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
Application number
Inventor
William Youlten
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of GB191500110A publication Critical patent/GB191500110A/en
Expired legal-status Critical Current

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.
GB191500110D 1915-01-04 1915-01-04 Improvements in or relating to Observation Instruments. Expired GB191500110A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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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