Abstract: A surge protection device has a modular construction so that a manufacturer can assemble the parts in any combination desired by a customer. This eliminates any need to maintain large varieties of surge protection modules in inventory. The modular construction includes a housing having a plurality of bores formed therein into which is press fit long pins and short pins for electrical communication with an external power source and an internal customer telephone circuit, respectively. The housing further includes a pair of recesses into each of which may be press fit a positive temperature coefficient resistor. A first embodiment of spring clips helps hold the positive coefficient resistors in place and provides needed electrical contacts, and a second embodiment of spring clips further includes an elongate part that extends to a test point opening formed in a cover for the modular device.

Abstract: An electronic air compressor control system and method including an actuator connected to an air compressor for regulating the loading and unloading of the air compressor based on predetermined conditions, a power supply electrically connected to the actuator for supplying a voltage thereto and a plurality of switches electrically coupled to the actuator and power supply for controlling the supply of voltage from the power supply to the actuator in order to control the operation of the air compressor based on a predetermined air compressor exhaust temperature threshold and minimum and maximum pressure thresholds. The unloading and loading of the air compressor is based on a predetermined air compressor exhaust temperature when the pressure within the wet tank is between the minimum pressure threshold and the maximum pressure threshold.