US2310772A

US2310772A - Plastic fan stand

Info

Publication number: US2310772A
Application number: US434749A
Authority: US
Inventors: Alfred F Fukal
Original assignee: WILLIAM W WELCH
Current assignee: WILLIAM W WELCH
Priority date: 1942-03-14
Filing date: 1942-03-14
Publication date: 1943-02-09
Anticipated expiration: 1960-02-09

Description

Feb. 9, 1943, A, F FUKAL 2,310,772

' PLASTIC FAN STAND l Filed March 14, 1942 l 2 Sheets-Sheet l 1) E Inventor @Horne-q Feb; 9, 1943i A. F. FUKAL 2,310,772

PLASTIC FAN STAND VFiled March 14, 1942 2 SheeLS-S-heei". 2

Inventor @Awa y Gttorneq Patented Feb. 9, 1943 PLASTIC FAN STAND 'Aurea F. Fmi, cincinnati, omo, assignmw William W.k Welch, Cincinnati, Ohio Application Maren 14, 1942, serial No. 434,149

(ci. 23o- 259) 14 Claims.

This invention relates to a fan stand assembly and Amore particularly to the stand structure per se.

This application my copending application Serial No. 403,702 led July 23, 1941, for Plastic fan stand.

An object of this invention is to provide a standfor an electric fan that is made from a plurality of units molded from plastic molding material.

Another object of this invention is to provide a fan stand made from a plurality of stacked molded pieces.V y.

Another object of this invention is to provide a plurality of molded members forming a fan guard surrounding the fan blades.

Another object of this invention is to provide a fan stand having a derlecting cone wherein the deilecting cone forms an interlocking member for holding parts together.

Another object of this -invention is to provide a molded base for supporting the electric motor and for supporting the guard assembly.

Another object of this invention is to provide a molded base for the fan stand, wherein Vthe guard may be removed from the base without the removal of the electric motor supported thereon. Another object of. this invention is to provide a base having clearance for the iiow of the air lstream propelled by the electric fan.

Another object of this invention is to provide a base that supports the electrical equipment independentlyof the guard assembly and the d eiiecting cone.

Another object of this invention is to provide relates to the disclosure in a base provided with ornamentation, wherein the ornamentation harmonizes with the appearance of the balance of the fan stand. j

Another object of this invention is to provide a molded base -functioning as a support for the electric motor, which base is provided with clearance for the circulation of air, said base being provided with a support for the speed control coil.

Other objects and advantagesk reside in the construction of parts, the'combination thereof and the mode of operation, as will become more apparent from the following description.

In the drawings,

Figure l discloses a perspective view of the fan stand assembly, with parts broken away for the sake of clearance.

Figure 2 is a vertical cross sectional view of the stand assembly shown in Figure 1.

Figure 3 is a top plan view of one of the rings or hoops use'dln the isn assembly shown in Fl'gures 1 and 2.

Figure 4 is a cross sectional view taken on the 'lineI-llofFlgureZi.

Figure l5 is a perspective view of the base, drawn to a smaller scale than that used in Figures1to4. l l 'A Figure 6 isa side elevational view of the base.' with parts broken away andthe electric fan and its motor mounted thereon. f

Figure 'l is a fragmentary cross sectional view taken substantiallyl on the `linee |-1 of Figure 6.' Figure 'l is drawn to a larger scale'than Figure 6. y

Figure 8 is an.enlarged fragmentary cross sectional view taken substantially on the lin r8--8 of Figure 6. k

Figure 9 is an enlarged fragmentary view taken substantially on the line 9-,9 of Figure 1.

Figure 10 is an enlargedfragmentary view of A the juncture ,between the top deflecting cone and a few of the rings or hoops, as shown near the 'top of Figure 2. i

Figure 11 shows a perspective view of a spacer.

In the fan stand assembly shown in the above identified copending application vfor United States Letters Patent Serial No. 403,702, a base is used, which base forms practically a solid bottom 'underlying the 'guard assembly and the motor. In order to provide proper clearance'v for the free flow of air to be circulated by the fan,

another base has been provided for this guard assembly, as will appear more fully from .the description of the fan stand assembly'that follows.

