Anti-vandalism arrangement for protecting the touch calling unit of a coin telephone
US4160136A · kind A · utility
45Cited by
3References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 25, 1978 |
| Grant date | Jul 3, 1979 |
| Priority date | — |
| Expiry date | May 25, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2239/038
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An arrangement for protecting the touch calling unit and associated pushbuttons of a coin telephone, wherein the arrangement consists of metal pushbuttons interchangeable with the touch calling units standard pushbuttons and a decorative shield plate. The pushbuttons include a rectangular operating member of a reduced size, extending from an upper section of each pushbutton. The shield plate include protective collars, adapted to encompass the pushbutton operating member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.