Striking Features In A New Sliding Door

Light in Weight and Simple in Operation, the Dorvac System Appears to Provide for All Contingencies K NOWN as the Dorvac system, a new eiectro-vacuum or air-pressure......

An Ingenious

" Easy-change" Device New Warren Mechanism Incorporating a Free Wheel and Synchronizing Dogs. Full Clutch Withdrawal Isolates Gearbox -flESICNED for mounting behind the gearbox,......