US873125A - Ventilator. - Google Patents

Description

, W1 TNESSES //VVf/V70/?, l 1 By W i Q (L m No. 873,125. PATENTED DEC. 10, 1907.

W. HAMMANN.

VEN TILATOR.

APPLICATION FILED APR.20.1907.

' ments in ventilators of that an improved ventilator of this character which is so constructed that the ventilators in the claims at the end of the specification.

I or

' -which the ventilator is to be applied, this support the ventilator at a sufficient height -above the roof to permit a free circulation of and spaced at suitable distances around the Fig. 3,these braces being com osed of bar UNITED STATES Parana: OFFICE- WILLIAM HAMMANN, OF MILWAUKEE, WISCONSIN.

VENTILATOR.

No. 873,125. Specification of Letters Patent. Patented Dec. 10, 1907.

Application filed April 20, 1907- ,Serial No. 369,314-

To all whom it may concern:

Be it known that I, WILLIAM HAMMANN, a citizen of the United States, residing at Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented a new and useful Ventilator, of which the following is a specification.

The present invention relates to improvetype adapted to be arranged on the roof of halls, theaters, and other buildings, for permittingheate'd and foul air to escape and to insure a supply of fresh air, and it has for its object to provide may be made of very light sheet metal that are capable of retaining their shape, and, furthermore, it has for its object tov provide an improved damper or valve for controlling the passage of air through the ventilator.

To these and other ends, the invention consists in certain improvements and combinations and arrangements of parts, all as will be hereinafter more fully described, the novel features being pointed out particularly In the accompan ing drawings: Figure 1 is a central vertical section of a ventilator constructed in accordance with my present invention. Fig. -2 represents a horizontal section on the line 2-2 of Fig. 1. Fig. 3 is a perspective view of a brace constructed from sheet metal.

Corresponding parts in the several figures are indicated throughout by similar characters of reference.

.The ventilator shown in the present embodiment of the invention comprises a tube pipe 1 of suitable diameter and adapted to be mounted on the roof of the building to tube or pipe being of a length sufficient to air. To the upper end of the tube or pipe circumference are a series of rigid braces or reinforcements, such as shown 1n detail in iron or other suitable materia of suitable thickness and width to afford them the desired rigidity, these braces each embodying an inner attaching portion 3 which extends vertically and is riveted or otherwise secured to the upper end of the pipe, and opposite the attaching portion is a vertical pOIltiOn 4 to which is riveted, or otherwise secured, an annular wind shield 5 that is composed oftin or sheet iron of relatively light weight, the wind shield thus provided having vertically extending sides that are concentric with the axis of the central pipe 1. of the attaching portion 3 of each brace is formed a lower storm shield support 6.to

which is riveted, orotherwise secured, a-

conical storm shield 7 having itsv sides extending obliquely relatively to the sidesof the central supporting plate,-an intermediate connecting portion 8 of each brace extending between the outer edges of the wind. or storm shields 5 and 7, respectively, to retain At the rear end these parts firmly in their proper relative positions.

Extending outwardly from the upperpor i v tion of the attaching portion 3 of each brace is a connecting portion 9, the outer end of the latter being wardly and inwardly to form an upper storm shield support 10 to which shield 11 is riveted or otherwise secured, the latter being so located that its spaced below the roof or top 12. The latter is conical in shape andis composed of relatively light sheet iron or -tin, and it is supported in position by means of the connecting portions 13 and 14, the connectin por tion 13 extending in a direction inward y and upwardly from the upper end of the wind shield, and the connecting portion 14; extending upwardly from the upper edge of the upper storm shie d, the perip eral edge ofithe roof or top preferably. upper or smaller diameter of the upper storm shield to revent the entrance of rain to the central raft or, supporting pipe. These bracesv may be formed either integral or of a,

single piece of metal of endless form, although it is preferable to form them of a single piece for the reason that-it facilitates assembling of the ventilator. If so desired, the braces for securing the wind and storm shieldsand the top to the supporting tube may be made extended in a direction upz the conical storm upper edge is projecting beyond the;

up of sheet metal, a brace so constructed being shown in Fig. 3 of the drawings, and comprising a plate or body portion 30 adapted to extend radially of the ventilator when in position, the peripheral ed es of the plate bent at right angles to its s aces to form a set of attaching portions or flanges, the flange 31 serving as an attaching portion for the wind shield 5, the flange 32- for the attachment of the top, the flanges 33 and. 34'

serving as attachments for the upper and lower storm shields, and the flanges 35 providing means for securing the brace to the supporting pipe, the intermediate flanges 36, 37 and 38 serving to stiffen the brace at points intermediate those parts attached to the elements of the ventilator. structed as above described may be made very cheaply as it can be punched and stamped into form from sheet metal by the use of dies, requiring very little metal.

