US2729797A - Plug for electrical apparatus - Google Patents

Plug for electrical apparatus Download PDF

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Publication number
US2729797A
US2729797A US456899A US45689954A US2729797A US 2729797 A US2729797 A US 2729797A US 456899 A US456899 A US 456899A US 45689954 A US45689954 A US 45689954A US 2729797 A US2729797 A US 2729797A
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US
United States
Prior art keywords
plug
protection cap
insulating body
support
electrical apparatus
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
US456899A
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English (en)
Inventor
Kobler Victor
Kobler Werner
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.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US2729797A publication Critical patent/US2729797A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01R13/60—Means for supporting coupling part when not engaged

Definitions

  • the present invention relates to plugs for electrical apparatus, and more particularly to such plugs, which are provided with a protection cap for sensitive parts of the apparatus.
  • Such plugs often have the disadvantage, that due to the protection cap, which usually is fixed within the range of the plug contacts, they may not be inserted into the corresponding sockets.
  • This disadvantage occurs not only with plugs having pins, which are to be inserted into the bushings of countersunk sockets, but particularly with plugs having so-called bayonet armatures, as they are common in certain countries.
  • the present invention has as its object the provision of a plug, with which the disadvantage mentioned is avoided.
  • the plug is characterized in that the protection cap and the insulating body of the plug, having at its one end the plug contacts, form two separate parts, a support being slidable on the insulating body and on the current supply cable leaving the latter.
  • Figs. 1 and 2 show perspectively the first embodiment, the protection cap being in its position of use and its out of-use position respectively.
  • FIG. 3 and 4 the second embodiment in analogous positions to Figs. 1 and 2, and
  • Fig. 5 the insulating body of the second embodiment with a fragmentary axial section.
  • the plug shown in Figs. 1 and 2 has an insulating body 1, carrying in a known manner the plug pins 2 as well as a protection cap 3 being formed as a separate part, which in the present case serves for the protection of the cutter-head of an electrical dry-shaver.
  • the protection cap being integral with a sliding sleeve 4, suitably consists of a soft rubber, while the insulating body 1 consists of a hard insulating material e. g. synthetic material.
  • the sleeve 4 carrying the protection cap is slidably guided on the insulating body 1 and on the cable 5, emerging from the latter. Therefore the protection cap 3 extending at right angles from one of the longitudinal sides of the insulating body, can be displaced from its position of use (Fig.
  • the plug shown in Figs. 3-5 is one serving for connection to connecting sockets having bayonet armatures as they are usual in different countries, e. g. Australia.
  • the plug body 6a, 6b and the protection cap 7 with its support 8 are formed as separate parts.
  • the plug body for instance consisting of electrically properly insulating, hard synthetic material comprises a cylindrical head portion 6a, having at its face side the two contacts 9 and at its circumference two bayonet engaging pins 14, and a flat shaft portion 6b. In the latter the terminals 10 are provided, in which the strands of the current supply cable are held by means of screws 12.
  • the shaft portion 6b and the cable end emerging from the latter are enclosed by a cover 13 of insulating material.
  • the plug body With its shaft portion 6b enclosed by the cover 13, the plug body is inserted in a corresponding opening 15 of the protection cap-support 8 in the position of use of the protection cap 7, in which the latter according to Fig. 3 protects the cutter head of an electrical dry-shaver.
  • This support 8 can be slid back from the shaft portion 6b of the plug body onto the cable 11 together with the protection cap 7.
  • the protection cap 7 can no more obstruct the insertion of the contact carrier 6a into the connecting socket in this position.
  • the cover 13 prevents the user from getting into contact with the current carrying parts of the shaft 6b.
  • plugs are provided, the contact carriers of which, taking up relatively little space when the plug is not in use, form a compact unit with the protection cap, while the latter, when using the plug, can he slid back to such an extent over the cable that the plug may be properly applied.
  • a plug for electrical apparatus comprising an insulating body, plug contacts at one end of said insulating body, a protection cap for sensitive apparatus parts and a cap support slidably arranged on said insulating body, said protection cap and said insulating body being formed as separate parts, said cap support having a recess, said protection cap and its support being movable from one position in which the insulating plug body is nested within said recess in said cap support and said cap is arranged adjacent the contact carrying portion of said body to a second position away from said contact carrying portion of said insulating body.
  • a plug according to claim 1 wherein said insulating body is provided with plug pins for insertion in corresponding bushings of a socket and said support of the protection cap having sleevelike configuration is slidable on the insulating body such that the protection cap extending at right angles from said support, in its position of use is arranged in the range of the face side of the insulating body carrying the plug pins.

