US2476692A - Fan - Google Patents

Description

`July 19,- `1949- s. M; BERNsTElN v FAN 2 Sheets-Sheet l Filed D60. 18, 1947 S. M. BERNSTEIN July 19 1949.

FAN

2 Sheets-Sheet 2 Filed Deo. 18, 1947 Patented July 19, 1949 FAN Samuel M. Bernstein, Chicago, lll. e Application December 18, 1947, Serial No. 792,561

5 Claims. (Cl. 23o-273) The invention -relates to fans and more particularly to fans which are installed in a wall opening or window. It is an object of the invention to provide a fan which may be selectively employed either as a Ventilating or exhaust fan.

A further object constitutes the provision of means for conveniently converting the ventilating fan into an exhaust fan and vice versa.

It is a further object to provide means extraneous to the housing of the fan to arrange the fan for ventilation or exhaust.

It is also an object to provide certain features of construction and arrangement of parts tend.- ing to enhancepthe utility and eillciency of a device of the character specified.

With these and other objects in view which will become apparent from a disclosure of the invention, the latter comprises the means described in the following specication particularly pointed out in the claims forming a part thereof, and illustrated in the accompanying drawing, in which Fig. 1 is a front view of a fan constructed in accordance with my invention.

Fig. 2 is a rear view.

Fig. 3 is a top plan view.

Fig. 4 is an enlarged section on the line 4-4 of Fig. 1.

Fig. 5 is a partial Itop plan view as from line 5-5 of Fig. 4, and

Fig. 6 is an isometric view of the upperv end of the supporting shaft.

Fig. '7 is a top plan view of a modification.

Fig'. 8 is a section on the line 8-8 of Fig. 7 on a reduced scale, and

Fig. 9 is an isometric view of the upper end of the supporting shaft. i

Referring to the several views in the drawing I vdesignates a wall plate which at itsouterend is bent at right angles to provide a ange I I. The terminal end of said ange is folded upon itself as at I2 to overlap a ange I3 of reinforcing plates I4. The plates I4 have large' semi-circular cut-out portions l at the meeting edges to provide a circular opening for a purpose presently to be described. The plates I4 may be secured to the wall plate I0 by screws or rivets I4a.

The wall plate I0 is formed with a' large circular opening I6 and the edge of said opening is bent `outwardly to provide a circumferential flange Il. The opening dened by the reinforcing plates I4 and the opening I6 are concentric.

A casing I8 is secured to the wall plate by being 2 provided with flange I 9 which is welded or brazed to the wall plate I0.

A motor 20 is positioned within the opening I6 and protrudes beyond the vertical plane defined by the outer edge of flange lI I.

Straps r2| and 22 .surround the casing of the motor and are secured together at appertaining ends by bolts 23. A supporting rod or shaft 24 is welded or brazed to the upper strap 2l. The shaft 24 rises from the strap in vertical direction and is oifset inwardly to form a knee 25 and thence continues in vertical direction. To the upper end of shaft 24 is rigidly secured a link or arm 26 fromv which rises a bolt 27 projecting through an arcuate slot 28 in the top of the casing 8 dening a semi-circle. The bolt 21 is threaded at the top to receive a nut 29 lwhich permits the shaft to be locked in adjusted position.

To the strap 22 a shaft 30 is secured by Welding or brazing which is also offset to form a knee 3| and thence continues vertically downwardly in registry with the inner portion of shaft 24. The shaft 30 is journalled in a grommet 32 held by a bracket 33'.

The shaft 34 of the motor 20 continues inwardly to carry a fan 35 which as shown in Fig. 4 when occupying the full line position acts as a Ventilating fan. The nut 29 then is in the position shown in Fig. 5.

If it is desired to operate the fan as a suction or exhaust fan. the nut 29 is loosened and moved counterclockwise whereby shafts 24 the fan to in Fig. 4.

The casing I8 is open at the sides and front and has a screen 36 for the passage of air.

It is evident that the fan is supported to rotate about a vertical axis parallel to the central longi tudinal axis of the fan blades so that the ian blades normally rotate about horizontal axis and may be also moving around' about a vertical axis.

and 39 by the crank arm 26,- causing occupy the `dotted line position shown The modification shown in Figs. 7 to 9 differs from the previously described embodiment therein that the crank shaft is dispensed with and in-lieu thereof a straight shaft employed.

As shown, the motor 36 is surrounded by straps 31 and 38 which areseoured together at appertainingV ends by bolts 39.

Vertical shafts 40 .and 4I arerespectively secured by welding or brazing to the straps 3l and 38..

To the motor shaft 42 is secured a fan 43. The casing 44 has an arcuate slot 45 in which is rotation is imparted to guided a bolt 46 rising from a horizontal arm' 3 I1 which is below the upper casina wall and is rigidly secured to the shaft 40. The end of the bolt protruding from the casing carries a nut It.

It is evident that upon moving the arm throughout the slot 25, the motor will be turned about 180 so that the fan instead of the full line position will be reversed to occupy the dotted line position shown in Fig. 8.

While the drawing shows two embodiments of the invention, numerous changes and alterations may be made without departing from the spirit of the invention.

I, therefore, do not linut myself to details of construction or arrangement oi parts, as shown. but wish to include all modications and revisions constituting departures within the scope of the invention, as defined in the appended claims.

I claim:

1. In a fan, a housing surrounding said fan, a crank shaft secured to said ian, means for rotatably supporting said crank shaft in said housing, a crank arm secured to one end of said crank shaft and a bolt on the free end of said arm and projecting through an arcuate slot in said housing.

2. In a fan, a housing surrounding said Ian, a rod supporting said fan removed from the blade carrying end, an arm secured to one end oisaid rod. and a -bolt extending from the free end of,

said arm through an arcuate slot in said housing.

3. In a reversible fan, a casing, a U-shaped rod having oiset ends each mounted in an opposite wall portion oi said casing whereby to aiord a trunnion, a fan unit mounted in the bight portion of said rod trunnion, a crank connected to one of said onset ends, an arcuate slot in the wall of said housing adjacent said crank, and a crankoperating element projecting from said crank through said slot for manual access -to rotate the trunnion.

4. In a reversible fan structure, a casing. a pair of complimentary yoke pieces formed to clamp a ian unit therebetween, a rod secured to each said yoke piece and each said rod having an onset end portion, means for clamping said yokes together to secure a ian unit as aforesaid, with said rods defining a trunnion, said onset rod end portion being pivotally mounted in opposite wail portion of said casing whereby said ian unit may be rotated by said trunnion to reverse the air iiow.

5. The structure defined in claim 4 and further characterized in that one of said offset rod ends is provided with a crank having a radially disposed handle member projecting through an arcuate slot in an adjoining wall portion of said housing for manual engagement to oscillate said t'runnion between reverse positions.

SAMUEL M. BERNSTEIN.

REFERENCES CITED The following references are of record in the ille of this patent:

UNITED STATES PATENTS

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