Abstract: An electromagnetic-induction-type position determination apparatus or digitizer for inputting or digitizing hand-written characters and graphic equipment to electronic equipment is arranged so as to have a reduced number of conductors installed on its interface plate and has a reduced number of complicated control circuits. The apparatus includes an interface plate having conductors installed in the form of a matrix and a control system for supplying two currents to two conductors in the same direction. A pick-up is moveably positioned on the interface plate for picking up two induced voltages induced by magnetic fields generated by the two currents flowing through the two conductors and a detector and processor are arranged to detect a predetermined relationship between the two induced voltages and to derive digital coordinate data based on the detected predetermined relationship.

Abstract: A two stroke engine has a pair of adjacent cylinders. The exhaust passage from one cylinder passes near the other cylinder. Localized distortion of the other cylinder is reduced or prevented by placing isolation, insulation, or cooling means in the region between the exhaust passage and the other cylinder.