US956229A - Electric fan. - Google Patents

Description

n.1. THoMrrsoN,

mncrm mi.' K LPPLIUIIOI FILED ILIAS. 1909.

famme Apr. 26.1910.

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. R. P; THOMPSON.

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n." fan-nuca mmm-mum nagaan. o-`c I Y To all whom it may concern:

.RALPH P. THOMPSON, 0F SPRINGFIELD, OHIO.

ELECTRIC FAN.

Be it known that 1', RALPH P. THOMPSON, acitizen of the United States, residing at Springfield, in the countyv of Clark and State of Ohio, have invented a new and useful Electric Fan, of which the lfollowing is a specification.

My invention relates to that type of electric fans knownY as oscillating fans, being so named from the fact that a bearing is provided upon the stationary part of the fan, and upon which the body may turn from side to side, as the fan rotates, for the urposc of distributing the air current that 1s projected from the tan blades. 7 The object of my invention is to provide means, by the use of which an oscillating fan, which uses the air current as the motive pewerjfor Athe oscillating movement, mayr become self-starting. I accomplish this by applying a constant pressure upon the movab e reversing vane, of either air pressure, or by frictional contact with the armature shaft, the pressure being sov applied that it always moves the reversing vane into the opposite operati\'e position when the reversing vane is releasedby the releasing meehanism.

I n the accompanying drawings, which form a part of these specifications, F1 gure 1 shows a side'relevation of the fan and in which certain parts are broken away to better show the construction. Fig. 2 is a front elevation of the fan. Fig. 3 is a rear view of the fan body and upper part of the fan base, with the `aard and blades removed.

F 1g. 1 shows a sectional View of the fan inr which the body A is supported on an anti-friction bearing a in the base B, and upon which the fan body may turn from side to side through an arc of a circle which is limited b v the stops t and t', Fig. 2 and Fig. 3, which come in contact with the striker pin p located on the arm T.

The vane V, Figs. 1 and 2 ,is the reversing vane. and is supported by the arm r, Fig. 1 and Fig. 2. vT he arm r is attached to a spindle s Fig. 1, which has a bearing in the varmature shaft S which is in the form of a tube. The spindle s forms a pivot for the arm r at p,jFig. l and Fi 2, around which the reversing vane V, an itsY counter weight lV which is attached to the arm r, may revolve. The vane V is set at an inclination to the planein which it revolves, which angle of inclination is in the same Specificationof Letters Patent. Patentedipr 26 1910,

Application filed January`23, 1909. Serial No. 473,325.

direction as the angle ofthe blades themselves. f l

The spindle s has fixed upon its opposite end a shortcrank c, which in turn carries a roller ai, Fig. 1 and Fig. 3. On the body of the fan a stud u is fastened, Fig. 1, and upon this stud isV journaled an arm T that carries the striker pin 72 and passing beyond, is bent up and formed at lts top into an ,l t ni TEDsTA'rEs PATENTOFFICE. v *g escapement device K, Fig. 1 and Fig. 3. 1

T he escapenient K is rovided with two surfaces f and f whic roller d.

In operation, the reversing vane V being held in front of the blades with the arm r.

