Abstract: Fuel dispensers are converted to provide vaccum assisted recovery of vapors. Where previously provided with, or "plumbed" for, a pressure balance type of recovery system, the prior hose means is disconnected to permit mounting of a fuel driven, vacuum pump in communication with preexisting fuel and vapor conduit means. Where there has been no prior provision for vapor recovery, conduit means are installed to provide communication between the dispenser pedestal and a remote receiver for fuel vapors. One end of a coaxial hose, preferably of the inverted type, is mounted on the pump and the opposite end of the coaxial hose is connected to a vacuum assist nozzle.

Abstract: Disclosed are control modules for use in systems utilizing flexible, optical fiber bundles, which control modules include an optical switch and an optical receiver. Each is provided with quick-disconnect fittings for receipt of optical fiber bundles. Also disclosed is a control system for an apparatus including a machine having mechanical parts which perform a series of operations wherein the control inputs to the machine are generated by the control modules operated in response to mechanical movements of the machine.