Sealing arrangement for encapsulated length or angle measuring s

Details Sealing arrangement for encapsulated length or angle measuring s Sealing arrangement for encapsulated length or angle measuring s

1984-10-31

1986-09-02

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

277135, 277DIG7, H01J 314, B65D 5300

Patent

active

046098194

ABSTRACT:
An encapsulated length or angle measuring system includes a follower or a coupling member which extends through a slit in a housing of the measuring system. Thus slit is sealed off against harmful environmental influences by sealing elements which extend along the slit and are spread open by the coupling member in the region where the coupling member passes out of the housing through the slit. This spreading of the sealing elements can result in sealing problems. In order to provide better sealing, the sealing elements are formed as thin, resilient metal sheets which define chambers on their active sealing surfaces which contain a sealing fluid. This sealing fluid, by means of adhesion and capillary action on the follower or coupling member, seals off the extremely fine gaps which are typically present between the follower or coupling member and the sealing lips.

REFERENCES:
patent: 3331608 (1967-07-01), Charrault et al.
patent: 4136958 (1979-01-01), Nelle
patent: 4564294 (1986-01-01), Ernst

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