Geometrical instruments
Patent
1979-08-30
1981-10-13
Desmond, Eugene F.
Geometrical instruments
310232, 339 5P, H01R 3908, H01R 3914
Patent
active
042945003
ABSTRACT:
A rotary electrical junction assembly includes a rotor and a stator separable into halves for installation and maintenance. Preferably, the rotor has brushes and the stator has split slip rings engaged by the brushes. The slip ring halves are interconnected with corresponding ring halves and are positioned on individual nonconductive backing members stacked together to form slip ring stacked halves mounted on the stator halves. The backing members are semicircular and each includes a circumferential insulator wall with opposite ends which overlap to provide concinuous insulation between adjacent slip rings. The brushes are mounted on brush racks having rollers to engage tracks on the stator. A split outer housing covers the rotor and stator and has recesses receiving the brush racks. The housing is clamped onto a rotary support member and the brush racks revolve about the stator upon rotation of the rotor support member, thereby providing continuous conductive contact between the brushes and slip rings. Alternatively, the stator may have brushes and the rotor may have split slip rings.
REFERENCES:
patent: 1797607 (1931-03-01), Despard et al.
patent: 2404969 (1946-07-01), Liddington
patent: 2453073 (1948-11-01), Jones
patent: 2509931 (1950-05-01), Krantz
patent: 2523081 (1950-09-01), Wendt
patent: 2820207 (1958-01-01), Roy et al.
patent: 3544949 (1970-12-01), Panajuk et al.
patent: 3619681 (1971-11-01), Ginkel et al.
patent: 3659627 (1972-05-01), Zimmerer et al.
patent: 4068909 (1978-01-01), Jacobson et al.
patent: 4098546 (1978-07-01), Swartz et al.
"Dependable Electrical Circuitry", Valmont Industries, Inc., Brochure, pp. 14, 15, (1977).
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