US1636286A

US1636286A - Fan

Info

Publication number: US1636286A
Application number: US61868A
Authority: US
Inventors: Carl L Christensen
Original assignee: Individual
Current assignee: Individual
Priority date: 1925-10-10
Filing date: 1925-10-10
Publication date: 1927-07-19
Anticipated expiration: 1944-07-19

Description

I 1,636,286 y 1927' c. L. CHRISTENSEN FAN Filed Oqt. 10. 1925 2 Sheets-Sheet l Car/ 1.. abr/lsfens en,

gwuentoz cab/ 3m July 19, 1927.

' 1,636,286 c. CHRISTENSEN FAN Filed Oct. 10. 1925 2 Sheets-Sheet 2 II |l| |l Z 6 gwumwtoc m' nesses C'S'dun.

5 wad/m having a fixed Patented July 19, 1927 1 I UNITED STATES cm I;- cameraman, or DALTON, nnnnasx a.

- Application fled October 10, 1925. Serial No. amen.

This invention relates to improvements in motor. vehicle power plants which embody internal combustion en 'nes that are water cooled, and wherein t e cooling water is reduced in temperature by passing through an air cooled radiator. w

In power 'lants of the above kind the air is usually di'awn rearwardly throu h the radiator by means of a fan driven liy the engine and disposed directly behind the ra diator and in front of the engine. Thefans now commonly employed embody blades itch and adapted to draw the air rearwar ly through the radiator towards the engine.

It is well known that the engines of power plants of the above kind do not operate with maximum efliciency durin cold weather by reason of the fact that t e} fan maintains the cooling water at an excessively low temerature. It is also well known that the an now employed often results in freezing of the water in the radiator during 001 weather so that the water cannot circulate, and overheating of the engine results. It is still further well known thatpower lants of the above kind often. become fau ty in operation by reason of the fact that the water is kept at such a greatly reduced temperature that starting of the engine is only effected with great difiicult The primary object of the present invention is toprovide means operable for varying the amount of air drawn through the radiator in accordance with --the variations in.

eflicient operation of the engine.

Still another object of the invention is to provide means for discontinuing the forcible draft of air through the radiator whereby the liability of the water freezing inthe radiator in very cold weather is reduced to a minimum.

Still another object ofthe invention is to provide means for forcing the warm air from about the engine forwardly through the radiator, so as to have a warming effect upon the water in its passa e through the radiator whereby starting of the engine is facilitated and the efiiciency of the en inc is enhanced during abnormally cold weather I preferably accomplish the above objects by the provision of a fan between the engine and the radiator embodying blades reversible in pitch and adjustable in pitch so as to effect the desired draft of air in the desired direction.

A further object is to provide a fan of the above kind which is extreme] simple and durable in construction as wefi as efiicient in' operation. 4

Still another object of the invention is to provide a fan of the above kind wherein means is provided for facilitating ready control of the blades thereof by the driver of the vehicle.

Further objects will become apparent as the nature of the invention is better understood and the same consist in the novel form, combination and arrangement of parts hereinafter more fully described shown in the accompanying drawin and claimed.

In the drawing, w erein like reference characters indicate corresponding parts throughout the several views.

Figure 1 is a fragmentary elevational view illustrating an embodiment of the present invention.

Figure 2 is a front elevational view partly broken away, of the fan shown in Figure 1.

Figure 3 is a central longitudinal section of the fan shown in Figure 2.

Figure 4 is a transverse section taken on line 4-4 of Figure 3.

Figure 5 is a transverse section taken on line 55 of Figure 3.

Figure 6 is a transverse section taken on line 66 of Figure 3.

Referring more in detail to 5 indicates, a conventional form of water cooled internal combustion engine and 6 indicates a conventional form of air cooled radiator through which the water is circulated from the water jacket of the engine in a the drawings,

well known manner, the radiator 6 being 1 spaced from and in front of the engine.

