Communications – electrical: acoustic wave systems and devices – Echo systems – Distance or direction finding
Patent
1978-09-25
1980-01-29
Farley, Richard A.
Communications, electrical: acoustic wave systems and devices
Echo systems
Distance or direction finding
346139C, 346139A, G01S 760, G01D 1506
Patent
active
041863720
ABSTRACT:
An improved brush holder for use in a rectilinear recorder which utilizes a web of electrical recording paper, which passes across, and in contact with a plane metal back-up plate. A narrow belt loop is supported by a pair of spaced rollers and is driven in a direction transverse to the longitudinal motion of the recording strip or web. One linear portion of the loop of the belt is parallel to and spaced a small distance from the plane of the metal back-up plate. The belt is of insulating material and has attached to it an electrical contact means which is a metal plate fastened to the belt and transverse to the axis of the belt and is long enough to extend some distance on each side of the belt. An electrical contact plate is mounted in the plane of the back-up plate and spaced from it. The belt is positioned so that the two ends of the contact plate extend respectively over the back-up plate and the electrical contact plate. A wire contact brush is removably attached to the contact plate with the improved brush holder. The wire brush has two ends, one of which engages the paper, and the other engages the electrical contact plate, so that as the belt moves transverse to the paper, which is in contact with the back-up plate, the electrical potential on the electrical contact plate is transferred by the wire brush to the paper.
REFERENCES:
patent: 2633405 (1953-03-01), Nelson
patent: 3392404 (1968-07-01), Ross
Farley Richard A.
Lowrance Electronics, Inc.
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