Abstract: An electronic oil filter apparatus in which an electrically conductive probe is mounted within an oil filter canister and is responsive to pressure build up on a bypass valve within the oil filter. The pressure build up is caused by clogging of the filter which eventually results in opening the bypass valve allowing dirty oil to flow around the filter. When the valve is actuated in response to excess pressure build up, a low voltage switching device allows current to flow to a signal means thereby indicating a need to change the filter.

Abstract: A portable blind for a hunter, photographer, naturalist, or the like, comprising one or more frame assemblies with a flexible exterior covering. Each frame assembly includes upright legs which are joined at the upper end thereof by a frame member. The frame assemblies are fabricated from lightweight materials such as aluminum or plastic tubular members or inflatable members which may be easily transported to a desired site. A flexible exterior covering is connected to the frame assemblies and preferably includes one or more viewing ports. At a selected site the frame assembly or assemblies are set up and operably positioned to form a shell with a covering and viewing port in an upper portion of the blind.

Abstract: A combination sun screen and pillow for use at the beach, by a swimming pool, or the like. The basic device comprises a pillow, a sun screen, and means mounting the sun screen on the pillow such that, during use of the device, the sun screen shades the face of a person resting his head on the pillow. The mounting means comprises a telescopically extensible rod which is pivotably mounted at one end to the pillow and at the other end to the sun screen, and means are provided on the sun screen for holding a book open and in place on the side of the sun screen adjacent to the pillow. The radio is mounted in or on the pillow, and the pillow contains a closable compartment for the retention of the personal belongings of the person using the device.

Abstract: An apparatus incorporating an electrobalance mechanism to measure the dynamic swing weight of a sporting implement.