Electric resistance heating devices – Heating devices – Vaporizer
Patent
1997-05-28
1999-07-20
Walberg, Teresa
Electric resistance heating devices
Heating devices
Vaporizer
439 13, A61M 1600, H01R 3900
Patent
active
059266147
DESCRIPTION:
BRIEF SUMMARY
The present invention refers to an electric device for the vaporization of additives according to the preamble of claim 1.
Devices of that kind have become more popular, e.g. for vaporizing scents and fragrances, to repel small insects, such as mosquitoes for example. These devices are preferrably provided with a plug integrated within the housing, so that the device can be directly plugged into a socket.
A problem is that the device can normally only be operated in a certain position, since the additive is usually bound in a liquid carrier material or in a paste, and that leaking of the carrier material is only prevented in a certain position of the device, but the bushes of a wall socket can be on a horizontal or a ve rtical line.
There are devices existing which solve this problem by providing a plug within this housing which can be turned at an angle of approximately 90.degree.. Then it is possible to pivot the housing of the device to the desired operating position.
Devices of that kind are known, which are provided with an electric switch, by means of which the heating can be turned on and off. The device does not have to be pulled out of the wall to be turned off.
The object of the invention is to provide a device of the above-mentioned kind, which is provided with an adaptor to vertical or horizontal wall sockets, and which is still of a simple design.
This object is solved on the basis of a device of the kind of the invention in that the plug is provided with a first rotating joint member, which is engages a second rotating joint member arranged within the housing and that contacts are arranged in each of the rotating joint members, which can be brought into and out of contact with the contacts associated to each of the respective contacts of the other rotating joint member.
The contacts and the respective counter-contacts on the two rotating joint members are arranged so that a continuous electrical connection between the plug contacts and the heating results in two positions offset by 90.degree. and an angular range with a switch position results in which the connection is opened.
By providing the contacts and the respective counter-contacts on the two rotating joint member, a simplified construction of the device results which is turned on and off by rotating the housing with respect to the plug. The device can always take a certain turn-on position because the device has two turn-on positions offset by 90.degree., said operating position being independent from the fact whether the device is plugged into a vertical or a horizontal wall socket.
Moreover, an operator will easily recognize from the position of the housing in which operating condition the device is, since the housing is in a different position in the turned-off position than in the turned-on position of the device.
Preferrably, the angular range with the closed connection is considerably smaller than the annular range with a closed connection, the ratio of the angular range with a closed connection to the angular range with an opened connection is 1:5.
In an advantageous embodiment, the heating comprises at least one PTC resistor, disposed between two metallic electrodes, connected to the contacts of the rotating joint member through electric connection conduits. PTC heating resistors are known to stabilize themselves at a temperature depending on their dimensions.
The construction of the device becomes much more easy if the connecting conduits, the contacts, the heat exchanger and possibly the electrodes are integrally formed of a punching sheet, which is bent after punching, if necessary and which is coated by a plastic material at the points at which an increased inhere nt stability or heat insula tion is required. The device becomes much more simple by providing the essential electrically conducting parts on a simple punching sheet, since otherwise the common strand connection s become useless. Moreover, the electrically conducting parts get a higher strength due to the plastic material, which elongates the life of the device a
REFERENCES:
patent: 1994932 (1935-03-01), Vidal
patent: 2611068 (1952-09-01), Wellens
patent: 2942090 (1960-06-01), Diehl
patent: 4682830 (1987-07-01), Nagashima
patent: 4874924 (1989-10-01), Yamamoto et al.
patent: 5038394 (1991-08-01), Hasegawa et al.
patent: 5222186 (1993-06-01), Schimanski et al.
patent: 5352122 (1994-10-01), Speyer et al.
Paik Sam
Steinel GmbH & Co. KG
Walberg Teresa
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