US2720012A - Pest control smoke generating devices - Google Patents

Pest control smoke generating devices Download PDF

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Publication number
US2720012A
US2720012A US240594A US24059451A US2720012A US 2720012 A US2720012 A US 2720012A US 240594 A US240594 A US 240594A US 24059451 A US24059451 A US 24059451A US 2720012 A US2720012 A US 2720012A
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Prior art keywords
fuse
pest control
smoke generating
control smoke
generating devices
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US240594A
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Cecil H Lilly
Douglas J B Marke
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Imperial Chemical Industries Ltd
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Imperial Chemical Industries Ltd
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
    • A01M1/00—Stationary means for catching or killing insects
    • A01M1/20—Poisoning, narcotising, or burning insects
    • A01M1/2022—Poisoning or narcotising insects by vaporising an insecticide
    • A01M1/2061—Poisoning or narcotising insects by vaporising an insecticide using a heat source
    • A01M1/2066—Poisoning or narcotising insects by vaporising an insecticide using a heat source burning insecticide, e.g. impregnated candles, burning coils
    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06D—MEANS FOR GENERATING SMOKE OR MIST; GAS-ATTACK COMPOSITIONS; GENERATION OF GAS FOR BLASTING OR PROPULSION (CHEMICAL PART)
    • C06D3/00—Generation of smoke or mist (chemical part)
    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06D—MEANS FOR GENERATING SMOKE OR MIST; GAS-ATTACK COMPOSITIONS; GENERATION OF GAS FOR BLASTING OR PROPULSION (CHEMICAL PART)
    • C06D7/00—Compositions for gas-attacks

Definitions

  • British specification No. 631,487 corresponding to U. S. Patent No. 2,521,942
  • a device for producing an ejecting material in vapour form comprising a closed container having a plurality of venting perforations in the top wall member thereof guarded by barrier elements hindering the escape of solid particles and sparks and spaced from the supporting wall, containing a length of combustible cord of cross section greater than that of any of the venting perforations impregnated with the material to be vapourised and comprising a self-combustible material as its thermally active constituent, arranged in a coil below the unperforated portion of the top wall member, one end of the cord protruding from the container for the ignition of the said coil from the exterior, through a hole of corresponding cross section, so made to prevent the protruding end of the cord from falling back into the container.
  • this device is particularly useful in connection with devices of the nature described and claimed in British specification No. 631,113
  • the object of the present invention is to provide a pest control smoke generating device which is safe to handle and to use for the generation of pesticidal vapours which are extremely toxic to human beings, and which is so constructed as to be particularly suitable for insertion into narrow diametered holes or orifices, as for instance for dropping through a long hollow rod previously inserted into the heart of a nest of a leaf-cutting ant, e. g. Atta cephalotes L., Atta sexdens L., Acromyrmax octospinoss Reich.
  • a leaf-cutting ant e. g. Atta cephalotes L., Atta sexdens L., Acromyrmax octospinoss Reich.
  • a pest control smoke generating device comprises an impermeable tubular casing closed at one end and provided at the other end with a removable cover and a length of fuse, preferably semi fuse, preferably sealed at one end and preferably provided at its other end with a matchhead composition, wherein the fuse if sealed at one end is enclosed in the casing with its sealed end nearer the closed end of the casing, wherein said tubular casing is preferably provided at its open end with an ignition delay element, and wherein the said fuse has at least some of its textile yarn coverings impregnated with a thermally vapourisable pesticidal compound.
  • the impermeable tubular casing and its removable cover are preferably made of metal as for example aluminium.
  • the length of fuse is preferably sealed at the end near the closed end of the casing to prevent its ejection from the casing after it is ignited. It is often important to prevent the ejection of the fuse length particularly when the device is used for example in green-houses, because in this way any poisonous residual pesticide is retained within the impermeable tube. Instead however of sealing the fuse at one end or additionally thereto the fuse can be retained in position on ignition by crimping the container at one or more positions so as to grip it.
  • the matchhead composition facilitates ⁇ the ignition of the length of fuse from the ignited ignition delay element.
  • the latter is preferably of such compositions as to be readily ignited by an ordinary match which does not easily ignite directly a fuse or semi-fuse.
  • the thermally vapourisable pesticidal compound can be for example the very powerful liquid pesticide Parathion (E605) which is OO diethyl O-p-nitrophenyl thiophosphate; or for example the solid pesticide the gamma isomer of benzene hexachloride.
  • E605 very powerful liquid pesticide Parathion
  • solid pesticide the gamma isomer of benzene hexachloride.
  • drawing 1 is a metal tube 5 in. in length and 1A in. in diameter
  • 2 is the core of a semi- :safety fuse the textile coverings 3 and 4 of which are impregnated with 0.3 gram Parathion
  • 5 is the end of the semi safety fuse sealed with wax
  • 6 is the end of the semi safety fuse which has been dipped in an igniter wick dope consisting of sulphurless meal 38 parts and nitrocellulose dope 57 parts.
  • 7 is a slow burning delay primer composition consisting of ammonium nitrate 40%, arnmonium dichromate 35% and nitrocellulose dope 25%.
  • 8 is a metal closure.
  • the slow burning delay element 7 can be ignited with an ordinary match and the tube 1 with its contents, 2, 3, 4, 5, 6 and 7 inserted for instance into the hole of an ants nest or dropped through a long hollow rod previously inserted into the heart of a nest of a leaf-cutting ant.
  • a delay in the pick-up of the flame from the ignited delay element 7 by the core 2 of the semi-fuse there is no spit or llame to hurt the operator and no release of insecticide too soon before the metal tube 1, with its contents 2, 3, 4, 5, 6 and 7, is in position.
  • fuse encompasses any elongated material that burns at a regular controllable speed. It is a generic term to cover safety fuse, detonating fuse and a lead fuse having an incendiary composition inside it.
  • Safety fuse is a fuse for blasting which burns, does not explode and does not contain its own means of ignition. It is of such strength and construction and contains a burning composition in such quantity that the combustion of the fuse will not communicate laterally with other like fuses.
  • a semi-fuse if of the good variety, may be a "safety fuse because such a fuse again must not communicate its burning laterally to other like fuses.
  • the difference between a semi-fuse and a safety fuse is that the former does not possess any waterproof coatings and, therefore, must not come in contact with moisture or Water.
  • a pest control smoke generating device comprising a narrow, elongated, impermeable, tubular, metal casing closed at one end and provided at the other end with a removable metal cover and an ignition delay element comprising a slow-burning delay primer composition, said tubular metal casing having positioned and enclosed therein an elongated length of textile covered semi-fuse having at least some of its textile yarn coverings impregnated with a thermally-vaporizable pesticidal compound 3 and said semi-fuse being iixed to the closed end of said casing to thereby prevent the ejection of said fuse upon ignition thereof.
  • a pest control smoke generating device as claimed in claim 1 wherein the delay primer composition comprises ammonium nitrate, ammonium di-chromate and nitrocellulose dope.

