Abstract: A multi-swivel connector for connecting a fluid-operated tool to a fluid source has a post having an axis, a swivel unit having an axis extending perpendicular to the axis of the post, at least one fluid line entering the post at one end of the post and exiting on the a swivel unit at another end of the post, a fitting unit connected to the a swivel unit and having at least one second fluid line which extends from the at least one fluid line through the fitting outwardly to be connected with a hose or the like extending from the fluid source, so that when the fluid enters the a fitting unit it is fed to the one end of the post to operate the fluid-operated tool, and the a fitting unit are turnable around the axis of the post and tiltable around the axis of the a swivel unit.

Abstract: An amplifier in a telephone call station which is capable of indicating to a telephone call distribution system whether a microphone headset is in electrical communication with the telephone call station. The amplifier simulates being physically disconnected from the telephone call distribution system when the microphone is disconnected from the amplifier thus informing the telephone call distribution system to redirect telephone calls originally destined for that telephone call station.

Abstract: A microphone holder includes a housing comprising a base portion having a first aperture therein and sidewall portions disposed on the base to provide the housing with a microphone receiving cavity region. A cover, having a second aperture therein, is disposed over the cavity region of the housing and a baffle is disposed a predetermined distance over a first surface of the cover in the region of the second aperture.

Abstract: An interface assembly for providing an electrical and mechanical interface between a headset and a headset amplifier, includes a transmit signal path for receiving a signal from the headset microphone and for providing an output signal having electrical characteristics compatible with the headset amplifier. The interface assembly also includes a receive signal path for receiving a signal from the headset amplifier and for providing a signal having electrical characteristics compatible with the headset coupled thereto. Compatibility from headset to headset amplifier may be achieved by adjusting one or more characteristics including but not limited to the frequency response, input/output impedance matching, level adjustment and RFI suppression.

Abstract: A telephone headset including a boom microphone, a earphone, and an ear support constructed and arranged to be adjustable and comfortable for a wearer. The headset is configured with an adjustable ear support to fit a variety of ear sizes without affecting the balance of the ear support on the ear of the wearer. The ear support includes a rotational hinge which is biased into a given position by a compression washer. The earphone is removably and adjustably attached to a mounting ring which in turn is movably attached to the ear support by a spring biased ball and socket joint. The combination of flexible joints and removability of the earphone provides the degrees of freedom and stiction necessary to permit the earphone to be worn comfortably on either ear of the wearer.

Abstract: A microphone holder includes, a housing comprising a base portion having a first aperture therein and sidewall portions disposed on the base to provide the housing with a microphone receiving cavity region. A cover, having a second aperture therein, is disposed over the cavity region of the housing and a baffle is disposed a predetermined distance over a first surface of the cover in the region of the second aperture.

Abstract: A mechanical tensioner for a nut-bolt assembly has two input elements engaging with one another and engageable by an actuating tool so that the input elements are turnable relative to one another in opposite directions, one of the input elements being engageable with a bolt so that when the input elements are turned relative to one another the one engaging element pulls the bolt in an axial direction, an output element engageable with a nut so as to turn the nut, and a transmission connecting the other input element with the output element so that when the other input element is turned the output element turns through the transmission and thereby turns the nut. The transmission is formed so that the output element is turnable with a speed which is substantially greater than a speed of turning of the other input element.

Abstract: A fluid-operated tool for elongating a stud which has an axis and an end extending out over a nut, the tool comprises stud pulling unit adapted to engage the end of the stud so as to pull the stud, nut turning unit adapted to engage the nut so as to turn the nut, first fluid-operated unit acting on the stud pulling unit so that the stud pulling unit pull the end of the stud to elongate the stud, second fluid-operated unit acting on the nut turning unit so that the nut turning unit turns the nut, the first fluid-operated unit and the second fluid-operated unit communicating with a fluid source so that a pressure fluid supplied by the fluid source to the first fluid-operated unit and the second fluid-operated unit elongates the stud and turns the nut.

Abstract: A headset amplifier, adapted for use with a voltage source such as a battery, includes a time-out-timer circuit for deactivating the headset amplifier after a first predetermined period of time and for reactivating the amplifier in response to a signal fed to an input port of the time-out-timer circuit.

Abstract: For tightening or loosening a threaded connector which has a part to be turned with a plurality of engaging formations, a power tool is utilized in which at least two pawls engage the engaging formations and are displaced to turn the part which is to be turned, and at the same time the pawls are arranged so that a distance between the pawls is smaller than the distance between the engaging formations so as to reduce a power stroke of the drive of the power tool.

Abstract: A fluid operated tool for tightening and loosening an element has a unit for clamping an element to be tightened or loosened, a unit for turning the element clamped by the clamping unit, and a fluid operated drive unit formed to act on the clamping unit and on the turning unit so that under the action of the fluid operated drive unit the clamping unit clamp the element and then the turning unit turn the clamped element.