US1028221A - Ventilator. - Google Patents

Description

J. KEITH.

VENTILATOR.

APPLIGATIONI'ILED APR.25, 1911.

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J. KEITH.

VENTILATOR.

APPLICATION FILED APILZS, 1911.

1,028,221 Patented June 4, 1912.

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J. KEITH.

VENTILATOR.

APPLICATION FILED APR.25, 1911.

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I a n wflffozucx 39V Uwuud JAMES KEITH, or LONDON, ENGLAND.

VENTILA'I'OR.

Specification of Letters Patent.

Patented June 41 1912.

Application filed. April 25, 1911. Serial No. 623,274,

To all whom it may concern: n

Be it known that I, JAMEs KEITH, a subject of the King of Great Britain, residing at London, England, have invented a new and useful Improvement in Ventilators; and I do hereby declare the following to be a full, clear, and exact description of the same.

"feeling of draft To accomplish this object I have provided a ventilator adapted for suitable connection with the outside. air and having a casing inclosing a suitable fan, practically the whole of the circumference of the casing being formed of wire gauze throughwhich the air is-forced into the 'room and so difiused and delivered through the comparatively large area of gauze, thatno perceptible draft is felt, al-

though the feeling of freshness will be prescut all the time and any- 'stufiiness in the room or apartment will be prevented and good ventilation assured: I also provide means whereby the cold outside air may be diluted with air taken from the room, the mixture thus obtained being passed through the fan and gauze as just described. l he inlet connection for the admission of the outside air may be through a suitable conduit adapted to ,be placed through a window frame or" through a screen placed inthe lower part ofthe window. Or this connection may be through a conduit placed in the top of a hollow column placed 1n the room and communicating with the outside air.

I also provide means for filtering, purifying, disinfecting or perfuming the air passing through the ventilator. This means may consists of an outside envelop of muslin or other open fabric or other flexible cover which may be secured around the apparatus and kept inflated by the air pressure from within.

When desired the space between the gauze and the covering may be filled with cotton wool or other substance.

The covering would be used with or withunder the sash 14 is shown in Fig. 1.

out the filling; and the covering when used alone, or both the covering and the filling could be used dry or could be moistened with disinfectants, perfume, medicinal or other liquid.

Ventilators, showing by way of example possible embodiments of this invention, are illustrated in the. accompanying drawings, in which, i

2 Figure 1 is an end elevation showing a ventilator applied on the inside of a window, Fig. 2 is a longitudinal vertical sectional view of the same. Fig. 3 is a vertical sectional view taken on the line 3-3 of Fig. 2. Fig. 4 shows a horizontal section taken on the line 1 l of Fig. 2. Fig. 5 is an elevation of another form of ventilatorand placed on' the top of a column. Fig. 6 is a vertical sectional view of the same. Fig. 7 is a transverse sectional view. Fig. 8 1s a horizontal sectional View of the same. Fig. 9 is a longitudinal sectional view showing the filtering or disinfecting means applied to the first form of the invention. Fig. 10 is a transverse ,vertical sectional view of the same, and Fig. 11 is a side elevation showing the filtering and disinfecting means applied to the second form of the invention.

Referring more particularly to Figs. 1 to 4, the ventilator is shown provided with a casing 10 the main body of which may be constructed of stamped sheet stcel, light cast iron or any other suitable material. The lower part of the casing is provided with an outer inlet-conduit 11 and an inner inlet conduit 12, the outer conduit being adapted for placing through the window frame or through a screen l3'in the window The inner conduit 11 is provided with a flap door 15 which may be adjusted for any width of opening.

The ends of the casing are approximately circular in shape and are provided with flanges 16 to which are attached the edges .of the wire gauze 17, said edge being held in place by rings or bands 18 secured to said flanges by counter sunk screws or in any other manner.

The inner end wall 19 may be concaved, and has mounted centrally thereon, an electric motor 20, the armature shaft of which passes through said wall and has mounted thereon the fan 21. It is understood, however, that other motive power may be used.

This fan may be of a form similar to that 1 of my applications Serial Numbers 588314. and 602885 for Letters Patent in the United States, or it may be any other suitable open fan. As illustrated, the blades 22 of the fan are somewhat curved and inclined from the radial direction, and are secured to the disk 23 by which they are supported on the shaft, and have their outer ends braced by a ring 22.

y A partition 25 divides the lower part of the casing from the part adjacent to the gauze, the intermediate part of this partition being provided with a circular opening 26, the edge of which is adjacent to and approximately in register with the ring 24.