'Ihis base supports the motor and theelectrical controls independently of the guard assem-l bly, the deflectlng cone andthe top, so thatthe motor and the electrical equipment may be assembled on the base as a complete unit. After the motor and the electrical controls therefor have been mounted in position, the guard assembly, the deilecting cone and the top may be mounted in position on the base. Inthe event it is found necessary to service the motor and the electrical controls, the guardpthe deilecting cone and the topmay be removed as a unit/from 'the base, leaving the motor and the electrical controis exposed for service, as will appear more fully from the detailed description that-follows. However', before describingthe base, a `brief description will be made of the guard assembly, the deiiecting cone and the top. i

Referring to the drawings, the reference character Il) indicates a table top.. In the preferred embodiment this table top is substantially round.

It has been shown round for thepurpose of illustration; but it could be oval, rectangular, square, polygonal or any other suitable shape. The margins Ilav are curved downwardly and are somewhat thicker than the main body portion, so as to give the table top rigidity. At spaced intervals the table top is provided with hollow bosses Ib. Furthermore, the under side may be reenforced by ribs or flanges, ii.' so desired. When a three legged base is used, the top is preferably provided with three bosses, as will appear more fully later.

A cone member I I is mounted underneath the top III. This cone is provided with a peripheral lip IIa, snugly seated within the marginal bead lua of the top I0. The cone is also provided with a plurality of pairs of bosses IIb, which will be described more fully later.

When a round table top is used, the guard as-'A sembly includes a plurality of hoops or rings I2. These rings are preferably tear-drop shaped in cross sectional area. Furthermore, the longitudinal axis of the transverse cross sectional area is aligned with the general direction of air currents emerging from the fan blades I4, which will be described more fully later. 'Ihis has been done to reduce the air resistance.- Each of the rings is provided with a plurality of spacing and supporting bosses or projections I9. These bosses I6 are located in spaced relation from the margins of the rings I2. The cross sectional area. of these bosses is substantially tear-shaped, again, to reduce resistance to air currents. The longitudinal axis of eachprojection is substantially radially disposedwith respect to the fan blades. Each of the bosses I6 is provided with a hole or aperture I8, through which extend retaining bolts or rods 29 'and 2I.

The four hoops lying above the neutral plane of the fan blades are positioned so as to accommodate the air stream directed upwardlyl and outwardly, so as to have a substantially conical pattern. 'I'he hoops below the plane of thefan have been reversed, so as to provide low resistance to the air currents drawn upwardly towards the fan. 'Ihe upper hoops and the lower hoops are identical, as far as the shape is conassembly. The base or annular portion 42 is supported upon a plurality of radially disposed downwardly looped leg portions, terminating in upwardly directed guard supporting portions, said leg portions including a downwardly extending portion 60 merging into a flat floor engaging base portion 62 terminating in an upwardly directed channel portion 64, provided with suitable ea'rs 66, forming supports for the projections. IG of the hoops. I2. Each ear 6B is provided with a suitable opening 68 registering with the apertures I8 in the hoops I2. A pair of flanges 61, integral with the upwardly extending portion 60, provide reeniorcing supports for the ears 66. In order to reenforce each leg portion 6I! and the dat base portion 62, these have been 'provided with radially disposed ribs 10, which,

cerned; but the angle of inclination of the upper A hoops is opposite to the angle of inclination of the lower hoops. This permits identical hoops being utilized above and below the fan blades. By this arrangement, the efciency of the fan is increased, without increasing the cost of the fan stand assembly. As a matter of fact, it is cheaper to use the same type of hoops above and below the plane of the fan than it would be to use diierent types of hoops,V in that the same molds may be used in molding all of the hoops.

In` the preferred embodiment eleven (ll) rings I2 have been used. Each ring is provided with six bosses or projections I6 arranged in pairs, there being three equally spaced pairs of bosses. There is one pair of bosses for each leg of the base. If a, four legged base is used, there would preferably be four pairs of bosses IB.

The rings I2, forming the guard for the fan blades I4, are supported upon a base 4I). The base 40includes a centrally disposed annular, motor'supporting base or annular portion 42. This centrally disposed motor supporting base 42 is provided with a plurality of holes 44' receiving retaining bolts 46, having mounted thereon rubber snubbers 48 for bolting the motor 50 in position. The snubbers absorb motor vibrations. so as to eliminate these from the fan stand for convenience, have been arranged in pairs, there being one pair foreach leg portion. The upper portion of the channel-shaped upwardly directed support 64 is provided with an upwardly directed arcuate flange 12, projecting under the lower ring or hoop I2, so as to eliminate light beams passing between the lower hoop and the top of the upwardly directed portion 60.

