US1511779A - Heating device - Google Patents

Description

Patented a. 14, 1924.

UNITED STATES 1,511,779 PATENT OFFICE.

aominr saannso w AND Joint 003833., or MINNEAPOLIS, minimum, assioxons TO I mmmw 50mm, or CHICAGO, ILLINOIS.

HEATING DEVICE. i

Application aim 0mm 3,1023. sci-mi no. 006,344.

To all whom it may concern? Be it known that we, Roaan'r Sannnson and JOHN Consnn, citizens of the United States, residents of Minneapolis, countyof Hennepin, and State of Minnesota, have invented certain new and useful Improvements in Heatin Devices, of which the following is a specification. v

a This invention relates more particularly to improvements in heating devices of the electrical type and includes means for obtaining a plurality of different heating values from the same unit. The selected embodiment of the invention herein shown is one specifically adapted for use with motor vehicles employing internal combustion enines and is employed to raise or maintain the temperature of the cooling medium, usually water, in the cooling system of the engines of this t While this device may be attached to ot er parts of such cooling systems, it is preferably secured to the engine block. Furthermore, the device 1s adapted for use with the usual commercial circuits. That. is, the electrical energy is preferably not taken from the usual storage 7 battery of vehicles but is supplied from the common commercial lines such as are usually found in' garages, private or public. While a number of different heats may be provided, the device is here shown as eapable of a high and a low heat. For example, the low heat may be turned on during a cold night to guard against freezing of the eoolin fluid, while the high heat may be turn on when it is desired to start the cooled engine or to overcome the effects of the engine havin been-left exposed to low tem ratures Wlfi'lOllt the advantage of 40 the heating device.

The object therefore of the invention is to provide a new and improved heating device. Other objects of the invention will more fully appear from the following description and the accompanying drawings and will be pointed out in the annexed claims.

In the accompanying drawings there has been disclosed a structure designed to carry out the objects of the invention, but it is to be understood that the invention is not confined to the exact features shown, as various changes may be made within the scope of the claims which follow.

In the drawings:

Figure 1 "s a view in internal combustion engine with the novel device installed and showing, in vertical section, a portion of the floor and dash or instrunient board;

Figure 2 isa vertical section through the heating chamber;

Figure 3 is a vertical section onthe line 3-3 ofv Figure-'2 with the addition, in vertical section, of the walls of the adjacent water-jacket portion of the cooling system;

Figure 4 is a view in front elevation of the switch mechanism as mounted upon a portion of .an instrument board;

Figure 5 is a vertical section on the line 5-5 of Figure 4;

Eigure 6- 'is a cross-section on the line 6-6 of Figure 4;

Figure 7 is a wiring diagram of the heating unit and sections; and

Figure 8 is a partial view of the opposite sides ofthe plug support to show the indicating means.

. In this embodiment of the invention there is provided a water chamber 8, formed by the casing -9, preferably of metal. This water chamber-casing, due to the novel features and mounting thereof, may be formed of a single integral casting. This castin is shown as secured tothe wall of the coo ing 85 system of an internal combustion engine and the casing is provided with one or more openings adapted to communicate with the interior of, the cooling system so that there may be circulation of the water to and from the heating chamber.

The novel form of securing this heating chamber to the walls of the cooling system not only assures a secure mounting but also provides the means for the" passage of the circulatory water to and from the heating chamber. As here shown, the casin 9 is provided with transversely enlarge portions 11. and 12. These are preferably disposed adjacent opposite ends of the casing and upon opposite sides of its median axis. Each enlarged portion has an opening in each of its opposite faces and these openings are alined for the reception of the securing means. Such securing means referably consists of a headed bolt 13 which is adapted to be passed through the alined openings in the casing and to extend side elevation of an through, and be received in threaded engagement within, the wall 14 of the cooling system. These bolts 13 effect a snug fit with the alined apertures in the casing and a packing washer 15 is preferably mserted between the bolt-head 16 and the ad acent outer face of the casing.

