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WO1998047205A1 - Tiges de borne pour appareils electriques - Google Patents

Tiges de borne pour appareils electriques Download PDF

Info

Publication number
WO1998047205A1
WO1998047205A1 PCT/GB1998/001124 GB9801124W WO9847205A1 WO 1998047205 A1 WO1998047205 A1 WO 1998047205A1 GB 9801124 W GB9801124 W GB 9801124W WO 9847205 A1 WO9847205 A1 WO 9847205A1
Authority
WO
WIPO (PCT)
Prior art keywords
pin
impression
land
die
forming
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.)
Ceased
Application number
PCT/GB1998/001124
Other languages
English (en)
Inventor
John Crawshaw Taylor
Vincent Joseph Garvey
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.)
Strix Ltd
Original Assignee
Strix Ltd
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 Strix Ltd filed Critical Strix Ltd
Priority to AU70633/98A priority Critical patent/AU7063398A/en
Publication of WO1998047205A1 publication Critical patent/WO1998047205A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/465—Identification means, e.g. labels, tags, markings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/16—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for manufacturing contact members, e.g. by punching and by bending

Definitions

  • the present invention relates to terminal pins for electrical appliances, and in particular for electrical liquid heating appliances such as kettles and hot water jugs.
  • a kettle or hot water jug is provided with two or three terminal pins for engagement in a power socket connector.
  • the pins may be mounted in a power inlet for the appliance, or more usually form an integral part of a thermally responsive control unit for the appliance, such as one disclosed in GB 2181598.
  • a thermally responsive control unit for the appliance such as one disclosed in GB 2181598.
  • Such controls are susceptible to unauthorised copying. Such counterfeits are of poor quality and often dangerous, so it is of importance that a purchaser of a kettle or jug can establish that a genuine control has been used. In use the body of the control is concealed behind a cover, so it is not apparent if the control is genuine. There is thus a need for a simple way in which a purchaser of a kettle or jug can ascertain the origin of the control used. This is achieved in accordance with the invention by impressing on the pin a mark indicative of the manufacturer, as the pin will normally be visible to a user.
  • the invention provides a terminal pin for an electrical appliance wherein a surface of the pin is provided with an impression indicative of the origin of the pin.
  • the invention provides a thermally sensitive control unit for an electrical appliance, said unit comprising a terminal pin having a surface provided with an impression indicative of the origin of the pin.
  • the invention also extends to an electrical appliance having a pin or control in accordance with the invention.
  • the configurations of the appliance inlet and the connector are determined in accordance with national and international standards, depending on the type of appliance, the current to be handled by the coupling and the maximum temperature of the inlet pins .
  • the terminal pin should have a substantially planar surface surrounding the inscription permitting a surface contact with a socket connector to be achieved.
  • the impression is produced using a die having a land from which extend impression forming projections, and the die is pressed into the pin sufficiently for the land to come into contact with the surface of the pin around the impression.
  • the deformation of the pin surface is controlled by the land, preventing substantially the formation of ridges around the impression.
  • the land planishes the surface.
  • the land extends over a substantial part, and preferably over substantially all of the contact forming portion of the pin surface.
  • the die land may be made to extend over the whole contact surface of the pin.
  • the impression forming projection may be relatively shallow, for example less than 0.5mm, preferably around 0.25mm deep.
  • the sides of the projection are substantially parallel and at right angles to the land. This is in contrast to normal stamping dies which have tapering sides.
  • the advantage of using parallel sided impression means is that should, for whatever reason (for example tool-wear) , the die not complete a full stroke relative to the pin surface, the impression formed will still be of the requisite width.
  • the invention provides a method of making an impression on a terminal pin for an electrical appliance using a die having an impression forming projection upstanding from a land, the upstanding sides of said projection being substantially parallel to each other .
  • the impression may be formed on a finished pin, but for ease of manufacture, it is preferably formed before the pin is finished. Terminal pins are usually stamped out of strip material in a continuous multi stage process. Conveniently, therefore the impression may be formed on the strip material before the pins are stamped therefrom.
  • the impressing step may be suitably synchronised with the other steps in the process .
  • An impression may be formed on just one side of the pin, but preferably it is provided on both sides.
  • the inscription on the opposed sides are preferably inverted, so that irrespective of the orientation with which the pins are inserted in an inlet or a control housing, the impression will be legible.
  • Figure 1 shows a terminal pin in accordance with the invention
  • Figure 2 shows, schematically, a process for producing the pin of Figure 1;
  • Figure 3 shows, schematically, a first stage in the impression forming process taken along the line A-A of Figure 2;
  • Figure 4 shows a second stage in the impression 'forming process
  • Figure 5 shows a third stage in the impression forming process.
  • a terminal pin 2 for use in one of the applicant's control units, for example in one of its R7 series of controls is illustrated.
  • the pin has a contact portion for engaging in a socket connector and a mounting portion 6 for mounting the pin 2 in the control or an appliance inlet.
  • the outline shape of the pin is already known, and the cross sectional dimensions of its contact forming portion 4 are in accordance with standard No. 320 of the International Electrical Commission Sheets C15 and C16 (320 IEC 1981), i.e. 4mm ⁇ 0.1 by 2mm ⁇ 0.05.
  • An impression 8 of the Applicant's name is provided on both faces of the pin 2.
  • the impression on the underside of the pin is inverted with respect to the impression shown.
  • the terminal pin 2 is formed from a strip 10 of material, usually brass or copper.
  • the strip is fed off a roll, not shown, and passed through a number of manufacturing stages A to D in a progression tool .
  • the strip 10 is kept in registry through the various stages by virtue of index holes 12 which are punched in the strip at stage B.
  • Suitable indexing means engage in the index holes to move the strip in a stepwise manner through the progression tool.
  • the impression 8 is formed on the strip of material at stage A prior to the pins being blanked out from the strip 10 by a press tool at stage C and then finally being separated from the end of the strip at stage D.
  • the impression 8 is formed using a die 12.
  • the die 12 comprises upper and lower parts 14,16.
  • Each die part 14,16 comprises a land 18 from which are upstanding impression forming projections 20.
  • the outline of the land 18 is illustrated in phantom in Figure 2, form which it can be seen that it extends over substantially the whole of the contact forming part 4 of the pin 2.
  • the projections are relatively shallow, being around 0.25mm deep, and the sides 24 of the projection are substantially parallel and perpendicular to the land 18.
  • the die parts 14, 16 are brought together by appropriate press means so that the projections 20 press into the surface 22 of the strip 10.
  • the die parts 14,16 are moved together to the extent that the land 18 surrounding the projections 20 on both die parts are pressed against the surface of the strip 10 around the impression 8 being formed so as to control distortion of that surface.
  • that surface is maintained substantially flat. If the land does not quite contact the pin surface 22, the impression 8 will still be of the requisite width, since the sides 24 of the impression forming part of the die are parallel .
  • the die parts 14, 16 can then be separated as shown in Figure 5, and the strip 10 then indexed through the machine for the next impression 8 to be made. It will be appreciated that various modifications may be made to the above embodiment without departing from the scope of the invention. For example, the impressions for more than one pin may be produced at one time.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacturing Of Electrical Connectors (AREA)

