Portable TV transmitter

• US 4,504,861 A
• Filed: 02/18/1982
• Issued: 03/12/1985
• Est. Priority Date: 02/18/1982
• Status: Expired due to Fees

• Current Assignee: Emcee Incorporated
• Original Assignee: Emcee
• Inventors: Dougherty, Joseph P.
• Primary Examiner(s): Chin, Tommy P.
• Application Number:
  US06/349,961
• Time in Patent Office: 1,118 Days
• Field of Search: 358/186, 358/143, 358/146, 358/185, 358/229, 358/254, 358/906, 358/83, 358/209, 455/95, 455/100, 455/128
• US Class Current: 348/485
• CPC Class Codes: H04N 5/38 Transmitter circuitry for the transmission of television signals according to analogue transmission standards H04N5/14 takes precedence

Abstract

A portable TV transmitter is provided on a harness. The transmitter may be carried by a person on the back thus leaving the hands free for operating a TV camera coupled with the transmitter. The transmitter is equipped with a multi-directional antenna, a rechargeable battery pack and a battery charger. The battery pack and charger may be removed during the charging operation.

Claims

1. A portable TV transmitter comprising:

means for receiving video signals from a first video signal generator;

a video signal oscillator which produces video oscillator signals at a select frequency;

means for modulating the video oscillator signal by the video signals to produce processed video signals;

means for receiving audio signals from an audio signal generator;

an audio signal oscillator which produces an audio oscillator signal;

means for modulating the audio oscillator signal by the received audio signals to produce modulated audio signals;

means for mixing the video oscillator signals with the modulated audio signals to produce processed audio signals;

means for combining the processed audio signals and the processed video signals to produce composite television signals;

means for emitting the composite television signals; and

means of providing power for the transmitter.

2. The portable TV transmitter of claim 1 wherein the first video signal generator is a TV camera.

3. The portable TV transmitter of claim 2 also comprising a first amplifying means to amplify the processed video signals before they are combined with the processed audio signals.

4. The portable TV transmitter of claim 3 also comprising a second amplifying means to amplify the processed audio signals before they are combined with the processed video signals.

5. The portable TV transmitter of claim 4 also comprising a third amplifying means for amplifying the composite television signals.

6. The portable TV transmitter of claim 5 also comprising a means of filtering said composite television signals before transmission to eliminate or suppress undesirable components of the composite television signals.

7. The portable TV transmitter of claim 6 also comprising of means of receiving video signals from a second video signal generator.

8. The portable TV transmitter of claim 7 wherein said second video signal generator is a second TV camera.

9. The portable TV transmitter of claim 7 wherein the second video signal generator is a video recorder.

10. The portable TV transmitter of claims 8 or 9 wherein said means for modulating the video oscillator signal is adjustable.

11. The portable TV transmitter of claim 10 also comprising means for monitoring the composite television signals being emitted by the transmitter.

12. The portable TV transmitter of claim 11 wherein the means of providing power comprise a plurality of battery cells.

13. The portable TV transmitter of claim 12 wherein said batteries get discharged during the operation of the TV transmitter and also comprising means for indicating that the batteries are discharged.

14. The portable TV transmitter of claim 13 wherein said batteries are rechargeable.

15. The portable TV transmitter of claim 14 also comprising a means of charging said rechargeable batteries.

16. The portable TV transmitter of claim 15 wherein the rechargeable batteries and the battery charging means are removable from the transmitter during the charging of the batteries.

17. The portable TV transmitter of claim 16 wherein the battery charging means comprise means of indicating that the batteries are charged to an acceptable level.

18. The portable TV transmitter of claim 11 wherein said first or second video signal generator comprises a powerswitching means connected to said power providing means so that when said switching means is activated, the first, second and third amplifying means receive power from said power providing means.

19. The portable TV transmitter of claim 18 wherein said transmitter receives power when said power switching means is activated.

20. The portable TV transmitter of claim 1 wherein said means for emitting the television signal comprise an antenna.

21. The portable TV transmitter of claim 20 wherein said antenna is multi-directional.