US1154115A

US1154115A - Electric heater.

Info

Publication number: US1154115A
Application number: US83844314A
Authority: US
Inventors: William S Hadaway Jr
Original assignee: Individual
Current assignee: Individual
Priority date: 1914-05-14
Filing date: 1914-05-14
Publication date: 1915-09-21
Anticipated expiration: 1932-09-21

Description

W. 3. HADAWAY, Jn

ELECTRIC HEATiR. 'APPucAnoea' FILED. MAY 14. m4.v

PatentedSept. 21, 1915.

2 SHEETS-SHEET I A TTOR/VEVS WIS. HADAWAY, 3R.

ELEGTRiC HEATER.

awucm'mm FILED MAY 14. 1914.

Pafent-edSept. 21, 191.5.

2 SHEETS-SHEET 24 rrnn s'rarns PATENT OFFICE.

WILLIAM S. HADAWAY, JR., OF NEW ROCHELLE, NEW YORK.

ELECTRIC HEATER.

means.

Specification of Letters Patent.

Application filed May 14, 1914. SerialNo. 838,443.

T all WJILOWL it may concern:

Be it known that I, VVILLIAM S. HADAWAY, Jr, a citizen of the United States of America, and a resident of New Rochelle, Westchester county, and State of New York, have invented. certain new and useful Improvements in Electric Heaters, of which the following is a specification, reference to correspond to Fig. 3, is shown on a larger scale in Fig. 4. Figs. and 6 are sectional details corresponding in scale to Fig. 4, taken respectively on the lines 5-5 and 6-6 of Fig. 1. Fig. 7 is adetail plan view of the top and auxiliary bus bars. Fig. 8 is a diagrammatic view of the resistance coils of being had to the accompanying drawings, which the heater units are comprised and forming apart thereof.

My invention relates to electric heating appliances and particularly to air heaters or stoves such as are adapted to be used on ocean steaniships or the like.

One object of my invention is to provide a simple and durable heater of the aforesaid character that shall be relatively inexpensive to construct and have an inclosing and protecting casing by which it may be secured either to a horizontal or a vertical surface.

Another object is to provide an improved, well-balanced heater structure which shall embody a plurality of interchangeable heater units and current conducting busbars arranged to mechanically support as well as electrically connect the units. v Still another object is to provide a duplex heater unit that shall be specially. adapted for use with astructure having the above named characteristics and be so arranged that suitable electrical connections between units are automatically effected when the units are bolted in position in the casing structure.

Other objects and advantages of my in-.

vention will be set forth hereinafter, and in order that my invention may be thoroughly understood, I will now proceed to describe the same in the following specification and then point out the novel features thereof in appended claims.

Referring. to the drawings: Figure 1 is a sectional elevation looking at the front of the device, of an. electric heating appliance arranged andconstructed in accordance with my invention. Fig. 2 is an end elevation of the same device with the terminal boX shown in section. Fig. 3 is a transverse sectional elevation on the line 3-3 of Fig. 1. A secwhich' they form parts.

their circuit connections.

Like characters of reference designate corresponding parts in all the figures.

The structure illustrated comprises a pair of. spaced end members 10 and 11 joined by longitudinal bus-

bars

12 and 13, and a plurality of interchangeable heater units 25.

In addition to the end members 10 and 11 the casing comprises. a curved sheet metal back 14 which is secured at its respective ends to flanges 15 and 16 of the end mem' bers by any suitable means such as stove bolts 17, and a cover member 18 which is hinge-connected to the back at 19 and is pro vided with pivoted latch bolts 20. \Ving nuts 21 are mounted on the bolts which are arranged to cooperate in a well known manner with forked lug projections 22 of the back 14:.

The end members 10 and 11 are each provided with supports 28 having substantially square body portions and foot extensions which are adapted to rest on the floor or be secured to a vertical wall. The supports are secured in position by bolts 24; and may be either mounted adjacent to each other to constitute legs as shown in full lines in big. 2, or turned with their foot extensions projecting backwardly and secured one near the top and one near the bottom of the end member as shown in broken lines in Fig. 2. They are adapted in the latter arrangement to act as brackets by which the heater may be mounted on a vertical wall.

