US1060266A - Protective device for electrically-heated utensils. - Google Patents

Description

J. F. LAMB. PROTECTIVE DEVICE FOEELBGTRIGALLY HEATED UTENSILS.

. APPLICATION FILED DIEO.13, 1912. 11,060,266.

' w TNESSES INVENTOR 4 4 Joseph E Lamb:

4 f BY A'ITORNEY Patented Apr. 29, 1913.

UN ED s-TATEs PATENT oFFIoE. 1

,JOSEPH F. LAMB, OI? NEW BRITAIN, CONNECTICUT, ASSIGNOR T LANDERS, FRARY &

CLARK, OF NEW BRITAIN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

PROTECTIVE DEVICE Eon ELECTRICALLY-HEATED UTENSILS.

citizen of the United Be it known that I, Josnrn F. LAMB, a States, and a resident of New Britain, in the county of Hartford and State of Connecticut,,have invented certain new and useful Improvements in Irotective Utensils, of which the following is a specification.

The object of the invention 18 to provide means for automatically breaking the circuit ofan electrical heater at a predetermined temperature,which is a little lower than a temperature which would destroy or injure the heater or the utensil, thus acting as a guard to protect the device in case it is inadvertently left with the current on when it i is empty.

In the drawings which illustrate an embodiment of the invention Figure 1 is a' side elevation partly in section, Fig. 2 is the bottom view of the heater.

In the drawings a denotes a receptacle, 6 its base, and c the complete heater; (5 and 6 represent the circuit wires, the Wire 6 being broken and connected with the terminals 1, 10, which, as -seen, terminals'may be conveniently mounted on a part of the heater and insulated therefrom, and, as shown, they project through insulating sleeves 2, l2, into a tubular hub 13, which is threaded to receive a tubular I bushing 14, provided with an insulating lininlg 15 which supports a tube of lead 01' ot er suitable metal, which contacts with the spaced terminals 1, 10 and provides an' electrical connection between them. If the utensil is empty and the current left on, the heat will soon rise to a point where the lead sleeve willbe melted and the circuit between the terminals 1, 10, broken. As the lead melts it will run out through the tubular bushing and so keep the seat in the insulating lining free and clear. In order to reestablish the circuit connections it is only necessary to remove the bushing 14, remove what is left of the lead connector and insert Specificatioh of Letters Patent. Application filed December 13, 1912.

Devices for Electrically-Heated are spaced apart. These Patented Apr. 2.), 1 913. Serial no. 736,526.

I claim as my invention:

1. The combination with an electrical heater, a pair of spaced terminals connected into the circuit of said heater, and a holder,

of 'a connector having a relatively low fusing point, formed separately from but clamped between said terminals and holder.

2. The combination with of material fusible at a relatively low temperature, and a holder formed at least in part of insulating material, engaging said connector to hold it in contact with the adjacent ends ,ofithe broken circuit. L

3. The combination with an electrical heater and a pair of spaced terminals connected into the circuitof said heater, of a tubular hub within which the ends of said terminals project, a bushing threaded into the end of said hub, an insulating lining in said bushing, and a connector of metal fusible at a relatively low temperature separated from but supported by said insulating lining in contact-with said terminals.

4. The combination with an electrical heater and a pair of spaced terminals con nected into the circuit of said heater, of a tubular hub within which the ends of said terminals project, a tubular bushing thread ed into the end of said hub, an insulating lining in said bushing, and a tubular connector of metal fusible at-a relatively low temperature supported by said insulating a connector made lining in contact with said terminals.

5. The combination with an electrical heater and a pair of spaced termlnals 'connected into the circuit of said heater, of a tubular hub within which the ends of said terminals project, a tubular bushing threaded into the end of said hub, an insulating an electrical heater having a n mally broken'circuit of lining located within the bushing and havmg an inwardly inclined seat, and a tubular connector of metal fusible at a relatively low temperature supported-on the seat in the insulating lining and held in contact with the terminals.

' 6. The combination with an electrical heater and a pair of spaced terminals connected into-the circuit of said heater, of a tubular hub depending-from the underside of the heater and having alined apertures through which said terminals pro ect, insulating linings inthej apertures, a connector made of metal having'a relatively low fusinector,

(rated in the recess in said holder, insulating 10 material interposed between the holder and connector, and means for supporting said holder to position and maintain said connector in contact- With said terminals.

ing point located within said hub in contact with said terminals, a holder for said connieans for supporting said holder in position, and insulation interposed between the connector and the hub.

7. The combination with an electrical JOSEPH F. LAMB. heater and a pair of spaced terminals con- Witnesses: nected into the circuit of said heater, of a C. H. DEMiNG,

in one end, a connector 10- O. N. J UDD.

holder recessed

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