Surmounting the top or roof. is a cap 15 and beneath the cap and secured to the center of the roof or top is a guiding tube 16 which extends axially of the supporting or draft pipe and is held centered relatively thereto by means of a series of braces or stays 17 which are composed of bar iron having their outer ends secured to the inner side of the supporting pipe and are attached at their inner ends to the guiding tube, a suitable number of stays being spaced radially between the central guiding tube and the supporting pipe. Mounted to operate axially of the guiding tube is a damper or valve 18 which is composed, in the presentinstance, of upper and lower conical members 19 and 20, respectively, that are made of sheet metal of a suitable strength, the members being placed together with their concavities facing one another and are connected at their centers by means of a sleeve 21 which has a sliding fit on the guiding tube of the damper so that the damper or valve will operate vertically thereon. he outer edges of the conical members are secured in any suitable way, such as by riveting or folding, and the valve thus provided is adapted to cooperate with the upper end of the draft or supporting pipe to control the flow of air therethrough, and in order to insure a close fitting of the damper, the upper edge of the draft pipe is provided with a felt seat 22 on which the damper rests when in closed position, this felt seat in the present instance being formed of a strip having its longitudinal edges folded on the inner and outer sides of the draft pipe.

In order to facilitate the operation of the damper it is counterbalanced by a weight 23 which is guided to operate vertically within the guiding tube, a cord or chain 24 having an intermediate portion passing through an eye or pulley 25 on the weight, and having its ends attached to the damper at points on opposite sides of the guiding tube, and in order to effect an automatic closing of the damper in case of fire, fusible l ks 26 and 27 are interposed between the en s of the connecting cord and the damper to permit closing of the latter when the temperature Within the ventilator exceeds a given limit.

The device may be so constructed that the counterweight is heavier than the damper,

A brace con weight causing a closing movement of the damper and a downward movement of the counterweight causing an opening movement of the damper. In order to minimize friction, theen'd' of the balancing cords pass over relatively fixed pulleys 29 and 30 mounted within the cap 15, the latter serving to close the guiding tube and protect the pulleys and other operating parts.

,A ventilator embodying my present invention may be constructed of ve thin or light sheet metal for the reason that the weight and strains to which the parts are subjected is sustained by the reinforcing braces, the sheet metal serving mainly for the purposes of breaking the direct course of the wind striking the ventilator from the outside and to revent entrance of rain, and the like, and tl fe improved form of damper not only centralizes the construction of the device, but it improves the circulation of air, for the reason that when it is in open position, it fills the s ace formed in the center of-the top cone an the lower conical surface of the damper serves as an angular deflector for directing the air passing outwardly through the spaces at the top and bottom of the upper storm shield, so that very little suction is required to effect the discharge of the air.

What is claimed is 1. In a ventilator, the combination with a draft pipe, and a roof supported above the upper open end thereof, of a tube centered axially of the draft pipe, a valve arranged to cooperate with the draft pipe and having a sleeve guided to operate longitudinally of the said tube, a counterweight mounted to operate vertically within the said tube, and operative connections between the counterweight and the valve whereby the former balances the latter.

2. In a ventilator, the combination with a supporting or draft pipe, and a top spaced above the upper end thereof and forming an exit for the airascending the pipe, of a guiding tube arranged axially of the pipe, a damper guided to operate on said tube and to co operate with the upper end of the draft pipe to control the flow of air there throug a counterweight guided to operate longitudinally within the tube, and operative connections between the counterweight and damp 3. In a ventilator, the combination with a supporting or draft pipe, and a top mounted above the upper end thereof and forming an in which case a cord can be attached to the x jxit for air ascending the pipe, of a guiding tube arranged axially of the pipe, a damper guided to operate longitudinally of the tube and adapted to cooperate with the upper end of the pipe, a counterweight mounted to operate vertically within the guiding tube, a

flexible cord having its ends attached tothe damper, and loosely enga ing the Weight at an intermediate point an pulleys mounted in the top for guiding the cord.

4. In a ventilator, the combination with a supporting or draft pipe, and atop spaced above the upper end thereof, of a guiding device arranged between the top and the supporting pipe, a damper mounted to operate vertically of said guiding device and adapted to cooperate with the upper end of the pipe to control the passage of air therethrough, a counterweight for normally supporting the weight of the damper, flexible connections attached to the counterweight and extending to the underside of the damper,- and fusible links secured to the underside of the damper and attached to the flexible connections for-relieving the supporting action of the weight.

5. In a ventilator, the combination with a supporting or draft pipe, and a conical top spaced above the upper end thereof, of a guiding tube connected at its upper end to the top and having stays operatively con necting its lower end to the pipe, a damper mounted to operate longitudinally of the guiding tube and adapted to cooperate with the upper end of the pipe, embodying a pair of conical sheet metal members placed together with their concavities facing one another, and a central sleeve connecting the conical members, a counterweight mounted to operate longitudinally of the guiding tube, flexible connections attached to the counterweight, an operating device connected to the counterweight and extending through the lower end of the guidin tube, and fusible links arranged at the unc ierside of the damper and connecting the latter to the flexible connections. r

In testimony that I claim the foregoing as my own, I have hereto aflixed my signature in the presence of two witnesses.

WILLIAM HAMMANN. Witnesses:

CHAS. FRIEDRICH, FRED A. TEALL.

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