US1324231A - Thomas m - Google Patents

Description

T. M. CONDON.

m. w APPLICATION FILED IULY Na |9I9.v

Patentd .9,1919.

particularly of the electrically operated type. and anl object of the invention is to THOMAS M. CONDON, OF VALLEY CITY, NORTH DAKOTA.

FAN.

specification of Letters Patent.

Patented Dec. 9, 1919.

Applicationnled July 14, 1919. Serial No. 310,574.

T 0 all whom 'it may concc'n:

Be it known that I, THOMAS M. Cox'oox, a citizen of the United States, residing at Valley City, in 'the county of Barnes and State ofXorth Dakota, have invented certainnew and useful Improvements in Fans, of which thefollowing is a specification, reference being had to the ac-companying drawings.

This invention rclates to an improved fan,

provide a fan of this kind, which, when in motion will throw a blast of air covering a radius of from one hundred to one hundred and sixty degree angle, instead of throwing a straight current of air substantially directly in front of the fan, as is accomplished by the ordinary fan, thus eliminating the necessity of mounting the fan to revolve on an arcuate curve. I w

A further object of the invention is to provide a fan of this kind having blades curved outwardly and rea-rwardly, the end portions of the blades being of greater curves than the hodies of the blades, thereby eliminating the straight blades, so as to discharge or throw a current of air of :a wide area. vWhile it has been found that a current of air from a fan of this kind may not be as strong as emanating from the ordinary straight bladed fans, it will be a steady current, covering ,considerable area.

A further object of the invention is to provide a fan wheel having curved blades of the kind heretofore mentioned, and meansfor pirotally mounting the blades in coperative connection with'the revolving shaft of the fan motor, in combination with means carried by the shaft, coperating with the connecting ends of the blade's for adjusting the blades, so as to regulate the positions. of the blades, thereby governing the area of the current of air, as well as regulating the angle of the current of air.

A further object of the invention is the provision of means for changing the. dispoy sition of the blades, that is changing all the blades correspondingly or changing the blades at different angles, whereby the current of air may be altered -as may be found necessary.

'Vhile the design and construction at present illustrated 'and setl forth is deemed preferable, it is obvious that as a result of a reduction of the invention to a more prac- 'tical form for commercial purposes, the invcntion may be susccptible to changes, and the rightA to these changes is claimed, provided they are' comprehended within the scope of what is -claimed The invention comprises further features and combination'of parts, as will be hereinafter set forth, shown in the drawings and claimed.

In the drawings:

' Figure 1 is a plan view of. an electrically operated fan constructed in accordance with the invention, showing the blades Curved, and the means for adjusting the blades at different angles, ,as shown in dotted lines and in full lines.

Fi Qis 'a sectional 'plan view, thereby ,showing the detail construction of the.. ad-

justing means, showing the blades adjusted at angles different to those shown in full and dotted lines inlFig. 1. Fig. 3 is a front view of Fig. 1. Fig. 4 is a sectional plan view of a .modified construction of the adjusting means for the blades, in which case only two blades arel used.

Fig. 5 is a. plan view of an electrically operated fan, showing the 'adjusting means for the blades eliminated.

Referring more .especially to the drawings,

1 designates a convent-ional form of electric' motor, adapted for use in connection with electric fans, for Operating the fan Wheels. This motor is provided with the usual loraid covered conductors, in the form of a cord, as shown at 2, and rovided with a plug 8, to

` engage a socket not shown), whereby electrical energy' may be supplied to the motor. The'shaft -l of the motor at' its outer end portion is provided With a threaded bore 5.

cent ends fastened at'28 to the hub 29,-

through-which the screw 30 extends. A nut 31 is threaded upon the screw 30, so as to coperate with the head of the screw, to

'hold the hub in different adjusted positionsI I By loosening the nut 31 and adjusting the screw axially through the shaft 4, the blades may be adjusted in different angles. For

i instance, When the head is'moved, axially in a direotion with the sh'aft 11, the blades will move slightly radially, in which case the current of air emanating fro'm the blades will' be thrown in a smaller area than when -may be tightened. By adjusting the screw axially from the shaft 4, the outer ends of the blade will be moved farther rearward, and in this casethe area of the current of air Will be increased. The fan blades` 12 are curved outwardly |and rearwardly as shown, the outer portions. of the blades being curved greater than the body portions, so that When the blades are in motion, they Will throw 'a current of a'ir of a wide range, that is of a wide area, more so than the ordinary fixed fan wheel,

Beyond the rectangular part 6 a eylindrical reduced extension 13 is formed, which is engaged by a dished Washer plate 14, there being a nut' 15 threaded upon the extension 13, thereby holding the. plates 7, 8 and 14 securely clamped together.

As shown in Fig'. L1, a screw l'threads into the bore 5, and is provided with a head 17.

' This screW passes through the slots 18 of the 'arms of the fan. blades.

inner adj acent overlapping ends of .the short Interposed between the adjacent overlapping ends is a pair of nuts 19 and 20. The nut 19 coperates With the head 17 of` the screw, for olamping the inner end of certain ofthe blades, say for instance one of the blades, Wh'ile the nut 20 coperates with an additional nut 21, for holding the innel` arm of a certairr'other blade in a different position to the position of the other blade; By this construction, it will be seen that the-blades may be arran ed at various angles relative to each other. owever, if desred, the blades may be adjusted at corresponding angles relative to each other, by loosening upon the various nuts, and rotating the screw inwardly through the bore of the shaft, after which the nutl maybe tightened, to hold the blades in osition. By adjusting the angles of the bll ades, and owing 'to the blades being curved `as shown, the

blades will throw a current of air of a Wide area.

In Fig. 5, themeans for .djusting the blades is eliminated, and inste. d the blades are mounted upon a hub 22, which is mountl ed on the rectangular part 23, there being opposing plates 24, to hold the hub 22 in position and 'a nut 25 is threaded upon the reduced cylindrical and threaded extension 26, to hold the parts in place. In this construction of device, the blades are curved, as in the previous instance, the ends of the blades being curved greater than the bodies of the blades, so as to throw a current of air a wide area.

It is to be understood that this particular construction of fan blade and means for adjusting the blade, may be applied to any form of electric fan, even those that are suspended from the ceiling and are operated by slow motors, so that the blast of air when descending will spread considerably.

The invention having been set forth, what i is claimed as new and useful 1s:

through -the hub and being a'djustable axi-z ally relatively to the .shaft. and connected thereto, whereby the bladesmay beadjusted at different angles. i

VIn testimony Jwhereof I hereunto afiix my V signaturefin'the presence of two witnesses.

p THOMAS M. ooNDoN. Witnesses: M. J. ENGHART,

J OSEPHINE EFTELAND..

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