Abstract: A telephone line interface circuit comprises a controlled voltage generator for selectively generating a ringing voltage waveform for a telephone line or a supply voltage for a drive circuit for the telephone line, and a switching circuit interconnecting an output of the controlled voltage generator, the drive circuit, and the telephone line accordingly. In order to avoid creating a potentially hazardous condition on the telephone line, an interlock is provided between enabling of the controlled voltage generator and switching of the switching circuit, and software and hardware monitoring functions monitor operation of the control software and the controlled voltage generator and disable the controlled voltage generator in response to fault conditions or unusual behavior.

Abstract: A one piece two way voice communications earset which is situated in or at the ear of the user and which includes either two unidirectional microphones having their outputs combined or a single bi-directional microphone. The earset also includes a combination circuit for adding or subtracting the first and second signals output from the first and second microphones respectively.

Abstract: A support bracket for an electronic daytimer (e.g., a PDA or a PIM), a cellular telephone, and pager combination includes a housing with at least two indentions, one of which is sized to receive an electronic daytimer and the other of which is sized to receive a cellular telephone; power supply lines carried by the housing so as to connect with, and thereby provide power, to a received electronic daytimer and/or received cellular telephone; and a printer for an electronic daytimer secured to the housing and combined with a cable connecting it to a received electronic daytimer.

Abstract: A safe cordless telephone with a hands-free speakerphone is provided for use in showers or when taking a bath. The user-friendly cordless telephone can be readily attached and removed from any portion of the shower/bath unit, such as: a shower wall, shower door, sliding shower panel, towel rack, bracket, holder, or shower head pipe. The shower speaker telephone can also have a radio, interom, clock, and a display window to display the telephone numbers of outgoing and/or incoming telephone calls. The dependable cordless telephone is made of an impact-resistant plastic capable of withstanding water pressure and is insulated to prevent electrical shock. A water-resistant antenna extends upwardly from the telephone housing. A battery seal is positioned about the battery chamber to prevent water from entering into the battery chamber.

Abstract: A key unit is provided with a first print substrate on which a contact portion and a LED capable to be mounted on flat surface are mounted, a conductive contact rubber, placed on the first print substrate, having a movable contact portion which can contact with the contact portion and an open portion in which the LED is accommodated, a key button placed on the conductive contact rubber, a LED lens, placed on the edge portion of the open portion of the conductive contact rubber, which leads the light beam generated from the LED in the open portion, and a key case having a through hole into which the key button is slidably inserted and a lens insertion hole into which the LED lens is inserted. The key unit may also be provided with a chip resistor to protect the LED, which is mounted on the first print substrate at a position below a lower end face of the key case.

Abstract: A back clip structure for a mobile phone, including a main body, a clip member and a stand. The main body is formed with a restricting seat and an engaging slot for fitting with the clip member. The clip member has a first face formed with an inner recess for placing the stand therein and a second face disposed with a support arm for inserting into the restricting seat of the main body. A row of tooth blocks are disposed on the surface of the inner recess for engaging with the stand. The stand is placed in the inner recess of the clip member to support the mobile phone in an upright state. The stand is slidable along the slide channels for height adjustment. When used with a mobile phone case, the main body is disassembled from the clip member, permitting the mobile phone to be fitted into the mobile phone case. The main body and the clip member have the same height so that the charging operation will not be affected.

Abstract: An active impedance line interface circuit for connection to a two-wire telephone line comprises tip and ring unity gain d.c. amplifiers having outputs d.c. coupled via feed resistors to tip and ring wires respectively. Loop current and common mode current conducted via the feed resistors are monitored individually and converted to digital signals supplied to a digital control circuit, which can be programmed to provide desired operating conditions. Digital control signals produced by the control circuit are converted into analog signals and used to control currents passed by current sources through resistors at inputs of the d.c. amplifiers, thereby determining voltages at the d.c. amplifier inputs and hence on the tip and ring wires. These d.c. voltages are smoothed by capacitors used for coupling an a.c. signal to the d.c. amplifiers.

Abstract: A radiotelephone wrist instrument wherein the microphone and speaker are releasably mounted to the tips of respective fingers of the user's hand.

Abstract: Cellular telephone having a shield for protecting the user from electromagnetic radiation. The shield is mounted to the housing of the telephone and can be positioned between the antenna and the head of the person using the telephone to protect the person from radiation emitted by the antenna. In one presently preferred embodiment, the shield is fabricated of a plastic material having carbon fibers embedded therein for absorbing and dispersing electromagnetic radiation.

