Abstract: The illustrated embodiment of my invention is a wrist watch having a watch case and a fixed seat outside of it. The watch case is movably mounted relative to the seat and is recessed within that seat. A spring normally holds the case in a rest position recessed within the seat. The case contains a quartz crystal, a circuit board, and an electro-optical data display at a window in the case. Manual actuation of a press-on member, specifically here a push button, against the resisting spring causes the case to move and thereby close a switch that causes the current time reading to appear on the display. Other displays occur successively if the case is soon enough manually moved part of the way back to its rest position and allowed to pop back up from there.

Abstract: Rotary engine has four pistons circling in a toroidal chamber formed inside a casing, successive pairs of cylinders accelerating and decelerating relative to each other. The pistons are carried on piston carriers that are generally figures of revolution. Portions of these piston carriers are joined by bevel gears through which both rotation and accompanying oscillation are enforced upon the piston carriers.

Abstract: This rotary engine has two rotary piston carriers, with each of them carrying two pistons which circle a toroidal chamber. Crankshafts contacting those piston carriers offcenter program them in oppositely phased acceleration and deceleration, with two cycles of this superimposed upon one 360.degree. turn of the piston carriers.Pinion gears are solidly secured to the crankshafts and run in (and mesh with) a fixed ring gear of twice the pinion diameter. That diameter relation precludes running the ordinary shaft through the toroid's central axis. As disclosed here a drum-like assembly is put together which can rotate in that space. Diametrically opposite the offcenter crankshaft is a tie rod. Both it and the crankshaft are secured to the piston carriers snugly against any looseness, and this drum-like assembly rotates continuously at and around the central axis.