公开(公告)号：DE3016697A1

公开(公告)日：1980-11-13

申请号：DE3016697

申请日：1980-04-30

Applicant: NORTHERN TELECOM INC

Inventor： SPLITT FRANK G ,  TURNER DONALD B

IPC: H01T1/20 ,  H01T2/02 ,  H01H83/10

Abstract: A gas filled surge arrester having improved impulse ratio, characterized by an ion source in an electric field outside of the spark gap.

公开(公告)号：SE7514222L

公开(公告)日：1976-06-17

申请号：SE7514222

申请日：1975-12-16

Applicant: NORTHERN TELECOM INC

Inventor： OSBORNE D C ,  HARRISON J M ,  HILLMAN A K

IPC: H04M3/32 ,  G01D5/12 ,  H04M3/26

Abstract: Improvements in apparatus for measuring characteristics of a communications channel, characterized in that a programmable local unit is arranged in one of two terminals between which the measurement is made, to exchange analog test signals with the communication channel; a central digital computer device for exchanging digital information signals with the programmable local unit, and a first communication link between the control device and the local unit for retransmitting said digital information signals. (Machine-translation by Google Translate, not legally binding)

公开(公告)号：CA1153139A

公开(公告)日：1983-08-30

申请号：CA359971

申请日：1980-09-09

Applicant: NORTHERN TELECOM INC

Inventor： WERNET WILLIAM F ,  MILLER STEVE

IPC: H04M1/30

Abstract: PUSHBUTTON SWITCH ASSEMBLIES FOR TELEPHONE SETS A pushbutton array, connector block and a connector, for mounting in a telephone set base, are mounted on and interconnected by a flexible printed circuit member, by connection pins on each item passing through the circuit member and wave soldered. The flexible circuit member can be bent or folded so that the various items attached can be mounted in the desired relative positions and orientation.

公开(公告)号：CA1145869A

公开(公告)日：1983-05-03

申请号：CA369691

申请日：1981-01-29

Applicant: NORTHERN TELECOM INC

Inventor： YOUNG ROBERT E ,  HUFFMAN RICHARD K

IPC: H04M15/26 ,  H04M15/00

Abstract: APPARATUS FOR USE IN A TELEPHONE EXCHANGE INCLUDING AN OPERATOR CORDBOARD POSITION Apparatus is provided for eliminating manual completion of tickets by operators at operator positions, one or more of which are operator cordboard positions, of a telephone exchange. The apparatus comprises a keyboard and display unit and an independently operable processing and storage unit provided individually for each operator position, the operator position and keyboard and display unit being connected to the processing and storage unit. Each operator position functions with its associated units independently of the other operator positions and any central processing unit. All of the processing and storage units are coupled via a concentrator to automatic message accounting equipment for forwarding call records thereto for billing. The concentrator is connected to teletypewriters and also to a storage unit for storage of call records in the event of failure of the automatic message accounting equipment.

公开(公告)号：CA1136189A

公开(公告)日：1982-11-23

申请号：CA371308

申请日：1981-02-19

Applicant: NORTHERN TELECOM INC

Inventor： HASKINS STEVE W

IPC: H01H11/00 ,  H01H19/64 ,  H01H19/46

Abstract: ENCLOSED MODULAR SWITCH A modular switch, which can be used in telecommunications systems, provides an enclosed environment and, from a particular selection of spring cantilever contact members, a normally made, a normally open and transfer function can be provided. By shaping the body of the switch a plurality of switches can be attached together.

