Patent
1989-05-25
1990-10-23
Arnold, Bruce Y.
350540, 350543, 350544, G02B 718, G02B 2308
Patent
active
049647121
ABSTRACT:
A device for enabling the driver of a vehicle to view behind the vehicle as he is driving. The apparatus includes a number of elongated periscopes mounted generally vertical within the vehicle. The periscopes are mounted so as to provide adjacent angular fields about a generally vertically-oriented axis. The device further includes a plurality of sleeves, each sleeve receiving a corresponding periscope for axial movement for relative thereto. The sleeves are mounted for movement about a generally horizontal axis. Each sleeve includes a pawl member which projects axially from its corresponding sleeve. The apparatus is, further, constructed so that when a main body portion of a periscope is moved telescopically within its corresponding sleeve to bring that sleeve into engagement with a collar carried by a head portion of the periscope, the pawl member will enter one of a plurality of circumferentially-spaced notches formed in the collar to enable rotation of the main body portion of the periscope tube about the axis of elongation thereof.
REFERENCES:
patent: 1635011 (1927-07-01), Sadler
patent: 1710040 (1929-04-01), Boysen
patent: 3972596 (1976-08-01), Baumgardner et al.
patent: 4120566 (1978-10-01), Sancj et al.
patent: 4787725 (1988-11-01), Preussner et al.
patent: 4826304 (1989-05-01), Guch, Jr. et al.
Arnold Bruce Y.
Nawrocki Larence M.
Shafer R. D.
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