Multimodal pressure switch

Details Multimodal pressure switch Multimodal pressure switch

1983-03-11

1985-01-15

Scott, J. R.

Electricity: circuit makers and breakers

Fluid pressure

Flow-responsive type

200 814, 200 83R, 200 83S, 200153T, H01H 3524, H01H 332

Patent

active

044939574

ABSTRACT:
The conical tip of a load applying member (42) acts against one side (136) of a movable plate (120). A spring (84) urges the conical tip of a biasing member (88) against the other side (138). In response to a relatively small movement of member (42) against plate (120), plate (120) pivots about a first axis a.sub.1 to depress the operator (102) of a first snap-action switch (98). In response to a relatively large movement of member (42), plate (120) pivots away from contact with operator (102), first about auxiliary axis a.sub.4 and then about third axis a.sub.3. In response to an intermediate movement, plate (120) pivots to depress the operator (103) of a second snap-action switch (99), first about second axis a.sub.2 and then about auxiliary axis a.sub.4. Axis a.sub.4 is defined by first and second fulcrums (71, 134). Axis a.sub.2 is defined by second fulcrum (134 ) and operator (102); axis a.sub.3 is defined by first fulcrum (71) and operator (103). Axis a.sub.1 is defined by the line along which edge (A) of plate (120) contacts insert (22) from which the tip of member (42) projects. A single variable pressure signal causes each such movement of member (42).

REFERENCES:
patent: 3210486 (1965-10-01), Holzer
patent: 3898405 (1975-08-01), Weber
patent: 3946174 (1976-03-01), Herbst
patent: 4048455 (1977-09-01), Forsythe et al.

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