Self-actuating telephone timer
US4473718A · kind A · utility
Inventor
Key dates
| Filing date | May 11, 1983 |
| Grant date | Sep 25, 1984 |
| Priority date | — |
| Expiry date | May 11, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M15/30
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
According to the present invention a timing device for use with a telephone having a hand held receiver/transmitter replacable on the phone when not in use, is disclosed. The timing device includes a battery operated self zeroing liquid crystal display clock module provided with a normally closed switch. A feeler arm for activation of the clock module is provided which controls the position of the switch and biasing is provided for urging the switch and the feeler arm to close the switch and operate the clock module when no external forces are provided on the feeler arm. The feeler arm is secured within the timing device in a manner whereby a force of sufficient magnitude at the free end of the feeler arm in a direction generally opposed to the direction of the biasing device, causes the arm to open the switch, disconnecting the battery from the clock module. The feeler arm allows the timing device, to be secured to a phone in a convenient location with the free end of the feeler arm being positionable to be engaged by a component of the phone which forces the feeler arm to open the switch when the receiver/transmitter is hung on the phone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.