Renseignements généraux

Nº de série

4,937,877

Nº de partie

1

Nombre total de parties

1

Ou

Plaque

Brevets

S/O

Description générale

Wood-fibre board with a paper (possible) image mounted on the proper front

Dimensions

Remarque : Cette information reflète la taille générale pour l’entreposage et ne représente pas nécessairement les véritables dimensions de l’objet.

Longueur

28,3 cm

Largeur

22,1 cm

Hauteur

1,2 cm

Épaisseur

S/O

Poids

S/O

Diamètre

S/O

Volume

S/O

Lexique

Groupe

Communications

Catégorie

Archives

Sous-catégorie

S/O

Fabricant

Ou

Patent Office US

Pays

United States of America

État/province

Inconnu

Ville

Inconnu

Contexte

Pays

Canada

État/province

Ontario

Période

ca. 1990-1998

Canada

Bell Northern Research, was the research and development subsidiary of Northern Telecom (later Nortel Networks) and Bell Canada. It was built by Northern Telecom at its Trans-Canada plant in Montreal. Northern Telecom and its predecessor, Northern Electric, was for decades Canada’s largest manufacturer of telecommunications equipment. Originally a subsidiary of the AT&T-owned Western Electric, for which it manufactured American-designed products for the Canadian market, Northern Electric became Canadian-owned in the 1950s and in the 1960s began to design and produce equipment to meet the distinctive needs of Canadian telecommunication companies. In the 1970s, through its new research subsidiary, Bell Northern Research, the company made a concerted shift from conventional analogue equipment into the emerging field of digital communications, becoming in the 1980s the first equipment supplier to provide a complete line of fully digital switching and transmission gear. During this decade the company moved aggressively into export markets, and opened manufacturing and R&D operations in several countries. The company’s sales soared during the internet boom of the 1990s, but a combination of poor financial decisions and a failure to maintain its technological edge led eventually to its bankruptcy in 2009. The original Bell Northern facilities were designed with cutting edge telecommunications research and development in mind with the first three buildings on the campus featuring laboratories, an extensive research library, and an anechoic chamber. The anechoic chamber was the focal point of the Bell Northern Research acoustics research examining both the technology and placement of speakers and microphones in telecommunication devices. The anechoic chamber group was organized under the Industrial Design and working together with design were responsible for the development of the acoustic properties of most products. (From the Acquisition Proposal, see Ref. 1)

Fonction

Used to protect and stake claim to a particular technology. (From the Acquisition Proposal, see Ref. 1)

Technique

Inconnu

Notes sur la région

Inconnu

Détails

Marques

On the proper front: "United States Patent [19]/ [11] Patent Number: 4,937,877/ Pocock et al./ [45] Date of Patent: Jun. 26, 1990/ [54] MODULATE MICROPHONE ASSEMBLY/ [75] Inventors: Mark W. Pocock; Bradley P. Basnett,/ both of Ottawa; Michael K./ Eldershaw, Nepean; Peter Fatovic,/ Ottawa; Jacques Gagnon, Kanata;/ Nahum Goldmann, Nepean; Conrad/ D. Lafrance, Aylmer; Anthony J./ Langenberg, Kanata; W. John/ McKeen, Ottawa, all of Canada/ [73] Assignee: Northern Telecom Limited, Montreal,/ Canada/ [21] Appl. No.: 244,155/ [22] Filed: Sep. 14, 1988/ [30] Foreign Application Priority Data"/ Various U.S. and foreign patent documents cited and listed/ "Primary Examiner - Jin F. Ng/ Assistant Examiner - danita R. Byrd/ Attorney, Agent or Firm - Michael M. Sakovich/ [57] ABSTRACT/ A modular microphone assembly housed in a handsfree/ telephone apparatus provides an environment that is/ isolated from a loudspeaker installed within the appara-/ tus and through which environment the directional and/ frequency response characteristics of a directional mi-/ crophone capsule contained within a closable cavity of/ a microphone mounting receptacle in the assembly are/ altered via a predetermined internal surface configura-/ tion of the receptacle to improve the performance of the/ apparatus./ 20 Claims, 5 Drawing Sheets"/ Below is a diagram labelled with several numbers./ On the proper back, in pencil: "68843"/ The "4" seems to be written over a previously written "5"

Manque

Appears complete

Fini

Plaque has a white proper front with black text and diagram, black edges, and a brown proper back.

Décoration

S/O