Dual plane rear vision mirror

Claim 1

A dual plane mirror assembly including a first mirror element and a second mirror element, each of said elements including a reflective front side and a rear side, said first and second mirror elements including first and second substantially straight margins, respectively, elongated wedge block means including a substantially straight marginal edge of a length at least generally equal in length to one of said margins and extending between front and back surfaces of said wedge block means, the other of said margins being at least generally the same length as said marginal edge, said first mirror element being mounted to said wedge block means with the rear side of said first mirror element overlying and opposing said front surface and said first margin extending along and substantially coinciding with said marginal edge, said marginal edge, along said back surface, including a rabbet extending therealong of a constant depth, measured at right angles relative to said back surface, substantially equal to the thickness of said second mirror element along said second margin, said rabbet extending from one end of said marginal edge toward the other end thereof and tapering in transverse width, measured in the plane of said back surface, toward said other end of said marginal edge, the transverse width tapering of said rabbet being such that said rabbet terminates and intersects with said marginal edge at a point spaced slightly from said other end of said marginal edge, said front surface being inclined, longitudinally of said wedge block means, toward said back surface, said second mirror element being arranged with a major portion of said second margin seated in said rabbet and the rear side of said second mirror element at least substantially coplanar with said back surface and the remaining portion of said second margin closely opposing the corresponding portion of said first margin.