| 摘要 |
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.
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