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  • Connector Housings Or Holding Contact Members (AREA)
US456899A 1953-09-29 1954-09-20 Plug for electrical apparatus Expired - Lifetime US2729797A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH766844X 1953-09-29

Publications (1)

Publication Number Publication Date
US2729797A true US2729797A (en) 1956-01-03

Family

ID=4535106

Family Applications (1)

Application Number Title Priority Date Filing Date
US456899A Expired - Lifetime US2729797A (en) 1953-09-29 1954-09-20 Plug for electrical apparatus

Country Status (4)

Country Link
US (1) US2729797A (de)
CH (1) CH318596A (de)
DE (1) DE953542C (de)
GB (1) GB766844A (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2851668A (en) * 1954-09-17 1958-09-09 Kobler Werner Plug with separable protection cap
US3161450A (en) * 1961-10-17 1964-12-15 Gen Time Corp Pilferproof wall plug
US4827329A (en) * 1985-10-05 1989-05-02 Telefunken Electronic Gmbh Semiconductor array
US5589665A (en) * 1994-06-07 1996-12-31 Scamacca; Randal Child-resistant electrical outlet cover
US5803764A (en) * 1996-12-26 1998-09-08 The Reel-Thing Innovations Inc. Method of weather proofing an opening through which an electrical cord passes, and associated apparatus
US5997320A (en) * 1998-02-11 1999-12-07 Demello; Dana A. Trailer light harness storage and protector caddy

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4191917A (en) * 1977-08-25 1980-03-04 Disston, Inc. Battery pack rechargeable in recessed or flush-type receptacles
GB9006060D0 (en) * 1990-03-17 1990-05-16 Forey William E Holding device for domestic electrical plugs

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2182446A (en) * 1935-04-26 1939-12-05 Hoover Co Electrical connector
US2350048A (en) * 1940-07-10 1944-05-30 Kobler Victor Electric dry-shaving apparatus having a shearing head guard
US2383031A (en) * 1943-10-25 1945-08-21 Lyle Alcumbrack Combined electric razor casing and cord support

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2182446A (en) * 1935-04-26 1939-12-05 Hoover Co Electrical connector
US2350048A (en) * 1940-07-10 1944-05-30 Kobler Victor Electric dry-shaving apparatus having a shearing head guard
US2383031A (en) * 1943-10-25 1945-08-21 Lyle Alcumbrack Combined electric razor casing and cord support

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2851668A (en) * 1954-09-17 1958-09-09 Kobler Werner Plug with separable protection cap
US3161450A (en) * 1961-10-17 1964-12-15 Gen Time Corp Pilferproof wall plug
US4827329A (en) * 1985-10-05 1989-05-02 Telefunken Electronic Gmbh Semiconductor array
US5589665A (en) * 1994-06-07 1996-12-31 Scamacca; Randal Child-resistant electrical outlet cover
US5803764A (en) * 1996-12-26 1998-09-08 The Reel-Thing Innovations Inc. Method of weather proofing an opening through which an electrical cord passes, and associated apparatus
US5997320A (en) * 1998-02-11 1999-12-07 Demello; Dana A. Trailer light harness storage and protector caddy

Also Published As

Publication number Publication date
GB766844A (en) 1957-01-23
CH318596A (de) 1957-01-15
DE953542C (de) 1956-12-06

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