US1317080A - Cooling-fan fob motobs - Google Patents

Description

H. J. ERNSTER COOLING FAN FOR MOTORS.

APPLICATION FILED ocnze. 1911.

Patented Sept. 23, 1.919.

INVENTOR zlfi'rizsier;

wlmesss ATTORNEY HENRY J. ERNSTER, 0F DEERWOOD, MINNESOTA.

coonmamn roa Morons.

Specification of Letters Patent.

Patented Sept. 23, 1919.

Application filed October 26, 1917. Serial No. 198,663.

To all whom it may concern:

Be it known that I, HENRY J. Enns'rnk, a citizen of the United States, residing at Deer-wood, in the county of Crow Wing and State of Minnesota, have invented certain new and useful Improvements in Coolmg- Fans for Motors, of which the "following 18 a specification.

This invention is a fan and has speclal reference to cooling fans for internal combustion engines.

One object of this invention is the production of a cooling fan for engines whlch is constructed so as to regulate the volume of air driven past the engine owing to the changes in atmospheric conditions.

Another object of this invention is the production of a cooling fan for englnes which is especially adapted for use in combination with the englnes of automobiles, thus regulating the volume of air driven past the engine in regard to the temperature, thus relieving the necessity of providing adjustable shutters of the radiator or hood as well as limiting the necessity of other complicated constructions for bringing about this desirable feature.

Another object of this invention is the production of a cooling fan for engines which has blades adjustably mounted upon a frame, thus allowing the blades to be adjusted for regulating their pitch, thereby causing the blades to be so regulated as to permit a great volume of air to be driven past the engine on warm days although the blade may be turned so as to be in practically neutral position for reventing the forcing of air past the engine or may be turned to a reverse for counter-acting .the effect of the air which may pass into the front of the hood or. through the radiator, thus reventing the passing of chilled air into t e engine on a cool or cold day.

A still further object of this invention is the production of a cooling fan for engines which is provided with simple and efiicient means for supporting and regulating the pitch of the blades.

With these and other objects in view this invention consists of such novel com inations, construction, and arrangement of parts as will be hereinafter fully described and claimed.

One practical form of construction and assembly of the present invention is illustrated and described in the accompanying drawing, in which F i re 1 is an elevation of the cooling fan assembled and constructed in accordance with one embodiment of the present invention.

Fig. 2 is a horizontal section taken on the line 2-2 of Fig. 1, looking inthe direction of the arrows.

Fig. 3 is a fragmentary detail sectional vieiw of one of the inner ends of one blade an Fig. 4 is a detail perspective View of one of the dogs.

Referring to the accompanying drawing by numerals, it will be seen that the housing 1 1s hollow and is preferably of an elongated construction, although it is of course obvious that it may be formed of any desired shape. This housing 1 is inclosed and may be of a sectional or any other suitable construction. The housing 1 is provided w1th allned openings 2 formed in its side portlon through which the shaft 3 projects. This shaft 3 is elongated and is preferably square in cross section as illustrated in Flg. 1. This shaft 3 is provided with racks 4 upon a pair of its sides, as illustrated clearly in Fig. 2 and these racks are formed so as to be carried entirely within the hous- 111%1 for purposes to be hereinafter specifie It Wlll further be noted that the ends of the shaft 3 projects for considerable distances beyond the ends or sides of the cas- Eng 1 for purposes to be hereinafter speci- The pair of dogs 5 are carried within the housmg 1 and a dog is positioned upon each side of the shaft 3, as shown in Fig. 2. It will be noted that these dogs 5, have reduced projections 6 extending rearwardly therefrom, thus making the dogs substantially sector shaped, and upon the forward edge of each dog there is formed a rack 7. It will also be noted that a square opening 8 projects through the projections 6 of each dog as illustrated in Fig. 1.

Each fan blade 9 is provided with a thickened neck 10 thereby forming a shoulder 11 from which extends the square shank 12 terminating in the reduced threaded extensions 13. In the form of the device herein illustrated, it will be seen that a fan blade is carried within each end of the housing 1 so as to form the shoulder 11 of each blade to bear upon the housing for formin r a support for the fan blade. The square shank 12 projects into the end portion of the housing 1 to pass through the squared opening 8 formed in the projection 6 of the jaw 5, as

illustrated in Fig. 2. The threaded extenthough the nut 14 retains the fan blade in engagement with the housing, as the nut will be firmly retained upon the threaded extension 13, it is obvious that the pitch of therethrou-gh an the fan'blade may be easily regulated by the turning of the blade.

