Silent alarm clock
US5764594A · kind A · utility
Inventors
Key dates
| Filing date | May 23, 1996 |
| Grant date | Jun 9, 1998 |
| Priority date | — |
| Expiry date | May 23, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04G13/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A silent alarm clock including a portable receiver unit with a wrist watch-type configuration. The receiver unit includes a vibrator adapted to create a vibrating sensation upon the receipt of a radio signal. To provide power to the receiver unit a rechargeable battery is included with a pair of associated contacts and a charger adapted to allow the recharging thereof. Also included is a base transmitter unit with a recharging base having a pair of contacts for contacting those of the receiver unit in a recharge orientation. A clock unit is situated within the base transmitter unit having associated control circuitry and a speaker. The clock circuitry is adapted to define at least two predetermined times. The base transmitter unit is adapted to transmit an audio signal via the speaker at a predetermined time if the receiver unit is the recharge orientation thereof and further generate a radio signal via free space if the receiver unit is not in the recharge orientation. Thus, a first user is awakened via the vibrator at the first predetermined time and places the receiver unit within the recharging base thereafter. A second user is then awakened at the second predetermined time via…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.