发明公开
EP0128500A3 Telephone with cradle having no moving parts 失效
带有无移动部件的电话的电话

  • 专利标题: Telephone with cradle having no moving parts
  • 专利标题(中): 带有无移动部件的电话的电话
  • 申请号: EP84106373
    申请日: 1984-06-05
  • 公开(公告)号: EP0128500A3
    公开(公告)日: 1986-08-20
  • 发明人: Jackson, Joseph M.
  • 申请人: Telelogic, Inc.
  • 专利权人: Telelogic, Inc.
  • 当前专利权人: Telelogic, Inc.
  • 优先权: US504324 19830614
  • 主分类号: H04M01/10
  • IPC分类号: H04M01/10
Telephone with cradle having no moving parts
摘要:
A telephone having a handset and a cradle therefor. The cradle has no external moving parts. A magnet and a magnetic reed switch are used for sensing on-hook and off-hook conditions. In a first embodiment the magnetic reed switch is provided inside the cradle, in a position which is proximate the earpiece end of the handset when the handset is resting on the cradle; the earpiece houses the magnetic for operating the switch. The earpiece of the handset houses a receiver member which includes a loudspeaker having a voice coil wound on a permanent magnet. If that magnet does not generate a magnetic field strong enough to be sensed by and to actuate (i.e., close) the reed switch when the handset is on the cradle, an additional magnet may be used to supplement the magnetic field strength. In a second embodiment, the positions of the magnet and the switch are reversed - i.e., the magnet is placed in the cradle and the magnetic switch is in the handset. As an alternative to magnetic field sensing, optical sensing may be employed, with LED's in the cradle and an optical detector in the handset, or vice-versa.
信息查询
0/0