US 1935314 A
Description (OCR text may contain errors)
Nov.14,1933. HLFINCHEML Y 1,935314 ADJUSTABLE CEILING FAN Filed Nov. e, 193.0 2 Sheets-sheet '1 ew a/WeiZ-stl Nov," 14, 1933.
H. I. FINCH El' AL ADJUSTABLE CEILING FAN 2 Sheets-Sheet 2 Filed Nov. 6, 1930 Patented Nov. 14, 1933 l l UNITED sTATEsPATEN'r ori-ics ADJUSTABLE CEILING FAN Herbert I. Finch, St. Louis, and Lawrence M. Persons, Clayton, Mo., assignors to The Emerson Electric Mig. Co., St.- Louis, Mo., a corporation of Missouri Application November 6, 1930. Serial No. 493,741
claims. (Cl. 17o-162) This invention relates to ventilatingfans of trated in the specic embodiment, and to each the type ordinarily known as ceiling fans, and boss is secured a blade supporting stud or pivot 6. more particularly to means in connection there- Blades 7 are each supported by a bracket 8 to with whereby the blades may be adjusted to dewhich the blade is attached by screws 9. Each 5 liver a current of air downwardly or upwardly of the brackets has a boss 10 anda socket 11 50 as desired. by which the blade is rotatably mounted onthe Ceiling fans are ordinarily operated with the stud 6. blades so positioned as to deliver a current of The spider3 is'provided with an annular groove air downwardly, but it often happens that while or seat in which 'is revolvably mounted a ring 10 such a current of air isundesirable, room ventila- 12 concentricwith the motor axis. A pin 13 is 05 tion is required and this may be secured by a secured in each of the bosses 10, extends into reversal of the air currents. the plane of the ring 12, and engages in a slot An object of this invention is, therefore, to 14 formed in a projection on the ring 12. It provide improved means whereby the pitch of -will thus be seen that by manual rotation of any 15 the blades may be changed so as to selectively one of the blades 7 the ring 12 will be revolved 70 direct a current of air downwardly or upwardly and each of the other blades 7 will be rotated as desired. in the same manner and in the same number of Another object of the invention is to providedegrees as the one turned by hand. The ring 12 improved means whereby adjustment of one blade may be secured in position in the annular groove will similarly adjust all ,of the other blades. in the spider by pins 16 and washers 1'7, as best 75 Other and further objects will be apparent shown in Fig. 3. from the following description. Detent mechanism has been provided to hold Fans of this type are ordinarily driven by an the blades in either of two selected positions. electric motor, the blades being carried by the That mechanism includes a compressible spring' rotating member of the electric motor. This in- 18 positioned in the socket 11 and having one 30 vention has been illustrated andwillbe described end bearing against the socket wall and the in such a fan. The :ian blades, of which there other end bearing against the end of the stud 6. are foul' in the Present embcdiment, are rotat- The spring has a tendency, of course, to press ably mounted on studs projecting from the armathe made outwardly and in the same direction as ture Spider and are arranged t0 have au Operatthat of the centrifugal force operating on the 35 ing connection with a ring concentrically and blades when they are rotated by the motor. DereVOlVably mcunted 011 the Spider- By this tent mechanism also includes a yoke or loop method rotation of one blade on its supporting member 19 secured on the spider 3, extending stud similarly rotates each of the other blades. about the pin 13 and having 'a pair of notches A detent is provided for each of the blade sup- 20-20 for engagement with the pin 13. 90
ports or brackets adapted to releasably secure The arrangement of the device is such that the blade in either 0f tWO Selected Positions. the blades when set in position will be held in Having thus generally described the inVeutiOn. c position until they have been intentionally admore specic description with reference to the justed by manua1 rotation of the blades. Cenaccompanying drawings will be made. trifugal force caused by the revolution of the 95 Fis. 1 is an inverted plan view of a device fan tends to hold the blades outwardly causing embodyingr the invention with the lower member. the pin 13 to engage in a notch 2o and thus constituting a bearing Support and lubricating acting in unison with the thrust of the spring cup. remOVcd fOr Convenience in illustration- 18. The arrangement of the device as a whole,
Fig. 2 is a vertical section of the device. including the action of the spring 18, prevents 100 Fig. 3 is a top plan View 0f the Spider including vibration or rattling when the fan is in operathe blade supporting elements and the adjuSttion. No independent levers are required, thus ing means. K A providing simplicity and economy in manufac- Fig. 4 is a vertical section of the elements ture aswell as reducing the cost of maintenance.
