US2799763A

US2799763A - Electric baseboard heater

Info

Publication number: US2799763A
Authority: US
Publication date: 1957-07-16
Anticipated expiration: 1974-07-16

Description

W. W. HICKS ELECTRIC BASEBOARD HEATER `July 16, 1957 y 5 Sheets-Sheet 1 Filed Aug. 27, 1953 INVENTOR.

JMW/M Arroz/Veys.

I' 0,100A P1? 47 July 16, 1957 w. w. HlcKs 2,799,763

` Y ELECTRIC BASEBOARD HEATER Filed Aug. 27, 1953 3 Sheets-Sheet 5 JNyENToR. MUA/w /VSLEY Heks,

ErEcrnrc nxsaeoann rrEArEn William Wesley Hicks, San Francisco, Calif., assigner to Wesix Electric Heater Co., San Francisco, Caiit., a con poration of California Application August 27, 1953, Serial No. 376,872

12 Claims. (Cl. 219-54) This invention relates to provisions for electrically heating a room or space.

One manner in which such heating is effected involves the instalaltion of heating units in a hollow baseboard, simulating the conventional wood or metal trim at the base of the walls. Usually, the heating units are coils of resistance wire, extending longitudinally within'the baseboard and concealed by it. The units may extend either entirely around the lower edges of the walls of a room, or around a part only of the room perimeter, depending upon the heating requirements.v

It is one of the objects of this invention to improve in general such baseboard heaters.

In order to provide an etlicient and practical baseboard heater construction, it is essential that the exposed baseboard surface be kept at a temperature so that it mayretain paint for matching 'an individual room. Furthermore, it is essential, for esthetic purposes, to provide a4 neat, smooth appearance, free of crevices or indenta-4 or other effects that may be occasioned by excessive heat.

It is accordingly another object of this invention to obtain these advantages in a simple and effective manner.

It is still another object of this invention to provide air inlet and outle`t`openings such that they are left unobstructed by furniture.

It is still another object of this invention to ensure that the heating element is guarded by battles to` prevent contact with the fingers of an individual, or with bedding, such as sheets'and blankets. n

lt is still another object ot this invention` to ensure against air turbulence within the baseboard,v and thereby to ecct clear passages for the'air flow. In order toaccornplish this, the various' supports for the bales and for the heating elements are madeof relatively small or thin parts, presenting minimum obstruction to the flow of air.

It is still another object of thisinvention to provide a simple and effective manner of assembly of the bales and brackets, especially by interlocking elements requiring few fastening means.

It is still another object of this invention to provide a thermostat for automatically regulating the heating current and made a part of the baseboard structure.

When heaters of this general character are used, smudg` ing of the walls above the heater is often conspicuously produced. This smudging is due to precipitation of line dust particles on the wall surface, andV there are several Zfiggh Patented july i6, 1%57 contributions to such precipitation. It may be caused by air turbulence, and thermal or electrical precipitation.

lt is another object of this invention to overcome this smudging, and particularly by the aid of a secondary ow of relatively cool air, interposed between the wall and the llow of heated air.

In heating devices, temperature variations cause appreciable warping, expansion and contraction, creating annoying noises. It is another object of this invention to mount the longitudinal elements of the heater in such manner as to permit such expansion and contraction without any attendant warping and creation of noise.

It is still another object of this invention to provide illustrating the general principles of the invention; but it is to be understood that this detailed description is not to be taken in a limiting sense, since the scope of this invention is best defined by the appended claims.

Referring to the drawings: Figure l isa perspective view of a portion of a room in which a baseboard heater incorporating the invention v is installed;

Fig. 2 is a fragmentary front elevation of a heater unit, some of the elements being partly broken away;

Fig. 3 is a sectional view taken along a plane corresponding to line 3 3 of Fig. l; a portion of the length of the heating unit being omitted in order to reduce the size of the figure;

Fig. 4 is a similar sectional view taken along a plane corresponding to line 4 4 of Fig. 1;

Figs. 5 and 6 are enlarged sectional views taken along planes corresponding to lines 5-5 and 6-6 of Fig. 2;

Fig.4 7 is an enlarged sectional view taken along a plane corresponding to line 7-7 of Fig. l;

Fig. 8 is a sectional view taken along a plane corresponding to line 8-8 of Fig. 5; f

Fig. 9 is a fragmentary detail section-al View showing the manner in which the wall enclosure portions of adjacent units may be joined;

Fig. 10 is a pictorial view of one of the brackets utilized in supporting the bale and deflector elements of the heating unit; s

Fig. 1l is a detail sectional view taken along a plane corresponding to line ll-ll of Fig. 5; and

Fig. l2 is a detail `sectional view taken along a plane corresponding to line 12-12 of Fig. 6; and

Figs. 13 and 14 are enlarged sectional views illustrating the manner in which the coiil supports may be mounted in lone of the longitudinal elements of the unit.

