Abstract: An electrical cabinet stores, or houses, a variety electrical components. The electrical components within the cabinet may be interconnected and may be connected to other electrical components external to the cabinet. The cabinet has an access door with a door stop that allows the door to be locked in an open position. The cabinet contains a workstation with a pivoting platform that supports an electrical component. The cabinet has an extendable bracket that extends allows an electrical component to be extended from the cabinet and removed by lifting the component in an upward direction. The cabinet has a board guide module that aligns a circuit board with an electrical connector in the cabinet. The cabinet has a bulkhead connector that reduces electromagnetic degradation in electrical cables that extend from the cabinet.

Abstract: Diaminoalkyl quaternary ammonium salts are prepared by the reaction of alkyl halides with tertiary diamines having C.sub.2-20 primary alkyl radicals attached to nitrogen and an alkyl radical between the two nitrogen atoms in which at least three carbon atoms separate said nitrogen atoms. Said salts are preferably substantially free from corresponding diamines. They are useful as catalysts for interfacial polycarbonate preparation by the reaction of phosgene with at least one dihydroxyaromatic compound. Polycarbonate preparation using such catalysts is economical in phosgene consumption, is accompanied by a rapid conversion of chloroformate groups to desirable species and affords a product with a very low proportion of unreacted dihydroxyaromatic compound.

Abstract: The invention relates to the cementing of high temperature wells. A cement retarder comprises a phosphonic acid derivative combined with borax in a weight ratio of phosphonic acid derivative to borax of about 0.025 to about 0.2. A long pumping time is realized with rapid compressive strength development following placement.

Abstract: An inserter/ejector system for use in inserting a circuit board into a backplane in a chassis and for ejecting the circuit board from the backplane in the chassis. The inserter/ejector system may be used in conjunction with staggered height connector pins to permit the circuit board to be inserted into or removed from the backplane without removing power to the backplane.