Abstract:
A rotation frictional welding method joins a tapered wedge (30) at one end (33) of a shaft (26) within a tapered aperture (32) in the plane of a disk (28). This method produces an overhung disk shaft assembly (24) with a shaft (26) having a tapered wedge (30) at one end (33) which is positioned in an welded within a tapered aperture (32) in a disk (28).
Abstract:
A combined bell alarm and lock-out accessory (20) is connected with the electronic trip unit (60) that controls a high ampere rated circuit breaker (10). The accessory (20) interacts with the circuit breaker operating mechanism (9) to activate the bell alarm upon circuit interruption and to prevent the closing of the circuit breaker contacts until the accessory (20) is manually reset.
Abstract:
A computerized tomography system includes a detector array (14) made up of a set of detector subelements (41-48) aligned along a slice thickness direction. A controllable switching matrix (60) selectively interconnects a predetermined number of successive detector subelements to a respective summing amplifier (80) to produce slice-constituent signals which measure a respective slice positioned to pass through a body. Each respective slice having a selectable thickness in a region of interest to be imaged.
Abstract:
This invention is an ultrasonic imaging system comprising a transducer array (11) comprised of a plurality of separately driven elements (12) which each produce a burst of vibratory energy when energized by a pulse produced by a transmitter (13). A display (17) receives a series of data samples produced by receiver (14) for all the scan lines and converts the data to a form producing one frame of a desired image. The system performs a scan in which beam forming time delay errors due to non-uniformity in sound speed within the transmission medium are corrected. Time delay errors are measured by cross-correlating the channel signal in each respective one of the receiver channels with a reference beam sum signal produced by summing all the receiver channel signals.
Abstract:
A method of simultaneous imaging (900) multiple components of velocity of moving materials within a subject employs magnetic resonance. Velocity encoding (955) is performed by computing differences of data obtained with modulated motion encoding magnetic field gradient pulses. Distributions of velocity are measured responsive to a motion sensitive phase encoding gradient (960) pulse.
Abstract:
A motion imaging method (700) uses magnetic resonance to detect velocity, and an acceleration distribution within moving materials in a subject. Velocity encoding (300-340) is performed by computing differences of data obtained with modulated motion encoding magnetic field gradient pulses. Distributions of acceleration (510-540) are measured responsive to a motion sensitive phase-encoding gradient pulse.
Abstract:
A shear rate imaging method uses magnetic resonance to detect the distribution of velocities within a subject. Distributions are measured responsive to at least two different field-of-views. Differences of the velocity distribution obtained with one field-of-view and the second field-of-view are computed to give a component of shear rate. The method can be used to obtain velocity measurements in any of three mutually orthogonal directions responsive to field-of-view shifts in as many as three mutually orthogonal directions to give a total of nine shear rate components. Data for each component can be acquired independently or data acquisition can be multiplexed to reduce data acquisition requirements.
Abstract:
"A low-gloss polycarbonate/ABS molding composition is made by adding 1-50 parts by weight of: D) a polyolefin compound whose functionality is sensitized by silane, to: A) 100 parts by weight (total) of: 1-90 parts by weight of a polycarbonate resin, B)90-1 parts by weight of ABS resin, and C) 90-1 parts by weight of SAN."
Abstract:
Disclosed is an improvement to the stability of D.C. motor brushes mounted in brush boxes with wings, is improved by angling the wings toward the commutator such that the brush spring contacts the brush at one or more points intermediate the ends of the brush. Improved cooling is provided by utilizing an end plate with apertures and a brush plate which, in combination with the commutator, provides a brush plate aperture for cooling air flow. In a preferred embodiment, speed variations of the motor can be achieved by selectively disconnecting one or more brushes in a four brush embodiment, reducing the torque and rotating speed of the motor. In a preferred embodiment, the use of a diode to interconnect same polarity brushes permits a speed change to be accomplished by selectively connecting one or the other end of the diode. In a further preferred embodiment, the stalling of the motor having power applied is indicated by an electronic output where voltage applied to one brush is filtered through an RC filter with the output amplified and voltage doubled. A ripple output indicating that the motor is rotating after amplification will light a light-emitting diode indicating proper operation of the motor.