Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1951-11-15
1982-06-29
Birmiel, Howard A.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
34082557, H03B 913
Patent
active
043374360
ABSTRACT:
1. A blanking wave generator comprising the combination of first and second sources of pulses operating in synchronism, said second pulse source having a lower pulse repetition frequency than said first pulse source, a first electron discharge device having a control electrode connected to said first pulse source, a second electron discharge device having a control electrode connected to said second pulse source, means for rendering said first discharge device conductive only upon receipt of a pulse from said first source of pulses, means for rendering said second discharge device conductive only upon receipt of a pulse from said second pulse source, a capacitor operatively connected to said first and second discharge devices, means including a source of potential and resistive means serially connected across said capacitor for charging said capacitor, said capacitor and resistive means having a time constant greater than zero but less than the repetition period of pulses from said first pulse source; means including said first discharge device for discharging said capacitor to a first voltage upon receipt of a pulse from said first pulse source, means including said second discharge device for discharging said capacitor to a second voltage when pulses are simultaneously received from both said pulse sources, a third electron discharge device having an anode, a cathode, and a control electrode connected to said capacitor; an anode-cathode circuit for said third electron discharge device; means for maintaining said third discharge device conductive when said capacitor is charged and non-conductive when said capacitor is discharged, said last named means including fixed bias on said cathode; and means responsive to interruption of current flow in said anode-cathode circuit of said third electron discharge device to develop an output pulse.
REFERENCES:
patent: 2274829 (1942-03-01), Goddard
patent: 2404306 (1946-07-01), Luck
patent: 2449169 (1948-09-01), Kirkwood et al.
patent: 2469227 (1949-05-01), Fraser
patent: 2479947 (1949-08-01), Lord
patent: 2566056 (1951-08-01), Delvaux
patent: 2597013 (1952-05-01), Marchetti
McArdle Beryl L.
Tapernoux Pierre J.
Birmiel Howard A.
General Dynamics Corporation Electronics Division
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