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Pulse Sequence Monitor

IP.com Disclosure Number: IPCOM000094036D
Original Publication Date: 1966-May-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 33K

Publishing Venue

IBM

Related People

Sims, DE: AUTHOR

Abstract

The circuit checks for normal sequences of pulses and supplies an indication when an abnormal sequence occurs.

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Pulse Sequence Monitor

The circuit checks for normal sequences of pulses and supplies an indication when an abnormal sequence occurs.

The circuit includes latch pickup relay 1 and capacitor 2. Normal pulse sequences are shown in cycles 1 and 2. During normal cycles, a clutch pulse precedes a circuit breaker 8, CB-8, pulse as indicated in the waveform. During cycles 1 and 2, the clutch pulse to input 3 charges capacitor 2 as shown by the capacitor charge line designated EC. Due to the charge on capacitor 2, the subsequently occurring CB-8 pulse at terminal 4 has little effect and relay 1 does not pick up.

An extra unwanted cycle with an abnormal pulse sequence is assumed to occur in cycle 3, due either to the clutch not latching at the end of cycle 2 or for other reasons. When this happens, no clutch pulse occurs and capacitor 2 remains uncharged. The CB-8 pulse to terminal 4 charges capacitor 2 sufficiently to pick up relay 1 which mechanically latches. Relay contacts 5 and 6, when closed, operate either a lamp 7 or control other indicators.

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