Abstract: A telephone handset having a volume actuator. The telephone handset includes a casing and a band formed from a resilient material. The band includes a molded portion that forms the volume actuator. The band encircles the telephone handset and is undermolded to the casing such that it is permanently affixed thereto. Thus, the volume actuator becomes an integral part of the telephone handset. A recess is defined between the band and the casing. An electric switch is disposed in this recess. Force transmitted to the volume actuator is transferred through the resilient material of the band and actuates the electrical switch in the recess. This force may cause the switch to either raise or lower the volume of the telephone handset.

Abstract: A portable telephone includes a telephone body; a circuit mounted in the telephone body for receiving a signal and for supplying a signal for transmission; and a bass reflex speaker connected with the telephone body and the circuit for radiating an audio signal therefrom in response to the transmitted signal, the bass reflex speaker including a housing connected to the telephone body, an opening in the housing, a speaker mounted in the opening of the housing and connected to the circuit for radiating an audio signal outwardly of the housing in response to the received signal, a tuned port in the housing for radiating a back wave audio signal of the speaker therethrough, a tube in the housing and connected with the tuned port for enhancing tuning of the tuned port, a pressure switch for activating the bass reflex speaker to radiate the audio signal when the telephone body is positioned on a surface in an upright position, and a volume control connected to the circuit and which controls a volume of the audio si

Abstract: A cradle having a depression configured to receive a handset. A latching mechanism is mounted on the cradle and includes two detents that are biased toward the depression so that the two detents are positioned within two openings in the handset to retain the handset in a secured position. The latching mechanism is movable to a second position wherein the detents are removed from the openings in the handset and the cradle also includes an ejecting mechanism which urges a first end of the housing out of the depression in the cradle. A deformable catch member is position on a first end of the cradle so as to engage with a lip formed on the first end of the housing to partially retain the handset in the depression in the cradle in a partially ejected position. The deformable catch member is flexibly mounted so that the user can remove the handset from the depression in the cradle by pulling up on the handset to force the lip on the handset past the deformable catch member.

Abstract: A hinge apparatus for a foldable telephone includes a body portion for mounting electronically operable parts and a flip member for covering the body portion. The flip member is assembled with the body portion by means of a pair of hinge shafts that pivot within a predetermined range of angles. A pair of resilient members are provided for influencing rotation of the hinge shafts. Each of the hinge shafts includes a resilient member contact portion that is engaged by a respective resilient member for enabling the flip member to snappingly pivot on the hinge shafts.

Abstract: A hinge mechanism for use in a portable telephone in which a foldable lid is rotatably supported by the hinge mechanism to rotate the foldable lid between an opened position and a closed position, includes a rotary shaft on which the lid is rotatably supported. A first spring, fitted to the shaft, generates a biasing force to rotate the lid on the shaft in a first direction from the closed position to the opened position. A second spring, fitted to the shaft, generates a biasing force to rotate the lid on the shaft in a second direction opposite to the first direction after the lid is further rotated from the opened position in the first direction. A first stopper restricts a rotation of the shaft in the first direction to cancel the biasing force of the first spring when the lid is further rotated on the shaft in the first direction from the opened position.

Abstract: A network interface enclosure for mounting on a vertical surface and for enclosing network interface devices. The network interface enclosure has subscriber and telco covers that permit access to subscriber and telco compartments. The subscriber cover and telco cover are attached to the base of the network interface enclosure by detent mechanisms so that the covers generally hinge about the detent mechanisms and can be retained in a variety of open positions. The detent mechanisms are attached to the upper portion of the subscriber and telco covers so that the subscriber and telco covers are lifted upwardly to open. Particular constructions of detent mechanisms are disclosed.

Abstract: A safe cordless telephone is provided for use in showers. The user-friendly cordless telephone can also be used when taking a bath or outside when it is raining. The dependable cordless comprises a special portable cordless handset with a water-resistant housing that provides a handset body. The handset body is made of an impact-resistant plastic capable of withstanding water pressure and is insulated to prevent electrical shock. A water-resistant antenna extends upwardly from the handset. A battery seal is positioned about the battery chamber to prevent water from entering into the battery chamber. An elastomeric rib is snugly positioned about the front and back of the handset to prevent water from entering into the interior of the handset and shorting the telephone circuitry. The earpiece and mouthpiece of the handset can also have water impermeable membranes to prevent water from passing into the earpiece and mouthpiece of the handset.