Combustion – Timer – programmer – retarder or condition responsive control – Of extinguishing means
Patent
1988-06-06
1989-04-04
Green, Randall L.
Combustion
Timer, programmer, retarder or condition responsive control
Of extinguishing means
431289, 431288, F23N 500
Patent
active
048182141
DESCRIPTION:
BRIEF SUMMARY
The subject invention concerns a device for extinguishing the flame of a candle to prevent that the flame of the burning candle progresses so far along the length of the candle that there is a risk that the flame will cause fires.
Several devices for this purpose are known. A feature that these devices have in common is their unnecessarily complicated structure. This is due to the fact that they are based on the principle that as soon as the flame reaches a predetermined level one movable part of the structure is activated and either by pivoting about a joint or otherwise, moves in over the flame and extinguishes the latter by suffocation. The prior-art devices often make the candle unnecessarily expensive and in some cases they are not particularly reliable.
The subject invention provides a device which is very simple and inexpensive, yet it is capable of ensuring that the candle flame will be positively extinguished when it reaches a predetermined level along the length of the candle. The invention is characterized by a sleeve of heat-shrinkable plastics which is applied about the candle so as to encircle the latter, which sleeve, when affected by the heat generated by the candle flame, is arranged to shrink and thus at least partly close about the end of the candle, thus extinguishing the flame.
The invention will be described in closer detail in the following with reference to the accompanying drawing FIGURE, which is a fragmentary lateral view of a candle stick intended to hold a number of candles, two of which are shown in the drawing.
The candlestick 1 illustrated in the drawing comprises a number of candle holding members, two 2 and 3' of which are shown in the fragmentary view, of the drawing. For purposes of decoration, the candlestick is filled with e.g. dried moss 4 or other flammable materials.
Candle holding member 2 supports a burning candle 5. At the lower part of the candle 5, a considerable distance below the burning flame 6 and immediately above the moss 4, a sleeve 7 of heat-shrinkable plastics is applied around the candle. The plastics could be translucent so that it will be practically invisible, if desired, and contrary to the situation illustrated in the drawing FIGURE.
The candle holding member 3 supports an extinguished candle 8. This candle has burnt to the point where the heat from the burning flame has heated a plastic sleeve 7' corresponding to sleeve 7 on candle 5. The upper part of the sleeve 7' therefore has started to shrink and contract about the upper end of the candle 8. The supply of oxygen to the flame therefore is reduced and the flame size is diminishing. As a result, also the gasification of the material (stearine) of the candle 8 is reduced, leading to extinction of the flame.
The plastic sleeve 7, 7' may be displaced along the candle 5, 8 and it may be stopped at any desired level above the candle holding members 2, 3 according to wish. For instance, it may sometimes be desired to fill the entire candlestick with moss 4 which thus will reach up to a considerable level along the length of the candle 5, 8. Consequently, it becomes necessary to ensure that the candle is extinguished comparatively early, well before the flame approaches the moss. At other times, for instance when a candlestick holding four candles is used, one for each Sunday of Advent, one may wish to extinguish the candle lit on the first Sunday of Advent after just a brief period of burning to ensure that the candle could be lit also on the following three Sundays of Advent. In each case the desired burning time is easily established in advance by placing the device in accordance with the invention at the desired level along the candle, whereby extinction of the candle flame will be achieved automatically at the desired point. Thus there is no risk that a burning candle, left unattended, will burn until consumed or until the flame reaches the holding means and perhaps cause fires.
A candle 5, 8 which has been extinguished by the plastic sleeve 7, 7' after the preselected burning time can easily be
REFERENCES:
patent: 4138211 (1979-02-01), Kampfer et al.
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