The bus-

bars

12 and 13 are located near the central plane of the device and are parallel to each other, one being near the top and one near the bottom of the frame of They are secured to and insulated from the endmembers of the frame, and suitable electrical connectional detail of one of the heater units drawn tions are established from them at one end i to a plurality of terminals 40. These ter and extend into a terminal box 41 as shown in Fig. 1. A cable outlet .42 is also secured to the end member 11 and opens into the terminal box. 4

Each of the heater units con'iprises a central sheet metal plate 26, resistance coil supports 2728 which are arranged in pairs and extend laterally outward from opposite sides of the plate as clearly shown in Fig. 3, and resistance coils 29 which are mounted on the supports as hereinafter explained.

As shown in detail in Fig. 3, the supports 27 are mounted in pairs and consist of angle strips having perforated arms 30,-which are clamped to the plate 26 on opposite sides thereof by a hollow rivet .31 but are electrically separated therefrom and from each other by insulating washers 82.

Each of the supports 27 is provided at its outer end with some suitable hooked ends which, as shown, are formed by making a pair of spaced notches 3G in the outer edge of the strip and bending the resulting central projection 37 into a downward hook, and the end projections 38 into upward hooks or vice versa.

The supports 28 are similarly formed and secured to the plate 26. They are however, preferably somewhat longer than the sup ports 27 and consequently when the resistance coils, which are arranged in a zigzag manner, are mounted on the supports they lie in planes which are c )rrespondingly inclined to the intermediate plate 26 as shown in Fi 3.

There are for each unit a pair of terminal supports 89 which correspond to the supports 27 and 28 except that instead of being provided with the hooked extensions they have a terminal bolt 3?). Adjacent to each of the supports 39, which are located at two of the. corners of the unit, is a conducting strip which extends upwardly as shown in Fig. 5 or downwardly as shown in Fig. 6, to a hollow rivet terminal Each of the rivets 31 and 34: is insulated from the plate 26 and extends through relatively large holes therein.

One set of the supports 28 are arranged as shown in Fig. l, each having a terminal bolt 89 for the purpose'of providing a cross connection between the resistance coils on one side of the plate and those on the opposite side.

By referring particularly to Figs. 1 and 3, it will be seenthat electrical connection is established from one of the terminal members 4O downwardly to the bus-bars 13. F ron'i-this bus-bar a circuit connection is established through a clamping stud and a conducting strip 38 arranged as shown in Fig. 5, to one of the supports 39. Securely affixed to this support is one end of a resistance conductor which is composed of a large number of coils 29 and extends from the terminal bolt 39 alternatively over the supports 27 and 28, it being connected at its opposite end to one of the supports 39 which is arranged as shown in Fig. -LL. Connection. is thus established through the unit to a similar terminal on the opposite side of the plate 26 and the resistance conductor continues in a similar manner backwardly and ends with the terminal 39 at the upper left-hand corner. This terminal is arranged as shown in Fig. (3 and establishes contact to the bus bar 12.

It is-evident that any number of units constructed in the aforesaid manner may be secured to the bus-bars and when bolted in position are automatically connected in multiple circuit relation. The bus-bars serve not only as current conductors but also as the sole support for the units and constitute elements of the frame which is completed by the end members 10 and 11.

In order to provide for more than one heat an auxiliary bus-bar 12 (see Fig. 7) is mounted in parallelism with the bus-bar 12,' to which it is secured by studs ,51 and 52. The stud 51 extends through. both bus-bars and establishes an electrical connection between the heater unit adjacent to the terminals and the bus-bar 12. It supports, but is insulated from, the bns-bar 12. The stud 52 is riveted or otherwise secured to the bar 12 near the opposite end and extends through a relatively large hole in the bar 12 from which it is suitably insulated. It establishes a connection from this bar to one terminal of the middle unit 25 of the group" Supply circuit conductors (30 and 61 are .re.

spectively connected to the terminals &0 and 10 the latter being also connected to the bus-bar 13. The bus-

bars

12 and 12" are respectively connected to the

terminals

40 and 40.

