Primary telephone line protector with failsafe

Details Primary telephone line protector with failsafe Primary telephone line protector with failsafe

2005-12-27

2005-12-27

Nguyen, Duc (Department: 2643)

Telephonic communications

Subscriber line or transmission line interface

Protective circuit

C361S111000, C361S119000, C361S124000, C361S125000

Reexamination Certificate

active

06980647

ABSTRACT:
Disclosed is a module (10) having pins (16-24) connected to respective conductor tower strips (46, 48, 50, 52). Pairs (46, 50and48, 52) of the conductor tower strips are spring biased toward each other to capture therebetween respective PTC current limiting elements (64, 70). A spring member60is connected to a ground pin (24) at one end, and to an overvoltage sensitive assembly at the other end, via a soldered heat transfer member (92). The overvoltage sensitive assembly includes overvoltage semiconductor devices (76, 77, 79) soldered thereto. When an overvoltage condition is sensed, the heat generated by the devices melts the solder between the heat transfer member (92) and the spring member (60), whereby lateral arms (90) of the spring member (60) move and engage the conductor tower strips (50, 52). The tip and ring pins (16, 18) of the module (10) are not only shorted together, but are shorted to ground.

REFERENCES:
patent: 3886408 (1975-05-01), Klayum et al.
patent: 3889221 (1975-06-01), Heisinger
patent: 4796150 (1989-01-01), Dickey et al.
patent: 4876621 (1989-10-01), Rust et al.
patent: 4901188 (1990-02-01), Gilberts
patent: 4905119 (1990-02-01), Webb
patent: 4907120 (1990-03-01), Kaczmarek et al.
patent: 4944003 (1990-07-01), Meyerhoefer et al.
patent: 4958253 (1990-09-01), Gilberts et al.
patent: 4958254 (1990-09-01), Kidd et al.
patent: 4964160 (1990-10-01), Traube et al.
patent: 5101317 (1992-03-01), Cwirzen et al.
patent: 5155649 (1992-10-01), Hung et al.
patent: 5166855 (1992-11-01), Turner
patent: 5175662 (1992-12-01), DeBalko et al.
patent: 5191605 (1993-03-01), Brower
patent: 5224012 (1993-06-01), Smith
patent: 5231367 (1993-07-01), Ikeda et al.
patent: 5276422 (1994-01-01), Ikeda et al.
patent: 5327318 (1994-07-01), Popat
patent: 5334553 (1994-08-01), Popat
patent: 5341270 (1994-08-01), Kaczmarek
patent: 5357568 (1994-10-01), Pelegris
patent: 5359657 (1994-10-01), Pelegris
patent: 5371647 (1994-12-01), Fried et al.
patent: 5398152 (1995-03-01), Borkowicz et al.
patent: 5422779 (1995-06-01), Borkowicz et al.
patent: 5438619 (1995-08-01), Shannon et al.
patent: 5488535 (1996-01-01), Masghati
patent: 5523916 (1996-06-01), Kaczmarek
patent: 5643014 (1997-07-01), Filus et al.
patent: 6034862 (2000-03-01), Pelosi

Affiliated with

Also associated with

Rating

Primary telephone line protector with failsafe does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Primary telephone line protector with failsafe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Primary telephone line protector with failsafe will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3514691