Abstract: The present invention is a partition apparatus suited for distancing and separating users from each other while keeping visual connectivity. The partition apparatus contains at least one partition receiver and at least one partition barrier. Each of the at least one partition receiver contains a fastener element. Each of the at least one partition barrier is connected adjacent to each of the at least one partition receiver through the fastener element.

Abstract: The present invention is a partition apparatus suited for distancing and separating users from each other while keeping visual connectivity. The partition apparatus contains at least one partition receiver and at least one partition barrier. Each of the at least one partition receiver contains a fastener element. Each of the at least one partition barrier is connected adjacent to each of the at least one partition receiver through the fastener element.

Abstract: An electro-acoustic driver includes a diaphragm formed of a compliant material, a bobbin configured to hold a winding of an electrical conductor and a housing having a housing axis that is substantially coaxial with the bobbin. The diaphragm is fixed to one end of the housing and a stiffening element is fixed to an inner region of a surface of the diaphragm. A motion of the bobbin along a bobbin axis generates a movement of the inner region of the diaphragm to thereby generate an acoustic signal that propagates from the diaphragm.

Abstract: An electro-acoustic driver includes a diaphragm formed of a compliant material, a bobbin configured to hold a winding of an electrical conductor and a housing having a housing axis that is substantially coaxial with the bobbin. The diaphragm is fixed to one end of the housing and has a substantially planar shape when the diaphragm is at rest. A stiffening element is fixed to an inner region of a surface of the diaphragm. A motion of the bobbin along a bobbin axis generates a movement of the inner region of the diaphragm to thereby generate an acoustic signal that propagates from the diaphragm.

Abstract: An electro-acoustic driver includes a diaphragm formed of a compliant material, a bobbin configured to hold a winding of an electrical conductor and a housing having a housing axis that is substantially coaxial with the bobbin. The diaphragm is fixed to one end of the housing and has a substantially planar shape when the diaphragm is at rest. A stiffening element is fixed to an inner region of a surface of the diaphragm. A motion of the bobbin along a bobbin axis generates a movement of the inner region of the diaphragm to thereby generate an acoustic signal that propagates from the diaphragm.

Abstract: An electro-acoustic driver includes a diaphragm formed of a compliant material, a bobbin configured to hold a winding of an electrical conductor and a housing having a housing axis that is substantially coaxial with the bobbin. The diaphragm is fixed to one end of the housing and has a substantially planar shape when the diaphragm is at rest. A stiffening element is fixed to an inner region of a surface of the diaphragm. A motion of the bobbin along a bobbin axis generates a movement of the inner region of the diaphragm to thereby generate an acoustic signal that propagates from the diaphragm.

Abstract: An electro-acoustic driver includes a diaphragm formed of a compliant material, a bobbin configured to hold a winding of an electrical conductor and a housing having a housing axis that is substantially coaxial with the bobbin. The diaphragm is fixed to one end of the housing and has a substantially planar shape when the diaphragm is at rest. A stiffening element is fixed to an inner region of a surface of the diaphragm. A motion of the bobbin along a bobbin axis generates a movement of the inner region of the diaphragm to thereby generate an acoustic signal that propagates from the diaphragm.

Abstract: An electro-acoustic transducer includes a cone, a voice coil connected to the cone, and magnetic circuit that defines a gap within which the voice coil is disposed. The magnetic circuit is configured for creating magnetic flux across the gap for the voice coil to interact with, thereby to drive motion of the cone. A conductor is included for providing an input signal to the voice coil. A first portion of the conductor is fixedly secured to the magnetic circuit such that the first portion of the conductor does not move relative to the magnetic circuit while the cone is in motion.

Abstract: An electro-acoustic transducer includes a cone, a voice coil connected to the cone, and magnetic circuit that defines a gap within which the voice coil is disposed. The magnetic circuit is configured for creating magnetic flux across the gap for the voice coil to interact with, thereby to drive motion of the cone. A conductor is included for providing an input signal to the voice coil. A first portion of the conductor is fixedly secured to the magnetic circuit such that the first portion of the conductor does not move relative to the magnetic circuit while the cone is in motion.

Abstract: Method and apparatus are provided for pumping operations that may be used to form perforations in the casing of a well, clean perforations and drill drain holes through perforations. A plunger is placed in a reference perforation and the pumping operations may be performed through a nozzle at a known location with respect to the reference perforation. The nozzle may be attached to a flexible hose to drill a drain hole or may be inserted in a body on the bottom of a tubing string. Addition apparatus and method are provided to insure that the plunger or plungers are maintained in a reference perforation or perforations when pumping operations are carried out through tubing.