Abstract: A shaver incorporating rotary cutters included in a rotary platform. The platform and rotary cutters are both rotated by a motor and gear chains housed within the shaver.

Abstract: A device for the simultaneous removal and replacement of a plurality of sharp cutting elements in a rotary electric shaver without touching them or transposing their respective pinion positions.

Abstract: A rotary electric shaver with a plurality of cutting heads that have planetary motion and circular motion for the outer screen elements of the cutting heads and an internal gear ring drive means.

Abstract: A reciprocating linear drive means for a pop-up trimmer on a rotary electric shaver with cutting heads that are mounted on a rotating, circular head frame.

Abstract: A rotary electric shaver with a plurality of individually rotating cutting elements contained within a circular head frame that provides planetary motion to the cutting elements by rotating the head frame around the single central drive shaft of a single electric motor within the shaver body.

Abstract: A removable vacuum indicator valve, horizontally affixed to the outside of an evacuated container, such as a flat-plate solar energy collector, wherein a movable sphere inside the valve is positioned to open or close the valve by the force of gravity or atmospheric pressure. The sphere, in open position, indicates the loss of vacuum and completes an electrical circuit which automatically activates a pump for restoring the vacuum to the container. The vacuum indicator valve, in combination with a normally closed valve installed permanently inside the evacuated container, and a remote electrically activated vacuum pumping system, provides a simple, inexpensive method for permanently maintaining and monitoring the vacuum in the container.

Abstract: An efficient heat insulating food heating chamber for a solar oven. The heating chamber includes a compartment and reflecting devices for concentrating solar radiation to elevate the temperature of the heating compartment. The heating compartment is defined by a lateral outer casing, an intermediate insulation and shock absorbing medium, and an innermost evacuated or partially evacuated glass casing. The inner most casing has a substantially angular inner wall for additional reflection of solar energy and a stepped surface for supporting transparent plates and a collection plate.

Abstract: An interlocking reflector panel guide for rigidly fixing the angular relationship of foldable, extendable reflector panels with respect to a flat collector plate. The rigid reflective extension panels surround the open side of a solar oven and are fixed in their angular relationship with respect to the collector plate by double channel guide members which mate with the edges of the reflective panels. The double channel guide members have a locking portion which maintains the reflective panels in the proper position when the oven is in use, yet allows the reflective panels to be unlocked and folded or removed for storage.