Abstract: A compact electric device for coding and selecting characters, symbols and/or multiple choices, includes a matrix carrying a plurality of contact or proximity sensors (1,2,3,4,5,5,7,8), an activation member (10) of sensors and a single selection key (22). This key is operated by the user for bringing in turn the activation member at least partially in coincidence with at least a first and a second of the sensors, for transmitting a selectively different coded signal for each respective different sensor. The matrix comprises a first group of sensors (1,2,3), having function of selection of respective matrix fields, and a second group of sensors (4,5,6,7,8), having function of selection of characters associated to each matrix field. The sensors are distributed on the matrix according to modular zones, having a central zone (0) and radial sector zones (A, B, C, D).

Abstract: A compact electric device for coding and selecting characters, symbols and/or multiple choices, includes a matrix carrying a plurality of contact or proximity sensors (1,2,3,4,5,5,7,8), an activation member (10) of sensors and a single selection key (22). This key is operated by the user for bringing in turn the activation member at least partially in coincidence with at least a first and a second of the sensors, for transmitting a selectively different coded signal for each respective different sensor. The matrix comprises a first group of sensors (1,2,3), having function of selection of respective matrix fields, and a second group of sensors (4,5,6,7,8), having function of selection of characters associated to each matrix field. The sensors are distributed on the matrix according to modular zones, having a central zone (0) and radial sector zones (A, B, C,D).

Abstract: An oil pump for two-stroke internal combustion engines fed from separate fuel and oil tanks, apt to form an oil flow varying according to the number of engine revolutions and according to the opening of the carburettor throttle valve.The pump comprises a rotary oil distributor with three axial pumping cylinders, the strokes of the cylinder pistons being adjusted by a cam oscillating in response to the opening of the carburettor throttle valve.