 Coded health-care glove |
| The above disadvantages and drawbacks of prior health-care gloves are largely obviated by the ... |
|
| High resolution quadrilinear CCD imager with four channel to one channel multiplexing |
| OF THE INVENTION FIG. 1 of the present application shows a conventional prior art quadrilinear ... |
|
| Method and apparatus for remotely controlling an electrical appliance |
| According to the invention, an electrical appliance connected across an alternating current power ... |
|
| Video camera |
| It is an object of the invention to provide a video camera having a specific structural arrangement,... |
|
| Input video processor for color television cameras |
| The present invention provides means for overcoming the shortcomings of previous mention of typical ... |
|
| Shading correction device |
| Accordingly, the present invention has been made to overcome the above-noted problem involved in ... |
|
| Image sensing device with non-linear converting means |
| This invention is directed to the solution of these problems of the prior art. It is, therefore, ... |
|
| Method for communicating between a microprocessor and an interface circuit |
| OF THE DRAWINGS FIG. 1 is a block diagram of a battery maintenance system 10 which uses a protocol ... |
|
| Monitor screen graphic value indicator system |
| The present invention overcomes the shortcoming and deficiency of the prior art by providing a ... |
|
|
Signaling system
| Details |
Inventors: Peterson, Eugene;
Assignee: Bell Telephone Laboratories, Incorporated (Murray Hill, NJ)
Primary Examiner: Birmiel; H.A.
Assistant Examiner:
Attorney, Agent or Firm: Burgess; H. A.
1. In a speech privacy transmission system, means for analyzing speech currents into component frequency band currents in a plurality of separate circuits, a corresponding plurality of separate transmission channels, a common keying circuit having an input side and an output side for keying each of said frequency band currents in succession, distributor means for connecting the input side of said keying circuit to each of said plurality of separate circuits in rotation to enable the frequency band currents therein to be keyed in succession, and distributor means for connecting the output side of said keying circuit to each of said plurality of transmission circuits in rotation to enable the keyed currents to be individually transmitted over said respective channels. |
|
DETAILED DESCRIPTION What is claimed is: 1.
In a speech privacy transmission system, means for analyzing speech currents into component frequency band currents in a plurality of separate circuits, a corresponding plurality of separate transmission channels, a common keying circuit having an input side and an output side for keying each of said frequency band currents in succession, distributor means for connecting the input side of said keying circuit to each of said plurality of separate circuits in rotation to enable the frequency band currents therein to be keyed in succession, and distributor means for connecting the output side of said keying circuit to each of said plurality of transmission circuits in rotation to enable the keyed currents to be individually transmitted over said respective channels.
2.
In a speech privacy transmission system, means for analyzing speech currents into component frequency band currents in a plurality of separate circuits, a corresponding plurality of separate transmission channels, a common keying circuit having an input side and an output side for keying each of said frequency band currents in succession, distributor means for connecting the input side of said keying circuit to each of said plurality of separate circuits in rotation to enable the frequency band currents therein to be keyed in succession, distributor means for connecting the output side of said keying circuit to each of said plurality of transmission circuits in rotation to enable the keyed currents to be individually transmitted over said respective channels, and a holding circuit in each of said transmission circuits to prolong the keyed currents in said transmission circuits.
3.
The system claimed in claim 2 in which said holding circuit in each of said channels comprises a stepper for maintaining the current in each transmission channel at substantially constant value during the time the keying circuit is connected to the others of said channels.
4.
In signal transmission, means to sample each of a plurality of different signal currents in succession, a common means for altering the character of the sampled currents to provide secrecy of transmission, a transmitting medium, means to superpose multiplex channels on said medium operating in different frequency bands, and distributor means for sending each sampled current after its character has been altered by said common means into a different one of said multiplex channels for transmission over said medium
|
|
Television 
