Abstract: A resilient doorstop may be inexpensively manufactured to provide a door-engaging portion and a base portion interconnected with two or more serially connect, long, straight lengths of rod layer transverse to the door-engaging portion and having a length sufficient that the door-engaging portion may be substantially deformed in the direction of the base portion without exceeding the elastic limit of the rod. The resilient doorstep is preferably formed from a single, resilient, bent rod and includes a U-shaped portion with a central axis laying transverse to the central axis of the door-engaging portion to provide one or more long straight lenghts of rod, permitting deformation of the door-engaging portion toward the base portion through torsional deformation and urging the door-engaging portion away from the base portion through torsional resilience.

Abstract: A system for allocating energy adapted to be coupled to a plurality of conditioning equipment systems utilized to alter a plurality of corresponding first conditions. Thermal sensors for monitoring the conditions in each of a plurality of environments are coupled to allocation circuitry which provides for activation of control channels of the allocation circuitry in an order determined by the relative demand for conditioning of the plurality of environments. When two or more environments are determined to have the same demand for conditioning, the control channels of the allocation circuitry are activated in a controlled order. When a predetermined number of control channels have been activated, the process of allocation is terminated by the allocation circuitry. When more than the predetermined number of control channels is activated in case of a failure of the system, an alarm is activated and all previously activated control channels are deactivated.