公开(公告)号：CA1135888A

公开(公告)日：1982-11-16

申请号：CA355659

申请日：1980-07-08

Applicant: NORTHERN TELECOM INC

Inventor： ADAMS WILLIAM J ,  WERNET WILLIAM F

IPC: H01H13/702 ,  H04M1/23

Abstract: PUSHBUTTON DIAL ASSEMBLY A pushbutton dial assembly, particularly for a telephone handset, is in the form of a sandwich structure comprising a pushbutton member having a plurality of push buttons; a flexible transfer member having a plurality of actuating members, one for each push button, each actuating member having a domed portion extending away from the push button; a flexible contact member having a plurality of domed areas or bubbles, the domed areas extending towards the actuating members and in contact with the domed portions, the concave surface of each domed area having a conducting surface; a flexible insulating spacer member with apertures aligned with the domed areas; and a circuit member having a plurality of contact areas, a contact area aligned with each domed area, and a circuit pattern interconnecting the contact areas. Pressure on a pushbutton causes a domed portion to depress the related domed area which snaps through to make contact with the related contact area. The circuit member can be part of a flexible circuit member carrying electronic components. Grounding means are provided for by-passing static charges occurring on actuation of a push button by a user.

公开(公告)号：CA1134524A

公开(公告)日：1982-10-26

申请号：CA357282

申请日：1980-07-29

Applicant: NORTHERN TELECOM INC

Inventor： WERNET WILLIAM F ,  ADAMS WILLIAM J ,  HASKINS STEVE W

IPC: H01H1/28 ,  H04M1/08

Abstract: MULTIPLE CANTILEVER SPRING CONTACT HOOK SWITCH A multiple cantilever spring contact switch has a plurality of cantilever spring contacts, in one or more series, with the contacts of each series clamped between surfaces which provided a predetermined relative inclination of the contacts. A pivotal member is mounted on the switch assembly or actuation by an operating member, the pivotal member in turn actuating the contacts. The contact between operating member and pivotal member is localized so that misalignment between operating member and the switch assembly does not affect actuation ; of the contacts. Such misalignment can occur when the switch assembly or operating member or both are mounted on printed circuit boards. The switch is particularly suitable for a hook switch of a telephone.

公开(公告)号：FR2482758A1

公开(公告)日：1981-11-20

申请号：FR8109603

申请日：1981-05-14

Applicant: NORTHERN TELECOM INC

Inventor： SIMS DEWEY M JR

IPC: G11B15/675 ,  G11B25/06 ,  G11B23/04

Abstract: A cassette or cartridge-loading tape transport is disclosed, for use in magnetic recorders and the like, especially data recorders. The device includes tracks for slidably receiving a cassette or cartridge. A plate is slidably supported below the tracks and a drive motor is mounted on the plate. A constant-force spring biases the plate to a forward position. A plurality of lever arms supporting rollers are pivotally mounted adjacent the plate. Each lever arm includes a cam surface cooperating with a cam surface on the plate so that the rollers on the arms are moved from a lowered, inoperative position to a raised position engaging, locating and locking the cassette or cartridge within the recorder. A constant-force spring biases the lever arms to a raised position.

公开(公告)号：CA1106513A

公开(公告)日：1981-08-04

申请号：CA319090

申请日：1979-01-04

Applicant: NORTHERN TELECOM INC

Inventor： THROOP C TERRY ,  MOFFETT RICHARD E ,  HEMMERT JOHN R ,  SAWYER ROBERT E JR

IPC: H04M3/24 ,  H04Q1/38 ,  H04Q1/45 ,  H04M15/00

Abstract: Telephone signalling test apparatus is provided for monitoring telephone lines under live traffic conditions. The apparatus is modular with a main frame having a line interface and central control and storage unit, as well as numerical display.

公开(公告)号：NL7514443A

公开(公告)日：1976-06-18

申请号：NL7514443

申请日：1975-12-11

Applicant: NORTHERN TELECOM INC

IPC: H04M3/32 ,  G01D5/12 ,  G06F11/04 ,  H04Q3/54

Abstract: Improvements in apparatus for measuring characteristics of a communications channel, characterized in that a programmable local unit is arranged in one of two terminals between which the measurement is made, to exchange analog test signals with the communication channel; a central digital computer device for exchanging digital information signals with the programmable local unit, and a first communication link between the control device and the local unit for retransmitting said digital information signals. (Machine-translation by Google Translate, not legally binding)