Browse Prior Art Database

Adjustable Audio Indicator

IP.com Disclosure Number: IPCOM000043200D
Original Publication Date: 1984-Jul-01
Included in the Prior Art Database: 2005-Feb-04
Document File: 2 page(s) / 40K

Publishing Venue

IBM

Related People

Baechtle, CP: AUTHOR [+4]

Abstract

It is desirable in keyboards to have the option of audio response as each key is depressed, this option being exercised by the operator. Fig. 1 illustrates a method of mechanically controlling and varying the level of audio response, utilizing an "off-the-shelf" audio transducer. A feature of this design is the simple control of audio level by linear adjustment (via thread) of the conical portion of the volume control knob in the orifice of the audio transducer. This system is composed of three components: plastic housing 10, volume control knob element 16, and audio transducer 14. Once assembled, knob element 12 may be rotated manually clockwise or counterclockwise until the desired level of sound is achieved.

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Adjustable Audio Indicator

It is desirable in keyboards to have the option of audio response as each key is depressed, this option being exercised by the operator. Fig. 1 illustrates a method of mechanically controlling and varying the level of audio response, utilizing an "off-the-shelf" audio transducer. A feature of this design is the simple control of audio level by linear adjustment (via thread) of the conical portion of the volume control knob in the orifice of the audio transducer. This system is composed of three components: plastic housing 10, volume control knob element 16, and audio transducer 14. Once assembled, knob element 12 may be rotated manually clockwise or counterclockwise until the desired level of sound is achieved. Rotation of element 12 moves its conical portion 16 toward and away from the sound orifice 18 of transducer 14 by operation of the thread 20, between the fully closed position shown in full orifice line and the fully open position shown in dotted line. Maximum clockwise rotation opens orifice 18 fully and produces maximum sound level, and, conversely, maximum counterclockwise rotation seats portion 16 in orifice 18 and produces minimum sound level. Element 12 carries a stop 20 which bears against the audio orifice structure 22 of transducer 14 when portion 16 seats in orifice 18, to prevent damage to structure 22 by portion 16. The audio transducer 14 is driven logically at two discrete frequencies (2000 or 3000 CPS) which provid...