GB2163842A - Lamp with housing rotatable with respect to cable - Google Patents

Lamp with housing rotatable with respect to cable Download PDF

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Publication number
GB2163842A
GB2163842A GB8520858A GB8520858A GB2163842A GB 2163842 A GB2163842 A GB 2163842A GB 8520858 A GB8520858 A GB 8520858A GB 8520858 A GB8520858 A GB 8520858A GB 2163842 A GB2163842 A GB 2163842A
Authority
GB
United Kingdom
Prior art keywords
housing
cable
light
emitting diode
lamp
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.)
Granted
Application number
GB8520858A
Other versions
GB8520858D0 (en
GB2163842B (en
Inventor
Helmut Heiduck
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.)
Herion Werke KG
Original Assignee
Herion Werke KG
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 Herion Werke KG filed Critical Herion Werke KG
Publication of GB8520858D0 publication Critical patent/GB8520858D0/en
Publication of GB2163842A publication Critical patent/GB2163842A/en
Application granted granted Critical
Publication of GB2163842B publication Critical patent/GB2163842B/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2111/00—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Led Device Packages (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Insertion, Bundling And Securing Of Wires For Electric Apparatuses (AREA)

Abstract

A lamp is described, in particular for use as indicator lamps in electrical and electronic circuits, comprising a substantially transparent housing (12) in which is disposed e.g. a light-emitting diode (20) connected to a cable (26). The housing (12) is adapted to be freely rotatable with respect to the cable (26) so that twisting of the cable is avoided on screwing the housing into a socket. The light-emitting diode may be mounted in a socket (22) also freely rotatable in the housing (12), the socket (22) housing an extension (28) to separate and engage between wires (24) in the cable (28). By this means compressive stress on the light-emitting diode (20) is avoided. A freely rotatable cable clamp (30) avoids tensile stress on the light-emitting diode (20). <IMAGE>

