Abstract: A twin lever key with horizontal finger pads for code transmission when used with an electronic iambic keyer in Amateur Radio, the index finger and the middle or third finger of the operator resting on the finger pads, whereby signals are generated by pressing the finger pads of either of the two arms singly or in combination thereof, to produce the dot and dash code signals in iambic predetermined code sequences. There is no lateral wrist or hand action as is typical of the common "paddle key" since the hand is held in the horizontal plane and the key is activated by downward vertical motion from the fingers. The key may be used for code practice, normal continuous wave (cw) operating or contesting.

Abstract: This invention describes an electromechanical amplifying sound transducer including a diaphragm which responds to input energy, such as acoustical waves and mechanical pulses, and vibrates in response thereto. Conductive supports mounted onto the diaphragm are adapted to be interconnected to a source of electrical energy. A weighted conductive bar is loosely coupled to the supports and interconnects them. The supports transmit the vibrations to the bar whereby the bar can control the electrical energy delivered from the source of electrical energy so that the acoustic waves or mechanical pulses are converted into amplified electrical waves.