In the present instance the baseboard heater system is shown as extending along the bottom edge of the wall 1l (Fig. l) and around a corner of the room. Such a construction may extend around the entire perimeter of the room, exclusive of doorways, or may extend along only a portion of the perimeter, as required by the specific installation.

In the present instance, two heating units 2 and 3 are shown along the wall 1 and a portion of the unit 4 is indicated as extending along another wall of the room. However, as many connected units may be used as required.

A wall enclosure or housings (Figs. 2, 3, 4, 5 and 6) serves as the main support for substantially all of the elements of the heating unit. In the installation shown in Fig. 1, each of the heating units 2 and 3 is provided with such a wall enclosure 5, as shown more particularly in Fig. 4. This wall enclosure may be attached byV appropriate screws to studs 6, indicated in Fig. 3. As shown in Figs. 5 and 6, the plaster wall 7 may be removed in order to expose the studs 6 for the accommodation of the enclosure 5. Other means of providing a shallow recess within the wall may be utilized.

The enclosure 5 is preferably made of sheet metal. It has a forwardly and upwardly sloping portion 8 terminating in a vertical portion 9 and a rearwardly bent overhanging lip portion 10. This lip portion 10 is arranged to lie quite closely to the interior surface of the plaster wall 7.

The lower portion of the wall enclosure 5 has a horizontal end member or base 11 adapted to rest on or near the tioor 121. This portion 11 has an upright flange 12 at its forward edge. Y

The heating unit proper, which is supported by the aid of the wall enclosure 5, includes a baie member 13 and a deector member 14. These

members

13 and 14 extend horizontally and each has a length corresponding to the horizontal length of the enclosure 5. They are held in spaced apart relationship to form a warm air passage or path between them past a heating coil 15. This heating coil 15 is appropriately supported in the air space.

The manner in which the

members

13 and 14 are held in this spaced apart relationship will be described hereinafter. It is sutcient for the present to note that the baie 13 is provided with a vertical central portion 16 and diverging

edge portions

17 and 18 to form a troughlike configuration. The upper edge portion 17 is formed with a vertical portion 19 provided with a horizontal ange 20. The lower portion 18 is provided with a lower edge iiange 21 adapted to overlie tlange 12 of the enclosure 5. The ange 21 may be attached as by the aid of screws 22 (see also Fig. 2) to the tlange 12. Only two such screws need be used, one adjacent each end of the member 13.

The member 13 is suspended by the aid of its ange 20 upon support members or bars 23. Three such support members may be used in connection with each unit and attached to the inner surface of the wall enclosure portion 8. Two of these may be disposed at opposite ends of the enclosure 5 and one near the central portion thereof.

Each of the supporting members 23 is provided with an upright portion 24 upon which the flange 2t! rests. Movement of the bale member 13 outwardly of the support members 23 is prevented by the aid of an abutment 25 attached to the lower surface of the flange 2).(see particularly Fig. 1l). Furthermore, the

members

5 and 13 are mounted in spaced apart relationship by the aid of a strut or flange member 26 which is attached as by welding to the interior of the closure 5 by the aid of the upright leg 27. This member 26 is formed with a depending eg 28.

In this manner a longitudinal conduit space 29 is formed between the

members

5 and 13, and adjacent the lower edge of the unit. This conduit space is provided with one or more openings 30 (Fig. 8) to permit the passage of conductors 31 into the conduit space 29. These conductors 31 are joined to the heating coil 15 as by the aid of a connector block 32.

By thus isolating the wires forming the connections to the heating units, standard insulated wiring can be used without lire hazard, since the conduit space 29 is quite well isolated and separated from the heat of the coil 15.

Furthermore, by suspending the member 13 upon the supports 23, relative longitudinal movement between the wall enclosure 5 and the heating unit proper, including the

members

13 and 14, is permitted. Thus substantial freedom is permitted for the expansion or contraction of the longitudinally extending elements forming the heating unit prop er.

