US1472124A - Air-heating attachment for fans - Google Patents

Description

Oct. 30 1923. Y

F. M. HOWE ET'AL AIR HEATING ATTACHMENT FOR FANS Filed Dec. 21. l92l\ 2 Sheets-Sheet 1 a f 9 J 1 1 i Fi Sum/"06 FRHNK MUREFIN Haws v g?how/Rmflaw/15m./

Oct. 30 1923. 1,472,124

F. M. HOWE ET AL AIR HEATING ATTACHMENT FOR. FANS Filed Dec. 21. 1921 2 Sheets-Sheet 2 9 FRfiN/(MUREHN How:

18 20 3 QHQM w Q a, F 1g. 1 is an elevation partly in section Patented Oct. 30, 1923.

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Application filed December 21, 1921. Serial Io. 528,905.

To all whom it may concern:

Be it known that we, FRANK MORGAN- Hown and Cmnnns Nassau, both citizens of the United States, residing in the city,

. a county, and State of New York, and in Long Island City, county of Queens, .State of New York, respectively, have invented certain new and useful Improvements in Air-Heating Attachments for Fans, of which thefol- 1o lowing is a full, true, andv accurate description. l I

Our invention relates to an electric attachment for heating air and has as certain of its objects the provision. of an attach- 1s ment which is convenient in use and which will provide a comparatively concentrated current of warm air. The novel features of our invention are pointed out with particularity in the appended! claims. The invention itself, however, ,with further objects and advantages, will best be understood from theifollowingdescription taken in connection with the accompanying drawing in which illustrating a heatin attachment according to our'invention app led to aim of ordinary type. l Fig.12-js a .front view of the apparatus shown'in-Fig. 1. I Fig. 3 is an elevation of the attachment illustrated in Figs. 1 and 2 as it appears when Y deta'ched from the fan.

Fig- 4 is a detail of the electrical connections for the heatin element of the attachment illustrated in i'gs. 1, 2 and 3.

Fi 5 is a detail of the means for supporting t e heatin element of the attachment illustrated in igs. 1, 2 and 3.

, Figs. 6 and? are details of modified forms of center shields which may be substituted, according to oiir invention, for the shield illustrated in Figs. 1,2 and 3.

In the drawing 1 is an electric fan which may be of any known or desired type for use in oflices or household] uarters. Fans of this t e are, as is well own, ordinarily provi ed'with a wire, cage or shield 2 to protett persons and ob'ects rom comin' in con- .with, the fan b ades 3, 3 when t e fan is use. Shields 2 ordinarlly comprise a rear ring 2! in a plane at right angles to the axis of revolution of the fanblades and the front ring 2" spaced from the ring 2' and held in a 2 plane parallel to that of ring 2 by means of braces or connecting wires 4.

An attachment according'to our invent on comprises a cylinder .5, the rear portron 5 of which is adapted to fit closely over the outside of the ring 2", cylinder 5 having internal shoulder 5 which limits the movement of cylinder 5 on the ring 2". Sei cured to cylinder 5, at points 6, 6 are a plurality of coil springs 7, 7 ,-'-the free ends of which are formed into hooks 8, 8 adapted to be passed over the rear ring 2 of the .shield or guard 2, as illustrated in Fig. 1,

and when the parts are-in this position, the

heating attachment is securely but removably held on the shield or guard 2. 'Supported by the cylinder 5 and extending forwardly therefrom is a hemispherical frame work 9 of wire or similar material. Supportedon frame work 9 is a ring 10 of sheet metal or the like designed to support a heating coil 11 and we prefer to make the ring 10 of frusto conical form in order to con- 2 centrate the air from the fan into a stream of convenient cross-section. {The heating co1l or element 11 is conveniently disposed within the, support 10 in an annular arrangement, being held at'intervals by heat resistant insulating members .12, 12 which are secured to the band 10 by means of screws 13 or other convenient means, the

supports-.12 preferably having apertures -i Heating element 11v may be threaded. As

clearly appears in. Figs. 1' and 2 the wire of element 11 is coiled helically' in order to proyide-a large length of wire and obtain resistance for 'use'on an ordinary lighting circuit. We find that we may use for element 11 ordinary resistance wire of about No. 20 B. & S. gauge, and that this sized wire, when coiled as illustrated in Fig 2,

I 14,there in through whichthe wire of the fan, has substantially the form of a hollow cylinder, very little air coming oif from points near the ends and near the centers of the blades. Our experiments have shown further that, largelyfor this reason, a heating element having a generally cylindrical or annular arrangement is the only one giving reasonable efiiciencywith a commercially practical type of heater when used with the ordinary type of electric fan. However, when the heating element is placed in the flow of air from such ordinary type fan, the distribution of the airflow is disturbed to some extent by the heating element itself and it is therefore desirable to check the flow.

The ends of the heating element or coil 11 are brought out through the supporting member 10 by means of rods 17 extending through insulating blocks 18, 18, connection of the heating element 11 to the lead wires 19, 19 being made at points 20, 20.

Having thus described ourinvention, We claim: 1. A heating attachment for fans, comprising a heating element, a cylindrical member for supporting the attachment to rent of air flowing perpendicular to the plane of the ring, means for restricting the flow through the center of the heating element, and means for restricting the flow of air outside of said heating element.

3. An air heating attachment for fans comprising a heating element, a cylindrical member for supporting the attachment and to which said heating element is connected, said cylindrical member having an internal shoulder for limiting its movements with respect to an external support, and springs secured to said cylindrical member, said springs having hooks formed thereon for securing said cylindrical member-to a suport. r I. p FRANK MORGAN Howe."

CHARLES NAEG'ELI.

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