Very low-profile motor arrangement for radio pager silent alerting
US4864276A · kind A · utility
31Cited by
5References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 3, 1988 |
| Grant date | Sep 5, 1989 |
| Priority date | — |
| Expiry date | Jun 3, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K7/063
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A low-profile motor arrangement for accomodation in a low-volume electronic device such as a radio pager. The motor is designed to provide a vibrating action for silent alerting that does not require any additional add-on parts, but effects the required vibrator action by a designed-in unbalance in the rotating internal parts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.