The

heater units

25 and 25 are connected across the bus-

bars

12 and 13, and the heater I unit 25 is connected across the bus-bars 12. and 13. With the aforesaid connections, if.

line terminal i0 is connected only to tel niinal 40" the unit 25 will be energized;- if it is connected only to terminal 40, units 25" and 25will be energized; and if it is con nected to both 40 and 40 all these units Will be supplied with energy. Conductors may be connected to each of the several terminalsand suitable switches located at a convenient point for varying the connections to govern the heat generated as hereinbefore setforth. The arrangement of the casing is such. that the cover 14 may readily be unfastened and swung open to permit the inspection or the removal and replacement of any of the units as desired.

Attention is directed to the fact that any of the units may be removed Without interrupting or disturbing the electrical connections established to the remaining units. Consequently, if any of the units is destroyed for any cause it 'doesnot interfere with the usefulness of the remaining units.

their Weight and permit the air to circulate through them. Furthermore, as indicated in Fig, 3, the heater may advantageously be provided with a heat reflector 65 which is clampedto the end member in any suitable manner.

It is evident that numerous structural va riations may be effected Without departing from the spirit and scope of my invention,- and I intend that only such limitations be imposed as are indicated in appended claims.

What I claim is:

1. A heating appliance comprising a pair of spaced elliptical end members, interposed parallel bus-bars secured to the end members and insulated therefrom, and heater units comprising fiat metal plates secured to and insulated from the bus-bars in the central longitudinal plane of the appliance, supports insulated from the plates and extending laterally from the surfaces thereof and resistance conductors extending in zigzag formation on each side of the plates, secured to the lateral supports thereon and electri cally connected to the bus-bars; and removable foot projections having square body portions adapted to be mounted near the top and bottom of the end member and to project' laterally therefrom to constitute supporting brackets for the appliance.

A lieating appliance comprising a pair of spaced end members in parallel planes interposed parallel bus-bars, and heater units comprising flat metal plates secured to and insulated from the bus-bars in the central longitudinal plane of the appliance, supports secured to and insulated from the plates and extending from opposite surfaces thereof, and resistance conductors extending in a zigzag for ation on each side of the plate secured to ,he lateral supports thereon and electrically connected to the bus-bars.

3. A heating appliance comprising a pair of spaced elliptical end members, interposed parallel bus-bars secured to the end members and insulated therefrom, and heater units comprising fiat metal plates secured to and insulated from the bus-bars in the central longitudinal plane of the appliance, supports insulated from the plates and extend- .cally connected to the busbars.

4. A heating appliance comprising a frame having a. pair of spaced end members and substantially parallel bus-bars mechanically connecting the end members, and a pinrality of heating units comprising a metal plate and resistance conductors supported on opposite sides of and insulated from the 1 plate, said plate being adapted to be remov- The plates 26 may be perforated to reduce ably secured and electrically connected to the busbars. Y Y

5. A heater unit comprising a metal plate, a plurality of supports comprising angle strips having one arm secured to the plate and one arm extending outwardly from the plate, hollow rivets securing the supports in pairs on opposite sides of the plate, and a resistance conductor carried by the supports and extending in a zigzag path on one side of the plate through one of the hollow rivets to the opposite side and in a zigzag path thereon.

6. A heater unit comprising a metal plate, a plurality of supports arranged in pairs and extending laterally from opposite sides thereof, a hollow clamping means for securing the supports to the plate, anda resistance conductor mounted on the supports and extending-from one side of the plate to the other through one of said hollow clamping means.

7. A heating appliance comprising a pair of spaced end'members, parallel bus-barsma chanigcally connecting the end members, and a plurality .of heater units removably secured andelectrically connected to the busbars, each of said end members of the frame having removable foot projections adapted to be mounted near the top and near the bot tom of the end member so as to project latorally from the appliance and constitute supporting brackets therefor. v

8. A heater unit comprising a plate, a plurality of supports comprising angle strips having one arm secured to the plate and one arm fashioned into reverse hooks plate, and secured to and insulated from my hand in the presence of two subscribing the plate by hollow insulated rivets, and 21 witnesses, this 12 day of May, 1914.

resistance conductor carried by said supporting strips and extending through one WILLIAM HADAWAY 5 of the hollow rivets and on brfih sides of the Witnesses:

plate. F. GRAVES,

In witness whereof, I have hereunto set ETHEL COHEN.