In the embodiment of the invention shown, a horizontally and longitudinally disposed spindle is fixed to the cylinder block of theengine 5 by having its threaded rear end 7 screwed into a. threaded socket in the forward end of the engine block. The spindle 7 terminates at its outer end in a head 8 against which is positioned the forward end of a pulley 9 which is rotatably disposed u on the forward end of the spindle 7 e pulley 9 has a hollow ri 'd extension upon its forward end forming t e hub 10 of a fan which also embodies a plurallty of radial blades 11, which have shafts 12 upon their inner ends journaled in radial openings of the hub whereby the fan blades may rotate about their longitudinal axes. Secured upon the inner ends of the shafts 12 of the blades within the hollow hub 10 are spur gears or pinions 13, and slidable longitudinally through suitable openings in the .pulley 9,'are a plurality of rods 14, the forward ends blades 11.

of which terminate in rack bars that project into the hub 10 and each of which meshes with one of'the pinions 13 of the fan lidable longitudinally of the spindle rearwardly of the pulley 9 is a collar 15 to which the rear ends of the rods 14 are rigidly secured, and this collar 15 has an annular groove engaged by the inwardly projecting pins 16 on the ends of a fork 17, rovided upon one end with a lever 18, w ich is pivoted intermediate its ends as at 19 upon the horizontal arm of an angular bracket 20 suspended from the rear end portion of the spindle 7 as clearly shown in Figures 1 and 3. A bushin 21, is disposed on the spindle between the racket 20 against the engine block. The collar 15 is slidable on the bushing 21, and it is thus apparent that when the collar 15 is forced in one direction the pinions 13 are turned to adjust the pitch of the blades 11 in one direction while movement of the collar in the other direction effect adjustment of the pitch of the blades 11 in a reverse direction; In this manner the blades may be set in a plane at right angles to the axis of rotation of the fan so as to be neutral and have no action upon the air in so far as drawing or forcing the samethrough the radiator is concerned. Upon movement of the collar 15, in one direction, the rack bars of the rods 14 cause rotation of the pinions 13 for effecting rotation of the blades 11 about their longitudinal axes, and it is thus apparent that the blades may beset atthe desired pitch for effecting the drawing of the reuired amount of air rearwardly through t e radiator. On the other hand, movement of the collar 15 in the opposite direction will efl'ect a reverse rotation of the gears 13 so that the blades 11 are set at the desired pitch in a reverse direction for regulating the amount of air forced by the fan forwardly through the radiator. The heat of the engine will warm this air and when the same is forced forwardly through the radiator such air will have a warning effect upon the water passing there through for facilitating 1,ese,2ae

starting of the engine or increasin its operating efliciency in abnormally col weather as isobvious.

An operating rod 22 is connected to the lower end of the lever 18 and may be extended rearwardly to the instrument board 01 the vehicle so as to be conveniently manipulated by the driver of the vehicle.

The forward end of the hub 10 may be closed by a removable cover plate 23, held in place by set screws 24, and this cover plate may e removed for facilitating access to the pinion and rack bars for renewal or repair purposes.

From the foregoing description it is believed that the construction and operation as well as the advantages of the present invention will be readily appreciated by those skilled in the art.

Minor changes may be made without departing from the spirit and scope of the invention as claimed.

What I claim as new is: v

A fan for motor vehicle cooling systems including a stationary spindle, a pulley rotatably disposed on the forward end of the spindle and provided with a plurality of passages therethrough disposed about and parallel with said spindle. a hollow hub rigid with the forward side of said pulley, a plurality of rods slidable longitudinally in said passages and having their forward ends proecting into the hub forward ends of said rods being formed to set up rack teeth, ra

ward side of the pulley within the rear end of the hub, and means to maintain the pulley substantially in engagement with said head including a sleeve disposed on the spindle with its forward end abutting the rear side of the pulley, said collar being rotatably and slidably fitted on said sleeve.

In testimony whereof I aflix my signature.

CARL L. CHRISTENSEN.