US1561006A - Ventilator - Google Patents

Description

M. M NUTT Nov. 10 1925.

VENTILATOR Filed March 3. 1923 U Tl S E S MAXWELL MGNTTTT, OF SAN FRANCISCO, CALIFGENIA.

VENTILATOR.

Application filed March 3, 1923. Serial No. 622,555.

To all whom it may concern:

Be it known that I, MAXWELL MCNUTT, a citizen of the United States, and resident of San Francisco, county of San Francisco, State of California, have invented a new and userul Improvement in Ventilators, of which the following is a specification.

My invention has for its object means for ventilating rooms, buildings, holds of ships or other closed spaces, cars, automobiles, fines, etc. Other objects will appear from the drawings and specifications which follow.

My ventilator is characterized by a converging member having an enlarged inlet and a converging throat outlet portion, the large end being directedto receive an in draft of air or the like, and within said member I mount a drafttube. This tube in passing through the wall of the converging member is bent towards the throat and has its outlet in line with the throat outlet and its inlet end opening into the space tobe ventilated.

When my ventilator is to be employed outdoors it is advantageous to mount it rotatably on bearings and about a vertical axis.

By referring to the accompanying drawings my invention will be made clear.

Fig. 1 is a cross section through my ventilator.

Fig. 2 is a rear end view of Fig. 1.

Throughout the figures similar numerals refer to identical parts.

A converging member is shown by the numeral 1 having an enlarged entrance portion at 2 and throat at 3 and an outlet from the said throat at 1. I prefer to make the cross section of this member circular as in this way it can be readily spun or built up from. metal. At 5 is shown a draft tube bent as at 6 within the member 1 and having its outlet at 7 in line with the outlet of the throat piece 4. The tube 5 may conveniently form a support for the structure and is preferably being mounted to rotate upon the ball bearing 8 carried on a stationary sup port 9 as on a building roof 10. The hearing is protected by the shield 11.

The vertical axis of the tube 5 is preferably nearer the end 2 than the throat end 4 and when the device is placed in an air current the vane 12 will cause the inlet 2 to face the indraft which indraft I have indicated by the arrows 13. The air flowing through the member 1 and especially the converging throat 3 is increased in velocity as indicated by the relative length of the arrows 14 compared with the arrows 13 and thereby estab lishes a partial vacuum at the outlet 7 of the tube 5. in the tube from the room or space 15 and as indicated by the dotted arrows 16. The said air flowing out of the tube 5 at its outlet 1 causes a strong outdraft from the space 15 and an'etlicient ventilation thereof. If the outlet- 7 is within the throat 3 the air flowing through the throat will expand over said outlet reducing the volume drawn through 5, whereas if the tube end 7 is beyond the "throat outlet the air flowing from the throat will expand away from the tube outlet and reduce the air volume drawn through 3.

For the best results therefore the outlet of the tube and the throat should be substantially in the same plane.

At 18 is shown a valve normally open, but adapted to throttle or close the opening at 17, should the draft become too great. The valve 18 is pivoted at 21 and partially counterbalanced by the weight 20 on the arm 19. While this valve is shown as controlling the opening 17 it may instead be mounted within the throat or at the outlet 7 in the latter case the pressure of the air at 14: may be caused to actuate a valve to close the outlet 7.

I claim:

1. A ventilator comprising a converging member having a discharge throat and adapted to receive air flow in its large end, a tube having its outlet flush with the outlet of the said throat, said tube passing through the wall of said member and hav ing an inlet adapted to receive air from a space to be ventilated.

2. A ventilator comprising a converging member having a discharge throat and adapted to receive air flow in its large end, a tube having its outlet flush with the outlet of the said throat, said tube passing through the wall of said member and having an inlet adapted to receive air from a space to be ventilated, said inlet portion having bearing means whereby the ventilator may be turned in a horizontal plane.

3. A ventilator comprising a converging member having a discharge throat and adapted to receive air flow in its large end, a tube having its outlet flush with the outlet This causes air to flow upward of the said throat, said tube passing through the wall of said member and having an inlet adapted to receive air from a space to be ventilated, said inlet portion having bearing means whereby the ventilator may be turned in a horizontal plane and a vane on said member to turn said member towards said air pressure.

4. A ventilator as set forth in claim 1 wherein said member is of circular cross section and wherein said inlet axis is forward of the horizontal center of said memher.

5. A ventilator as set'torth in claim 2 wherein said member is of circular cross section and wherein said inlet axis is torward of the horizontal center of said member.

6. A ventilator as set forth in claim 3 wherein said member is of circular cross section and wherein said inlet axis is forward of the horizontal center of said member.

7. A ventilator as set forth in claim 1 ,wherein the member and the outlet portion of the tube have a common axis.

8. A ventilator as set forth in claim 2 wherein the member and the outlet portion of the tube have a common axis.

9. A ventilator as set forth in claim 3 wherein the member and the outlet portion of the tube have a common axis.

10. A ventilator as set forth in claim 1 wherein said member is of circular cross section and wherein said inlet axis is torward of the horizontal center of said member and wherein the member and the outlet portion of the tube have a common axis.

11. A ventilator as set forth in claim 2 wherein said member is of circular cross section and wherein said inlet axis is forward of the horizontal center of said member and wherein the member and the outlet portion of the tube have a common axis.

12. A ventilator as set forth in claim 3 wherein said member is of circular cross section and wherein said inlet axis is forward oi the horizontal center of said mem her and wherein the member and the outlet portion of the tube have a common axis.

MAXWELL McNUTT.

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