Annunciator control circuit
US5877678A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 24, 1997 |
| Grant date | Mar 2, 1999 |
| Priority date | — |
| Expiry date | Jul 24, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R16/0232
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An annunciator control circuit adaptable for responding to a plurality of types of fault indicative inputs is provided. The control circuit includes a signal conditioning circuit portion having an input line and an output line. The signal conditioning circuit also includes switch means adjustable for selectively configuring the signal conditioning circuit portion to receive each of the plurality of types of fault indicative inputs at the input line thereof and to provide a conditioned fault indicative output signal in response thereto at the output line. The control circuit further includes a first latching circuit portion connected to the output line of the signal conditioning circuit portion and having a first output line. A first switching transistor of the control circuit includes a base, collector, and emitter, the base connected to the first output line of the first latching circuit portion. In response to receipt of the conditioned fault indicative output signal from the signal conditioning circuit portion, an output at the first output line of the first latching circuit portion latches the first switching transistor in an ON state. When the first switching transistor is con…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.