US911457A - Ventilating-louver. - Google Patents

Description

A. W. STEWART. `VENTILA'IING LOUVER. Arrmonron FILED SEPT. 2a, 190s.

Patented Feb. ,2, 1909.

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ji/LW A. W. STEWART.

VENTILATING LoUvBR. APPLICATION FILED SEPT. 23,1908. 91 1,457. Patented Feb. 2, 1909.

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@fm-'Y @M/a arfzey ALEXANDER WILLIAM STEWART, OF GLASGOW,- SGOTLAND'.

VENTILATING-Loutnn. y

l Specification of Lettera Patent.

Patented Feb. a', 190e.

Application ld September 23, 1908. Serial No. 454,411.

To alt whom it may concern.'

Be it known that I, ALEXANDER WILIJIAM STEWART, a subject of the King of the United Kingdom of- Great Britain and Ireland, and resid-ing at Glasgow, Scotland, have invented a certain new and useful Improvement in Ventilating-Louvers, of which the following is a specification.

Tins invention relates to Ventilating louvers ofthe hit-and-miss type more especially of the kind in which a detlecting plate is used to deflect the air through lthe ventilator openings in its passage along the air supply trunk or the like.

The primary object of the present invention is to provide means whereby the deflecting plate is automatically controlledby the means for imparting movement to the vusual sliding plate of the louver either directly or through the intermediary of said sliding plate so that according to the degree of opening of the louver the deflector plate correspondingly varies the resistance to the passage of the air along the trunk.

In the accompanying drawings Figure 1 is an elevation, Fig. 2 is a transverse section and Fig. 3 is a horizontal section of a louver embodying the invention. Fig. 3a is a horizontal section showing the louver attached to the air supply trunk. Figs. 4, 5 and 6 are like views to Figs. l, 2 and 3 but show an alternative construction. U

In the preferred form shownin Figs. l to 3a, the louver which is attached to the air supply trunk A1 (Fig. 3a) has the defiecting plate A pivoted to it at one end on bracket arms B secured to the fixed frame of the louver, said fixed frame comprising two apertured` plates C, D, with an interposed frame d serving as a distance piece. To said defiecting plate A is attached a toothed quadrantor quadrants E adapted to gear with a toothed rack or racks F on the apertured sliding plate G of the louver which sliding plate G is mounted between the plates C, D, which form an airtight joint with the sliding plate. The arrangement is such that when the louver is closed the defiecting plate A is in horizontal position-and according to the degree of opening of the louver the defiecting plate A is raised correspondingly.

lIn lieu of the detlecting plate A being operated b means of toothed quadrant and rack gear ,.F, equivalent devices may be employed to produce the same result.

Any welll` known' devicel may be! 'employed to operate, and adjust the'l position of, the slidingplate of thelouver; but preferabl a cam His employed which cam is-adapted to work in conjunction witli a slot I inA the sliding plate G, and is mountedbetween the fixed plates C, D, which also provide bearings for the ends of the cam spindle 71,; or the cam vI-I may be fitted between a bridge piece and the plate D, said bridge piece being secured' to the plate D and accommodated .in a slot in the late' C. The outer end h1 of the cam s in lek' which may be fitted in any suitab e position is protected by a guard bearing J and is of square or like section for engagement with a portable box key by which means the cam H and likeair tlght joint with the faces of the sliding plate G. The said sliding plate G is operated in the manner described above; but in lieu Vof the deflecting plate A being actuated l by movement of the sliding 'plate G, said deflecting plate A is secured after the manner of a butterfly valve to the inner end of the spindle h which actuates the cam H or other device "for imparting movement to the sliding plate G -so that on movement of the said spindle It, which in this construction is ,fitted at one end of the louver, the deflecting plate A assumes a position corresponding to that of the sliding plate G and correspondingly varies the resistance to the passage of the air along the supply trunk.

I-Iaving now described my invention what I claim and desire to secure by Letters Patent of the United States is 1. A Ventilating louver,h comprising a stationary apertured member, a sliding apertured member guided by said stationary member, and a deflector movable with saidl sliding member.

2. A Ventilating louver comprising a stationary apertured member a sliding apertured member guided by said stationary member, a deflector, and means for moving said sliding member and said deiector simultaneously.

3. A ventilatin louvercomprising a stationary aperture member, a sliding apertured member guided by said stationary member, a deflector connected to said fixed member y and movable with said sliding member. .L

4. A ventilatin louver comprising a stationary aperture member, a sliding apertured member guided by said stationary 'membe'r a deflector, means operable to move said ing member, and devices for communicating movement from said sliding member to said deflector.

5. A Ventilating louver comprising a stationary apertured member, a sliding apertured member ided by said stationary member, turnab e cam devices operable to move said sliding member, and a delector movable with said sliding member.

6. A Ventilating louver comprising a staeinem tionary apertured member, a sliding apertured member guided by said stationary member, means operable to move said sliding member, a deector pivoted to said stationary member and rack and sector gearing for communicating movement of said sliding member to said deector.

7 A Ventilating louver comprising two stationary apertured plates, an apertured plate slidable between said stationary plates, cam devices operable to move said sliding plate, a deector pivoted to one of said stationary plates, and rack and Sector gearing for communicating movement of said sliding plate to said deflector.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

ALEXANDER WILLIAM STEWART.

Witnesses:

WALnAcE CRANSTON FAIRWEATHER, JOHN MCCLEARY.

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