One of the upwardly directed channel portions 64 has been provided with an aperture Il receiving a stubshaft 92 of a switch contacting several terminals of a coil A84, which coil is held in position by suitable screws 86 in the side of one channel portion 64. Thel coil 84 is provided with suitable taps for varying .the speed of the motor, as is well known to those skilled in the art. The radially disposed downwardly looped leg portions are arranged to provide an air circulatm passage between the downwardly extending portion 90, the base portion 52 and the upwardly directed portion 64. This permits the free flow of air from the floor upwardly through the fan and outwardly through the upper hoops.

The stub shaft 82. supports a suitable control knob or switch button 90. having suitable indicia thereon for indicating the various speeds and the "o" position. From this it may be clearly seen that the motor, the switch, the coil 84 and all electrical parts are supported on the base 49, independently of the guard assembly, the deilecting cone and the top.

Method of assembly The motor, the coil and the switch are assembled on the base so as to form a unit consisting of the base, the electric fan and the controls' therefor. The cone'member Il and the hoops I2 are assembled and three rods 29 passed through registering apertures in the hoops and in the bosses of the cone member. There is preferably one bolt for each pair of bosses corresponding to leg portions oi the base. These bolts may be extended through the apertures in the corresponding ears in the base portion and secured in position by

suitable nuts

92 and 94. 'I'he upper nut 92, as shown in Figure 10, is preferably some type of nut made from spring metal and adapted to be pushed into position. When seated in position, it locks itself, so that it cannot be removed without unscrewing. The lower nut 94 may be any conventional nut, threadedly engaging the lower end of the bolt 20. T'hese three bolts, one

for each of the leg portions, cooperate to hold the base, thehoops and the cone member together as a sub-assembly. The top, which is provided with three equally spaced bosses, is then mounted in position with the apertures in the Nuts 94 are placed on the bottom of the bolts.

The bolts 20 and 2| are used in holding the assembly together, three of which engage the top and the other three only hold the cone, hoops and' base together,

As explained above, in the event it is lfound necessary to service the motor or any of the electrical parts, or to tighten, adjust or replace the fan blades, this may be done by merely removing the nuts engaging the ends of the bolts 20,- lifting the hoops and the parts supported thereby away from the base, leaving the electrical parts, together with the fan, exposed for service.

As far as the shape of the hoops, the arrangement of the defiecting cone and the top is `concerned, this is immaterial, as far as the base assembly is concerned.

In order to increase the eiilciency of the fan assembly, it may be desirable to increase the space between one or more pairs of hoops. s as to increase the air passage to thereby increase the ow of air current. In Figure l1 a tearshaped spacer |00 of substantially the same shape as the extensions I0 has been shown. This spacer is constructed to be mounted in registry with selected extensions or projections I6. This erally stated consist in a device capable of carrying out the objects set forth, as disclosed and delined in the appended claims.

vHaving thus described my invention, I daim; l. A base for a fan stand assembly having a motor and a 'guard consisting of a stack of hoops,

` said base including la centrally disposed annular motor supporting portion, said motor upporting I portion having a plurality of equally paced leg portions integral therewith, each of said leg portions merging into a floor engaging portion being radially disposed with respect to said annular portion and terminating in an upwardly directed channel portion forming a support for the hoops,- said upwardly directed channel portion being arranged in spaced relation from the motor supporting portion so as to form an air circulating passage.

2. A base for a fan stand assembly having a motor and a guard consisting of a stack of hoops, said base including a centrally disposed annular motor supporting portion, said motor supporting portion being Aprovided with radially disposed downwardly looped leg portions terminating in an upwardly directed guard supporting portion arranged in spaced relation from the motor supspacer is provided with an aperture |02 registering with the apertures through the projections Due to the fact thatthe spacer |00 is not secured to one of the hoops, it has been provided with a stud-like boss |04 adapted to be inserted in a recess in the adjacent projection I6. This stud-like boss |04 cooperates with the rod 20 or 2|, as the case may be, to hold the spacer |00 aligned with the adjacent tear-shaped projection I6. In the manufacture of the rings, each of the projections I6 is preferably provided with a recess adapted to receive the stud-like boss |04. By this arrangement it is not necessary to prepare the hoops adjacent the spacers in` a special manner, as for example, by drilling holes, in that if all of the hoops are provided with such holes, then any hoop may be used in association with the spacer. There areas many spacers as pro- `iections I6 on one hoop. If each hoop contains 6 projections, 6 spacers may be used.

