Motorola Corporation

Danny E Ross

David E Reiff

Robert W Pennisi

Thomas J Swirbel

William B Mullen, Iii

Frank M Tyneski

Rudy Yorio

Andrzej T Guzik

John F Murray

Gregory D Jackson

Adolph C Naujoks

Frank Garcia

Angelita Alarcon

Raymond C Vivian, Jr

Ileana Isern-Flecha

James M Mueller

Larry O Bond

A piezoelectric active-mode incrementor switch system (,) includes two ratchet wheels (,) that are rotationally mounted on a drive shaft (,) having a knob (,). The ratchet wheels (,) form a slipping clutch with their respective drive wheels (,) which are rigidly mounted to the drive shaft and mechanically loaded with spring (,). The ratchet wheels (,) are mounted inversely to each other on the drive shaft (,) and make contact with their respective cantilever beams (,) which each have a piezoelectric film. In operation, the switch (,) functions by mechanically stimulating the piezoelectric beams. When the knob (,) is rotated in one direction, only one of the beams (,) is displaced causing a generation of an electrical charge that acts as a signal. The other beam (,or,) is prevented from moving and therefore its beam does not produce a signal. When the knob (,) is rotated in the opposite direction, the other beam that was previously prevented from moving is displaced causing an electrical signal to be generated by the switch.

Switch system

A conformal shield (10) includes a conformal shield base (15), and a conductive layer (16). The conformal shield base (10) has a first conformable insulating material (12) having a characteristic softening point at a first temperature. A second conformable insulating material (14), which has a characteristic softening point at temperature higher than the first temperature, is overlaid on the first conformable insulating material (12). The conductive layer (16) is disposed on the conformal shield base (15) to form the shield (10).

Conformal shield and method for forming same

A cam actuated control device (10) is provided. The control device (10) includes at least two momentary switches (13, 14) which are surface mounted on a circuit substrate (12). An actuating member (20) having a contoured cam surface (25) is movably positioned proximate to the switches (13, 14) such that movement of the actuating member (20) selectively actuates the switches (13, 14) to produce a binary encoded output.

Cam actuated control device including a plurality of binary switches

A speaker assembly (100) includes a speaker (202) having at least one speaker terminal (206) and a magnet (204) which generates a magnetic field. The speaker assembly (100) also includes a circuit board (116) having at least one terminal (110). A metal member (106) is coupled to the circuit board (116) and is used to magnetically attach speaker (202) to circuit board (116). Upon speaker (202) being magnetically coupled to circuit board (116), the at least one speaker contact (206) becomes coupled to speaker terminal (110). Thereby, allowing for a quick way of attaching and detaching speaker (202) to and from circuit board (116).

Interconnection of a speaker using magnetic coupling

Apparatus for discharging accumulated electrostatic charge from the human body includes a conductive ring to be worn on a finger. A first connector is attached to and electrically connected to the conductive ring. A cable with a mating connector plugs into the first connector. A second connector at the other end of the cable is connected to ground. A series resistor, located in the mating connector housing, limits current flow to a safe level in the event the user comes into contact with a high voltage high current source.

Grounding ring

This apparatus is especially useful as a conversion kit and includes a new front cover for a portable radio telephone having a plurality of push buttons mounted therein, which push buttons activate a tone generator, the tones from which are applied to a timer and through a multi-contact relay to the speaker and transmitter of the radio telephone. The timer is utilized to activate the relay for 90 milliseconds each time a tone is produced by the tone generator so that a tone is transmitted for only 90 milliseconds and when a tone is not being generated the transmitter is connected to a microphone and the speaker is connected to the receiver in the normal operating manner by the relay.

Dialing apparatus for a portable radio telephone

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Plantation, FL, United States of America

Danny E Ross