10 the nozzle 14 is removed by releasing the clamp 73 raising the headlamp portion 15 and pivotable duct 66 to the phantom positions seen in fig1 releasing the latch 57 and sliding the nozzle in the releasing direction until the resilient fingers 38 have slipped out of the female member 34 and opening 37 1a 6 of the carriage 12 so that nozzle 14 is entirely free of carriage 12 insertion or mounting is accomplished in the opposite sequence latch 57 automatically snapping into place when the nozzle is fully inserted the offset position of the flanges 36 best seen in fig5 and the slightly angled configuration of the resilient fingers 38 best seen in fig6 assure that proper driving engagement will be established between these elements no matter what the initial register is between them at the time the powered brush vacuum nozzle 14 is inserted or mounted on the carriage 12 it is to be noted that when the female mounting members 51 53 and male members 61 63 are initially mutually engaged in their dovetailing engagement the male and female members 40 and 34 of the releasable drive connection are thereby contained in alignment for proper engagement if the.