Abstract: The communications monitor and logger preferably uses reel-to-reel tape recorders to continuously record communications over multiple channels such as multiple telephone lines. Each tape recorder uses a pair of capstans and pinch rollers to move the tape during recording and play-back. The pinch rollers are engaged with the capstans by means of a solenoid through a linkage and spring coupling. The spring is stretched by the solenoid only after the pinch roller makes contact with the capstan, thus reducing the force required from the solenoid. The spring is pre-loaded so as to improve the accuracy with which the force applied to the pinch roller is determined. The solenoid is used to apply force to the spring only when the solenoid plunger approaches its seat, so as to make the most efficient use of the solenoid and minimize its size and electrical power usage.

Abstract: Disclosed is a method and apparatus for the lowcost assembly of precision optical devices utilizing single or multiple bounces. The apparatus makes use of a precision machined alignment platform to support optical mirrors in precise alignment. A low cost holding structure is clamped over the alignment platform to position one of a plurality of connected sections adjacent to the back of each mirror. An adhesive is injected through holes provided in the holding structure adjacent to the back of each mirror. The adhesive bridges each mirror to the holding structure in a position corresponding exactly to the position of the mirrors on the alignment platform, thereby eliminating any need to adjust the mirrors for correct alignment.