GB2307112A - Insulated lampholder pin - Google Patents

Insulated lampholder pin Download PDF

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Publication number
GB2307112A
GB2307112A GB9522713A GB9522713A GB2307112A GB 2307112 A GB2307112 A GB 2307112A GB 9522713 A GB9522713 A GB 9522713A GB 9522713 A GB9522713 A GB 9522713A GB 2307112 A GB2307112 A GB 2307112A
Authority
GB
United Kingdom
Prior art keywords
lampholder
pin
insulated
inner body
spring
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.)
Withdrawn
Application number
GB9522713A
Other versions
GB9522713D0 (en
Inventor
Stephen William Chamberlain
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
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 Individual filed Critical Individual
Priority to GB9522713A priority Critical patent/GB2307112A/en
Publication of GB9522713D0 publication Critical patent/GB9522713D0/en
Publication of GB2307112A publication Critical patent/GB2307112A/en
Withdrawn legal-status Critical Current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
    • H01R33/00—Coupling devices specially adapted for supporting apparatus and having one part acting as a holder providing support and electrical connection via a counterpart which is structurally associated with the apparatus, e.g. lamp holders; Separate parts thereof
    • H01R33/945—Holders with built-in electrical component
    • H01R33/96—Holders with built-in electrical component with switch operated by engagement or disengagement of coupling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R33/00—Coupling devices specially adapted for supporting apparatus and having one part acting as a holder providing support and electrical connection via a counterpart which is structurally associated with the apparatus, e.g. lamp holders; Separate parts thereof
    • H01R33/05—Two-pole devices
    • H01R33/46—Two-pole devices for bayonet type base

Landscapes

  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)

Abstract

Two insulated lampholder pins are mounted in an existing type of bayonet lampholder. The pins are designed to be electrically disconnected until a bulb is installed into the lampholder. Each pin has an electrically conducting outer body to which a wire is screw attached and a spring-urged metal Y and insulating X inner body. When a bulb is absent, the outer body makes contact with the insulating part of the inner body at point X and hence the metal end Y of the inner body is isolated. An inserted lamp pushes the inner body against the spring so that the outer body contacts the inner body at point Y to interconnect it with the cable. The spring pressure would be such that it would allow a lamp to be inserted into the lampholder but would be too great as to allow a finger to push the pin in.

Description

INSULATED LAMPHOLDER PIN THIS INVENTION RELATES TO AN INSULATED LAMPHOLDER PIN.
Existing lampholder pins are universally used in bayonet type electrical lampholders.There are usually two pins fitted to each lampholder. They are used as a way of connecting a cable flex to a bulb. They are all basically the same design and are quite safe as long as the bulb is installed in the lampholder. A potential shock hazard arises when a bulb is removed though,as the pins become exposed and can become 'live'.
According to the present invention there is provided an insulated lampholder pin comprising an outer cylindrical body, an inner cylindrical body (sliding pin), a heavy duty spring, a spring retainer cap and a screw.
A specific embodiment of the invention will now be described by way of example with reference to the accompanied drawings which are listed on page 2.
FIGURE 1 SHOWS THE OUTER CYLINDRICAL BODY.
FIGURE 2 SHOWS THE INNER CYLINDRICAL BODY.
FIGURE 3 SHOWS THE HEAVY DUTY SPRING.
FIGURE 4 SHOWS THE SPRING RETAINER CAP.
FIGURE 5 SHOWS THE THE 'CABLE SECURING' SCREW.
FIGURE 6 SHOWS THE INSULATED LAMPHOLDER PIN ASSEMBLED.
FIGURE 7 SHOWS THE INSULATED LAMPHOLDER PIN IN AN INSULATED STATE.
FIGURE 8 SHOWS THE INSULATED LAMPHOLDER PIN IN A CONDUCTING STATE.
The outer cylindrical body contains the screw connection point for the cable and is made entirely of metal e.g brass.The inner cylindrical body slides inside the outer body and is made of metal e.g brass and a suitable insulating material e.g plastic.
The inner cylindrical body is spring tensioned. (When the two complete insulated lampholder pins are fitted to a lampholder the outer bodies would be concealed behind the plastic moulding of the lampholder).
Details from Figures 2,3 and 4 are fitted into the detail of Figure 1.

Claims (1)

  1. CLAIM
    1. An insulated lampholder pin comprising an outer cylindrical body,an inner cylindrical body,a spring,a spring retainer cap and screw,so designed as to allow the spring tensioned inner body to move in or out of the outer body and hence connect or disconnect the electrical current to the tip of the inner body.
GB9522713A 1995-11-06 1995-11-06 Insulated lampholder pin Withdrawn GB2307112A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9522713A GB2307112A (en) 1995-11-06 1995-11-06 Insulated lampholder pin

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9522713A GB2307112A (en) 1995-11-06 1995-11-06 Insulated lampholder pin

Publications (2)

Publication Number Publication Date
GB9522713D0 GB9522713D0 (en) 1996-01-10
GB2307112A true GB2307112A (en) 1997-05-14

Family

ID=10783462

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9522713A Withdrawn GB2307112A (en) 1995-11-06 1995-11-06 Insulated lampholder pin

Country Status (1)

Country Link
GB (1) GB2307112A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2319902A (en) * 1996-11-23 1998-06-03 Lilley & Son Limited S Insulating sleeve lampholder

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB459440A (en) * 1935-07-02 1937-01-04 Gen Electric Co Ltd Improvements in or relating to bayonet type electric lampholders
GB1415841A (en) * 1972-01-11 1975-11-26 Imp Metal Ind Kynoch Ltd Lampholder contact mechanism

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB459440A (en) * 1935-07-02 1937-01-04 Gen Electric Co Ltd Improvements in or relating to bayonet type electric lampholders
GB1415841A (en) * 1972-01-11 1975-11-26 Imp Metal Ind Kynoch Ltd Lampholder contact mechanism

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2319902A (en) * 1996-11-23 1998-06-03 Lilley & Son Limited S Insulating sleeve lampholder
GB2319902B (en) * 1996-11-23 2000-12-13 Lilley & Son Ltd S Insulating sleeve lampholder

Also Published As

Publication number Publication date
GB9522713D0 (en) 1996-01-10

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)