GB217834A - Improvements in transmitters for mine signalling apparatus - Google Patents
Improvements in transmitters for mine signalling apparatusInfo
- Publication number
- GB217834A GB217834A GB2766723A GB2766723A GB217834A GB 217834 A GB217834 A GB 217834A GB 2766723 A GB2766723 A GB 2766723A GB 2766723 A GB2766723 A GB 2766723A GB 217834 A GB217834 A GB 217834A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pawl
- rod
- catch
- rack
- pull
- 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
- 230000011664 signaling Effects 0.000 title abstract 2
- ORILYTVJVMAKLC-UHFFFAOYSA-N Adamantane Natural products C1C(C2)CC3CC1CC2C3 ORILYTVJVMAKLC-UHFFFAOYSA-N 0.000 abstract 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Mounting Of Printed Circuit Boards And The Like (AREA)
Abstract
217,834. Adam, J., and Adam, G. Dec. 2, 1922. Mechanical telegraphs; mine and colliery signals.- Transmitting devices for use in mechanical mine signalling apparatus such as that described in Specification 217,423, from which the present application has been divided are of the kind in which a pawl on the pull-rod engages a rack to prevent a subsequent pull being given, unless the pull-rod has been pulled through a full stroke, and comprise the use of a fixed rack and a catch adapted normally to hold the pawl out of engagement. The apparatus comprises a rod 8 connected by a wire 10 to the receiver or indicator and by a wire 10<a> to the transmitting lever, and provided with a pawl 12 weighted at 12a and adapted to engage a fixed rack 14 until the rod has been pulled a full stroke. In the latter event, the pawl is disengaged through the stud 16 engaging the pawl 12, which is thereafter held free of the rack by the catch 13 until, on the upward movement of the rod, it is rendered operative again by the projection 18 engaging the tail 17 of the catch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2766723A GB217834A (en) | 1922-12-02 | 1922-12-02 | Improvements in transmitters for mine signalling apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2766723A GB217834A (en) | 1922-12-02 | 1922-12-02 | Improvements in transmitters for mine signalling apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB217834A true GB217834A (en) | 1924-06-02 |
Family
ID=10263295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2766723A Expired GB217834A (en) | 1922-12-02 | 1922-12-02 | Improvements in transmitters for mine signalling apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB217834A (en) |
-
1922
- 1922-12-02 GB GB2766723A patent/GB217834A/en not_active Expired
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