Telephone transmitter cut-off

作者: D Pardee

DOI:

关键词:

摘要: An apparatus for muting or cutting off a telephone transmitter is disclosed that relatively inexpensive, reliable, comprises minimum number of components and may be affixed to handset with effort without modifying conventional handset. The switch so located as enable operation by the fingers hand holding telephone. aforementioned Abstract neither intended define invention application which, course, measured claims, nor it limiting scope in any way.

参考文章(1)
Fayette H Bachman, Short-circuit switch ,(1924)