Abstract: The Green Screen is an environmentally friendly way to make topsoil. The Green Screen does not use gas, electricity, air compression or any external power source to operate. The operator simply shovels/moves dirt onto the screen whereby the springs/coils begin to bounce under the weight of the dirt, thus sifting out the topsoil by way of its own movement. The rocks and unwanted materials stay on top of the screen or roll forward, while all the topsoil has been separated out and is ready for distribution.

Abstract: The device and method disclosed deals with the operation of a cross-band simplex radio frequency communications system. In a system having a first band receiver on a first radio frequency band for receiving and demodulating a first received signal, and a second band transmitter using a second radio frequency band to modulate and transmit the demodulated first received signal so as to communicate audio and signaling received by the receiver in one band to the transmitter of another band when in a cross band mode. There is also at least a second band receiver using the second radio frequency band typically associated with the second frequency band transmitter for receiving signals containing audio and signaling which is to be communicated to a first band transmitter so as to reply to the signal received on the first band receiver.

Abstract: The device and method disclosed deals with the operation of a cross-band simplex radio frequency communications system. In a system having a first band receiver on a first radio frequency band for receiving and demodulating a first received signal, and a second band transmitter using a second radio frequency band to modulate and transmit the demodulated first received signal so as to communicate audio and signaling received by the receiver in one band to the transmitter of another band when in a cross band mode. There is also at least a second band receiver using the second radio frequency band typically associated with the second frequency band transmitter for receiving signals containing audio and signaling which is to be communicated to a first band transmitter so as to reply to the signal received on the first band receiver.