Heating – Heat applicator having structure for mounting it on or...
Patent
1991-02-01
1993-01-12
Dority, Carroll B.
Heating
Heat applicator having structure for mounting it on or...
431350, 432183, F24J 300
Patent
active
051785358
DESCRIPTION:
BRIEF SUMMARY
This invention relates to devices for heating articles, especially for heating small articles, and to heating tools that incorporate such devices.
There are many instances in which relatively small, heat-recoverable articles need to be recovered in circumstances in which there is no source of electricity to hand, in which case it has been proposed to employ a gas burner, e.g., a propane or butane gas burner. In addition to the fact that such articles do not require a supply of electricity, they may be manufactured in such a manner that they are readily portable. However, such devices as are presently available have the disadvantage that they cannot recover different articles in a controlled manner. For example the colour, opacity or construction of the article to be heated may affect the speed with which the article is heated to a considerable degree.
According to one aspect, the invention provides a device for heating an article by means of a gas torch that is provided with a burner, which comprises an element that is capable of being mounted on the torch and will deflect hot gases from the burner to one side of the burner, and side arms that are movable between a position in which they allow an article to be positioned with respect to the element so that the article can be heated substantially by radiation emanating from the burner to a position in which the article is at the side of the burner and is heated principally by hot gases which are produced by the burner and which have been deflected by the element.
This form of device may be mounted on a gas torch that is provided with its own burner. Alternatively, the device may itself be provided with a burner. Thus, according to another aspect, the invention provides a device that can be attached to a gas supply in order to heat an article, which comprises a burner for producing heat from combustion of gas derived from the supply, an element that will deflect hot gases from the burner to one side of the burner, and side arms that are moveable between a position in which they allow an article to be positioned with respect of the element so that the article can be heated substantially by radiation emanating from the burner to a position in which the article is to the side of the burner and is heated principally by hot gases which are produced by the burner and which have been deflected by the element.
The device may, if desired, form part of a heating tool which comprises a reservoir for fuel, a burner for combustion of the fuel and a device of the type described above.
The devices according to the invention are relatively simple and therefore can be manufactured relatively inexpensively. In addition, by altering the position of the side arms, it is possible to adjust the relative proportion of hot air and infrared radiation emitted by the device. Thus the device may be employed to heat a range of articles, for example, heat-recoverable solder connectors, heat-recoverable tubing both clear and opaque and of different colours, crimp connectors with heat-recoverable insulation and the like, the optimum proportion of hot air and infrared radiation being selected by adjustment of the side arms.
The burner used in the device may for example comprise a catalytic heating element, for example, comprising a catalyst metal e.g. platinum, that is supported on a ceramic or other refractory support through or past which the gas/air mixture flows.
In the broadest aspect of the invention the element for deflecting the combustion gases may be lustrous so that some proportion of electromagnetic radiation is reflected by it, this form of element being particularly useful where it is intended to heat solder connection devices. Alternatively it may be matt so that relatively little radiation is reflected, in which case the proportion of heating due to conduction from the hot combustion gases when the article is moved to the side of the device is increased. Also, the amount of infrared radiation received by the article to be heated when it is positioned to the side of the burne
REFERENCES:
patent: 3816065 (1974-06-01), Marietta
patent: 3845755 (1974-11-01), Aske
patent: 4449925 (1984-05-01), Williams et al.
Burkard Herbert G.
Dority Carroll B.
Raychem SA
Rice Edith A.
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