Abort cycle timer
US4409640A · kind A · utility
2Cited by
1References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 9, 1981 |
| Grant date | Oct 11, 1983 |
| Priority date | — |
| Expiry date | Nov 9, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H47/18
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This disclosure depicts a novel abort cycle timer circuit for use with an AC source of electrical power and for operating electrical controls for machinery. The circuit provides a substantially DC voltage and current, first and second relays with normally open and normally closed contacts and a timing abort circuit. Opening a first of two switches causes the second of the two relays to energize after a time delay. Opening both switches causes the second relay to deenergize after a predetermined time. The novel circuit has improved immunity to electrical and magnetic noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.