Volume control mechanism for a bell assembly
US4337461A · kind A · utility
0Cited by
2References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 7, 1980 |
| Grant date | Jun 29, 1982 |
| Priority date | — |
| Expiry date | Jul 7, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K1/0645
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An indexing mechanism for the volume control of a telephone bell comprises a slot and associated indexing notches which co-operate with a guide pin and an indexing pin respectively. Volume control is effected by forcing the indexing pin over one or more notches as desired. The volume setting is not easily altered by vibration of the instrument.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.