Abstract: A two-stroke engine possesses a cylinder, in the cylinder bore of which a combustion chamber is formed. The combustion chamber is bounded by a reciprocating piston, which drives a crankshaft rotatably mounted in a crankcase. A crankcase interior is fluidically connected to the combustion chamber across at least one transfer channel in at least one position of the piston. The at least one transfer channel emerges with a discharge opening in the crankcase interior and with at least one transfer window on the cylinder bore. It is proposed that all transfer channels have an average length as measured from the discharge opening to the transfer window, the average length being at least 1.5 in relation to the stroke, and that the volume of the crankcase interior including all transfer channels is at most 3.1 in relation to the piston displacement.

Abstract: A camera with a built-in electronic flash has a spring-driven high energy lever that is pivoted for initiating shutter opening and for translating a switch closing member to close a normally open shutter-flash synchronization switch. When the switch reopens, it translates the switch closing member in reverse. Then, during film winding a metering cam is rotated to pivot the high energy lever in reverse. The switch closing member is adapted to be pivoted temporarily of the way of the high energy lever to allow the high energy lever to be returned past the switch closing member to an original or home position.

Abstract: A camera assembly has a mount defining an optical axis. The mount has opposed first and second stops. A rocker pivots between the stops. An over-center mechanism biases the rocker toward the nearer stop. A lens turret has primary and secondary openings. The lens turret rotates with the rocker between a first configuration and a second configuration upon pivoting of the rocker between first and second positions. The rocker is movable in a direction parallel to the optical axis, independent of the lens turret in both configurations.

Abstract: In a lens module assembly method, a lens holder is placed in a receiver. The lens holder has a nest. A lens element is deposited in the lens holder. During the depositing, the lens element seats in the nest, if the lens element is in a forward-facing orientation. Entry of the lens element into the nest is interrupted, if the lens element is in a rearward-facing orientation.