Abstract: In a folded armature assembly the vibratory end portion of the armature is prelocatable both translationally and rotationally relative to the facing pole surfaces of the permanent magnetic flux means before attachment of the supported portion of the armature to said means. The armature has wings extending laterally from the supported portion to form therewith a connecting bridge portion, and the wings are formed to provide pads extending normal to the bridge. A magnet strap with attached magnets fits slidably between the pads, with a clearance from the bridge of the armature, to permit said locations before the parts are permanently attached. After attachment and with the magnets magnetized, the armature may be adjusted substantially in translation to magnetic center between the pole faces by appropriate plastic deformation of the bridge. In a preferred embodiment, an improved structure is provided for viscoelastic damping of the undesirable second natural resonant mode of the folded armature.

Abstract: The armature of an electromagnetic transducer, extending through the polarizing flux between opposing permanent magnet pole faces, is snubbed to limit its shock-induced excursions normal to the directions of its extent and of the flux field. Such snubbing helps to protect the armature from plastic damage and accompanying shift of magnetic balance of the transducer upon the occurrence of a strong mechanical shock in an arbitrary direction.

Abstract: In a folded armature assembly the vibratory end portion of the armature is prelocatable both translationally and rotationally relative to the facing pole surfaces of the permanent magnetic flux means before attachment of the supported portion of the armature to said means. The armature has wings extending laterally from the supported portion to form therewith a connecting bridge portion, and the wings are formed to provide pads extending normal to the bridge. A magnet strap with attached magnets fits slidably between the pads, with a clearance from the bridge of the armature, to permit said locations before the parts are permanently attached. After attachment and with the magnets magnetized, the armature may be adjusted substantially in translation to magnetic center between the pole faces by appropriate plastic deformation of the bridge. In a preferred embodiment, an improved structure is provided for viscoelastic damping of the undesirable second natural resonant mode of the folded armature.

Abstract: The sharing of trunk groups is accomplished by performing incoming call routing analysis on the incoming call to determine if the call is intended for wireless applications on the network or for wireline applications on the network. The results of the incoming call routing analysis form the basis for determining those actions necessary to process the call. If the incoming call is wireless, executing the wireless related application code, notify the mobile switching center of the incoming call, and wait for directions. If the incoming call in wireline, attempting to deliver the call to a particular wireline, fire an advanced intelligent network (AIN) terminating trigger, and tandem the call through to another switch. Outgoing calls are simply allowed to hunt across shared trunk groups rather than being limited to trunk groups specified for the application.

Abstract: An improved ergonomic computer mouse provides comfortable and efficient usage by maintaining the hand of a user at a large acute angle to the horizontal. This is accomplished by a device that includes a base having an upstanding pedestal structure about which the palm and hands of the user extends in a more natural handshake manner at a large acute angle to the horizontal whereby the users wrist remains straight while grasping the mouse. Control means in the base and upstanding structure within easy reach of the users fingers allow the user to efficiently and comfortably control the computer operations. Indentations and an enlarged upper head portion provide for comfortable grasping and easy lifting of the mouse. The pedestal may be rotated 180 degrees to accommodate both right and left handed use. Add-on OEM, and custom fitted embodiments are also disclosed.

Abstract: Electrically conductive sheets comprising backplates for electret transducers are substantially encapsulated with hydrophobic electrically insulating coatings. The coatings are melt bonded to both faces of the sheets and to the edges of the sheet periphery. Likewise, the coatings are melt bonded to the interior edges of acoustic apertures in the sheets.

Abstract: A shielding enclosure for a magnetic flux producing device comprises inner and outer casings with closely fitting side walls. One or more leads extending from within the enclosure are laid down during assembly in a clearance slot or groove formed between the casing side walls, and thereafter threaded back out of the clearance slot or groove and extended through a closed aperture in the outer casing for terminal attachment.

Abstract: The vibratable diaphragm of an electret transducer has in its central plate portion one or more formed ribs, ridges or projections resting of a substantially flat backplate. These support the active regions of the diaphragm with precise spacing from the backplate. Elongate projections can be formed to relieve membrane stresses in the diaphragm. The flexural stiffness of the diaphragm is sufficient in itself to provide mechanical stability of the diaphragm in the presence of the destabilizing forces of electrostatic attraction by the backplate.