For most purposes spacers will be placed only between t-wo adjacent rings, which rings are positioned at the location of maximum air intake.

the top of the assembly, the spacers are placed.

between the fourth and fifth hoops. If the maximum intake is between the third and fourth hoops, the spacers would be placed there. If the maximum intake is found at some other position throughout the height of the guard, the spacers are inserted atsuch a position. The use of the spacers is optional, depending entirely upon the eficiency of the assembly and the function thereof,

Although the preferred modification of the devic'e has been disclosed, it will be understood that within the y purview of this invention various changes may be made in the form, details,'pro portion andarrangement of parts, the combination thereof and mode of operation, which genporting portion so as to provide an air circulating pasage.

3. A base for a fan stand assembly having a motor and a guard consisting of a stack of hoops, said base including a centrally disposed annular `motor supporting portion, said motor supporting portion being provided with radially disposed downwardly looped leg portions terminating in an upwardly directed channel portion provided with a pair of ears for supporting the guard, said ears being arranged in spaced relation from the annular motor supporting portion so as to provide an air circulating passage.

4. In a fan stand assembly, the combination of a top and a guard assembly consisting of a. plurality of hoops stacked upon each other and held in aligned relation by retaining means, withr a base having a motor supporting portion for.

supporting the electric motor of a, fan, said base portion including a plurality of downwardly disposed leg portions terminating in upwardly directed guard portions, and means for removably attaching the 'guard assembly and the top to said upwardly directed portions, said guard assembly being removably mounted to permit servicing of the motor without disconnecting the motor from the base.

5. In a fan stand assembly, the combination of a top and a guard assembly consisting of a plurality of hoops stacked upon each other and heldin aligned relation by retaining means, with a base including an annular portion for supporting the motor in spaced relation from the oor, said annular portion being integral with a plurality of downwardly disposed looped portions,

each of said looped portions including a downwardly directed portion extending from the base merging into a radially disposed floor engaging motor supportingbase, said' motor supporting base including an annular portion arranged in spaced relation from the oor, said annular lportion supporting an electric motor, a plurality of downwardly extending leg portions integral with said annular portion, said leg portions merging into radially disposed oor engaging portions terminating in upwardly directed guard supporting portions, said guard supporting portions including ears for removably supporting the guard assembly, and means for removably attaching the guard assembly to said ears-so as to permit removal of the guard assembly from the base without removal of the motor for servicing the motor;

7. In a fan stand assembly, the combination of a top and a guard assembly consisting of a plurality of hoops stacked upon each other and held in aligned relation by retaining means, with a base for supporting the electric fan and the guard assembly, said base including a motor supporting portion having mounted thereon a motor for the fan, said motor supporting portion merging into a plurality of equally spaced leg portions extending downwardly so as to support the motor supporting portion in spaced relation -from the floor, said downwardly extending 'leg portions being provided with reenforcing ribs and merging into a ribbed base portion terminating in an upwardly directed guard supporting portion for removably supporting the guard assembly, and means for removably attaching. the guard assembly to said upwardlyl directed portions to permit the removal of the guard assembly from the base portion without the removal of the motor to permit servicing of the motor while mounted on the base portion. A

8. In a fan stand assembly, the combination of a top and a guard assembly consisting of a pluralityv of hoops stacked upon each other and held in aligned relation by retaining means, with a supporting base including a motor supporting portion arranged in spaced relation-from the oor for supporting the electric motor, and a plurality of legs integral with the motor supporting portion, each of said legs being directed downwardly for engagement with the oor so as to support the motor in spaced relation from the floor, said legs including a guard assembly supporting portion, the legs being provided with air passages for the flow of air upwardly around the motor.

9. In a fan stand assembly, the combination of a top and a guard assembly consisting of a,plu rality of hoops stacked upon each other and held in aligned relation by retaining means, with a motor supporting base, said motor Supporting base including an annular portion arranged in spaced relation from the floor, said annular portion supporting an electric motor, a plurality of downwardly extending leg portions integral with said annular portion,l said leg portions merging into radially disposed iloor engaging portions terminating in upwardly directed guard supporting portions, said guard supporting portions including ears for removably supporting the guard assembly, means for removably attaching the guard assembly to said ears so as to permit removal of the guard assembly from the base without removal of the motor for servicing the same, and switching means for controlling the motor mounted upon the upwardly directed guard supporting portion of one of the legs.

