GB327480A - Improvements in electric lighting fittings - Google Patents
Improvements in electric lighting fittingsInfo
- Publication number
- GB327480A GB327480A GB164729A GB164729A GB327480A GB 327480 A GB327480 A GB 327480A GB 164729 A GB164729 A GB 164729A GB 164729 A GB164729 A GB 164729A GB 327480 A GB327480 A GB 327480A
- Authority
- GB
- United Kingdom
- Prior art keywords
- globe
- bulb
- contacts
- contact
- guard
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V25/00—Safety devices structurally associated with lighting devices
- F21V25/02—Safety devices structurally associated with lighting devices coming into action when lighting device is disturbed, dismounted, or broken
- F21V25/04—Safety devices structurally associated with lighting devices coming into action when lighting device is disturbed, dismounted, or broken breaking the electric circuit
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V25/00—Safety devices structurally associated with lighting devices
- F21V25/02—Safety devices structurally associated with lighting devices coming into action when lighting device is disturbed, dismounted, or broken
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V25/00—Safety devices structurally associated with lighting devices
- F21V25/12—Flameproof or explosion-proof arrangements
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Fastening Of Light Sources Or Lamp Holders (AREA)
Abstract
327,480. Engineering & Lighting Equipment Co., Ltd., and Bird, W. Jan. 17, 1929. Cut-out arrangements. - In safety lighting fittings of the kind wherein the contacts H of bulb-holder are held in contact with the supply terminals C by the globe and are adapted to be forced out of contact to break the lamp circuit by a spring 0 when the globe S or the bulb G is broken, the contacts C, H are enclosed in an airtight sleeve or bellows diaphragm Q attached to the relatively movable parts B, E that carry the contacts. In the construction shown in Fig. 1, the globe is forced into gastight contact with the plate K that carries the bulb-holder by means of a guard V adapted to screw into the casing A of the fitting, a resilient block X carried by a swivel Y, Fig. 3, being interposed between the guard and the globe, or the guard may be pivoted to the casing and the swivel replaced by a screw. In its contact making and breaking positions the plate K makes gastight engagement with internal flanges N, P respectively. The plate is guided by pins R. In the construction shown in Figs. 3 and 4, the globe is secured by clamps F<1> to a piston A<1> having a clearance in the casing A for the passage of gas from a broken bulb, so that the gas is cooled before it escapes from the fitting; holes Z are also provided. In the construction shown in Fig. 4, the part of the piston that carries the bulb-holder is separate from the part that carries the globe and is separately controlled by an additional spring D<1> so that the lamp circuit may be broken if either the globe or the bulb be damaged. In this case the contacts C, H are held in engagement by a spring E' interposed between the globe and the bulb.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB164729A GB327480A (en) | 1929-01-17 | 1929-01-17 | Improvements in electric lighting fittings |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB164729A GB327480A (en) | 1929-01-17 | 1929-01-17 | Improvements in electric lighting fittings |
Publications (1)
Publication Number | Publication Date |
---|---|
GB327480A true GB327480A (en) | 1930-04-10 |
Family
ID=9725571
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB164729A Expired GB327480A (en) | 1929-01-17 | 1929-01-17 | Improvements in electric lighting fittings |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB327480A (en) |
-
1929
- 1929-01-17 GB GB164729A patent/GB327480A/en not_active Expired
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