Abstract: A container lid including: a lid body which includes a flared perimeter wall, an inner structure, and a perimeter well. The inner structure defines a central throat. The perimeter well defines a plurality of openings disposed around the central throat. A lid body seal is disposed about the lid body. A lid upper includes: a lid base and a lid roof secured to the lid base. The lid base is lockably received in the central throat. The lid roof at least partially covers the perimeter well when the lid base is lockably secured in the central throat.

Abstract: A panel marking device for marking angular cut lines on panels includes a plate, which has a straight end. An L-bracket is engaged to and extends along the straight end. Cutouts in the L-bracket distal define teeth, which engage an edge of a panel so that the plate is prevented from sliding along the edge. A dial comprising a pointer is rotationally engaged to an upper face of the plate. A fastener is engaged to the dial and is opposingly positioned on a circumference of the dial relative to the pointer. Indicia are positioned on the plate, with each indicium corresponding to a respective angle of an imaginary line, which extend from a string line engaged to the fastener through the pointer, relative to the edge of the panel. The string line can be snapped to place a linear mark on the panel that matches the respective angle.

Abstract: A clock pulse circuit is disclosed in which two clock pulse generators operate in an active-standby circuit arrangement to provide a highly reliable single clock output signal comprising a sequence of repetitive pulses. The arrangement comprises a plurality of counters to count pulses generated by each of the clock pulse generators. Comparison circuitry connected to the counters generates an inequality signal indicative of an apparent failure of one of the generators. Logic circuitry responsive to the inequality signal will cause subsequent clock output pulses to be derived from the operating pulse generator. In one embodiment of this invention an actual failure is distinguished from an allowable phase drift of the generator output signal. Another embodiment utilizes additional counters responsive to complementary generator output signals to maintain an uninterrupted sequence of clock output pulses regardless of a failure in either pulse generator.