Abstract

L'invention concerne une tige de borne (2) pour appareil électrique. Une surface de la tige comporte une indication imprimée (8) renseignant sur l'origine de la tige. Autour de l'impression, la surface de la tige est sensiblement plate, permettant le contact électrique approprié avec une broche de connexion. On parvient à ce résultat en appliquant à la surface de la tige une matrice de timbrage sur laquelle l'impression fait saillie par rapport à un plan de base, moyennant quoi la matrice est appliquée de sorte que ledit plan entre en contact avec la surface de la tige et contrôle la déformation de cette surface autour de l'impression en saillie.
PCT/GB1998/001124 1997-04-17 1998-04-17 Tiges de borne pour appareils electriques Ceased WO1998047205A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU70633/98A AU7063398A (en) 1997-04-17 1998-04-17 Terminal pins for electrical appliances

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9707789.5 1997-04-17
GBGB9707789.5A GB9707789D0 (en) 1997-04-17 1997-04-17 Terminal pins for eletrical appliances

Publications (1)

Publication Number Publication Date
WO1998047205A1 true WO1998047205A1 (fr) 1998-10-22

Family

ID=10810938

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1998/001124 Ceased WO1998047205A1 (fr) 1997-04-17 1998-04-17 Tiges de borne pour appareils electriques

Country Status (3)

Country Link
AU (1) AU7063398A (fr)
GB (1) GB9707789D0 (fr)
WO (1) WO1998047205A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002005390A1 (fr) * 2000-07-03 2002-01-17 Leopold Kostal Gmbh & Co. Kg Dispositif de fabrication de parties de contact electriques

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4269090A (en) * 1979-08-01 1981-05-26 Swisstronics, Inc. Method and apparatus for marking miniature turned parts
GB2165100A (en) * 1984-09-25 1986-04-03 Nicholas Michael Manley Identifying pins of domestic power plugs
GB2181598A (en) * 1985-10-04 1987-04-23 Strix Ltd Thermally-sensitive controls
WO1989007846A1 (fr) * 1988-02-18 1989-08-24 Trw Daut + Rietz Gmbh & Co. Kg Ressort a lame de contact pour fiches de connecteurs electriques et son procede de production

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4269090A (en) * 1979-08-01 1981-05-26 Swisstronics, Inc. Method and apparatus for marking miniature turned parts
GB2165100A (en) * 1984-09-25 1986-04-03 Nicholas Michael Manley Identifying pins of domestic power plugs
GB2181598A (en) * 1985-10-04 1987-04-23 Strix Ltd Thermally-sensitive controls
WO1989007846A1 (fr) * 1988-02-18 1989-08-24 Trw Daut + Rietz Gmbh & Co. Kg Ressort a lame de contact pour fiches de connecteurs electriques et son procede de production

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002005390A1 (fr) * 2000-07-03 2002-01-17 Leopold Kostal Gmbh & Co. Kg Dispositif de fabrication de parties de contact electriques

Also Published As

Publication number Publication date
GB9707789D0 (en) 1997-06-04
AU7063398A (en) 1998-11-11

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