US2046511A - Fan motor support - Google Patents

Description

y 1936. E. F. GUTH FAN MOTOR SUPPORT 2 Sheets-Sheet l- Filed March 20, 1934 INVENTOR Maw ORNEY July 7, 1936. E. F. GUTH FAN MOTOR SUPPORT Filed March 20, 1954 2 Sheets-Sheet 2 INVENTOR W a M BY in/W TORNEY Patented July 7, 1936 oFFicE 2 Claims.

My invention relates to motors which are employed to rotate so called ceiling fans which are frequently used in connection with lighting fixtures.

In use various objectionable features have been observed unless some form of cushioning device is employed, the vibrations of the motor are transmitted to the ceiling causing a disagreeable noise in the room above. This has been overcome by providing a vertically yieldable spring support.

Another objection is that the motor vibrations due to starting torque and running, are transmitted to the lamps in the lighting fixture. Thus it has the result of greatly shortening the life of the lamps.

My invention has for its principal object to provide a fan motor support which will absorb all internal and external vibrations thus protecting the fixture and insuring longer life of the lamps.

A further object is to provide convenient means for mounting the electric lamp sockets on the frame of the fan motor support.

A further object is to so construct my fan motor support that if it breaks the motor will not fall.

My means of accomplishing the foregoing objects may be more readily understood by having reference to the accompanying drawings which are hereunto annexed and are a part of this specification, in which- Fig. 1 is a top or plan view of my improved fan motor support;

05 Fig. 2 is a side elevation;

Fig. 3 is a plan view of a modified form in which a single spring is used; and

Fig. 4 is a vertical sectional View of the same.

Similar reference numerals refer to similar parts throughout the entire description.

As shown in the drawings, a stem I may be secured to a standard outlet box (not shown) in the usual manner, the lower end 3 of the stem l is threaded onto a central hub 4 as shown in Fig. 2 formed on a frame 5 which carries my improved fan motor support and which may also, if desired, carry electric light sockets when a lighting fixture is combined with a fan. This frame 5 is provided with four receptacles 6, l,

8 and 9 which are adapted to receive conoidal coil springs iii. As these receptacles and springs are identical I shall only describe one of them. These springs ID are constructed so that each succeeding convolution will be smaller than the one below it yet its external diameter will be sufficiently greater than the one below it to prevent it from telescoping it. From the apex of each of the springs Ill depends a screw II, the head of which rests upon the top convolution. In some cases it may be found desirable to insert 5 a washer intermediate the head of the screw II and the apex of the spring ID. Each receptacle is provided with a central opening l3 at its bottom providing an inwardly extending flange 14 upon which the bottom convolution of the spring 10 Ill rests, the circular walls I5 of the receptacles abut the lower convolution or base of the conoidal springs It and serve to prevent any horizontal movement of the base of the spring ID. The lower portion of the screw II is, as clearly seen 15 in the sectional view, spaced from the edges of the inwardly extending flange l3 and the base of the spring IE! so that it is free to move horizontally in any direction, the end 16 of the screw I0 is screwed into the upper plate I! of the fan motor I8. It will be clear from the foregoing that the plurality of conoidal coil springs ID cushion the motor suspension screws ll while permitting them to move both vertically and horizontally thus efiectually absorbing the vibrations of the fan motor l8. If it is desired to combine the lighting fixture with the fan radially extending arms l9 may be cast or secured to the frame 5 and standard electric light sockets 20 may be secured thereto by means of screws 2| in the usual or customary manner.

It Will be seen from the foregoing description that should a spring break still the motor will not fall because the succeeding convolutions are formed of too large a diameter to go through the next lower coil so the screw would still be in place though the cushioning effect of the spring were destroyed.

It may, under some circumstances, be found desirable to employ a conoidal shaped elastic and compressible cushion formed of some other material than spring wire and I do not wish to be understood as limiting myself thereto except as such limitations appear in the claims.

As shown in Figs. 3 and 4, only a single spring 45 is used, this spring is mounted in a cup shaped receptacle 23 having an opening 24 in its bottom. The receptacle may be provided with arms 25,

26 and 2! for supporting the electric light sockets (not shown). In this case the receptacle is se- 50 cured to a bushing 28, which is screwed onto the stem by means of screws 30 which pass through the walls of the receptacle and into the bushing as clearly shown in Fig. 4. In this construction it is better to use a stud 3| provided 55 as new and desire to secure by Letters Patent is:

V 1. In. a fan motor suspension, the combination of a frame adapted to be attached to a ceiling, a vertical motor shaft located below the frame, the frame having a plurality of recesses located in concentric relation with the motor shaft, there being an opening in the bottom wall of each of said recesses, a conoidal spring mounted in each of said recesses, a screw'suspended from the apex of each spring, said screws extended through said openings and being spaced from the edges thereof and extended into the end plate of the motor.

2. In a fan motor suspension, the combination of a frame adapted to be attached to a ceiling, a vertical motor shaft located belowthe frame, the frame having a plurality of recesses located in concentric relation with the motor shaft, there being an opening in the bottom wall of each of said recesses, a conoidal spring mounted to each of said recesses, the lower coil abutting the walls of the recesses and thus being held against horizontal movement, a screw suspended from the apex of each spring, said screws extended through said openings and being spaced from the edges therein and extending into the end plate of the motor.

,EDWIN F. GUTH.

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