Abstract: In accordance with the present invention, an apparatus for developing a latent image formed on a photoreceptor, which is deposited on an interior surface of an output window of a display device, is disclosed. The developing apparatus includes a developing chamber, having a support surface for supporting the output window, a screen structure material reservoir for storing, deagglomerating and feeding the screen structure material, and a triboelectric gun assembly communicating with the reservoir. The gun assembly triboelectric charges and imparts a desired charge polarity to the screen structure material. The gun assembly further includes at least one material dispersing nozzle spaced from the support surface for distributing the charged material for deposition onto the latent image.

Abstract: In a cordless telephone set, a single RF communications channel selection switch, which may be mounted on either of the base unit and handset unit, selects the frequency for the unit to which it is mounted. The other unit of the base unit and handset unit selects alternate frequencies in response to a series of unacknowledged communications, until it receives an acknowledgement on a particular channel. After receiving an acknowledgement, an indication of the current RF communications channel is stored in memory. If no acknowledgement is received after trying all channels, then the original RF communications channel is selected.

Abstract: The present invention relates to a cordless telephone unit having a handset and a base unit. The signal strength of a handset which is received by the base unit is examined to determine whether or not the handset is beyond a predetermined range from the base unit. If such determination of out-of-range is made, a warning signal is transmitted from the base unit to the handset and if the handset is not brought within range within a predetermined number of warning signals, a hang up is initiated wherein the handset is placed in an "on" hook condition and the captured telephone line is released.

Abstract: The present invention is directed to a telephone unit having a redial capability wherein if the number called is busy and a redialing is desirable, a determination is made as to whether a dialing operation has taken place since the telephone was placed in an "off" hook status. If no dialing operation has taken place, then the telephone will dial the desired redial number which is the last dialed telephone number. If the determination is that a dialing operation has taken place since the phone was placed in an "off" hook status, then an operation is initiated upon initiating the redial order command where the telephone is electronically placed in an "on" hook status in order to release the telephone line of the telephone network, and then is reestablished in an "off" hook status for capturing a line of the telephone network. Upon capturing a line of the telephone network, the redial system redials the desired telephone number.