US909601A - Ventilator. - Google Patents

Description

R. F. HUNTER.

VBNTILATOR.

APPLICATION FILED APB.13,1908.

909,601 Patented Jan. 12, 1909.

WITNESS/5 ENTOH Q Eur/Earl? H UN TEE 0 i" QFW B UNITED sT'ATEs Arnnir Specification of intent.

Tatented $9.11.. 12, 19.09.

Application-med e it .13, 1908. s arch. 496,809.

To all-'whom-itmay concern-z Be it' known that 1, ROBERT F. Hnnrnma citizen of the United States, and a' resident of Bellefonte, in the county of Center and State of Pennsylvania, have-made certain new and useful-Improvements in Ventilators, of which the following is a specification.

My invention is an improvement 'in ventilators, and consists in certain novel constructions and combinations of parts hereinafter described and claimed.

' Referring to the drawings forming a part hereofigure l is a section on the line 1- 1 of Fig. 2, and Fig. 2 is a section on the line 2--2 of Fig. 1. The present embodiment of the invention,

comprises a casing or box 1, substantially' rectangular in cross section, open at its top 'asat 2, and provided with a side opening 3., the casing being provided with a lateral extension 4 at the side opening, which extension is adapted to be inserted in a window casementjbetween the sash and the sill, the casing being arranged inside of the room to be ventilated, and the top and the bottom of the extension are each provided with a felt .cushion 5, for engagement by the sash and the sill. A shield 6 is provided at the top of the lateral extension, and'screens 7 and 8 are arranged at the top and the side opening respectively.

A damper 9 is provided with trunnions 10, which are journaled in the sides of the casing, the damper being of a width equal to the width of the casing, and of a length to extend thereacross when in closed position, as shown in dotted lines in Fig. 1. The upper and the lower ends of the damper are bent at an angle to the'body portion thereof as at 11, whereby to flatly engage the-sides of the casing, and cushions of felt 12 are pro- Vilied for engagement by the said bent ends.

The trunnions 10 are arranged above the center of the damper, so that the said damper normally stands in the position shown in full lines in Fig. 1, and means are provided for varying the angle of inclination of the damper, whereby to close the opening of the casing to a greater or less extent.

The above mentioned means comprises a rod 13, having its ends inserted in horizon tal slots 14 in the sides of the casing, and the said rod is adapted to be moved nearer to or farther away from the window casement, whereby to cause the damper to stand in a more or less inclined position, thereby varying the extent of the clear passage through the casing. I The purpose ofthe invention, is to furnish a-self regulating ventilator, one which will admit an ordinary current of air, but will prevent the entrance of strong currents. An ordinary current of air passing in the direction of the arrows shown in Fig. 1, will have no eflect on the damper, but should a stronger current take place, the damper will be swung into one of the positions shown in dotted lines, depending upon the strength of the said current, a s'trong current completely closing the damper. By arranging the weight of the damper in accordance with the end to be attained, the ventilatormay be constructed to close at ,a predetermined strength of current; The amount of dust passing with the air will be diminished, for the reason that dust is usually carried in high winds, and high winds willv close the ventilator, while. a

wind above normal velocity will so deflect I the damper as to throw the particles of dust downward. The screens also act to diminish the dust.

By the use of the operating'rod 13, the

maximum opening of the damper may be determined, without in any way interfering with the automatic principle of the damper, and the rod is also used to retain the damper in closed position. It will be observed that only the lower portion of, the damper, that is, that portion below the trunnions is exposed to the direct current of the air as itenters from the outside, and enough force is exerted by such direct current to overcome any counteracting effect of the currents in front of and below the damper. The more the damper'is deflected by an increase in velocity of said air current, the more said current is deflected inward toward the windowpane, thus further insuring the drafts from extending away from the window. It will be understood that the damper is held closed,

so long as suflicient velocity and wind prcssure is present, but gradually takes the open positionas the pressure decreases, thus preventing admission of dust and maintaining an even volume of air. It will be noticed that the trunnions are provided with shoal ders 10, to prevent the side edges of the damper from rubbing the sides of the casing.

I claim 1. A. ventilator comprising a casing open at its top and having a side opening, the

casing being provider] with a lateral extension at the side opening adapted to be inserted in a window casement between the sash and the sill, the top and the bottom of the extension having cushions of felt for engagement by the sash and the sill, a damper comprising a plate of sheet material provided with trunnions engaging the sides of the casing, the trunnions being arranged nearer to the top of theplate than to the bottom, the ends of the plate being bent at an angle to the plate whereby to engage the sides of the casing with a flat surface when the damper is rocked into closed position, the casing being provided with felt cushions for engagement by the said bent ends, and with slots in its sides above the trunnions, and a rod having its ends inserted in the slots and against which the upper end of the damper rests: i

2. A ventilator comprising a casing open at itstop and having a side opening, the casing being provided with a lateral extension at the side opening adapted to be inserted in a window casement between the sash and the sill, the top and the bottom of the'extension having cushions of felt for engagement by the sash and the sill, adamper comprising a plate of sheet materiahprovided with trunnions engaging the sides of the casing, the trnnnions being arranged nearer, to the top of the plate than to the bottom, the ends of the plate being bent at an angle to the plate whereby toengage the sides of the casing with a fiat surface when the damper is at its top and having a side opening, the

casing being provided with a lateral exteiision at the side opening adapted to be instarted in a WlIldOW casement between the sash and the sill, a damper for closing the casing comprising a plate provided with trunnions engaging the sides of the casing,

the trunnions being nearer the top than the bottom of the casing and means for varying the inclination of the plate.

4. A ventilator comprising a casing and a damper for closing the casing comprising a plate provided with trunnions engaging the sides of the casing, the trunnions being nearer the top than the bottom of the casing, and means for varying the inclination of the plate. 4

5. A ventilator comprising a casing open at its top and having a side opening, a damper pivoted in the casing on an eccentric axis for closing the passage therethrough,

said damper being adapted to be closed by the pressure of the air current, andrnieans for adjusting the extent of opening of the damper.

ROBERT FRANKLIN HUNTER.

Witnesses:

HARRY KELLER, E. E. DAVIS.

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