As shown in Figs. 5 and 6, the upper edges of the

members

5 and 13 dene a cool air opening 33 directed toward the wall surface formed by the plaster 7. This opening thus extends upwardly and toward the rear of the bathe 13. Furthermore, the

elements

8 and 17 of the

members

5 and 13 define a path leading upwardly from the space between these two elements. Cool air ows through these spaces and is transmitted through the opening 33. This flow of air is indicated by arrows in Fig. 6. Thus air iiows above the lower diverging member 18 upwardly through openings formed by the louvre portions 34 in the vertical wall 16. The air thence flows upwardly between the

members

5 and 13 and ultimately outwardly out of the opening 33. This cool stream of air proceeds upwardly adjacent the wall surface 7, retarding or preventing precipitation of fine dust particles carried by the warmed air, which passes between the balTle 13 and the deflector 14.

The baie 13 and the deflector 14 are held in spaced -apart relationship by the aid of a plurality of brackets 35 (see Fig. 10). These brackets are shown also in Figs. 2, 3, 4, 5 and 6. They are made of at sheet metal. Five such brackets may be used for each unit.

' Each of the brackets has a contour fitting the troughshaped forwardly facing surface of the element 13. It is provided with a plurality of tongues 36 intertting in appropriate slots formed through the member 13. Accordingly, these brackets can be snapped into place by merely urging the brackets against the baffle 5. The resilience of the diverging

members

17 and 18 maintains the brackets in place.

The right-hand edge of each of the brackets 35 has a vertical portion 37 anddiverging portions 38 land 39. Extending at an angle with respect to the lower portion 39 is a slanting edge 40. The

edge portions

38 and 40 serve to support the deector 14 in a detachable manner. Thus the deector 14 includes the diverging

elements

41 and 42. The lower diverging element 42 rests against the surface 40. Diverging portion 41 is provided with an angled portion 43 which iits against the surface 38. A shoulder 44, formed on the bracket 35, engages the outer edge of the portion 43.

In order to install the deiiector 14, the diverging

portions

41 and 42 may be urged toward each other so as to permit insertion of

portions

42 and 43 against the

edge portions

40 and 38 of the bracket 15. It is thus snapped into place.

In order to position the deliector 14 properly a pair of ears 45 (Figs. 6 and 12) are struck up from the portion 43 of deector 14 to engage the central one of the brackets 35, as indicated in Fig. 6.

Interposed between one or more of the brackets 35, and edge 43, there is a thin layer of yielding material, for reducing noise attendant upon contraction and expansion of the detiector or bae members.

The brackets 35 are properly made thin so as not to obstruct the ow of air upwardly between the bathe 13 and the deector 14. The edge portion 17 of the bale 13 and the edge portion 43 of the deector 15 form a channel or passage for the heated air to pass upwardly, as indicated by the arrows in Fig. 6. This air passage is open both at the top and bottom since the lower edge of the detiec- `tor 14 is spaced away from the diverging member 18 of the baie 13. Furthermore, the edge portion 42 is provided with rectangular apertures 70 (Figs. 2 and 6) for passage of air past element 15.

Heated air thus rises upwardly through the opening 46 formed at the upper edge, between the baffle 13 and the deflector 14. v

Each of the brackets 35 is provided with an upwardly extending projection 47. This projection 47 can be received in a channel formed at the upper edge of a front cover plate 48. This channel is formed by the depending spaced tiange 49 formed on the cover plate 48. A corresponding horizontal ange 50 engages the lower edges of the horizontal projections 51 of the brackets 35.

Those brackets 35 which are adjacent the ends of the unit are provided with ears 52 (Figs. 2, 5 and 10) for accommodation of screws 53 for holding the cover plate 48 in position. These are the only fastening means required to provide a complete assembly.

The heating element 15 is formed of convoluted resistance wire strung lengthwise of the unit. In order to support this heating element in the warm air space dened by the bafiie 13 and deliector 14, a series of coil supports 54 is provided. These coil supports are mounted upon the deiiector 14 in a manner to be hereinafter described. They are formed of refractory material and include the spaced arms 55, 56 which define recesses for both reaches of the element 15. As shown most clearly in Figs. 3 and 8, alternate Asupports 54 are turned so that the arms 55, 56 extend upwardly and then downwardly. The looped portion of the heater 15, as shown most clearly in Fig. 3, is mounted upon a horizontally turned coil support 54.

Each of the coil supports 54 is mounted on the vertical wall of the deector 14 in a manner shown most clearly in Figs. 2, 5, 13 and 14. An aperture 57 of general rectangular configuration is formed in the deliector 14. ,From the vertical edges of this aperture project the integral projections or extensions 58. The length of these projections is somewhat less than the length of the aperture 57. These projections serve as resilient arms for engaging grooves 59 formed on opposite sides of the support 54. Accordingly, in order to insert the support 54 into operative position with respect to the deflector 14, it is merely necessary to urge the support 54 inwardly as indicated by the arrow 60 of Fig. 13. When this support 54 is urged inwardly to a position where the edges of the projections 58 engage the grooves 59, the support 54 is held effectively in place (Fig. 14). The upper and lower edges of aperture 57 restrain substantial vertical movement of the support 54.

