GB2281006A

GB2281006A - Wireless microphone

Info

Publication number: GB2281006A
Application number: GB9316747A
Authority: GB
Inventors: Chao-Ming Yang
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-08-12
Filing date: 1993-08-12
Publication date: 1995-02-15
Also published as: GB9316747D0

Abstract

A wireless microphone device comprises an emitter 33 which transmits messages picked up by a microphone to a receiver 40 - 45 via high frequency. The receiver contains a pre-amplifier 44 and plugs into a microphone jack socket of a power amplifier. The transmissions may be coded 32 such that the pre-amplifier 44 in the receiver is switched on 43 only when the decoder 42 receives the correct code. <IMAGE>

Description

TITLE: A WIRELESS MICROPHONE DEVICE This invention relates to a wireless microphone device.

It has been found that the conventional wireless microphone sold in the marketplace, except the one for professional use, utilizes radio wave to transmit messages. However, the former cannot be adapted for use with a power amplifier, while the latter is too expensive.

Therefore, it is an object of the present invention to provide a wireless microphone device which may obviate and mitigate the above-mentioned drawbacks.

This invention relates to a wireless microphone device.

It is the primary object of the present invention to provide a wireless microphone device which utilizes high frequency to transmit messages picked up by a microphone to a power amplifier.

It is another object of the present invention to provide a wireless microphone device which may avoid disturbance even if more than two microphones are used simultaneously.

It is still another object of the present invention to provide a wireless microphone device which is simple in construction.

It is still another object of the present invention to provide a wireless microphone device which is low in cost.

It is a further object of the present invention to provide a wireless microphone device which is convenient to use.

With the above and other objects in view, the invention consists of the improved ratchet wrench, and all its parts and combinations, as set forth in the claimes, and all equivalents thereof. In the accompanying drawings illustrating one complete embodiment of the preferred form of the invention, in which the same'reference numerals designate the same parts in all of the views.

FIG. 1 is a working view of the present invention; FIG. 2 is a perspective view of the receiver; and FIG. 3 is a circuit diagram of the present invention. While the present invention is susceptible of embodiment in various forms, there is shown in the drawings and will hereinafter be described a presently preferred embodiment of the invention, with the understanding that the present disclosure is to be considered as an exemplification of the invention, and is not intended to limit the invention to the specific embodiment illustrated.

Referring to FIG. 1, there is shown a working view of the present invention. As illustrated, the wireless microphone device according to the present invention comprises a microphone emitter 10 which can emit high frequency signal to a receiver 12. The receiver 12 is connected with the microphone jack of an amplifier or a radio cassette recorder 13 so that the message picked up by the microphone will be amplified by the amplifier or radio cassette recorder 13 and then sent out from the loudspeaker 14.

As may be seen in FIG. 2, the receiver 21 is generally rectangular in shape. The signal received by the receiver 21 will be first amplified by a pre-amplifier (not shown), transmitted to the microphone jack 23 of the radio cassette recorder or the amplifier, and then amplified by the radio cassette recorder or the amlifier.

Looking now at FIG. 3, the message picked up by the microphone 30 is first amplified by the amplifying circuit 31, amplified by the amplifying circuit 31, and then transmitted to the high frequency circuit 33! Codes are locked up by the coding circuit 32, then transmitted to the high frequecy circuit 33, and broadcast by the antenna 34.

When the antenna 40 of the receiving circuit recceives message, the message will be amplified by the high frequency circuit 41. By means of the set up of the decoding circuit 42 so as to be sychronous with the emitted signal, the switching circuit 43 will be turned on thereby supplying power to the pre-amplifying circuit 44.

Then, the message will be amplified by the pre-amplifying circuit 44 and transmitted to the power amplifier via the microphone jack 45.

As various possible embodiments might be made of the above invention without departing from the scope of the invention, it is to be understood that all matter berein described or shown in the accompanying drawings is to be interpreted as illustrative and not in a limiting sense.

Thus it will be appreciated that the drawings are only exemplary of preferred embodiments of the invention.

Claims

CLAIMS:

1. A wireless microphone device comprising an emitter which transmits messages picked up by a microphone to a receiver via high frequency, said receiver being connected with a microphone jack of-a power amplifier so as to amplify the messages.

2. The wireless microphone device as claimed in Claim 1, further comprising a coding device designed for advoiding disturbance even if more than two microphones are used simultaneously.

.3. The wireless microphone device as claimed in Claim 1, wherein when the decoding of the receiver is sychronous with the coding of the emitter, the power supply will be turned on thereby supplying power to a pre-amplifier.