Abstract: A connector structure for attaching a hand microphone to a voice recorder 11 includes a recorder-side connector, a pre-load applying member and an operation ring. The pre-load applying member applies a pre-load by pushing a rear end of a connector housing of a mikeside connector while the mikeside connector is joined to the recorder-side connector. The position of the pre-load applying member is adjustable in the axial direction of the recorder-side connector by means of the operation ring, so as to apply a proper pre-load to the mikeside connector, thereby stabilizing the joint regardless of variations in axial length of the mikeside connector. As using no coil spring, the connector structure does not provide repulsion during the attaching operation.

Abstract: A connector structure for attaching a hand microphone to a voice recorder 11 includes a recorder-side connector, a pre-load applying member and an operation ring. The pre-load applying member applies a pre-load by pushing a rear end of a connector housing of a mikeside connector while the mikeside connector is joined to the recorder-side connector. The position of the pre-load applying member is adjustable in the axial direction of the recorder-side connector by means of the operation ring, so as to apply a proper pre-load to the mikeside connector, thereby stabilizing the joint regardless of variations in axial length of the mikeside connector. As using no coil spring, the connector structure does not provide repulsion during the attaching operation.

Abstract: An instrument amplifier includes an amplifier circuit for amplifying a sound signal input from an electric guitar. A main speaker emits sound according to the sound signal being amplified. A CD player plays back an audio signal from an audio CD. Side speakers for playback emits audio sound according to the audio signal being played back. A speaker box contains the main speaker and the side speakers in one space. In one embodiment, the speaker box includes a rear panel for closing a space behind the main speaker and the side speakers. Furthermore, an output mode key is settable in a first mode by external operation, the first mode being for controlling the playback speaker to emit sound according to the sound signal. The side speakers are disposed beside one another, for stereo sound emission of the audio sound.

Abstract: An indexing device for providing signals identifying the address in a memory device of stored information corresponding to any selected listing in the index has a housing in which is stacked a quantity of index cards of the type enabling a plurality of listings to be entered on each card. The housing can be closed by a hinged cover which carries an indicator that can be moved to line up with card identifying indicia marked on the cover. The indicator is pivotally mounted on a carriage that is slidably mounted at one edge of the cover. Disposed in the housing along the path of travel of the slidable indicator is a position sensor which detects the position of the indicator at stations which are disposed along the indicator's travel path to match the alignment of the indicator with the card identifying indicia on the cover.