Electric heating – Heating devices – Combined with diverse-type art device
Patent
1985-01-03
1986-12-02
Goldberg, E. A.
Electric heating
Heating devices
Combined with diverse-type art device
219211, 219517, 219541, 200 6104, H05B 100, H05B 300
Patent
active
046266577
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a washable electric heating appliance such as an electric blanket or an electric spread blanket.
BACKGROUND ART
Even among conventional electric heating appliances, for example, electric blankets, there are a few kinds of them which can be cleaned. However, even when, in order to provide a washable electric blanket, such textile fabrics with increased strength in the rate of shrinkage being small are employed and a cord socket case portion of the blanket for a cord plug is made water-proof, there often arises a problem of a dry cleaning to be applied to the fabrics.
More specifically, due to the bad influences of a dry cleaning solution on an electric blanket or the like which is comprised of a heater, temperature detecting lines, etc., each including plastic material, the heater after cleaning becomes thin as a whole, with its exterior surface being hardened. Therefore, the insulation thickness cannot be ensured thereby to bring about the chance of danger of insulation inferiority. Moreover, the temperature detecting lines are, after cleaning, deteriorated, with the impedance characteristics thereof rapidly changing and the temperature of the body of the electric blanket rising, thereby to cause the probability of danger such as burns or scalds.
DISCLOSURE OF INVENTION
Accordingly, an essential object of the present invention is to provide an improved electric heating appliance which is designed to prevent danger, through obstruction of the circulation or charging of electricity to a heater thereof, in the case that it is erroneously dry-cleaned.
In accomplishing the above-described object of the present invention, there is provided a safety means which is dissolved with a dry-cleaning solution for obstructing the circulation of electricity to the heater in the case of a dry-cleaning.
Hereinafter, the present invention will be described with reference to the accompanying drawings taken in conjunction with one preferred embodiment thereof.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a top plan view of an electric heating appliance according to one preferred embodiment of the present invention.
FIG. 2 is a cross sectional view of a cord socket cause for a cord plug of the appliance of FIG. 1.
FIG. 3 is a cross sectional view showing the state where a safety means of the cord socket case for the cord plug operates.
FIGS. 4-6 are, respectively, a front elevational view, a top plan view and a side elevational view showing the connecting portion between a heater and a terminal pin of the appliance of FIG. 1.
FIGS. 7 and 8 are, respectively, a front elevational view and a top plan view of a plug of the appliance of FIG. 1.
FIGS. 9 and 10 are, respectively, a developed top plan view and a developed front elevational view of the cord socket case.
FIGS. 11 and 12 are, respectively, a bottom plan view and a cross sectional view of the cord socket case.
FIGS. 13 and 14, are, respectively, a side elevational view and a front elevational view of a spring plate of the appliance of FIG. 1.
FIGS. 15 and 16 are, respectively, a bottom plan view and a front elevational view of the cord socket case below the spring plate.
BEST MODE(S) FOR CARRYING OUT THE INVENTION
Referring to FIG. 1, a body 4 of an electric blanket of an elongated shape is comprised of a heater 6 wired within the textile fabrics 5 which are constituted into a bag-shape. In addition, an end portion of the heater 6 is connected to a terminal pin 7 within a cord socket case consisting of a pair of half shells 1 and 2 secured to each other as shown in FIG. 2. This connected area of the end portion is molded by a plastic mold 8. The cord socket shells 1 and 2 are constructed as shown in FIGS. 9 and 10. The shells are combined, with the textile fabrics 5 of the body of the electric blanket 4 sandwiched therebetween as shown in FIG. 2, and positioned as shown in FIG. 1.
Next, the shell 2 has a spring plate 3 shown in FIGS. 13 and 14 includes therein for safety means in the practice of a dry-cleaning. I
REFERENCES:
patent: 3102248 (1963-08-01), Temple
patent: 3708649 (1973-01-01), Crowley et al.
patent: 4328387 (1982-05-01), Kemble
patent: 4390776 (1983-06-01), Yane et al.
Endo Shinichi
Matsuda Isao
Goldberg E. A.
Lateef M. M.
Matsushita Electric - Industrial Co., Ltd.
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