GB191500110A - Improvements in or relating to Observation Instruments. - Google Patents
Improvements in or relating to Observation Instruments.Info
- Publication number
- GB191500110A GB191500110A GB191500110DA GB191500110A GB 191500110 A GB191500110 A GB 191500110A GB 191500110D A GB191500110D A GB 191500110DA GB 191500110 A GB191500110 A GB 191500110A
- Authority
- GB
- United Kingdom
- Prior art keywords
- hinged
- tube
- hinged together
- sections
- hooks
- 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
- Hinges (AREA)
- Mirrors, Picture Frames, Photograph Stands, And Related Fastening Devices (AREA)
Abstract
110. Youlten, W. Jan. 4. Periscopes.-A collapsible periscopa is formed of hinged parts which are adapted to form a complete tube when opened out and are provided with hinged or like mirrors adapted to come opposite suitable apertures when the device is opened out for use. In the construction shown in Fig. 1, two tube sections are formed respectively of flaps, plates, or frames a, b, c, d and a<1>, b<1>, c<1>, d' hinged together along their edges by textile, metal, or like hinges, the two sections being also hinged together. The mirrors are carried by hinged flaps f adapted to be held in the operative position by hooks k engaging suitable catches. In order to collapse the instrument, the hooks k and a similar hook n ara disengaged, and the device is flattened out and then folded about the hinge e, so as to assume the collapsed position shown in Figs. 3 and 4. In modifications, two or more rigid tube sections are hinged together so as to fold side by side. The Provisional Specification describes a tube which has a lazy-tong framework and collapses on the accordion principle, and, further, a dummy mirror to draw the enemy's fire.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB191500110T | 1915-01-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB191500110A true GB191500110A (en) | 1915-12-09 |
Family
ID=32375007
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB191500110D Expired GB191500110A (en) | 1915-01-04 | 1915-01-04 | Improvements in or relating to Observation Instruments. |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB191500110A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3936668A (en) * | 1974-05-03 | 1976-02-03 | Frederick Siebel | Apparatus for viewing the underside of vehicles |
US4981346A (en) * | 1988-11-17 | 1991-01-01 | Mccalla-Lackey Associates, Inc. | Collapsible portable periscope |
-
1915
- 1915-01-04 GB GB191500110D patent/GB191500110A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3936668A (en) * | 1974-05-03 | 1976-02-03 | Frederick Siebel | Apparatus for viewing the underside of vehicles |
US4981346A (en) * | 1988-11-17 | 1991-01-01 | Mccalla-Lackey Associates, Inc. | Collapsible portable periscope |
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