When more than one unit 2 or 3 (Fig. 1) is installed in lengthwise relation, they may be joined by the aid of an alignment plate 61 (Fig. 9). This alignment plate joins adjacent wall enclosures 5 by the aid of fastening means 62 passing through slotted apertures in the alignment plate 61. Alignment plate 61 may have a flange or strut 63 corresponding to iiange 26 of the adjacent units. Furthermore, the supports 23 adjacent the congruent ends of the units may be joined by a bar 64.

The end of a series of heater units may be covered by the aid of an end member 65 (Figs. l, 2, 3 and 8). This end member 65 has a liange 66 (Fig. 3) by the aid of which it may be fastened to the wall enclosure 5.

Similarly a corner structure 67 (Figs. 1 and 4) may be utilized where two units, such as 3 and 4, meet at a corner. This corner structure is provided with appropriate anges 68 and 69 securing them to the adjacent wall enclosure 5. The corner structure includes a top plate 95 of general rectangular configuration. Appropriate apertures can be formed in the sides of the corner plate for the passage of connecting wires between adjacent heater sections.

Intermediate the heating units 2 and 3 is located a thermostatic switch section '71 (see particularly Figs. l and 7). This switch section 71 serves to accommodate a thermostatic switch mechanism 72 having an operating knob 73 projecting above the structure. This switch 72 is so arranged that it is subjected to the temperature of the circurnambient air near the floor of the room being heated, and inappreciably affected by the heat radiated from the heating elements 15.

For this purpose a wall enclosure section 74 is provided having generally the same contour as the wall enclosure sections 5. These wall enclosure sections may be joined as bythe aid of alignment plates 75 (Figs. 4 and 7), attached to the

members

5 and 74.

A frame member 76 is provided formed of sheet metal and mounted upon the well enclosure 74. The back wall of this frame element is sloping. It is provided with two flanges 77 forming a space for the accommodation of the S switch 72. yThis frame member 76 has a perforated horizontal flange 78 for circulation of air, as well as an aperture for the passage of the stem `79 of the switch 72.

A front cover plate 80 serves to enclose the switch 72. It is provided with the side iianges S1 for shielding the switch section from the heat of the adjacent units. The front plate 80 is supported by the aid of the vertical tiange v82 joined to the ear 85, formed on the shell 76. The side anges 81 are attached to the rear alignment plates 75.

The upper edge of the cover 80 has a conformation corresponding to the upper edge of the baie 13. Apertures 86 at the bottom of the cover 80 permit free circulation of air past the switch 72.

The structure of the heating units permits ready adaptation to any baseboard design. By virtue of the inwardly sloping portion 38 of deilector 14, and the location of the heating units below thediverging portion 41, danger of contact of any foreign material with heating coil 15 is obviated.

The units can be easily and simply assembled. In this assembly operation, the wall enclosure 5 is first installed. The previously assembled heating element 15, the baffle 13 and defiector 14 can then be attached to the wall enclosure 5.

Heating is effected not only by the aid of the warm current of air passing upwardly from the heater, but also by radiation from the front cover 48. This front cover is heated to some extent by its proximity to the deiiector V14 and element 15.

The inventor claims:

l. in a baseboard electric heater: a deflector; a bailie; means for maintaining said deflector and baiile in spacedapart relationship; a heating element supported within the space defined by the bafiie and the deflector; there being openings at the longitudinal opposed edges of the baffle and deiiector to provide communication between said space and the external air; and a wall enclosure supporting said baffle at the opposed edges of the said bafie; said wall enclosure having a wall spaced from the baie, to deiine a path for secondary air ow; said baffle having openings communicating with said space for passing air from the space into said path.

2. ln a baseboard heater unit: a barrel; a deflector made from resilient material; said dei'lector and baie defining an open air path between them; brackets for maintaining the baffle and deflector in spaced relationship; said deliector having an intermediate portion, an edge portion dening an air passage with the baliie, and an opposite edge portion, said edge portions being oblique to the intermediate portion; said brackets having edge surfaces facing the deiiector and contacting said deflector edge portions, said edge portions being sprung against satirl edge surfaces, said brackets having other surfaces restraining said deilector against removal; and a heater element supported by the deiiector in said space.