Description

SPECIFICATION Lamp This invention relates to lamps, and is particularly applicable to indicating lamps to indicate the operating state of an electrical or electronic circuit.
Such indicating lamps commonly comprise a housing of a substantially transparent material provided with a connecting thread as well as at least one light-emitting diode disposed therein with a connecting cable leading out of the housing.
Indicating lamps of the above-mentioned type are frequently used for operational checks in electrical and electronic circuits and they are used in control panels, for example, particularly in mining, in order to check the operation of the circuit in question after a fault has been eliminated.
For this purpose, the indicating lamps, which are provided with an external thread, for example, are screwed into a screw connection with a fixed female thread, for the purpose of the connection.
Hitherto, it was a disadvantage in this case that the connecting cables of these indicating lamps were twisted during the screwing in.
It is therefore an object of this invention to construct an indicating lamp such that twisting of the cable during the screwing in is avoided.
According to this invention, this is achieved in that the housing is adapted for free rotation in relation to the connecting cable.
In this case, the light-emitting diode is mounted in a holder which has adequate play in the housing of the light-emitting diode.
The connecting cable leading out of the housing may appropriately be provided with a cable clamp which is supported on the housing to relieve tension, although the housing is also rotatable in relation to the cable clamp.
One form of embodiment of the invention will be explained below by way of example with reference to the single figure of the drawing which shows an indicating lamp in section.
The indicating lamp 10 comprises a housing 12 of a light-transmissive plastics material. The housing 12 is provided with a hexagon 16, a suitable flange 18 and an external thread 14 so that it can be screwed into a female thread (not illustrated) of the circuit to be tested, a seal possibly being inserted between the flange 18 and the end face of the female thread.
A light-emitting diode 20 in the required luminous colour is disposed in the interior of the housing 12. If necessary, a plurality of light-emitting diodes in various luminous colours may also be provided.
The light-emitting diode 20 is mounted in a socket 22 which is inserted with play in the housing 12 and may bear against a shoulder 40 of the housing but is not otherwise connected to the housing.
If colourless light-emitting diodes are used, recognition is possible for example by means of a coloured socket 22.
The light-emitting diode 20 is equipped with connecting wires 24 which form a connecting cable 26 which is taken out of the housing 12.
As the Figure shows, the socket 22 is provided with an extension 28 which extends axially and reaches in between the two connecting wires 24 and separate these from one another, on the one hand acting as insulation between the two connecting wires 24 and on the other hand taking up any forces, particularly compressive forces, acting on the connecting wires or the cable.
Inserted in the connecting end of the housing 12 is a bush 32 which comprises a radial flange 34 which forms a support for a cable clamp 30 which is disposed inside the housing and is connected to the cable 26, for example being clamped on the cable, in order to protect the light-emitting diode 20 from tensile loading coming from the outside.
The bush 32 may appropriately be secured in the open end of the housing 12 by adhesion. It has a central aperture for the passage of the cable 26.
After the bush 32 has been inserted in the housing 12, the cable clamp 30 can rest on the flange 34 of the bush 32.
There is, however, no further connection between the connecting cable 26 and the cable clamp 30 on the one hand and the bush 32 on the other hand.
The housing is therefore freely rotatable in relation to the light-emitting diode 20, its socket 22, the cable clamp 30 and the connecting cable 26.
This means that if the housing 12 is screwed by its thread 14 into a female thread of a screw connection of a circuit to be tested, the connecting cable 26 is not twisted during the screwing in of the housing 12.
In order to increase the luminous power, the wall of the housing 12 is constructed in the form of a lens 36 in the region above the light-emitting diode 20 and the wall of the space 42 into which the light-emitting diode 20 projects, is equipped with ribs 38 extending longitudinally.
The housing 12, the socket 22 and the bush 32 consist of suitable, electrically insulating plastics materials.
The indicating lamp is suitable for so-called intrinsically safe circuits for example, particularly for mining.
Although described in relation to use of lightemitting diodes other light-emitting means are encompassed by this invention.
1. A lamp comprising a housing of substantially transparent material, and light-emitting means disposed therein with a connection cable leading out of the housing, characierised in that the housing is adapted for rotation in relation to the connection cable.
2. A lamp as claimed in claim 1 in which the light-emitting means is secured in a socket freely rotatable with respect to the housing, the socket being provided with an extension which separates and engages between connecting wires of the connection cable.