Apparatus for inducing air flow

Claim 2

Apparatus for inducing air flow comprising an elongated narrow member defining an elongated narrow passage which is open at one longitudinal end, a fluid outlet nozzle mounted in the member near the open end and arranged to direct a jet of fluid along the passage toward the open end, and air-inlet means comprising a long, narrow, lateral opening extending longitudinally along a substantial portion of the member for inducing air flow into the member through all of the long narrow opening.

Claim 3

Apparatus as claimed in claim 1, in which the air-inlet means comprises a slot formed in the wall of the member and extending longitudinally along the member from a position spaced slightly from the open end to a position near the opposite end.

Claim 4

Apparatus for inducing air flow comprising an elongated member defining an elongated passage which is open at one longitudinal end, a fluid outlet nozzle arranged to direct a jet of fluid along the passage toward the open end, and air-inlet means comprising a long, narrow, lateral opening extending longitudinally along a substantial portion of the member, in which the air-inlet means comprises a slot formed in the wall of the member and extending longitudinally along the member from a position spaced slightly from the open end to a position near the opposite end, and in which the slot is generally wedge shaped, being tapered inwardly toward the open end of the passage.

Claim 5

Apparatus for inducing air flow comprising an elongated member defining an elongated passage which is open at one longitudinal end, a fluid outlet nozzle arranged to direct a jet of fluid along the passage toward the open end, and air-inlet means comprising a long, narrow, lateral opening extending longitudinally along a substantial portion of the member, in which the air-inlet means comprises a slot formed in the wall of the member and extending longitudinally along the member from a position spaced slightly from the open end to a position near the opposite end, and in which the slot is generally wedge shaped, being tapered inwardly toward the open end of the passage.

Claim 6

Apparatus as claimed in claim 3, in which the cross-sectional area of the passage reduces in a direction away from the open end of the passage.

Claim 7

Apparatus as claimed in claim 1 wherein the member is positioned laterally on a side of a support and wherein the air-inlet means is in a wall of the member opposite the support whereby ambient air and particulate material are drawn into the inlet-means laterally of the support over a substantial portion of the member for preventing dust from falling along the side of the support.

Claim 8

Apparatus as claimed in claim 1 wherein the elongated member is a tube tapered inwardly toward the end opposite the open end.

Claim 9

Apparatus for inducing air flow comprising an elongated member defining an elogated passage which is open at one longitudinal end, a fluid outlet nozzle arranged to direct a jet of fluid along the passage toward the open end, and air-inlet means comprising a long, narrow, lateral opening extending longitudinally along a substantial portion of the member wherein the elongated member is a tube tapered inwardly toward the end opposite the open end, and wherein the tube has a generally cylindrical wall and wherein a bottom portion of the tube has been removed and has been replaced by a flat plate joined with the tube wall at a slight angle to an axis of the tube.

Claim 10

Apparatus for inducing air flow comprising an elongated member defining an elogated passage which is open at one longitudinal end, a fluid outlet nozzle arranged to direct a jet of fluid along the passage toward the open end, and air-inlet means comprising a long, narrow, lateral opening extending longitudinally along a substantial portion of the member wherein the elongated member is a tube tapered inwardly toward the end opposite the open end, and wherein the tube has a generally cylindrical wall and wherein a bottom portion of the tube has been removed and has been replaced by a flat plate joined with the tube wall at a slight angle to an axis of the tube.

Claim 11

Apparatus as claimed in claim 1 wherein an end of the elongated member opposite the open end is closed by a hinged cover.

Claim 12

Apparatus for inducing air flow comprising a member defining an elongated passage which is open at one end and closed at the other end, a fluid outlet nozzle arranged to direct a jet of fluid along the passage towards the open end, and air-inlet means defining a slot extending longitudinally along a substantial portion of the member, a cross-sectional area of the passage reducing along a substantial portion of its length in a direction away from the open end of the passage.

Claim 13

Apparatus for inducing air flow comprising a member defining an elongated passage which is open at one end and closed at the other end, a fluid outlet nozzle arranged to direct a jet of fluid along the passage towards the open end, and air-inlet means defining a slot extending longitudinally along a substantial portion of the member, a cross-sectional area of the passage reducing along a substantial portion of its length in a direction away from the open end of the passage.

Claim 14

Apparatus for inducing air flow comprising a member defining an elongated passage which is open at one end and closed at the other end, a fluid outlet nozzle arranged to direct a jet of fluid along the passage toward the open end, and air-inlet means defining a wedge-shaped slot tapering inwardly toward the open end of the passage and eXtending longitudinally along a substantial portion of the member, a cross-sectional area of the passage reducing along a substantial portion of its length in a direction away from the open end of the passage.

Claim 15

Apparatus for inducing air flow comprising a member defining an elongated passage which is open at one end and closed at the other end, a fluid outlet nozzle arranged to direct a jet of fluid along the passage toward the open end, and air-inlet means defining a wedge-shaped slot tapering inwardly toward the open end of the passage and eXtending longitudinally along a substantial portion of the member, a cross-sectional area of the passage reducing along a substantial portion of its length in a direction away from the open end of the passage.