The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 07, 1978
Filed:
Jan. 17, 1977
Radamis Botros, Ottawa, CA;
Conrad Damien Lafrance, Lucerne, CA;
Northern Telecom Limited, Montreal, CA;
Abstract
A telephone apparatus for use in a conference room has a housing, with a vertical central axis, with a loudspeaker at the upper end, coaxial with the vertical axis, and a microphone at the lower end. The loudspeaker faces upward with an unrestricted outlet and is omnidirectional in output. The microphone faces downward and is coaxial with the vertical axis, being sensitive only to airborne vibration only. The microphone is surrounded by an inclined surface extending outwardly and upwardly at an angle of about 30.degree., and has an omnidirectional sensitivity. The housing is supported with the microphone inlet about 1/2 inch above a surface, which can be the surface of a base member attached to the housing. The minimal peripheral distance from the center line of the speaker to the center line of the microphone, around the housing, is about 15 inches, for good acoustic separation. A resonator can be attached to the microphone inlet.