Communication is afforded between the cooling system and the heating chamber by means of these bolts. To that end each bolt is hollowed at its inner end and this recess 17 extends throughout its major portion but terminates short of the head of the bolt, as shown in Figure 3. Each bolt hasseveral openings 18 cut throu h it substantially at right an les to the b0 t, to afford free circulation tween the bolt recess and the interior of the heating chamber. These hollow bolts are two in number and secure the casing adjacent its opposite ends to the wall of the cooling system.

A heating unit of the electrical type is preferably employed within this heating chamber. One end of the heating chamber is formed with an integral neck 19, the outer face of which is threaded for reception of the similarl threaded cap 21. The annular head 22 of the heating unit snugly fits within the cap 21 and against the inwardly presented shoulder of the cap which holds the head against. outward movement when the cap 21 is screwed down. The cap 21 is apertured to permit passage of the sheath 23 of insulating material which carries the three wires of the heating unit.

The preferred form of heating unit consists of a base of insulating material in tubular form and preferably of asbestos. The heating wire 25 is coiled about this asbestos base and a second insulating covering is laid over the heating wires. The coverin preferably consists of layers 26 of mica.

metallic cylindrical shell 27, preferably of.

relatively thin brass, encloses the whole unit. This shell is closed at its inner end and its outer end effects a snug fit with the annular reduced portion 28 of the head 22. The outside diameter of the shell 27 is such that it makes a water-tight connection with the inner face of the neck 19 of the casin 9. Thus the water in the chamber 8 may be heated by the unit but can neither come into contact with the heating wire nor pass from the easing other than through the two circulatory passages provided bythe hollowed bolts.

This heating unit is adapted to provide a plurality of heats, such for example, as a high and a low heat. Thisprovision is simply eifected by employing a terminal connected to each end of the heating wire and with a third terminal connected to an intermediate rtion thereof. As is shown in the wiring iagram, Figure 7, these terminals ma be of any convenient form and they are eac shown as of a common type such as the contacts here shown are of the opposed finger type and the contacts 34 and 35 are of equal length and are greater than the relatively shorter contact 36.

The three plugs are mounted upon a laminated panel 37 formed of insulating material and providing an annular groove within which to receive the peripheral ofi'set flange 38 of the recessed plate 39 adapted to be screwed to the instrument-board 41. The two similar plugs are connected by the wires 42 and 43 to the ends of -the heating wire while the short plug 33 is connected by wire 44 to an intermediate portion of the heating wire. The finger contacts are preferably carried within the metallic insulated compartinents provided by the head 45. The three contacts, as well as the plugs, are preferably arranged in a straight line, and the shortfingered contact 36 is joined by the connector 46 to th middle long-fingered contact 35. A main line wire 47 connects the contact 34 with a uitable source of electric energy (not shown), while the other main line wire 48 leads to the contacts 35 and 36. The outer portion of the head, 45 is recessed and is closed by a cap 49 suitably secured to the head and apertured to ermit passage of the main l1ne wires 47 an 48. i

In the operative use of this device, the

high and low heats are obtained by a simple reversal of the connections. As the three plugs are shown as in relatively fixed sition, the change is made by reversal o the finger sockets or contacts. For example, when, the contacts are held in the position shown adjacent. the plugs in Figure 7, they maybe manually moved into en agement with the lugs. Such position wi 1 be that shown in igure 6. The outer long contact is preferably used as the positive side of the supply line and the other long contact and its connected short contact are on the negative side. As will be noted in the drawings, the short contact does not effect electrical connection with the short plug, hence the wire 44 to the intermediate portion of the heating wire 25 is dead.

