country Status (5)

Country Link
US (1) US2734257A (en(2012))
BE (1) BE503003A (en(2012))
FR (1) FR1049311A (en(2012))
GB (1) GB699199A (en(2012))
NL (1) NL75303C (en(2012))

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2856485A (en) * 1957-03-18 1958-10-14 Gen Electric Circuit controlling device
US2961752A (en) * 1954-12-15 1960-11-29 Ericsson Telefon Ab L M Installation for manufacturing contact spring assemblies
US2988606A (en) * 1957-12-19 1961-06-13 Cts Corp Electric switch and method of making
US3015876A (en) * 1957-06-18 1962-01-09 Gen Electric Method of making resilient switch contacts
US3039075A (en) * 1958-05-21 1962-06-12 Gen Electric Polarized attachment plug
US3126466A (en) * 1964-03-24 Modular leaf switch
US3194931A (en) * 1961-05-10 1965-07-13 American Radiator & Standard Improved block-electrical brush assembly
US3573414A (en) * 1969-04-14 1971-04-06 Western Electric Co Switch pile-ups
FR2337942A1 (fr) * 1976-01-12 1977-08-05 Philips Nv Procede pour la fabrication d'un constituant electrique a languettes

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB882850A (en) * 1959-05-27 1961-11-22 Controls Co Of America Improvements in and relating to snap action electrical switches and a process for making the switches
CN103839712A (zh) * 2012-11-20 2014-06-04 河南省电力公司焦作供电公司 隔离开关触指拆装装置

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB201092A (en) * 1922-07-17 1923-07-26 Fritz Aldendorff Method of manufacturing contact banks for electromechanical telephone systems and the like
US1689340A (en) * 1923-11-14 1928-10-30 Western Electric Co Selector switch
US1921430A (en) * 1930-06-19 1933-08-08 Bell Telephone Labor Inc Electromagnetic switching device
US2254720A (en) * 1938-06-16 1941-09-02 Automatic Signal Corp Insulated electrical contact
US2339434A (en) * 1941-11-28 1944-01-18 Kellogg Switchboard & Supply Contact-spring stack-up
US2350887A (en) * 1941-11-28 1944-06-06 Bell Telephone Labor Inc Method of manufacturing parts for electrical apparatus
US2373861A (en) * 1942-10-08 1945-04-17 Bell Telephone Labor Inc Method of making contact wiper springs
US2458552A (en) * 1943-12-20 1949-01-11 Bell Telephone Labor Inc Method of making electrical contacting elements
US2483024A (en) * 1945-03-03 1949-09-27 Casner Patents Inc Method of manufacturing dynamo-electric machines
US2670530A (en) * 1954-03-02 Method for making terminal strips

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2670530A (en) * 1954-03-02 Method for making terminal strips
GB201092A (en) * 1922-07-17 1923-07-26 Fritz Aldendorff Method of manufacturing contact banks for electromechanical telephone systems and the like
US1689340A (en) * 1923-11-14 1928-10-30 Western Electric Co Selector switch
US1921430A (en) * 1930-06-19 1933-08-08 Bell Telephone Labor Inc Electromagnetic switching device
US2254720A (en) * 1938-06-16 1941-09-02 Automatic Signal Corp Insulated electrical contact
US2339434A (en) * 1941-11-28 1944-01-18 Kellogg Switchboard & Supply Contact-spring stack-up
US2350887A (en) * 1941-11-28 1944-06-06 Bell Telephone Labor Inc Method of manufacturing parts for electrical apparatus
US2373861A (en) * 1942-10-08 1945-04-17 Bell Telephone Labor Inc Method of making contact wiper springs
US2458552A (en) * 1943-12-20 1949-01-11 Bell Telephone Labor Inc Method of making electrical contacting elements
US2483024A (en) * 1945-03-03 1949-09-27 Casner Patents Inc Method of manufacturing dynamo-electric machines

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3126466A (en) * 1964-03-24 Modular leaf switch
US2961752A (en) * 1954-12-15 1960-11-29 Ericsson Telefon Ab L M Installation for manufacturing contact spring assemblies
US2856485A (en) * 1957-03-18 1958-10-14 Gen Electric Circuit controlling device
US3015876A (en) * 1957-06-18 1962-01-09 Gen Electric Method of making resilient switch contacts
US2988606A (en) * 1957-12-19 1961-06-13 Cts Corp Electric switch and method of making
US3039075A (en) * 1958-05-21 1962-06-12 Gen Electric Polarized attachment plug
US3194931A (en) * 1961-05-10 1965-07-13 American Radiator & Standard Improved block-electrical brush assembly
US3573414A (en) * 1969-04-14 1971-04-06 Western Electric Co Switch pile-ups
FR2337942A1 (fr) * 1976-01-12 1977-08-05 Philips Nv Procede pour la fabrication d'un constituant electrique a languettes

Also Published As

Publication number Publication date
GB699199A (en) 1953-11-04
FR1049311A (fr) 1953-12-29
BE503003A (en(2012))
NL75303C (en(2012))

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