US1519863A - Electrically-heated unit for heating liquids - Google Patents

Description

B. w. MAcY ELECTRICALLY HEATED UNIT FOR HEATING LIQUIDS Filed March 20, 1922 Patented Dec. 16, 1924.

UNITED STATES PATENT OFFICE.

BARNETT WRIGHT MACY, OF JACKSONVILLE, FLOR-IDA, ASSIGNOR TO ELECTRIC HEATING CORPORATION, OF JACKSONVILLE, FLORIDA, A CORPORATION OF FLORIDA.

ELEGTRIOALLY-HEA'IED UNIT FOR HEATING LIQUIDS.

Application filed March 20, 1922. Serial No. 545,205.

To all whom it may concem:

Be it known that I, BARNETT WRIGHT MACY, a citizen of the United States, residing at Jacksonville, in the county of Duval and State of Florida, have invented certain new and useful Improvements .in Electrically-Heated Units for Heating Liquids, of which the following is a specification.

My said invention relates to an electric heating device comprising a heating unit for heating liquids. Such a unit may be utilized in various situations as, for example, to heat the liquid in a radiator, oil being preferred for this purpose.

It is an object of the invention to rovide a device of the character descr bed which shall be durable and effective, inexpensive to manufacture and not liable to get out of order.

Referring to the accompanying drawings which are made a part hereof and on which similar reference characters indicate similar parts,

Figure 1 is an elevation of the device partly in section,

Figures 2, 3 and 4 indicate various situations in which the device of my invention may be applied.

In the drawings 10 indicates a base member which is here .shown as screw threaded for convenience in applying the same. The base member supports acore 11 of insulating material which is secured to the base member by a rod 12 composed of copper or other material forming a good conductor for electricity. At its lower end this rod passes through an insulating sleeve 13 and one or more washers 14 of insulating material, the latter being located in a hole extending through the base 10. Beneath the washer a terminal 15 is attached to the rod by a nut 16.

Spaced from the rod 12 is another rod 17 passing through a hole in the screw threaded extension of the base, this rod being surrounded by an insulating sleeve 18 of fiber or other material. A terminal 19 is attached to the lower end of rod 17 by a nut and washer similar to those previously described and the two terminals are connected by insulating material inthe usual manner and pass through a porcelain bushing 20 in a metallic plate 21 covering the lower recessed end of the base and attached thereto by screws 22 or other conventional means.

A heating element comprising a coiled wire 23- of low resistance alloy is wound spirally about the core 11 and is connected at its lower end to the rod 17 by a nut 24 and insulating washers 25. At its upper end the wire is attached to a buss in the form of a ring 26 surrounding the core or set in a groove of the same. A fuse 27 is wound about the upper end of the core and is attached at its lower end to the buss. At its upper end the fuse is attached to the rod 12 by connections here shown as comprising a washer and a pair of lock nuts 28 above which is a porcelain spacer 29 held in place by another washer and a nut, the spacer 29 forming a protection to prevent grounding.

In Figure 2 is illustrated an application of my invention to a radiator 30 of conventional type, the base 10 being shown as hexagonal in shape and threaded into a hole at one end of the radiator, a portion of the radiator being broken away at 31 to show the heating unit. The heating element extends horizontally through the lower art of the radiator and preferably throng all of the sections.

Figure 3 shows my device applied to a steam generator 32 comprising a Vertical heating pipe extending into a reservoir 33, the ordinary water level being indicated in dotted lines at 34 and a water level indicator 35 being provided to show the same. The water enters througha pipe at 36, passes up around the heated unit to the interior of the boiler and is vaporized. The water level is maintained at 34 in any convenient or preferred manner and additional water may be supplied from the pipes 37 and 38 as needed. The steam that is formed may escape at 39.

Figure 4 shows my device as applied be tween two pipe sections 40 and 41, this being a convenient manner of supplying heat at any desired portion in a pipe line or pipe system.

In the operation of my device which is primarily intended for use in liquids, the same will be entirely submerged and will ordinarily be in an upright position, to facilitate the natural movement of the fluid currents in the heated liquid. The wire is the liquid receives heat generated in the ing through the base connected to the heat wire and also the heat due to the'resistance of the liquid to passage of current between adjacent convolutions in the coil. Should the liquid become exhausted the fuse 27 will burn out instead of the entire coil being destroyed.

It will be evident to those skilled in the art that the device can be modified in various ways and can be applied in various situations other than those illustrated within the spirit of my invention, the scope of which is indicated in the appended claims.

Having thus fully described my said invention, what I clalm as new and desire to secure by Letters Patent, is:

1. A heating unit'for liquids comprising a base, an insulating core projecting therefrom at one end, rods extending through the base, one of said rods extending through the core and securing it in place, a resistance element connected to said latter rod at the outer end of the core, said element surrounding said core and secured to the other rod at its opposite end, substantially as set forth.

2. An electrical heating unit comprising a base threaded at one end and having a depending skirt forming a recessed portion at the other end, a core extending from the threaded end, a heating element surrounding the core, a rod extending through the base and core and connected to the heating element at its upper end, a second rod, extending element at its lower end, terminals within said recess attached to said rods and a cover plate extending over said recess, substantially as set forth.

3. In an electrical heating unit for liquids, a screw-threaded base for securing the unit in place, said base having a recess, a remov able metallic plate covering the recess in the base and fastened to the base by means of screws, and a porcelain bushing set in the plate, whereby electrical connections can be established with the terminals inthe recess, substantially as set forth.

4.; In an electrical heating unit for liquids, a base having means thereon for securing the unit in lace, a core extending from said base, a eating element surrounding said core, a rod connected to the heating element at its outer end extending through the base and core, a spacing element secured on the outer end of said rod adjacent the outer end of the core, a second rod extending through the base connected to the heating element at its inner end, and terminals attached to said rods, substantially as set forth.

5. An electrical heating unit for liquids comprising a base, a cylindrical core extending from said base, a band about said core intermediate the ends thereof, terminals at each end of the core, a coiled wire of low resistance material having one end connected to the terminal adjacent the base and wound spirally about, said core and havin its opposite endconnected to said band, and a fuse wire wound about said core having one end connected to said band and its other end connected to the outer terminal, substantially as set forth. I

6. An electrical heating unit for liquids comprising a base, a cylindrical core extending from said base, a band about said core intermediate the ends thereof, terminals at each end of the core, a coiled wire of low resistance material having one end connected to the terminal adjacent the base and wound spirally about said core and having its opposite end connected to said band, a fuse wire wound about said core having one end connected to said band and its other end connected to the outer terminal, and an insulating spacing element secured at the outer end of said coil, substantially as set forth.

In witness whereof, I have hereunto set.

my hand and seal at J acksonville, Florida,

this 10th day of February, A. .D. nineteen hundred and twenty-two.

BARNETT WRIGHTMAOY. [1 8.]

Witnesses:

. O. M. KEYS,

STANTON WALKER.

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