3. In a baseboard heater unit: a baiie; a deflector; said deiiector and baflie defining an open air path between them; brackets for maintaining the baiiie and deiiector in spaced relation; and a heater element supported in said path; the baiiie and deflector having spaced edges; said brackets having an upper edge extending beyond the deliector edge; and a front cover plate having a recess accommodating said upper edge.

in a baseboard heater unit: a bafiie, a deflector; said deiiector and baiile defining an open air path between them; brackets for maintaining the batiie and deflector in spaced relation; and a heater element supported in said path; the baie and deflector having spaced edges; said brackets having opposed edges extending beyond the deliector edges; and a front cover pla-te having a recess accommodating one of the bracket edges, and a flange at the opposite edge of the plate and engaging the other of the bracket edges.

5. In a baseboard heater unit: a baflie; a deflector; for supporting said baie and deflector in spaced relationship to dene an upper and a lower air passage 7 into the space between the deilector and the baille; a heater element supported in said space; and a wall enclosure spaced from the baille and having'an upper edge spaced below the upper edge of the bafe; said baille having openings leading into said space from below the heating element into the space formed between the enclosure and the baille; said upper edges dening an opening upwardly directed and to the rear of the baille.

6. In a baseboard heater unit: a baille; a deilector; means for supporting said baflle` and deilector in spaced relationship to deiine an upper and a lower air passage into the space between the deector and the baflle; a heater element supported in said space; and a wall enclosure spaced from the baille and having an upper edge spaced from the upper edge of the baille; said enclosure having a flange intermediate its height, contacting the baille and deiining a conduit space for connections for `the element, said conduit space being located at the lower portion of the space between the baille and the enclosure.

7. In a baseboard heater structure: a wall enclosure; and a longitudinal heating unit having a sheet metal enclosure; said unit having a baille, and means for supporting the baille upon the wall enclosure, including a support at the top upon which the upper edge of the baille rests, and means preventing lateral movement of the bae with respect to said support, while permitting longitudinal movement.

8. In a baseboard heater structure: a longitudinal heating unit having a front deector, a rear baille, and one or more brackets between the detlector and the baille, said brackets having an upper portion extending beyond the deilector; and a cover plate having a flange forming a groove in which said upper portion rests.

9. In a baseboard heater unit: a baille member; a deector member; said battle member being made from resilient material; spaced brackets interposed between the members, and having opposite edges respectively contacting said members for maintaining an air passage between the members, said passage extending transversely of the members; said baille member having divergent edge portions fitting corresponding edge surfaces of the brackets; the resilience of the baille member serving to restrict movement of the brackets in one direction; and means forming a restraint against relative movement transverse to said direction between the brackets and one of said members.

10. In a baseboard heater unit: a baille member; a deflector member; saidbale member being made from resilient material; spaced brackets interposed between the members, and having opposite edges respectively contacting said members for maintaining an airpassage between the members, said passage extending transversely of the members; said baille member having divergent edge portions fitting corresponding edge surfaces of the brackets; the resilience of the baille member serving to restrict movement of the brackets in lone direction; and tongue connections between one of the members and the brackets.

11. In a baseboard heater unit: a bafe member; a defiector member; said members being made of resilient material; spaced brackets interposed between the members, and having opposite edges respectively contacting said members for maintaining an air passage between the members, said passage extending transversely of the members; said members-having divergent edge portions iitting corresponding edge surfaces of the brackets; the resilience of the members serving to restrict movement of the brackets in one direction; and means restraining relative movement transverse to said direction, between the brackets and one of the members.

12. In a baseboard heater unit. a wall enclosure; a baille member spaced from the wall enclosure; a deilector member spaced from the baffle member; an electric heat- Ving element disposed between the members; said deilector and baille defining a through air passage; and an upwardly directed projection forming a continuation of the upper edge of the enclosure and inclined away from the baille member; said baille member having an edge spaced above said projection, and defining, with said projection, an air passage past said edges of the enclosure and the baille.

References Cited in the tile of this patent UNITED STATES PATENTS 1,651,890 Hicks Dec. 6, 1927 1,664,171 Hicks Mar. 27, 1928 1,705,769 Kercher Mar. 19, 1929 1,746,817 Campbell Feb. 11, 1930 2,443,449 Fry June 6, 1948 2,525,850 Anderson Oct. 17, 1950 2,606,992 MacDonald Aug. 12, 1952 2,619,578 Jepson Nov. 25, 1952 2,654,017 Hicks Sept. 29, 1953