Page 1 - Combined_2_OCR
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                                                                               Reflector
                                                                                                Reflected
                                                                                                beam
                                                                                                 Interference
                                                                                                 filter
                                                                                                  Photodiode
                                                                                                   mixer


                                                                 Chopper                       f
                                        Transmitter                Beam                             Receiver
                                                                  Splitter
                                                                          Reference  | Optical
                                                                            beam    ’variable
                                 Fi = 24.5 MHz                                      attenuator
                                 F2 = 2.45 MHz                    Local
                                 F3 = 245 kHz                    Oscillator           Local
                                                                 Control            Oscillator
                                                                  Circuit




                                         Frequency
                                         Generator                                   Phase
                                                                                     Memory
                                                                                     Circuit
                                                                                    (Reflector)

                                                   Readout         Phase
                                                    Circuit        Meter
                                                                                                  Switch
                                                                                               o
                                                                                                 synchronous
                                                                                                    with
                                                                                      Phase       chopper
                                                                                     Memory
                                                                                     Circuit
                                                                                    (Reflector)



                                                                  Cat Whiskers
                                                                  Trigger Fluidic Valves
                                                                  Heart of these fluidic position sensors is a nor­
                                                                  mally closed poppet valve that opens when con­
                                                                  tact is made from any direction with a 4-in. long
                                                                  flexible stainless-steel whisker. Two whisker valves
                                                                  can be mounted on either side of continuously
                                                                  fed stock to detect buckling or a malfunction
                                                                  and trigger a shut-down fluidic control signal.
                                                                  Valve is made by Corning Glass Works, Corning,
                                                                  N. Y. 14830.                           Circle 562




                 Snap-On Spacer
                 Insulates Meter From Panel
                 Snapped on the face of window-mounting panel
                 meters, these clear acrylic spacers shim the meter
                 away from the panel in 5/16-in. increments. Each
                 spacer provides 25 kv insulation, and since they
                 nest with each other, any number may be used
                 to gain the necessary isolation between meter
                 and panel. Spacers are made by Modutec Inc.,
                 18 Marshall St., Norwalk, Conn. 06854. Circle 561
                 February 4, 1971
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