Abstract: A jack socket that comprises a body that defines an axial bore adapted to receive a phone jack, and an annular groove at each of at least two axially-spaced locations along the axial bore. Each annular groove is concentric with, perpendicular to, and faces into, the axial bore. The jack socket additionally comprises an annular spring member corresponding to each annular groove. The annular spring member includes a radially-outer portion housed in the annular groove and a radially-inner portion extending into the axial bore. Finally, the jack socket comprises an electrical connection through the body to each annular spring member.

Abstract: A jack socket comprises a body in which are formed an axial bore adapted to receive a phone jack, an annular groove in at least two locations spaced along the axial bore, concentric with, perpendicular to, and facing radially into the axial bore, and an access port extending radially through the body into each annular groove. A toroidal coil spring is housed in each annular groove, and includes a radially-inward facing circumference projecting into the axial bore to contact the circumference of the jack plug. An electrical connection extends through the access port to the coil spring mounted in each annular groove. A jack socket installable in a mounting hole and requiring no more access to the back of the mounting hole during installation than that provided by the mounting hole comprises a body shaped and dimensioned to be closely received by the mounting hole. An axial bore and plural radial bores are formed in the body.

Abstract: An electro-mechanical pickup for a musical instrument having a plurality of strings. The pickup includes a core, a first piezoelectric transducer element connected in parallel with a second piezoelectric transducer element, and a two-conductor output lead. Using two piezoelectric transducer elements connected in parallel increases the output voltage and capacitance of the pickup compared with using a single piezoelectric transducer element. The core is elongated, and has a first face opposite a second face. The first piezoelectric transducer element includes first and second electrodes on opposite faces of a first piezoelectric film. The second piezoelectric transducer element includes third and fourth electrodes on opposite faces of a second piezoelectric film. The piezoelectric transducer elements are each responsive to more than one string of the musical instrument. The first piezoelectric transducer element is stacked on the core with the second electrode in contact with the first face of the core.

Abstract: An electro-mechanical pickup for a stringed musical instrument, such as a guitar, fits in the bottom of the saddle slot of the instrument and provides an electrical output signal representing the vibrations of the strings of the instrument. The electrical output of the transducer is generated by a piezoelectric transducer element having an long, narrow piece of piezoelectric film with an electrode on each face. One electrode of the piezoelectric transducer element is attached to the conductive face of an elongated core. One conductor of a two-conductor electrical output lead is also attached to the conductive face of the core. The core provides electrical contact and a strong mechanical attachment for the output lead. A conductive contact strip is attached to the second electrode of the piezoelectric transducer element, and the second conductor of the output lead is attached to the contact strip.

Abstract: A cabinet includes a downturned arcuate top having an upstanding flange at the front edge and spaced apart upstanding support members at the rear edge. Elongate flexible items, such as sections of vacuum hose, are stored upon the top intermediate the flange and the support members. Cradles, carried by the support members, hold elongate rigid items, such as vacuum hose extensions and handle sections of various equipment. Cleaning heads and other attachments are engaged with and suspended from sockets formed in the bottom of the cabinet. Other items are held by hooks which depend from the cabinet. The cabinet is also provided with a shelf and lockable doors for storage of small items and toxic or poisonous materials.