Electropneumatic valve

Claim 2

An electropneumatic valve, comprising a. a coil, b. an armature disposed at one end of said coil and movable towards said coil upon energization of said coil; c. first and second conduits extending concentrically along the axis of said coil, d. said first conduit extending beyond said second conduit and the end of said first conduit in position to be closed by said armature upon energization of said coil, e. means for delivering a flow of gas to said first conduit for discharge from the end thereof when said armature is open and thereby produce a negative pressure in said second conduit, f. energization of said coil causing said armature to close said first conduit and causing an increase in pressure in said second conduit.

Claim 3

A electropneumatic valve according to claim 1 including spring means urging said armature in a normally open position.

Claim 4

An electropneumatic valve according to claim 1 in combination with a pressure-responsive valve operatively connected to said second conduit.

Claim 5

An electropneumatic valve according to claim 1 including a relay operatively connected to said armature.

Claim 6

A control device comprising, a. a housing, b. an electromagnet coil within said housing, c. a coil core for said coil including a member disposed coaxially within the coil, d. said member having an internal passage opening at one end outwardly of one end of said member, e. a conduit disposed coaxially of said internal passage with at least a portion of said conduit disposed within said passage in radially spaced relation, f. the end of said conduit closer to said one end of said passage being spaced therefrom a distance equal to several times the diameter of the conduit, g. means providing a pressurized air inlet passage communicating with the space between said internal passage and conduit, h. the other end of said conduit communicating outwardly of said body, and i. an armature for said coil comprising a member extending across said one end of said internal passage, j. said armature being movable toward and away from said coil in response to energizing and deenergizing respectively of the coil, k. said armature having a portion cooperable with said one end of said internal passage to close the same when the armature is drawn toward the coil in response to energizing of the coil.

Claim 7

A control device comprising, a. a housing, b. an electromagnet coil within said housing, c. a coil core for said coil including a member disposed coaxially within the coil, d. said member having an internal passage opening at one end outwardly of one end of said member, e. a conduit disposed coaxially of said internal passage with at least a portion of said conduit disposed within said passage in radially spaced relation, f. the end of said conduit closer to said one end of said passage being spaced therefrom a distance equal to several times the diameter of the conduit, g. means providing a pressurized air inlet passage communicating with the space between said internal passage and conduit, h. the other end of said conduit communicating outwardly of said body, and i. an armature for said coil comprising a member extending across said one end of said internal passage, j. said armature being movable toward and away from said coil in response to energizing and deenergizing respectively of the coil, k. said armature having a portion cooperable with said one end of said internal passage to close the same when the armature is drawn toward the coil in response to energizing of the coil.

Claim 8

In a device as claimed in claim 5, said armature being sufficiently light that when pressurized air is introduced into said inlet passage and said coil is deenergized the armature will be supported in spaced relation to said body discharging from said one end of said internal passage, and a foraminate cover on said housing retaining said armature in the housing.

Claim 9

In a device as claimed in claim 5, said armature being sufficiently light that when pressurized air is introduced into said inlet passage and said coil is deenergized the armature will be supported in spaced relation to said body by the air discharging from said one end of said internal passage, and a forminating cover on said housing retaining said armature in the housing.