Blade set-removing devices for hair clippers in particular for hair clippers to be combined with electrical shaving apparatus

Claim 1

AN ELECTRIC HAIR CLIPPER ATTACHMENT FOR USE WITH A ROTARY DRY SHAVER PROVIDED WITH A DRIVE SHAFT COMPRISING A HOUSING HAVING A SLOT AT ONE END, MEANS IN SAID HOUSING CONNECTED TO SAID DRIVE SHAFT FOR CONVERTING SAID ROTARY MOTION TO RECIPROCATING MOTION, A SET OF RELATIVELY RECIPROCATING BLADES PROJECTING THROUGH SAID SLOT WITH CLEARANCE AND OPERATIVELY CONNECTED TO SAID MEANS, THE HOUSING AND BLADE SET BEING PROVIDED WITH CORRESPONDING STUDS AND RECESSES, A SPRING IN SAID HOUSING NORMALLY URGING SAID CORRESPONDING STUDS AND RECESSES INTO ENGAGEMENT WITH EACH OTHER WITH A DEPTH OF ENGAGEMENT SUBSTANTIALLY PERPENDICULAR TO THE PLANE OF SAID BLADE SET, SAID BLADE SET BEING ADAPTED TO BE DISPLACED TRANSVERSELY TO THE LONGITUDINAL AXIS OF SAID HOUSING AGAINST THE PRESSURE OF SAID SPRING TO DISENGAGE SAID STUDS AND CORRESPONDING RECESSES AND PERMIT THE BLADE SET TO BE REMOVED FORWARDLY THROUGH SAID SLOT.