Telescoping spring probe having separate wiper contact member

Details Telescoping spring probe having separate wiper contact member Telescoping spring probe having separate wiper contact member

1976-11-10

1977-09-27

Lake, Roy

Geometrical instruments

200 46, 324 725, H01R 1300

Patent

active

040507629

ABSTRACT:
A miniature low resistance telescoping spring probe includes telescoping tubular housing and inner plunger. Both the housing and plunger are elongated and of an electrically conductive material. The plunger has a probe head external to the housing. The inner wall of the housing and the outer wall of the plunger are engaged and concentric, providing a sliding electrical connection and a bearing therebetween. A coil compression spring urges the housing and plunger in longitudinally opposite directions. A separate low electrical resistance wiper spring member is affixed to the plunger. A substantially constant low resistance electrical connection is provided between the wiper spring member and the plunger. The wiper spring member has at least one longitudinally extending leg spring loaded outwardly into engagement with the inside wall of the housing. A bearing surface on the leg in engagement with the inside wall provides a substantially constant low resistance electrical connection between the wiper spring member and the inside wall during telescoping movement.

REFERENCES:
patent: 1651314 (1927-11-01), Beasley, Jr.
patent: 1831372 (1931-11-01), Spangler
patent: 2515004 (1950-07-01), Haupt
patent: 2773964 (1956-12-01), Majkrzak
patent: 2885648 (1959-05-01), King
patent: 3315163 (1967-04-01), Lutz
patent: 3412327 (1968-11-01), Murray
patent: 3435168 (1969-03-01), Cooney
patent: 3562643 (1971-02-01), Smith
patent: 3753103 (1973-08-01), Tetreault et al.
patent: 3812312 (1974-05-01), Anderson et al.
Everett/Charles, Inc. SPA-O "Snap-out" Spring Probe Nov. 1, 1974.

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