Auctioneering circuit

Details Auctioneering circuit Auctioneering circuit

1986-07-31

1987-11-03

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307351, 307356, 307357, 328117, H03K 524

Patent

active

047045469

ABSTRACT:
An auctioneering circuit is provided which utilizes voltage signals that are representative of current signals passing through secondary windings of current transformers. A voltage signal is provided which is representative of the current passing through two or more current transformers. This voltage signal is passed alternatively through a resistive path or an inverting amplifier. Negative portions of the voltage signal are passed through an inverting amplifier to provide a positive signal to the non-inverting input of an operational amplifier. This non-inverting input of the operational amplifier is also connected through a resistive path to the source of the originating volt signal. The input signals to the operational amplifier represent a full wave rectified signal. Three such circuits are connected together at a common connection point and the common connection point is connected to ground through a load resistor across which the maximum of two or more voltage signals can be measured. The circuit operates as an auctioneering circuit using voltage signals.

REFERENCES:
patent: 3252008 (1966-05-01), Vandaveer, Jr.
patent: 3590326 (1971-06-01), Watson
patent: 3596107 (1971-07-01), Kittrell
patent: 3634729 (1972-01-01), Hendry et al.
patent: 3634730 (1972-01-01), Wislon
patent: 3660722 (1972-05-01), Wilson et al.
patent: 3689801 (1972-09-01), Engel et al.
patent: 3758867 (1973-09-01), Schulz
patent: 4626707 (1986-12-01), Arita et al.

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