US1383469A - Ventilator - Google Patents

Description

F. C. LARGEN.

vENTlLAToR.

APPLICATION FILED FEB. 7, 1920.

Patented July 5, 1921.

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5 @M mm3. maw@ F. C. LARGEN.

VENTILATOH.

APPLcAnoN FILED rs.7,192o. 1,388,469. Patented July 5,1921.

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Z5' za 12 57 724 wma/tp UNITED sTATEs PATENT OFFICE.

FRED C. LARG-EN, 0F CREIG-HTON, NEBRASKA.

Be it known that I FRED C. LARGEN, a citizen of the United States, and a resident of Creighton, in the county of Knox and State of Nebraska, have invented new and useful Improvements in Ventilators, of which the' following is a specification.

This invention relates to ventilators and refers more particularly to means for ventilating auditoriums, theaters, and the like places where large numbers of peoplemay1 be congregated.-

The primary object of this invention is the provision of means for securing a more efficient and thorough change of air` in places in which a large number of people are congregated.

A further object of the invention is the provision of means for automatically directing an air current in any one of several elevations, as desired.

A still further object of the invention is to provide a Ventilating system for auditoriums and the like which is associated with means controlled by the .blower of the ventilator for introducing an air current in any. one of several elevations.

A still further object of this invention is to provide a Ventilating device whereby upon variations in speed of the blower the dlrection of air current lis synchronously varied.

`A still further object of the invention is to provide means associated and connected with a blower of the ventilator constituting a noise eliminating element. Other objects and advanta s ofthe invention will be apparent during4 the course of the following description taken in connection with the accompanying drawings.

In the drawings, forming a part of this specification andwherein like numerals are employed to designate like parts throughout the same,

.Figure 1 is a side elevation' of the device in operation,

v Fig. 2 is a cross device, l Fig. 3 is a cross sectional viewof the device taken on line 3-'3 of Fi 2, l

- Figi 4 is a top plan view o a portion of the device showing the sociated therewith, and,

sectional view of the governing means as-A Patented July 5, 1921.

Y vnir'rrriacroizh 1,383,469, Specification of Letters Patent.

Application .filed February 7, 1920. Serial No. 356,874. To all lwhom 2f/may camera:

Fig. 5 is a view partly in section of the shutter control means.

In the drawings, wherein for the purpose of illustration is shown a preferred form' of my invention, the numeral 1 designates the blower or fan casing which is formed of sheet metal, wood or any suitable material. This casing 1 is provided in each side thereof with relatively large oppositely disposed openlngs 2 for the admission of air to the interior of the casing. The casing 1 is provided with an open end or air outlet 1 to be hereinafter described. The casing is supported by upstanding support members 3 secured to a'base 4 of suitable constructie on which is also mounted a motor 5. l

A revoluble blower fan 6 is mounted within casing 1, the driving shaft 7 of which is supported by journals 8 secured to cross bars 9whichfextend across and are secured to'uprights 3. As shown clearly in Fig. 3 the driving shaft 7 extends beyond the cas ing l and has mounted thereon at one end,

a driving wheel 10 which is rotated by means of an endless belt 1 1 connected to the` motor 5. Secured to the opposite end of shaft 7 is a governor l2 of ordinary construction. The shaft 7 is provided exteriorly of the case 1 with collars 13 and 14 for the purpose of limiting the lateral movement of governor l2.

The fan or blower is of peculiar construction and as shown in Fig. 3 comprisestw oppositely disposed substantially circular sides 15 eachv provided with a relativel large opening 15 -which coincides in size wit the openings 2 above mentioned and are disposed adjacent thereto. The sides 15 are connected by a plurality of blades 16 formed. preferably of wood, sheet metal or other suitable material. As shown in Fig. 2 the iplates 16.,are tapered in thickness, having the narrower' edge toward the center and. the thicker edge near the'k circumference of the blower, that is, the plates taper toward thencenter of the blower. These plates are secured against displacement by bolts or screws v'(not' shown) or by cleats 17 secured to the' sides of the blower between which the plates are mounted. The blower is supported withinthe casing 1 by means of cross bars'18 secured to the sides of the'blower Y and at approximately right-angles with each ing the shutters 24, is provided with an armother, to which is secured a collar 19 which is also secured to driving shaft 7. Secured around opening 41 of the casing by any suitable means such as a band 20` is a flexible air tube 21 formed of canvas,heavy cloth, or the like. The forward end of the iexible air tube 2l is secured' to a cylindrical nozzle 22 by means of a band or other suitable securing means 23.. The cylindrical nozzle 22 has communication with the air in the 27 which is 'secured to the above mentioned rod 25. v

