US1875881A - Fan housing construction - Google Patents

Description

Sept. 6, 1932. c. T. MORSE 1,875,881

FAN HOUSING CONSTRUCTION F iled Jan. 27, 1951 4 Sheets-Sheet 1 I l2 3' FIG. 1

)NVENTOR Clfikk 7.140255 BY WM v ATTORNEYS I Sept. 6, 1932. c. T. MORSE FAN HOUSING CONSTRUCTION Filed Jan. 27, 1951 4 ShetS-Shee'g 3 FIG. 3

INVEN'T R 'CLARK T. M01955. BY o/g/ltflw/ ATTORNEYS Sept. 6', 1932. ofis 4 1,875,881

FAN HOUS ING CONSTRUCTION Fi led Jan. 27, 1931 4 Sheets-Sheet 4 sNvENTOR (LHRK T. MQRJ'E.

BYW LW' ATTORNEYQ Patented Sept. 6, 1932 UNITED sures; ra'ranr orrlca CLARK '1. MORSE, 0F DETROIT, MICHIGAN, ASSIGNOR T0 AMERICAN BLOWER CORPORA- -TION, 0F DETROIT, MICHIGAN, A CORPORATION OF DELAWARE FAN HOUSING CONSTRUCTION Application filed January 27, 1931.

tion employing a ring, a shaft support in the ring which reenforces the ring at the same time it accurately supports the shaft on which the fan is mounted; the attachment of the ring to the fan housing and the support of the fan housing from the ring are in such a manner that the support may be located any place around the ring.

Referring to the drawings:

Figure 1 is a side elevatlon;

Figure 2 is an elevation of Figure 1 fromthe discharge end of the fan;

Figure 3 is a section on the line 3-3 of Figure 1;

Figure 4: is a section on the line 4- 1 of Figure 1.

Referring to the drawings in detail, 1 designates the scroll of sheet-metal forming the exterior wall of the fan casing. This scroll terminates at the top and bottom adjacent the frame 2 through which the air may be exhausted from the multi-bladed fan 3 which is carried on the transverse shaft 4 in the bearings 5 and 6.

The air enters the fan through the eye 7 and is guided therein to the fan by the annular Venturi shaped inlet passageway ring 8, the outer margin of which is formed into an angular flange 9 that is either welded or bolted to a similar flange 10 on the ring 11. The ring 11 is welded at its juncture line with the side 12 of the fan housing which may be either bolted or welded to the scroll portion of the housing 1. Between this ring 11 and the periphery of the side wall l2 are a number of plate ribs welded to the ring Serial No. 511,569.

' at their ends and to the side walls 12 on their legs 17 and 18 which are provided with feet portions 19 and 20 and diagonal brace portions 21 and 22 which are oined on a ring supporting ortion at 23 in association with the rib 15. our sets of bolt holes are made in the ring at equidistant points on the periphery, three sets bein used at one time. It will be noted that the entire structure, consisting of portions 17, 19, 22, 23, 21 and 18, is formed of a single piece of flat metal, but may be made of multiple pieces. The points of attachment of the portions 17 and 18 to the ring 11 are adjacent the ribs 14 and '16 and also adjacent the points of attachment of the cross support 2 for the bearings, either 5 or 6. 0n either. side of the bearings beneath the cross support 24 are vertical supports 25 and 26 which are welded at oneend to the cross support 24 and at' the other end to the inlet Venturi ring 8 just as the ends 2% are welded to the venturi 8. The points of attachment of the vertical supports 25 and 26 to the ring 8 are adjacent to points where the braces 22 and 21 engage the exterior of the ring 11. Thus, a truss structure is formed of cheap,-flat, easily formed metal which can be welded together arranged in any desired configuration, thickness or width. without the use of a special fixture, jig, tool or die and with the complete elimination of castings. The leg support and reenforcing can be arranged at any point around the periphery of the ring 11, although preferably in the position shown and the fan housing can besupported with its fan in any desired position. By the use of a concentric 'reenforcing su porting ring and the Venturi ring, I provi e at one operation and with one assembly an inlet passageway bers 17, 22, 21 and 18, all of which are welded to the surface of the side wall 12, it is possible to usea relativel thin sheet for the side wall 12 which will ave great rigidityand be equivalent to a very thick and expenmeans for supporting said casing, fan shaft and fan in spaced relation from a base surface, consisting of a member selectively positioned and attached to the opposite sides and bottom of the ring, said member having sive and difficult piece of metal. All tendthe shape of an inverted M.

encies to vibration, hum and other disagreeable noises Will be thus eliminated.

It will be further noted that the fan, its bearings and shaft ring directly upon the supporting surface, such as the floor or the wall, through this support arrangement do not have a tendency to transmit the movement and vibrations of the fan to the fan ousing. I

I will be understood that I desire to comprehend within my invention such modifications as may be clearly embraced Within the scope of my claims and invention.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. In a blower casin the combination of end walls and side wal s, a plurality of reinforcing strips attached on their inner edges to the side walls and projectinglaterallytherefrom, a ring connecting the inner extremities of said strips, said ring being attached to the side Wall in which it is located, and means for supporting a fan shaft bearing in said ring, said ring, stripsand side walls being integrally Welded to one another, and a separate supporting means for supporting said casing, fan shaft and fan in spaced relation from a base surface, consisting of a member selectively positioned and attached to the opposite sides and bottom of the ring.

2. In a blower casing, an end wall and side walls, a plurality of radially disposed sheet metal plates welded on their inner edges to the outer surfaceof the side walls, and a ring connecting the inner ends of said metal plates to one another and to the side walls, a bearing support detachably supported in said ring, and a separate supporting means for supporting said casing, ,fan shaftand fan in spaced relation from a base surface, consisting of a member selectively positioned and attached to the opposite sides and bottom of the ring, said supporting means having a plurality of vertical, horizontal and diagonal portions forming an inverted M.

3. In combination, a casing having end walls, side walls and diagonally disposed braces consisting of plates at right angles to the side walls, the inner edges of the plates being welded to the side wall surfaces, rings supported by the inner ends of said plates and said side walls, bearings mounted in said rings, a fan and fan shaft carried on said bearings, and transverse supportin plates bisecting a portion of said rings or supportingl said bearings, one of said bisecting plates aving a vertical support between it and the ring, and a separate supporting In testimony whereof, I aflix my signa-

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