发明名称 |
Lighted display for a console |
摘要 |
A lighted display for a console, particularly for a telephone console for private branch exchanges, comprises a sandwich structure of a front transparent cover of a dark coloured material, an indicator layer or sheet of dark non-transparent material having transparent characters thereon and a plurality of lamps mounted in holders behind the indicator sheet, a lamp aligned with each character. When assembled an apparently completely dark blank display is presented, but on lighting of a lamp a clear distinct indication appears. Indication characters can be in vertical columns, and there is no need to stagger characters as occurs with conventional displays with "edge-lit" characters.
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申请公布号 |
US3949504(A) |
申请公布日期 |
1976.04.13 |
申请号 |
US19740513230 |
申请日期 |
1974.10.09 |
申请人 |
NORTHERN ELECTRIC COMPANY, LIMITED |
发明人 |
WILLIS, WESLEY NELSON;LAING, GRAHAM STIRLING |
分类号 |
G09F13/04;G09F13/08;(IPC1-7):G09F13/04 |
主分类号 |
G09F13/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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