Unitized housing for silent and tone pager alerting system
US4931765A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 9, 1989 |
| Grant date | Jun 5, 1990 |
| Priority date | — |
| Expiry date | Feb 9, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B6/00
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A housing for an alerting system within a selective call radio receiver exhibits substantial space saving characteristics by incorporating both a low profile vibrator motor for silent alerting and a tone generator for audio alerting. The housing comprises a rigid material defining first and second chambers adjacent and separated by a common wall of the housing, the first chamber containing the low profile vibrating motor, the second chamber containing the tone generator, the housing defining a first port therein for omitting an audio tone from the second chamber and at least one other port therein for providing power to the low profile vibrating motor and the tone generator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.