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  • Life Sciences & Earth Sciences (AREA)
  • Pest Control & Pesticides (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Toxicology (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Environmental Sciences (AREA)
  • Botany (AREA)
  • Plant Pathology (AREA)
  • Insects & Arthropods (AREA)
  • General Health & Medical Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Description

Oct. 11, 1955 c. H. L.u Y ETAL PEST CONTROL SMOKE GENERATING DEVICES Filed Aug. 6, 1951 /n ve nors:
United States Patent O 2,720,012 PEST CONTROL SMOKE GENERATING DEVICES Cecil H. Lilly, Saltcoats, and Douglas J. B. Marke, West Kilbride, Scotland, assignors to Imperial Chemical Industries Limited, a corporation of` Great Britain Application Augusta, 19s1,se1ia1Nd.z4o,s`94 Claims priority, application Great Britain August 22, 1950 4 Claims. (o1. z1111) The present invention relates to pest control smoke generating devices.
In British specication No. 590,293, corresponding to U. S. Patent No. 2,488,776, there is described and claimed inter alia a safety fuse cord wherein one or more of the textile yarn coverings around the powder core are coated or impregnated with a thermally vapourisable pesticidal compound.
1n British specification No. 631,487, corresponding to U. S. Patent No. 2,521,942, there is described and claimed inter alia a device for producing an ejecting material in vapour form comprising a closed container having a plurality of venting perforations in the top wall member thereof guarded by barrier elements hindering the escape of solid particles and sparks and spaced from the supporting wall, containing a length of combustible cord of cross section greater than that of any of the venting perforations impregnated with the material to be vapourised and comprising a self-combustible material as its thermally active constituent, arranged in a coil below the unperforated portion of the top wall member, one end of the cord protruding from the container for the ignition of the said coil from the exterior, through a hole of corresponding cross section, so made to prevent the protruding end of the cord from falling back into the container. It is stated that this device is particularly useful in connection with devices of the nature described and claimed in British specification No. 631,113, corresponding to U. S. Patent No, 2,521,941.
The object of the present invention is to provide a pest control smoke generating device which is safe to handle and to use for the generation of pesticidal vapours which are extremely toxic to human beings, and which is so constructed as to be particularly suitable for insertion into narrow diametered holes or orifices, as for instance for dropping through a long hollow rod previously inserted into the heart of a nest of a leaf-cutting ant, e. g. Atta cephalotes L., Atta sexdens L., Acromyrmax octospinoss Reich.
According to the present invention a pest control smoke generating device comprises an impermeable tubular casing closed at one end and provided at the other end with a removable cover and a length of fuse, preferably semi fuse, preferably sealed at one end and preferably provided at its other end with a matchhead composition, wherein the fuse if sealed at one end is enclosed in the casing with its sealed end nearer the closed end of the casing, wherein said tubular casing is preferably provided at its open end with an ignition delay element, and wherein the said fuse has at least some of its textile yarn coverings impregnated with a thermally vapourisable pesticidal compound.
The impermeable tubular casing and its removable cover are preferably made of metal as for example aluminium.
The length of fuse is preferably sealed at the end near the closed end of the casing to prevent its ejection from the casing after it is ignited. It is often important to prevent the ejection of the fuse length particularly when the device is used for example in green-houses, because in this way any poisonous residual pesticide is retained within the impermeable tube. Instead however of sealing the fuse at one end or additionally thereto the fuse can be retained in position on ignition by crimping the container at one or more positions so as to grip it.