10. A fan stand assembly including an annular top member having an arcuate marginal portion terminating in a bead-like ring, a plurality of bosses including threaded inserts embedded therein, a plurality of hoops stacked upon each other and forming a support for the top, said hoops having aligned projections provided with apertures registering with each other and some of the apertures registeringwith the threaded insert in the top, said projections on the hoops being arranged in spaced relation from the outer margin o1' the hoops so as to be partially concealed thereby, a base assembly provided with supporting means for rsupporting the hoops, said base assembly having apertures registering with the apertures in the projections, and retaining means extending through the' apertures and threadedlyengaging the threaded inserts in the bosses for holding the assembly together as a unit.

ll. A fan stand assembly including an annular top member having an arcuate marginal portion terminating in a beadlike ring, a plurality of bosses including threaded inserts embedded therein, a conical member mounted underneath the top, said conical member having `a bead-like marginal portion nestled underneath the arcuate marginal portion of the top, said conical member having a plurality of apertured bosses, some of which bosses register with the bosses on the top member, a plurality of hoops stacked upon each other and forming a support for the conical member and the top, said hoops having aligned projections provided with apertures registering with each other and some of the apertures registering with the threaded insert in the top, said projections on the hoops being arranged in spaced relation from the` outer margin of the hoops so as to be partially concealed thereby, a base assembly provided with supporting means for supporting vthe hoops, said base assembly having apertures registering with the apertures in the projections, and retaining means extending through the apertures and threadedly engaging the threaded inserts in the bosses for holding the assembly together as a unit.

12. A fan stand assembly including an annular top member having an arcuate marginal portion terminating in a bead-like ring, a plurality of bosses including threaded inserts embedded therein, a conical member mounted underneath the top, said conical member having a bead-like marginal portion nestled underneath the arcuate marginal portion of the top, said conical member having a plurality of apertured bosses, some of which register with the bosses on the top member, a plurality of hoops stacked upon each other and forming a support for the conical member and the top, said hoops having aligned projections provided with apertures registering 4with each other and some of the apertures registering with the threaded inserts in the top, said projections on the hoops being arranged in spaced relation from the outer margin of the hoops so as to be partially concealed thereby, a base assembly provided with supporting means for supporting the hoops, said base assembly having apertures registering with the apertures in the projections, and a plurality of retaining rods some of which threadedly engage the inserts in the bosses of the top for holding the top, cone, hoops and base in a unitary structure and the remaining rods extending through the remaining apertures in the cone, hoops and base for holding the cone, hoops and base as a unitary structure.

13. A fan stand assembly including an annular top member having an arcuate marginal portion terminating in a bead-like ring, a plurality of bosses including threaded inserts embedded therein, a plurality of hoops stacked upon each other and forming a support for the top, said hoops having aligned projections provided with apertures registering with each other and some of the apertures registering with the threaded inserts in the top, said projections on the hoops being arranged in spaced relation from the outer margin of the hoops so as to be partially concealed thereby, said hoops having a substantially tear-drop shaped cross sectional area with the longitudinal axis ofthe cross sectional area forming an acute angle with the maximum diameter of the hoops, some of the hoops having the longitudinal axis extending substantially parallel to corresponding elements of the conical member, the remaining hoops being iriverted, a base assembly provided with supporting means for supporting the hoops, said base assembly having apertures registering with the apertures in the projections, and retaining means extending through the apertures and threadedly engaging the threaded inserts in the bosses for holding the assembly together as a unit.

14. A fan stand assembly including an annular top member having an arcuate marginal portion terminating in a bead-like ring, a plurality of bosses including threaded inserts embedded therein, a conical member mounted underneath soy , the top, said conical member having a bead-like marginal portion nestled underneath the arcuate marginal portion of the top, said conical member having a plurality of apertured bosses, some of which register with the bosses on the top member, a, plurality of hoops stacked upon each other and forming a support for the conical member and the top, said hoops having aligned projections provided with apertures registering with each other and some of the apertures registering with the threaded inserts in the top, said projections on the hoops being arranged in spaced relation from the outer margin of the hoops so as to be partially concealed thereby,

said hoops vhaving a substantially tear-dropv with supporting means for supporting the hoops,

said base assembly having apertures registering with the apertures in the projections, and retaining means extending through the apertures and threadedly engaging the threaded inserts in the bosses for holding the assembly together as a unit.

ALFRED F. FUKAL.