5o shown in Fig. 3. Y Adjustment of the blades can be made by mov- 105 Fig. 5 is a detail section taken on line 5 5, ing any one of the blades, the operator simply Fig, 4, grasping the blade that happens to be nearest A motor 1 has an armature 2, which carries to him. l a spider 3 secured to the armature by screws 4. It is obvious that parts of the invention may The spider has bosses 5, fourin number,asillus be used to advantage without the whole, and 110 that various changes may be made in the details of construction, within the scope of the appended claims, without departing from the spirit of this invention.
1. In a ceiling fan, the improvement comprising the combination of a ring revolvably mounted on a support, which is carried by a motor armature, concentric with the motor axis, a plurality of studs carried by and extending radially' from the support, blade bracket members rotatably and slidably engaging the studs respectively, engaging means operatively connecting the brackets with'the ring, whereby rotation of one bracket will' revolve the ring thereby rotating all the other brackets simultaneously, abutments unitary with the support vand adapted to engage abutments on the bracket, and springsengaging the brackets and the studs to press the brackets radially along the studs whereby the said abutments are normally in engagement and the brackets are thereby latched in selected position.
2. In a ceiling fan, the improvement comprising the combination of a ring revolvably mounted on a support, which is carried by a motor armature, concentric with the motor axis, a plurality of blade brackets pivotally mounted on the support with axes radial to the motor axis, permanent spur connections between the ring and the brackets, whereby rotation of one bracket will revolve the ring thereby rotating all the other brackets simultaneously, and yielding detent means adapted to latch the ring in one of two positions, namely, to deliver a current of air downwardly and to deliver a current of air upwardly.
3. In a ceiling fan, the improvement comprising the combination of a ring revol vably mounted on a support, which is carriedby a motor armature, concentric with the motor axis, a plurecaer-i rality of lblade brackets pivotally mounted on the support with axes radial to the motor axis, each ofsaid brackets'having an arm extending downwardly therethrough and engaging the ring whereby rotation of one bracket will revolve the ring and thereby rotate all the other brackets, notched members secured to the support and adapted to yieldingly engage the arms respectively, and springs adapted to press the brackets radially of the motor axis to hold the arms in engagement .with the notched members.
4. In a ceiling fan, the improvement comprising the combination of a ring revolvably mounted on a support, which is carried by a motor armature, concentric with the motor axis, a plurality of blade brackets pivotally mounted on the support with axes radial to the 'motor axis, permanent spur connections between the ring and the brackets, whereby rotation of one bracket will revolve the ring thereby rotating all the other brackets simultaneously, springs adapted to press the brackets upwardly on their pivots, and abutments unitary with the support and positioned and adapted to engage and hold vthe brackets in'selected positions when pressed downwardly by said springs.
5. `In a ceiling fan, the improvement comprising the combination of a support,.carried by the motor armature, a pivot secured vto the support and extending radially to the motor axes, a blade bracket mounted on the pivot, a spring arranged and adapted to press'the bracket outwardly on its pivot, a yoke secured to the support adjacent the pivot and having bevelled notches on its inner surface, and an arm secured to the bracket and adapted to yieldingly engage the notches when the bracket is pressed outwardly by the spring.
I-mRBERT I; lFNCI-I. e LAWRENCE M. PERSONS.