A pulley 15 is positioned upon one of the projecting ends of the shaft 3 and this pulley is adapted to receive the usual belt of the fan now ordinarily used upon the engine, such belt not being deemed necessary to be herein shown. It is obvious that as the shaft 3 is squared and cross sectioned, rotary-motion imparted to the pulley will cause the shaft to be rotated as will be hereinafter fully described. A sectional. clamp is carried upon the opposite end of the shaft and this clamp comprises a pair of bearing portions 16 having cars 17 extending therefrom. The two sections of the clamp are positioned upon the projecting ends of the shaft3, the ears will fit upon each other for allowin the bolts 18 to be passed carry the usual nuts 19 for causing the two sections of the clamp to be firmly held in a fixed engagement with one of the projecting ends of the shaft 3. The two sections of the clamp are provided with grooves 20 to whichtlie yoke 21 of the arm 22is secured by the pins 23. It is of course obvious that the arm 22 may be extended to any suitable position for operation by a chauffeur say for instance as being carrled upon the dash or adjacent the steering wheel.

Inorder to hold the casin 1 from longitudinal movement as the sha t 3 is shifted to adjust the blades, the collar 24 is fixed upon one surface of the casing as shown in Fig. 2. This collar has an annular groove 25 in which extends the end of the rod 26. This rod in turn can be supported in any desired place and for this reason although it will ermit the housing 1 to rotate it is obvious 1t will hold the housing from longitudinal movement along the shaft 3.

For the purpose of bringing out clearly' are squared, it is obvious that the housing Wlll be caused to'rotate with the shaft 3 as will the various elements mounted upon this housing. As a result, the fan blade will be swung in a circle for directing. an air draft in one direction for cooling the engine adjacent which the device is carried. If it is desired to reduce the volume of air directed toward the engine, as for instance when the day is cold, the chauffeur may move the arm 22 and this will cause the sectional flange to shift slightly the shaft 3. As the shaft 3 is shifted, it is obvious that the intermeshing of the rack of the dogs and of the shaft will cause the dogs to be shifted in one direction and as the squared shanks of the fan blades are connected to the dogs, it is obvious these shanks will also be turned.

It will readily be seen that these shanks and the threaded extensions of the shanks constitute pivots for these dogs. shanks are turned, the fan blades 9 will also be turned and it is of course obvious that the shaft 3 may be moved to turn the fan blades to the pitch desired. If the day is cold, the fan blades may be turned so as to be in a substantially neutral position thus preventing the direction of a volume of air toward the engine or if the day is very cold the blades may be slightlyreversed so as to counteract the effect of the air rushing into the forward portion of the hood or through the radiator due to the rapid movement of the automobile. As a result, the engine will be protected from a cold volume of air and for this reason may be warmed very quickly to operate efliciently even When the weather iscold. If, however, the day is very warm, the shaft may be shifted in the opposite direction for increasing the pitch of the blades, thus causing the blade to have a firmer grip upon the air for increasing the volume as directed past the motor or engine and in this way the temperature of the engine may be reduced to a minimum, thus preventing the over-heating of the same. Owing to the fact that the pins 23 fit within the grooves 20 and the sectional clamp. it is obvious that the clamp will rotate in unison with the shaft 3 although the yoke 'will be in position at all times to easily shift the shaft for the purposes hereinbefore specified.

It is of course obvious that if so desired the shaft may be operated in any suitable manner as for instance by a thermostatic structure for automatically shifting the blade owing to the temperature within the hood or any other suitable manual means other than the one shown while a number of As the different ways may be employed for changing the pitch of the blade for the purposes specified. Therefore, owing to the fact that only one form of the invention has been shown inthe present case, it is not desired to limit the construction to the specific device disclosed as it is obvious that any changes may be made in the detail construction of the present invention as long as the changes do not exceed the spirit of the invention or the scope of the device as claimed.

What is claimed is:

In a device of the class described, the combination of a substantially elliptical housing said housing having alined openings formed therein, remote from the ends there of, a solid shaft extending transversely through the housing and projecting through said openings, said shaft being substantially rectangular in cross section, means for shifting said shaft longitudinally through said housing, means for imparting rotary motion to said shaft to rotate said housing, means for holding the housing from creeping along said shaft, said shaft having racks formed on opposite exterior side surfaces thereof, substantially sector lshaped dogs carried within said housing, said dogs having racks extending entirely across the broad ends thereof and engaging the racks of said shaft, the reduced ends of said dogs being carried in the reduced ends of said housing, fan blades having souared shanks extending through said housing and being carried by said dogs, threaded extensions projecting beyond said shank and extending from said housing, nuts carried upon said extension for holding said: blade against displacement, and the sector shaped construction of said dogs permitting of free swinging movement thereof, although causing the dogs to be of considerable length thus increasing the fulcrum of the shaft, whereby even though the blades may be cl g'ged or corroded they may be easily shifted by movement of said shaft through said housing.

In testimony whereof I afiix my signature in presence of two witnesses.

HENRY J. ERNSTER.

Witnesses:

C. A. MARTINSON, F. M. 'SCHWANKE.

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