Off-hook telephone clearing system
AssigneeSouth Tech Instruments, Inc.
InventorsTyler E. Waite, Jeffrey M. Byrd
Life of this patent
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Abstract
An off-hook telephone clearing system for a telephone line having at least two telephones connected thereto, comprising a howler tone detector connected to each telephone, and a telephone disconnect device having an input responsive to the howler tone detector for disconnecting a telephone being in off-hook condition from the telephone line. The clearing system may include a latching relay in the disconnect device. The latching relay may be mechanically coupled to the telephone hookswitch for delatching upon hang-up of the receiver.
Claims14
An off-hook telephone clearing system for a telephone line having at least two telephones connected thereto comprising a howler tone detector connected to each telephone, a telephone disconnect device having an input responsive to the howler tone detector for disconnecting a telephone being in permanent off-hook condition from the telephone line;
- wherein said disconnect device includes at least one break contact in series with a respective conductor of said telephone line;
- and
- wherein the disconnect device further includes an input connected to said howler tone detector for activating said break contacts, said howler tone detector including a storage device for storing energy derived from the howler tone for energizing activation of said break contact.
Dependencies are inferred from the claim text.