As shown in Fig. 4, one of the shutter supporting shafts 26 is extended for a short distance and has mounted thereon a depending lever arm 30. 'Secured to cross bar 9 is a bracket 28 on which is pivotally mounted an angle arm 29. One portion of angle arm 29 is bifurcated at its end and is positioned around shaft 7 as shown at 31, the other eX- tremity of varm 29 being connected to lever arm 30 -by means of connecting rod 32.

As shown inl Fig. 2 the shutters 24 lie with avery slight upward inclination when the blower fan is not in operation the various elements associated therewith being so connected. As shownin Fig. 1 the entlre device is positioned' exteriorly of theauditorium proper, being positioned in a compartment having aroof 33 and the sides34, one of which is rovided with a plurality of shutf' the admission of air to the compartment It is obvious, however, that the entire device maybe arranged entirely sepa-l ratev from the auditorium or theater or at some 'distance therefrom according to the length of flexible air tube 21.

into the vauditorium or,` the' theater.-

' ,It is believed that the construction'of the device will be readily understood from theA accompanying-drawings as above describedv and the primary object is to have the parts so positioned that upon an mcrease of speed of the fan or blower there .will be a correspending increase in elevation ofthe shutters 24thereby allowinga'correspondin in'-l crease in elevation ofthe air current blown t is well known that in present .day systems of f ventilation the air current is usually blown .at one elevation, no matterwhat the speed ofl the blower. This is injurious as well alsvery uncomfortable to the assemblage of,- people `in the auditorium, My deviceJ eliminates this inconvenience byproviding a synchronous elevation of the air current-with `the increase of `speed ofthe blower. It is to be understood that the form of m invention herewith shown and described is to be taken as a preferred example of the same, andv that various changes in the shape, size and arrangement o f parts may be resorted to without departing from the spirit of the invention or the scope of the Subj oined claims. v

Having thus described my invention, what I claim as new and desire to secure and rotect byvLetters Patent of the United tates is:

1. A ventilator for auditoriums and the like comprising a casing, a fan rotatably mounted within the casing, means for rotating said fan, an air conduit connected to the casing, a plurality of shutters mounted lin said conduit, and means connected to the fan and to the'shutters for obtaining changes in position' of the shutters upon variations in -the speed of rotation of the fan to deflect air at different-elevations with respect to the conduit. y

2. A. ventilator for auditoriums and the like comprising a casing, a rotatablel fan mounted within the casing, a flexible air conduit secured to and communicating with the casing and having an outlet, a plurality of shutters secured within said air conduit, and means connected to the fan and the shutters for obtaining changes in position of the shutters upon variations in speed of the fan to deiect air passing from the conduit at an langle with respect to its outlet.

3. The combination with a casing and a blower mounted therein, of a`plurality of pivoted shutters in theA casing movable parallel to each other, and mechanism operated by the blower to move the shutters to an angular position with respect to the longitudinal axis of the casing to deflect the air A at an angle with respect to the longitudinal axis ofthe casing upon air forced from the casing above a predetermined velocity.

' 4.. In vcombination with a ventilator for .auditoriumsand the like comprising a casing, a rotatableB fansecured within the caslng, an air conduit secured to and communil eating with the casing 'and a plurality of shutters-'secured within said air conduit, means secured-to the fan and to the shutters for obtaining a synchronous elevation of the air currentexpelled from the air conduit upon an increase of speed of the fan.

- 5. A-Aventilator for auditoriums and. the likel comprising a casing, a fan'provided with a pluralityof blades rotatably mounted l 'and communicating with the auditorium to be ventilated, a plurality of shutters securedA Within said nozzle, and means the shutters and coperating connected to with the fan for obtaining synchronous changes in position of said shutters upon variations in speed 5 of rotation of the fan to deflect the air expelled from the nozzle at an angle thereto.

6'. The combination with a casing having an outlet and a rotatable blower mounted therein, of a plurality of shutters pivoted in the casing to swing about horizontal axes and operatively connected together, and mechanism for tilting the shutters upon change of speed of the blower whereby to deflect the air from the casing at different elevations.

FRED C. LARGEN.

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