GB190428920A - A Thermostatic Device for Indicating when Motor-car or other Lamps are Extinguished - Google Patents
A Thermostatic Device for Indicating when Motor-car or other Lamps are ExtinguishedInfo
- Publication number
- GB190428920A GB190428920A GB190428920DA GB190428920A GB 190428920 A GB190428920 A GB 190428920A GB 190428920D A GB190428920D A GB 190428920DA GB 190428920 A GB190428920 A GB 190428920A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lamp
- contact
- car
- extinguished
- lamps
- 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
Landscapes
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Abstract
28,920. List, W., and Ritchie, F. Dec. 30. Signals, automatic-alarm.-Consists of a thermostatic device in which the unequal expansion of two metals causes an electric circuit to be made or broken when a lamp goes out, and is especially applicable to motor car lamps. The signal may be a lamp, bell, or indicator, and in the case of the motor car the ignition circuit may be broken so that the car comes to a stop, on the extinction of the lamp. Fig. 4 is a front view of the apparatus as attached to a lamp. The frame alpha has at one end a contact-chamber b shown in section in Fig. 1, and at the other two nuts c. Attached to it at d is a compound bar e, composed of two metals, the lower of which expands more than the upper, so that, when the bar is heated from below by the flame, the contact f is raised. When the lamp is extinguished, the contact f falls and makes contact with the contact-screw g. This screw g can be adjusted so as to regulate the period of time in which the contacts open or close.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB190428920T | 1904-12-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB190428920A true GB190428920A (en) | 1905-02-02 |
Family
ID=32192798
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB190428920D Expired GB190428920A (en) | 1904-12-30 | 1904-12-30 | A Thermostatic Device for Indicating when Motor-car or other Lamps are Extinguished |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB190428920A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2452942A (en) * | 1945-02-26 | 1948-11-02 | Protect O Farm Company | Temperature alarm system |
-
1904
- 1904-12-30 GB GB190428920D patent/GB190428920A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2452942A (en) * | 1945-02-26 | 1948-11-02 | Protect O Farm Company | Temperature alarm system |
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