US2138427A

US2138427A - Automatic ventilator

Info

Publication number: US2138427A
Application number: US171780A
Authority: US
Inventors: Claude D Payden
Original assignee: Individual
Current assignee: Individual
Priority date: 1937-10-29
Filing date: 1937-10-29
Publication date: 1938-11-29
Anticipated expiration: 1955-11-29

Description

Nov. 29, 1938. c. D. PAYDEN AUTOMATIC VENTILA'I'CSRI Filed Oct. 29, 1937 aazedefl gaen ATTO RN EYS I WITNESS Patented Nov. 29, 1938 UNITED STATES EATENT OFFiCE Application ()ctober 29,

2 Claims.

This invention relates to automatic ventilators and has for an object to provide a ventilator which will automatically control strong drafts through buildings to shut out rain which is fre- 5 quently driven through a ventilator by high wind.

A further object is to provide a ventilator in which the vanes are normally supported in an inclined position by a spring, the spring being connected at one end to a tie rod which is 10 pivotally connected to the vanes, and being connected at its other end to means through which the tension of the spring may be varied, wind pressure above normal against the vanes tending to close the vanes against the tension of the spring, the spring automatically returning the vanes to normal position as soon as abnormal pressure is relieved.

A further object is to provide a device of this character which will be formed of a few strong 20 simple and durable parts, which will be inexpensive to manufacture, and which will not easily get out of order.

With the above and other objects in view the invention consists of certain novel details of construction and combinations of parts hereinafter fully described and claimed, it being understood that various modifications may be resorted to within the scope of the appended claims without departing from the spirit or sacrificing any of the advantages of the invention.

In the accompanying drawing forming part of this specification,

Figure 1 is a longitudinal sectional view showing a ventilator constructed in accordance with the invention in position to control draft through an opening in a building.

Figure 2 is a longitudinal sectional view of the ventilator shown with the vanes closed by abnormally high wind pressure. 4

Figure 3 is a front elevation of the ventilator and frame thereof, a portion being broken away to expose the spring and its adjusting mecha nism.

Figure mechanism for tensioning the ventilator.

Referring now to the drawing in which like characters of reference designate similar parts in the various views, I0 designates a frame mounted in an opening in a building II, the frame as usual consisting of upper and lower transverse frame members and upright side frame members.

A plurality of slat vanesl2 are pivotally mounted off-center in the side frame members by pivot pins l3 and normally slope downwardly. A tie rod 14 is pivotally connected to the inner side at the top edge of each vane, preferably inter-engaging staples l forming the pivotal connection, although other pivotal connections may be employed.

4 is a detail sectional view showing the 4 the control spring of 1937, Serial No. 171,780

In the present embodiment of the invention a helical spring H5 is pivotally connected at the upper end to the lower end of the tie rod by inter-engaging eyes ll, or other connectors. The lower end of the spring is connected to a flexible cable l8 which is wound upon a shaft is which is rotatably engaged in a collar 20 carried by a resilient spider 2| which bears against a bracket arm 22 mounted upon the inner edge of the lower transverse member of the frame Ill. The shaft is equipped with a knob 23 by means of which the tension of the spring l6 may be adjusted.

Ordinarily the vanes I2 slope downwardly and permit gentle drafts to enter the building therebetween. However, in the case of abnormal winds, accompanied by rain, or not, the increased pressure tends to close the vanes as best shown in Figure 2, against the tension of the spring 16. Upon the abnormal pressure being relieved the tension of the spring l6 returns the vanes to a normal open position.

By rotating the knob 23 the cable I8 is wound upon the shaft 19 or unwound therefrom, to adjust the tension of the spring It so that the slats may be adjusted to any desired spacing therebetween when in normal open position as shown in Figure 1.

From the above description it is thought that the construction and operation of the invention will be fully understood without further explanation.

What is claimed is:

1. A ventilator comprising a frame, slat vanes pivotally connected at the ends to said frame, a tie rod pivotally connected to the vanes, a helical spring connected at one end to said rod, a flexible cable connected to the other end of said spring, and a shaft carried by the frame upon which the cable is wound to regulate the tension of the spring, vanes open against yielding to permit the vanes normal wind pressure.

2. A ventilator comprising upper, lower and upright frame members, a plurality of slats pivotally mounted off center in the upright mem bers, a tie rod pivotally connected to the inner side at the top edge of each ring, a helical spring pivotally connected at the upper end to the lower end of the tie rod, a flexible cable connected to the lower end of the spring, a shaft upon which the cable is wound, a collar through which the shaft is rotatably engaged and having an integral resilient spider, a bracket secured to the lower frame member against which the spider bears, and a knob on said shaft to wind or unwind the cable thereupon and regulate the tension of the spring.

gentle wind pressure and to close during ab- CLAUDE D. PAYDEN.

said spring normally holding saidv