Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Housed microphone
Reexamination Certificate
2001-11-09
2003-07-22
Barnie, Rexford (Department: 2643)
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Housed microphone
C381S355000, C338S178000, C338S179000
Reexamination Certificate
active
06597796
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the invention
This invention relates to a microphone with a variable resistance switch.
2. Description of the related art
FIGS. 1
to
3
illustrate a conventional microphone switch
100
for a microphone which is adapted to be connected to at least a speaker system (not shown) The switch
100
includes a U-shaped mounting frame
1
, and a slide member
2
that is disposed movably in the mounting frame
1
, that is formed with two parallel grooves
201
at a bottom side, and that is movable between ON and OFF positions. A terminal member
3
is mounted in the mounting frame
1
, and has aligned first, second and third pairs of conductive rails
301
,
302
,
303
. A pair of conductive contact members
304
are fittingly and respectively received in the grooves
201
, and are engageable with the first and second pairs of the conductive rails
301
,
302
when the slide member
2
is at the ON position so as to complete a circuit in the microphone, and with the second and third pairs of the conductive rails
302
,
303
when the slide member
2
is at the OFF position so as to short the circuit. The microphone is disadvantageous in that a relatively large noise is generally produced by the speaker system due to an abrupt change in the resistance of the circuit upon switching of the slide member
2
to the ON position.
SUMMARY OF THE INVENTION
Therefore, the object of the present invention is to provide a microphone with a variable resistance switch so as to overcome the aforesaid drawbacks.
According to the present invention, a microphone comprises: a housing; a terminal member disposed in the housing and including a plurality of spaced apart terminals; and a variable resistance switch. The switch includes at least an elongated resistance member disposed in the housing, extending in a longitudinal direction, and having opposite first and second ends connected to respective ones of the terminals. An elongated conductive member is disposed in the housing adjacent and parallel to the resistance member, and has one end connected to a respective one of the terminals. A slide member includes at least a resilient conductive wiper that is disposed in the housing and that is simultaneously and constantly in sliding contact with the resistance member and the conductive member so as to complete a circuit through the terminals, the conductive member, and the resistance member. The slide member is operable to move in the longitudinal direction between an ON position, in which, the wiper is in sliding contact with the second end of the resistance member, and an OFF position, in which, the wiper is in sliding contact with the first end of the resistance member. The wiper is slidable over the conductive member and the resistance member so as to linearly vary the resistance in the circuit when the slide member moves between the ON and OFF positions.
REFERENCES:
patent: 3633146 (1972-01-01), Sasaki et al.
patent: 3643046 (1972-02-01), Zdanys et al.
patent: 4085399 (1978-04-01), Wall
patent: 4357592 (1982-11-01), Okuya
patent: 4771263 (1988-09-01), Crook et al.
patent: 5706359 (1998-01-01), Chang
Barnie Rexford
Brinks Hofer Gilson & Lione
Dabney P.
LandOfFree
Microphone with a variable resistance switch does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Microphone with a variable resistance switch, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Microphone with a variable resistance switch will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3004199