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (5)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Lamp This invention relates to lamps, and is particularly applicable to indicating lamps to indicate the operating state of an electrical or electronic circuit. Such indicating lamps commonly comprise a housing of a substantially transparent material provided with a connecting thread as well as at least one light-emitting diode disposed therein with a connecting cable leading out of the housing. Indicating lamps of the above-mentioned type are frequently used for operational checks in electrical and electronic circuits and they are used in control panels, for example, particularly in mining, in order to check the operation of the circuit in question after a fault has been eliminated. For this purpose, the indicating lamps, which are provided with an external thread, for example, are screwed into a screw connection with a fixed female thread, for the purpose of the connection. Hitherto, it was a disadvantage in this case that the connecting cables of these indicating lamps were twisted during the screwing in. It is therefore an object of this invention to construct an indicating lamp such that twisting of the cable during the screwing in is avoided. According to this invention, this is achieved in that the housing is adapted for free rotation in relation to the connecting cable. In this case, the light-emitting diode is mounted in a holder which has adequate play in the housing of the light-emitting diode. The connecting cable leading out of the housing may appropriately be provided with a cable clamp which is supported on the housing to relieve tension, although the housing is also rotatable in relation to the cable clamp. One form of embodiment of the invention will be explained below by way of example with reference to the single figure of the drawing which shows an indicating lamp in section. The indicating lamp 10 comprises a housing 12 of a light-transmissive plastics material. The housing 12 is provided with a hexagon 16, a suitable flange 18 and an external thread 14 so that it can be screwed into a female thread (not illustrated) of the circuit to be tested, a seal possibly being inserted between the flange 18 and the end face of the female thread. A light-emitting diode 20 in the required luminous colour is disposed in the interior of the housing 12. If necessary, a plurality of light-emitting diodes in various luminous colours may also be provided. The light-emitting diode 20 is mounted in a socket 22 which is inserted with play in the housing 12 and may bear against a shoulder 40 of the housing but is not otherwise connected to the housing. If colourless light-emitting diodes are used, recognition is possible for example by means of a coloured socket 22. The light-emitting diode 20 is equipped with connecting wires 24 which form a connecting cable 26 which is taken out of the housing 12. As the Figure shows, the socket 22 is provided with an extension 28 which extends axially and reaches in between the two connecting wires 24 and separate these from one another, on the one hand acting as insulation between the two connecting wires 24 and on the other hand taking up any forces, particularly compressive forces, acting on the connecting wires or the cable. Inserted in the connecting end of the housing 12 is a bush 32 which comprises a radial flange 34 which forms a support for a cable clamp 30 which is disposed inside the housing and is connected to the cable 26, for example being clamped on the cable, in order to protect the light-emitting diode 20 from tensile loading coming from the outside. The bush 32 may appropriately be secured in the open end of the housing 12 by adhesion. It has a central aperture for the passage of the cable 26. After the bush 32 has been inserted in the housing 12, the cable clamp 30 can rest on the flange 34 of the bush 32. There is, however, no further connection between the connecting cable 26 and the cable clamp 30 on the one hand and the bush 32 on the other hand. The housing is therefore freely rotatable in relation to the light-emitting diode 20, its socket 22, the cable clamp 30 and the connecting cable 26. This means that if the housing 12 is screwed by its thread 14 into a female thread of a screw connection of a circuit to be tested, the connecting cable 26 is not twisted during the screwing in of the housing 12. In order to increase the luminous power, the wall of the housing 12 is constructed in the form of a lens 36 in the region above the light-emitting diode 20 and the wall of the space 42 into which the light-emitting diode 20 projects, is equipped with ribs 38 extending longitudinally. The housing 12, the socket 22 and the bush 32 consist of suitable, electrically insulating plastics materials. The indicating lamp is suitable for so-called intrinsically safe circuits for example, particularly for mining. Although described in relation to use of lightemitting diodes other light-emitting means are encompassed by this invention. CLAIMS
1. A lamp comprising a housing of substantially transparent material, and light-emitting means disposed therein with a connection cable leading out of the housing, characierised in that the housing is adapted for rotation in relation to the connection cable.
2. A lamp as claimed in claim 1 in which the light-emitting means is secured in a socket freely rotatable with respect to the housing, the socket being provided with an extension which separates and engages between connecting wires of the connection cable.
3. A lamp as claimed in claims 1 or 2 in which the connection cable is provided with a cable clamp which is freely rotatable and supported in the housing.
4. A lamp as claimed in claim 3 in which the housing is provided with a lens and internal ribs to improve luminous power.
5. A lamp as claimed in claim 1 and substantially as described with reference to the drawing.
GB8520858A 1984-08-29 1985-08-20 Lamp with housing rotatable with respect to cable Expired GB2163842B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19848425589 DE8425589U1 (en) 1984-08-29 1984-08-29 INDICATOR LIGHT

Publications (3)

Publication Number Publication Date
GB8520858D0 GB8520858D0 (en) 1985-09-25
GB2163842A true GB2163842A (en) 1986-03-05
GB2163842B GB2163842B (en) 1987-10-07

Family

ID=6770242

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8520858A Expired GB2163842B (en) 1984-08-29 1985-08-20 Lamp with housing rotatable with respect to cable

Country Status (4)

Country Link
BE (1) BE903127A (en)
DE (1) DE8425589U1 (en)
FR (1) FR2569823B3 (en)
GB (1) GB2163842B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9404472U1 (en) * 1994-03-16 1994-05-11 Siemens Nixdorf Inf Syst Ready indicator
DE19628756A1 (en) * 1996-07-17 1998-01-22 Abb Patent Gmbh Lighting insert
DE29708858U1 (en) * 1997-05-20 1997-07-31 Ebt Licht Technik Gmbh & Co Kg Display element

Also Published As

Publication number Publication date
BE903127A (en) 1985-12-16
FR2569823B3 (en) 1986-10-17
DE8425589U1 (en) 1984-11-22
GB8520858D0 (en) 1985-09-25
GB2163842B (en) 1987-10-07
FR2569823A1 (en) 1986-03-07

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee