US925681A - Heater for water-bottles. - Google Patents

Description

H. W. CHRISTIAN.

HEATER FOR WATER BOTTLES. APPLIOATION FILED MAY 1a, 1908.

925,681 Patented June 22, 1909.

HERBERT W. CHRISTIAN, OF LONGBEACH, GALIFORNIA.

HEATER FOR WATER BOTTLES.

Specification of Letters Patent.

Application filed May 18, 1808.

Patented June 22, 1909 Serial No. 433.610.

To all whom it may concern:

Be it known that I, HERBERT WV. CHRIS- TIAN, a citizen of. the United States, of America, residing at Longbeach, in the county of Los Angeles,--State-of California, have invented a certain new and useful Heater for deter-Bottles; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to means for heating lluid which may be contained in any suitable receptacle, but relates more particularly to means for heating such fluid as may be used in hot-water bott es or the like.

(1118 object of the invention is to provide for such purpose, an eiiective heating means which is simple and inexpensive in construction and operation, also durable and convenient in use, and easily adjustable to obgaini desired temperature conditions of the ui Another object of the invention is to furnish a heating means the action of which'is automatically controlled to keep the tem perature of the heated fluid approximately at a redetermined value.

Still another object of the invention is to provide a construction in which the parts are readily accessible for renewal or repairs.

Gther objects of the invention will be aparent from the following description of one orm in which it may be embodied to adapt it for use in connection with hotwater bottles; reference beinghad to the accompanying drawings forming art hereof, in which,

Figure 1 is a longituginal sectional View of the invention as applied to a liot-waterbot tle. Fig. 2 is a View in perspective of the thermostatic switch and associated parts. Fig. 3 is a view of the form of a stamping blank forming part of the above. Fig. 4 is a sectional View of the built-up device, taken on the dotted line 4 4 of Fig. 1.

listening to the drawings, 2 designates a water bottle constructed of any suitable material, preferably rubber; which bottle may be provided with the sto pered aperture 3, to permit either introduction of fluid into the bottle or withdrawal of the same therefrom. Passing throu h an open'ng in the bottle and extending wel into the interior thereof is a casing 4, which is open at the upper end and casing is secured to the bottle at the upper part thereof, by a water-tight joint.

When, as shown in Fig. 1 of the drawing, the casing is provided with the threaded depending annular flange 5, the neck of the bottle if of rubber may occupy the space 6 between the casing and the flange and be vulcanized to form a water-tight joint.

As will be understood, the temperature of the fluid in the bottle may be governed by controlling the radiation of heat from the casing to the liquid. To supply the necessary heat in the casing and to regulate the amount thereof, a built-up device fitting in the casing and comprising a heating coil associated with a' thermostatic switch, is preferably eniployed. The heating coil may be wound on any suitable core 9 of insulating material, such as porcelain and, in order to obtain better regulation of heat generation by the coil, it may be divided into two parts or coils 7 and 8, each of a suitable number of turns. As shown, the upper coil 7 and the lower coil 8 are each connected with the thermostatic switch which in this instance is arranged to establish, under predetermined conditions, a shunt circuit with respect to the coil 7. The head 10 of the core is preferably of increased diameter and has fitted thereto a metal sleeve 11 which is partly threaded as at 12, to screw into the top of the casing when the heating device is positioned therein. Interiorly of'the core 9 are provided longitudinal ducts 13 and 17 which communicate with transverse ducts 13 and 17 One end 13 oi the coil 8 leads through the ducts 13 and 13 in the core 9 and may be connected to the contact pin 14 in the head 10 by means of the nut 15 in the recess 16 in the core. The other end 17 leads through the transverse duct 17 near the bottom of core 9 tothe duct 17, thence to the lower end of the core where it passes around bolt 18 and is clamped by means of the nut 19 in the cutaway portion 21 of the core. The end of the wire is then led upward through duct 17 to a point above the top of coil 8, where it passes outward through duct 17 and is wound around core 9 to form coil 7. The upper end of coil 7 is secured to sleeve 11.

The movable element 20 of a thermostatic switch may be carried by the bolt 18 and also clamped in position by the nut 19, and may be of anyv suitable or approved construction.

is preferably constructed of metal. This yFOI instance, it may consist of a bar composed of two metals having different degrees of expansion under the same temperature; say copper for the left hand part of the bar, and steel for the right hand part of the bar. The lower end of the movable element 20 is normally in contact with the contact-pin 21 of the thermostatic switch. The contact-pin 21 screws in the metal bushing 23 and has its end 22 ta ered for a purpose hereinafter mentioned. Etta-chad to the core 9 and carrying the bushing 23 is the member 24, which is preferably made up of two similar stampings 25 of sheet metal; the form of the stampings in blank being shown in Fig. 3.

In the making up of the member 24 the ends of arms 27 of the two stampings are lookseamed together, thereby forming a ring adapted to fit over the lower end of core 9.- The lower ends of the stampings. are bent at right angles to bring into registry holes 26 into which bushing 23 may be pressed. The member 24 may be secured to core 9 by forming one or more indents 28 fitting in corresponding depressions in the core.

The extensions 29 at the top of the stampings are bent outwardly and downwardly so as to contact closely with the interior wall of the casing and also serve to hold the built-up device steady in the casing.

The construction embodying the inventionhaving been'described, its operation will now be explained. Assuming that the bottle contains the necessary liquid, which may be initially heated, and that the built-up device is adjusted in the casing; then, in order to generate heat in the casin the user ma screw the socket of a drop-light on the she I 5 and obtain current from the lighting circuit for the purpose. So long as the thermostatic switch is closed, the coil 7 will be shortcircuited, and current may pass from contact-pin. 14, to lead 13*, through heating coil 8, across the switch by means of lead 17 to extensions 29 of the member 24, thence to the casing and shell 5. When the temperature in the casing has risen to such a degree that the switch is actuated to open the circuit which has been traced, the current passes from the contact-pin 14, to lead 13,

through coil 8, to terminal bolt 18, by lead 17 thence through the lead from terminal bolt 18 to coil 7, through. coil 7 to metal sleeve 11, thence to the casing and shell 5.

.Since no arcing occurs when the thermostatic switch opens, platinum contacts may be dlspensed with.

From the foregoing it will be seen that 'While the thermostatic switch is closed, in-

creased current flows in the heating coil Stu generate heat in the casing; and that when the switch opens,,a decreased current passes through both heating coils, in consequence of which the heat generated in the casing is correspond ngly lessened; the resistance of the col 7 belng so adjusted, in view of the possibe set to open or close when the temperature in the casing reaches prearranged values.

It is to be noted that while the construction shown and described is such as will permit of the use of-a lamp-socket of the Edison type to obtain current from the lighting circult, a modified construction to permit the use of a socket not of the Edison type will readily occur to those skilled in the art.

While the construction of one form in which the invention may be embodied to ada t it for use in connection with a hot-water ottle has been specifically described, it is evident that it may be employed in other relations and that various changes and modifications may be made without departing from the scope and principle of the invention.

I claim:

1. The combination with a water bottle, of a metallic casing arranged therein, a built-u device removably fitted in said casing, said device comprising a heating coil and an adjustable thermostatic switch arranged to short-circuit apart of said coil until a prearranged temperature is reached.

2. The combination with a water bottle, of a metallic casing arranged therein, a built-up dev ce removably fitted in said casing, said device comprising a core of insulating material, a heating coil on-said core, a thermostatic switch carried by said core, said switch electrically connected with parts of said coil and with said casing under predetermined conditions, and means disposed at the head of said core for electrically connecting said coil with a source of energ 3. The combination with a Water bottle, of a metallic casing arranged therein, and a built-up device fitting in said casing, said device com rising means for electrically heating flui contained in said bottle, and a thermostatic switch for automatically controlling said heatin means to keep the temperature of the fluid approximately at a prearranged value.

4. The combination with a water bottle, of a metallic casing arranged therein, and a built-up device fitting in said casing, said device comprising means for electricall heating fluid contained in said bottle, a t ern1ostatic switch for controlling said heatirwmeans to keep the temperature of the iluiil 5. The combination with a water bottle,

vice fitting in said casin said device com-' rising a heating coil an adjustable means or short-circuiting a portion of said coil until a pre-arranged temperature is reached.

7. The combination with a water bottle, of

a metallic casing extending therein, a builtup device removably fitted in said casing,

.- said device comprisin a heating coil and a thermostatic switch s ort-circuiting a portion of said coil until a prearranged temperature is reached.

8. The combination with a water bottle, of a casing extending therein, a built-u device v removably fitted in said casing, sai device prising a heating coil and an adjustable thermostatic switch short-circuiting a portion of said coil until a prearranged temperature is reached.

11. The combination with a water bottle, of a metallic casing arranged therein, a builtup device fitting in said casing arranged and a a ted for connecting with a single source of e ectrical energy, said device comprising a heating coil and means automatically controllin the electrical energy in said coil to keep t e temperature of the water approximatelyat' a pre-arranged value.

12; A built-up device comprising a core of insulating material, metallic parts carried on said core, a heating coil on said core, said coil having ends thereof connected with said metallic parts, a member on said core rovided with means adapted to contact wit the interior wall of a casing, and a movable element of a thermostatic switch carried by said core find associated with said coil and said mem- 13. A built-up device comprising a core of insulating material, metallic parts carried on said core, a heating coil on sa1d core, said coil having ends thereof connected with said metallic parts, a member on said core rovided with means adapted to contact wit the interior wall of a casing, and a movable element of,a thermostatic switch carried by said core and adjustably associated with said coil and said member. p

In testimony whereof, I have signed my name to this specification in the resence of two subscribin witnesses at on 'beach county of Los ingeles, State of Oaliiornia, this 9th da of Ma A. D. 1908.

- IERB RT W. CHRISTIAN.

Witnesses:

SUSAN L. CHRISTIAN, ALEXANDER H. Lrmmns.

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