US 2189730 A
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Description (OCR text may contain errors)
Feb. 6, 1940. q- 2,189,730
PRODUCTION OF VERMIN KILLERS Filed Sept. 21, 1937 INVENTOR:
ALFRED ESCH B Y v M W;
Patented Feb. 6, 194-0 UNITED STATES PATENT OFFICE 1 Claim.
This invention relates to a process of producing vermin killers and an apparatus for evaporating such agents.
As is well known, sulphur substances in the form of candles, threads or packings are chiefly used for killing vermin, although sulphur vapours are an imperfect agent for this purpose since they are heavier than air and therefore remain in the lower part of the room to be treated. Consequently, the vermin in the upper part of the room to be treated, which part is the preferred place for vermin, remain undestroyed and continue to exist. Moreover vapours of sulphur adhere to the rooms and objects for a considerable length of time after the treatment and leave deposits which produce defects and soiled spots. Another important defect consists in that it is necessary to produce the gas or to effect the gasification by means of vessels or packings ofa predetermined size put into the room to be treated in a provisional manner. Thus in most casesv the quantity is not adapted to the size of the room to be treated.
It is the object of this invention to obviate these drawbacks by means of a novel process of producing a vermin destroyer and a novel apparatus or device which is suitable for shipping, dosing and evaporating the novel vermin destroyer.
According to this invention 1000 parts of flowers of sulphur or sublimated sulphur are mixed in a molten condition with parts of pulverized sepia. Thisproduct is put into an evaporating vessel containing wicks which have been impregnated in hard or solid spirit, and are of a curved, for instance spiral, zigzag, wave or U-form. The evaporating vessel consists of a flat hollow box of a form which is suitable for sale. The bottom or cover of the box consists of several parts which can be bent over after removal of a cover fixed thereon by an adhesive. contents of the box is thus laid open and the bent-over portions serve as a support for the vessel.
Another feature of the invention consists in that a plurality of carriers (plates, vesselsor the like) carrying each a predetermined amount or close of the vermin killer are positioned in the hollow box (container) in the form of a staple, so that a suitable number of the single carriers may be used according to the size of the room to be treated.
The invention will be better understood by reference to the following detailed description in connection with the accompanying drawing,
showing by way of example and schematically some embodiments of an evaporating apparatus according to the invention, viz- Figure 1 is a perspective view of one embodiment of a device according to this invention.
Figure 2 is a perspective View of another embodiment.
Figure 3 is a cross-section through a third embodiment.
In the drawing, item a is the vessel of the evaporating device or apparatus into which the mixture, consisting of. 1000 parts of flowers of sulphur or sublimated sulphur, mixed in a molten state with 30 parts of pulverized sepia, is filled and then allowed to solidify. Wicks d, impregnated with solid spirit are provided in the mixture. The wicks may be of a spiral, zigzag, wave or U-shape. The bottom or cover of the vessel consists of parts 12 (Figures 1 and 2) which when bent over lay open the contents of the vessel and serve as a support for the vessel a. The parts b are moreover provided with a cover 0 which is in the form of a label fixed by an adhesive and capable of being torn off (Figure 1). Items 6 (Figure 3) are carriers, for instance plates, dishes or the like which are superposed and each provided with a certain quantity of the vermin destroyer. The carriers e are conveniently fitted with a handle f by means of which they can be taken off. Experiments with my novel vermin killer have shown that the vapours have good floating characteristics and a very intensive vermin-destroying effect, so that it is now rendered possible to treat also the upper parts of the room very intensively and to kill the vermin radically. When fresh air is admitted, the vapours disappearv or volatilize immediately. It is moreover essential that the evaporating device and the vermin killer are always ready for use and that it is now possible to apply a quantity of the vermin killer which is adapted to the size of the room or space to be treated. The defects hitherto existing are therefore avoided and moreover the device is ready for shipment and sale without any additional steps.
The device according to the invention isused as follows:
The removable cover 0 is torn off. Then the parts b are bent over so that the contents is laid open and the bent-over parts serve as a support for the vessel a. Now the impregnated wicks are set alight and cause the vermin killer substance to burn. Hereby, the substance is evaporated and continues to evaporate until it has burnt out as far as the next lower plate or carrier e. After removal of the carrier e the next lower quantity or dose of the vermin killer 5 substance is ready for use.
A vermin killer agent, comprising a mixture of 1000 parts of flowers of sulphur and 30 parts of pulverised sepia and at least one wick impregnated with solid spirit and embodied in the said mixture.