Abstract: A circuit breaker mechanical interlock apparatus is provided for preventing an electrical system from being energized by more than one of a plurality of power sources at any given time. The apparatus includes a housing that defines a receptacle for receiving two or more circuit breakers having actuating switches for energizing the electrical system. The apparatus further includes one or more interlock slides movably mounted on the housing and a faceplate for restricting unauthorized access to the slides. The number of interlock slides is one fewer than the number of circuit breakers so that the slides can be positioned to provide access to only one of the switches of the circuit breakers, while the remaining switches of the circuit breakers cannot be accessed. Each of the switches of the circuit breakers can be individually accessed without the slides extending beyond the periphery of the housing.

Abstract: A new device is provided for controlling and maintaining the ambient air temperature within a remote telecommunications battery enclosure. A thermoelectric device located in intimate contact with heat exchangers and fans configured such that at least one heat exchanger is positioned within or spaced in thermal communication with the interior of the battery enclosure, and at least one heat exchanger is positioned outside of or spaced in thermal communication with a thermal dissipation arrangement exterior to the battery enclosure. The system further has a sensor or microprocessor connected to the thermoelectric device and configured to control the system to heat or cool the battery enclosure by responsively reversing polarity of the thermoelectric device as indicated by ambient air temperature or battery temperature to maintain the air temperature within predetermined limitations. A hydrogen vent is provided to maintain sub lower explosive levels of hydrogen gas within the battery enclosure.

Abstract: A new device is provided for controlling and maintaining the ambient air temperature within a remote telecommunications battery enclosure. A thermoelectric device located in intimate contact with heat exchangers and fans configured such that at least one heat exchanger is positioned within or spaced in thermal communication with the interior of the battery enclosure, and at least one heat exchanger is positioned outside of or spaced in thermal communication with a thermal dissipation arrangement exterior to the battery enclosure. The system further has a sensor or microprocessor connected to the thermoelectric device and configured to control the system to heat or cool the battery enclosure by responsively reversing polarity of the thermoelectric device as indicated by ambient air temperature or battery temperature to maintain the air temperature within predetermined limitations. A hydrogen vent is provided to maintain sub lower explosive levels of hydrogen gas within the battery enclosure.

Abstract: An enclosure (10) is provided for storing a battery (12) or other device that emits hydrogen or other potentially explosive, lighter-than-air gas during operation. The enclosure includes a floor (14), ceiling (16) and side walls (18) defining a substantially air-tight interior space, and a ventilation system for venting the low density gas from the space. The ventilation system includes a first passageway (20) extending through the side wall (18) into an upper end of the space and including an inlet (24) disposed in the interior space at the upper end and an outlet (26) disposed outside the space. Also, the system includes a second passageway (22, 42) that extends into a lower end of the space, terminating at an outlet disposed within the enclosure adjacent the upper end of the interior space.