US 1773909 A
Description (OCR text may contain errors)
Aug. 26, 1930. F. KoRB 1,773,909
BLOWER Filed May 17, 1929 2 Sheets-Sheet l Aug. 26, 1930. F'. Kol-4B 1,773,909
BLOWER Filed May 1'7, 1929 2 Sheets-Sheet 2 Patented Aug. 26, 1930 UNITED STATES PATENT OFFICE FRED KOBB, I' CHICAGO, ILLINOIS, ASSIGNOR T0 INDUSTRIAL GAS` ENGINEERING COMPANY, ACORPOBATION 0F ILLINOIS BLOWER Application tiled lay 17,
This invention relates to improvements in blowers, and'mo're especially a heat-resisting blower' adapted for use in connection with heating and dryin apparatus where hot gases pass through t e blower.
y One of the features of my invention is the provision of means for cooling the operating shaft of the blower.
Other features and advantages of my invention will 'a pear more fully as I proceed with my speci cation.
'In that formof device embodying ,the features of my invention, shown in the 'accompanying drawings:
Figure 1 is a view in perspective; Fig. 2 is a vertical sectional view, Fig. 3 is a view in perspective of the shaft showing the same removed, Fig. 4 is a similar View showing a.
modified form of collar, Fig. 5 is a, similar 2'0 view showing a modified form, and Fi 6 is a similar view showing another modi cation.
As shown in the drawings, the fan comprises a housing formed of inner and outer walls 10 and 11, respectively, separated by a suitable insulating material 12, such as absestos. 13 indicates the gas inlet to the blower. Inside of the housing, I provide a fan 20 mounted on the rotatable shaft 18. 21 indicates a bearing for the shaft, the same-being supported by the members 22 from the outer wall 11 of the casing. At one side the casing for the fan is provided with an opening 23 to accommodate the shaft 18,.said opening being large enough to-admit air into the cas" ing around the shaft 18, as indicated by the arrows.
Means are provided for cooling the shaft 18; a Several modificationsy are shown. In the o forms shown in Figs. 1, 2, 3 and 4, the shaft V18 is provided with parallel longitudinally arranged radiating fins 23,sector shaped in cross section. These fins radiate .the heat from the shaft and lthe air current assists in cooling them. Cooling the shaft in this manner lesse'ns the amount of heat transmitted to the bearing 21. 24.- indicates a collarconnecting the walls 10 and 11 around the shaft 18 with its cooling fins 23. 4 'l In the form shown in Fig. 4, the collar 24 1929. Serial N0. 363,787.
is also provided with inwardly projecting cooling fins 24.
In the form-shown in Fig. 5, the shaft 18 instead of being provided with the longitudinall arranged sector-shaped fins 23aL is provi ed with a single flat helical or spiral fin 123, said fin p re erably being wound so that rotation of the shaft as indicated by the arrow will cause its screw action to assist movement of the cooling air.
In the form shown in Fig. 6, the shaft 18 is provided with a plurality of disc shaped cooling fins 223 provided with holes 2231. While I have shown and described certain embodiments of my invention, it is to be understood that it is capable of many. modifications. Changes, therefore, .in the construc-` tion and arrangement may bemade without departing from the spirit and scope of the invention as disclosed in the appended claims, in which it is my intention to claim all novelty inherent in my invention as broadly as possible, in view ofthe prior art.
What I regard as new, and desire to secure by Letters Patent, is: l
1. In a device of the character described; a fan mounted on a rotatable shaft; a double walled housing for the fan provided with an opening to accommodate the shaft; a collar inside of said opening joining the walls of the housing, said collar being large enough to admit air through the same around the shaft into the housing; and longitudinall arranged parallely coolingl fins on the sha inside of saidcollar, said ns being sectorshaped in cross section. v
2. In a device of the character described; -a fa'n mounted on a rotatable shaft; a double walled housing for the fan provided with an opening to accommodate the shaft; a ycollar insideof said opening joining the walls of the housing, said collar being large enough to admit air through'the same around the shaftrinto the housln and longitudinall arranged parallel coo ing fins Aon the sha 'inside of said collar.
In testimony whereof, I have-hereunto set m hand and affixed my seal, this 9th day of ay, 1929. A f FRED KoRB.4