Abstract: A cutter housing for use in a power-driven lawn mower has a substantially cylindrical skirt wall and a top wall covering the upper end of the skirt wall. The top wall has a substantially central recess for accomodating the engine of the lawn mower and includes a pair of half members positioned one on each side of the recess and lying substantially flush with each other in symmetrical and contiguous relation. The cutter housing also has a rear housing portion extending rearwardly in contiguous relation to the skirt wall and the top wall, and a partition disposed in the rear housing portion and dividing the rear housing portion into two spaces. The skirt wall, the top wall, the rear housing portion, and the partition are integrally molded of synthetic resin.

Abstract: A linear image sensor of a self-scanning type comprising a phototransistor array and a scanning circuit, whose circuit comprises decoders of current switches connected dendritically, input signal converter circuits generating input signals for driving the current switches, and a current switch array which turns on or off charging currents to the phototransistors according to whether or not an output current of decoder exists, so that video signals from the phototransistors, when the output currents of decoder flow, are obtainable from the phototransistors in the charge storage mode, all the transistors for scanning circuit being operated in nonsaturation condition for high-speed operation and the input signals being encoded so that the input signals to the decoder vary by one bit at each scanning step for noise reduction. The cancellation circuit of dark signal and noise signal is also provided.