The operation of the device is very simple. During weather which is not very cold, the door 15 is closed and the fan draws its entire supply of air in through the conduit 11 and forces it out through the gauze 17. The air is distributed by the fan, and being also under pressure passes out over the entire area of the gauze, and is thus evenly diffused and distributed in all direc-" tions. If the weather is so cold that the volume of air passing through the ventila;

tor directly from the outside would unduly lower the temperature of the room in the neighborhood of the fan, the door 15 is opened to a suitable extent so that the air passing through the ventilator is diluted to the desired amount with the warm air of the room, the amount of fresh air taken directly from the outside, however, being.

. sufiicient to properly ventilate the room.

. column the casing 30 rests. This column is The principle of the ventilator illustrated in Fi s. 5 to 8 is the same as that of ventilator in Figs. 1 to 4 but in the second form, the casing 30 has both ends substantially alike and is provided with a central downwardly projecting inlet conduit 31 forthe cold air and a pair of warm air inlet openings 32. The conduit 31 is received in a duct 33 of the column 33, on top of which placed within the room at a suitable height; and the duct 33 communicates with the outside air. The openings 32 are provided with suitable doors 35. In this form the armature shaft of the motor 40 passes from end to end of the casing and is provided centrally with double inlet fan composed of a pair of fans 41 similar to the fan hereinbefore described, and having the disks 43 suitable or desired size.

taining the fans and limited by the gauze 37 while the lower part communicates with the conduit 31 and the openings 32. .The partition is provided with two openings 46 one for each fan.

In operation air is drawn in through the duct 33, the conduit 31 and passes out through the gauze 37. The doors 35 may be opened to dilute the cold air with warm air from the room.- M

The first form of the inventionis particularly adapted for window ventilation and would naturally be of small form; while the second form is particularly adapted for larger work and can be made of any In either case the taking in of acertain amount of the air from the room or. apartment dilutes the fresh air coming in and also keeps the air in circulation and also takes off the chill of the fresh air in cold weather. However, the ap paratus could be made without the openings 12 and 32 if desired.

In both forms the air being supplied under pressure to the fine gauze, forces through the gauze any dust particles or the like which would otherwise tend to clog the gauze.

These ventilators effect a plentiful supply of air at all times and seasons by the expenditure of a minimum amount of electricity and without any perceptible draft, the

air being supplied under slight pressure and I so difi'used,modified and minutely delivered under pressure through the gauze over a comparatively large ag'ea that its presence flowing into the apartment or room in volume .will not be felt within a couple of feet from the gauze, although the feeling of freshness will be present all the time and stulfiness avoided and good ventilation assured.

Various changes in the construction and Y details of these ventilators may be made without departing from the spirit and scope of the invent-ion as claimed.

I may provide a -filteringand disinfecting means as shown in Figs. 9 to 11. This means consists of anenvelop or covering 50 which may be fastened around-the gauze of the casing and secured under the rings 18 or in any' other convenient manner. This envelop. will be kept inflated by the air res sure from within and will assume the ormt places either for drying the air, for disin fecting, perfuming or for impregnating it with medicinal substitutes.

I- claim as my invention: 1. Ina ventilator, the combination of a hollow base formed as an open ended condu'it, an archshaped chamber erected on said base and 1n communication with the 1nterlor of said base, said arch-shaped chamber having a vertical wall formed with a inlet center opposite said circular opening,

said fan runner adapted to draw air through the hollow base and through the circular opening and to discharge it tangentially into the space between the chamber and the perforated covering.

2. In a ventilator, the combination of a' hollow casing including a hollow base formed as an open-ended conduit and an incomplete cylindrical part erected on said base, the cylindrical part having a perforated circumferential wall and imperfor'ate two subscribing witnesses.

end walls, an arch-shaped chamber disposed within the cylindrical part and communicating with the interior of the hollow base, one end wall of said chamberbeing constituted by part of one end wall of the cylindrical part, the roof and second end wall of said chamber affording a partition between the interior of the cylindrical part and'the base, the second end wall of the chamber having a circular opening and being spaced from the second end wall of the cylindrical part, and a centrifugal open fan runner disposed between the second end wall of the chamber and the second end wall of the cylindrical part, the inlet center of said fan runner being disposed opposite said opening, said fan runner serving to draw air through the open end of the base and through the said circular opening, and to discharge such air through the perforations in the said circumferential wall.

In testimony whereof, I have signed my name to this specification in the presence of JAMES KEITH.

' -Witnesses:

WM. H. BERRIGAN, AMBROSE L. OSHEA.

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