Vehicle rear-view mirror with support arm having indexing means at both ends

Claim 1

A vehicle rear-view mirror assembly for fitting externally to a vehicle and which is selectively adjustable to extend beyond a normal rear viewing position to a position in which a driver's field of view extends beyond a side of a trailer of greater width than the vehicle which is towing the trailer, said mirror assembly comprising: (a) a base part comprising means for securing said base part to a front fender of a vehicle; (b) an elongate, rigid, mirror supporting arm; (c) means mounting said supporting arm, at one end thereof, on and extending radially of said base part for turning about a substantially vertical axis relative to the base part; (d) interengaging surface portions on said supporting arm and base part; (e) complementary indexing means on said interengaging portions respectively and defining a plurality of indexing positions extending around said axis and of which two indexing positions are disposed approximately at right angles to each other; (f) means resiliently urging said interengaging portions together so that the supporting arm can be located around said axis in different ones of said indexing positions; (g) a mirror head mounted at the free end of said arm on an end portion thereof, (h) joint means connecting said end portion to the supporting arm proper for adjusting the mirror head about another substantially vertical axis through an angle approximately equal to the angle between said two indexing positions, (i) said joint means being provided with indexing means defining a plurality of indexing positions for locating the arm end portion in different ones of a plurality of indexing positions with respect to the arm proper, and (j) means for holding the mirror head in its adjusted position relative to the arm proper.