extending in a horizontal position with. the roller d, Fig. 1 and Fig. 3, normally resting on one of the flat surfaces of the escapement K, the unbalanced reaction of the air current will cause the fan to turn upon the hea ring a. The reversing vane V, having the surface which is presented to the action of the air current set at an angle to the plane in which it revolves, has a tendency to travel along with the blades as the puffs of air from the blades strike the vane and react in the direction of the small arrow at edge of vane, Fig. 1. The friction of the spindle s' in the shaft S also tends to turn the reversing vane in the same direction. The reversing vane is resisted from turning upon the pivotal point pby the roller cl which normally rests on one of the faces for f of the escapement K. In the views shown, the movement of oscilla'- tion is to the left as indicated by the arrow at bottom of guard Fig. 2.' The roller (l is shown resting on the surface f of the escapement K, Fig. 3. As the movement continues the striker p upon the arm T Fig. l and Fig. 3, will come in contact with the stop t and a movement. of the arm T and escapement K will take place, which will free the roller d. At the same time the surface f' is brought into the path of the roller i as it revolves in the direction of the arrow, Fig. 3, andthe roller cl through its solid connections with thereversing vanewill bring the reversing vane V into opposite operative position when the roller d comes to rest on the surface of the escapement K. The force y reversing vane tends to. revolve it from one opera-tive position to. the opposite, and if unrestrained would tina-ily cause the reversing vane to revolve almost as fast asv the. blades themselves. 0n the other hand the act as stops to the E y f 956,229

friction .of the s indle s in the shaft S could be increase until the reversing vane vwould travel with the blades, even if its inclination to the plane kin which it travels vere reversed.

' In the preferred form shown in Figs. 1, 2, and 3, I have taken advantage of bot-h the aircurrent, and frictional contact, to give motion to the -reversing vane, and have adapted an cscapement mechanism to obtain the intermittent movement ef the reversingvane which is necessary in order to establish an oscillating movement ofthe fan. W'hen the fan is started the escapement mechanism will b e brought. into contact with the stops with suicient force to move the escape-ment and cause the reversing vane to take the op' posite operative pos1t1on, and 1t is therefore self-starting at all times. Y.

Other forms of this invention than those shown are attainable in which friction alone, or air pressure alone, may be used as the constantly applied force for movingl the reversing vane from one operative position to the opposite. I therefore do not confine myself to the forms shown herewith, but desire to secure Letters Patent on the following:

1. In an oscillating fan in 'hich the reaction of the air current is used, as the propelling power for causing the oscillating movement, a vane interposed in the path of the air current, and upon which the air current impinges thereby unbalancing the reaction of the air current in relation to' the bearing of oscillation, a rotatable spindle and an arm attached thereto and extending radially therefrom, said arm adapted to hold said vane in operative position 1n front 4 of the fan blades and at one side of a plane central of the fan, and an escapement mechanism operated by stops on the stationary art of the fan, said escapement mechanism ing adapted to release said rotatable spindle and again arrest its movement, when tie detiector or vane has been moved into Vopposite operative position.

2. In a reaction type oscillating fan, the combination with a rotatable reversing mechanism for unbalancing the reactionary force of theI air current in relation to the bearing of oscillation, a deiiector attached Y te said rotatable reversing mechanism, said detlector acted upon by the air current from the fan, and adjusted to cause a constant pressure tending to move the rotatable reversing mechanism from one operative position to the opposite, a device for retaining said rotatable reversin mechanism in either operative position, an a releasing mechanism operated by a trip on the stationary part of the fan andvadapted'to release the reversing mechanism to cause 1t to move under the iniiuence of the air current.' to the opposite operative position.

3. In a reaction type oscillating fan the combination .vith a rotatable reversing mechanism for unbalancing the reactionary force of the air current in relation to the bearing of oscillation, frictional contact 'netween said rotatable reversing mechanism and the armature shaft, a device for retaining said rotatable reversing mechanism ia either operative position, and a releasing mechanism operated b v a trip on the stationary part of the fan and adapted to release the reversing mechanism to cause it to move under theinliuence of the frictional contact to the opposite operative osition.

4.. The combination in an oscil ating fan, having fan blades carried by a motor, and which motor is adapted to oscillate upon a bearing on a stationary member, of a revoluble friction driven reversing vane mounted upon the oscillatin part of the fan, and means upon the said stationary member, adapted to act upon the revoluble reversing mechanism for the purpose of controlling the stroke of oscillation of the motor upon its bearing upon the said stationary member. Y

RALPH THOMPSON.

Witnesses z EMIL Korn, O. P. EDWARDS.

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