The current therefore passes through the whole heating coil or wire 25 through the end wires 42 and 43. However, when the socket is reversed, 'as shown in the lower part of Figure 7, all three plugs and contacts efi'ect electrical connection because the short fingers of the contact 36 receive the I Ill 25 from whence it takes the two aths to,

the terminal wires 42 and 43 to t e %lugs 31 and 32 and the contacts 34 and 35. ach of the two paths is about one-half of the whole wire 25 and hence -a much higher heat will be developed by the increased passa of current.

fis shown in Figure 8, indicating mean are preferably provided to indicate the operative position of the socket. For example, the letter H is placed u on one side of the socket and the letter u on the other. Furthermore, the letter H is referably iiitter L is sunk so that they may be used as tactile indicatin means, 1. e., will give the desired iDdlCEtIODS, by touch as we as y sight By the use of this novel and improved device, the water is provided with an entrance and an exit to and from the hea chamber, a. plurality of heats are provide the control of the heating device is in a convenient lace upon the usual instrumentboard, t e hollow bolts have the double function of securing the casing in place and of providing a circulating passage for the water, the instrumentboard need not be cutto run the wires throu h as the use of the plate obviates such dISIldVfl-lltlfi, and it may also be additionally noted t t the use of the compartment type) of socket prevents the fin rs or clips in spreading outwardly reyond proper circuit-closing limits or toward short-circuiting engagements.

walloftecoo' Having thus described our invention what we claim as new and desire to secure by Letters Patent, is:

1. In a heating device for the water cooling system of an internal combustion engine, the combination of a casing providin a water chamber and havin a pair 0 alined a rtures therethroug securin means a ap'ted to be passed throu h sai pair of a rtures and to be secure to the bug system, said securing means having an inner hollowed portion afiording communication between the water chamber and the systemifor inter-circula-I tion of the water, and heating means in the chamber.- 7

2.-In a heating device for the water cooling system of an internal combustion engine, the combination of a casing providing a water chamber, means for securing the f casing to a wall of said cooli system, heating means in the chamber, t e cam and the wall having a plurality of spa intercommunicating openings whereby 1 the embossed or raised while the water may freely circulate to and from the water chamber.

8. In a heating device for the water cooling system of an internal combustion engine, the combination of a casing providing a water chamber and having splaced pairs of alined apertures therethroug securin means adapted to be passed throu h eac pair of apertures and to be secured wall of the cooling system, each of said securing means having an inner hollowed portion afiording communication between the water chamber and the system for intercirculation of the water, and heating means in the chamber.

tothe- 4. In a heating device for'thetwater cool- 1 ing system of an internal combustion engine,

the combinationof a casing providing a ing ada ted to afford communication be v tween t e water chamber and the system for inter-circulation of the water.

5. In a heating device for the water cooling system of an internal combustion engine, the combination of a casing providin a water chamber, heating means therein an spaced from the inner face thereof, the easing having an enlarged portion with a air of alined openings in the opposite sides thereof, securing means adapted to be secured in said alined openin tend through the casing an the wall of the cooling system to secure the casin to said wall, the securing means having a ollow portion to afiord communication between the cooling system and the water chamber for inter-circulation of the water.

6. In a heating device for the water cool-- ing system of an internal combustion engine, the combination of a casing providing a water chamber, heating means thereinand spaced from the inner face thereof, the casing havin enlarged portions upon-oposite sides 0 said heating means, each enarged portion having a pair of alined openings in the opposite sides thereof, securing means adapted to be inserted througheach alined pair of openin s and to extend through the casing an the wall of the cooling s stem to secure the casing to said wall eac securing means having a hollow portion to afford communication betweenthe cooli system and the water chamber or inter-circulation of the water.

7 In a heating device for the water cool- 7 ing system of an internal combustion engine,

the combination of a casing providing 'a water chamber adapted to be secured'to a and to ex- Wall of the cooling system to permit intercirculation of the water beween the system and the chamber, an electric heating element 'in said casing, said heating element cem- 6 prisin an insulated base, electric wires asse thereabout, a non-conducting covermg for said wires, and a metallic shell

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