The matchhead composition facilitates` the ignition of the length of fuse from the ignited ignition delay element. The latter is preferably of such compositions as to be readily ignited by an ordinary match which does not easily ignite directly a fuse or semi-fuse.
The thermally vapourisable pesticidal compound can be for example the very powerful liquid pesticide Parathion (E605) which is OO diethyl O-p-nitrophenyl thiophosphate; or for example the solid pesticide the gamma isomer of benzene hexachloride.
The invention is illustrated with reference to the diagrammatic drawing accompanying the specification which drawing is a vertical cross section of a pest control smoke generating device in accordance with an embodiment of the invention. In the drawing 1 is a metal tube 5 in. in length and 1A in. in diameter, 2 is the core of a semi- :safety fuse the textile coverings 3 and 4 of which are impregnated with 0.3 gram Parathion, 5 is the end of the semi safety fuse sealed with wax, 6 is the end of the semi safety fuse which has been dipped in an igniter wick dope consisting of sulphurless meal 38 parts and nitrocellulose dope 57 parts. 7 is a slow burning delay primer composition consisting of ammonium nitrate 40%, arnmonium dichromate 35% and nitrocellulose dope 25%. 8 is a metal closure.
After removing the cover 8 the slow burning delay element 7 can be ignited with an ordinary match and the tube 1 with its contents, 2, 3, 4, 5, 6 and 7 inserted for instance into the hole of an ants nest or dropped through a long hollow rod previously inserted into the heart of a nest of a leaf-cutting ant. As there is` a delay in the pick-up of the flame from the ignited delay element 7 by the core 2 of the semi-fuse there is no spit or llame to hurt the operator and no release of insecticide too soon before the metal tube 1, with its contents 2, 3, 4, 5, 6 and 7, is in position.
In the foregoing disclosure the word fuse encompasses any elongated material that burns at a regular controllable speed. It is a generic term to cover safety fuse, detonating fuse and a lead fuse having an incendiary composition inside it.
Safety fuse is a fuse for blasting which burns, does not explode and does not contain its own means of ignition. It is of such strength and construction and contains a burning composition in such quantity that the combustion of the fuse will not communicate laterally with other like fuses.
A semi-fuse, if of the good variety, may be a "safety fuse because such a fuse again must not communicate its burning laterally to other like fuses. The difference between a semi-fuse and a safety fuse is that the former does not possess any waterproof coatings and, therefore, must not come in contact with moisture or Water.
What we claim is:
1. A pest control smoke generating device comprising a narrow, elongated, impermeable, tubular, metal casing closed at one end and provided at the other end with a removable metal cover and an ignition delay element comprising a slow-burning delay primer composition, said tubular metal casing having positioned and enclosed therein an elongated length of textile covered semi-fuse having at least some of its textile yarn coverings impregnated with a thermally-vaporizable pesticidal compound 3 and said semi-fuse being iixed to the closed end of said casing to thereby prevent the ejection of said fuse upon ignition thereof.
2. A pest control smoke generating device as claimed in claim 1 wherein the metal is aluminium.
3. A pest control smoke generating device'as claimed in claim 1 wherein the pesticidal compound is Parathion.
4. A pest control smoke generating device as claimed in claim 1 wherein the delay primer composition comprises ammonium nitrate, ammonium di-chromate and nitrocellulose dope.
Fouke Jan. 30, 1923 Weinberg July 6,1926
2,090,297 Knoche Aug. 17, 1937 2,127,975 Kemp Aug. 23,1938 2,440,082 Flanders Apr. 20,1948 2,488,776 Jones Nov. 22, 1949 5 2,521,941 Pearsall Sept. 12, 1950 2,521,942 Pearsall Sept. 12,1950 2,551,406 Yent May 1, 1951 2,603,607 Stevenson July 15, 1952 OTHER REFERENCES Gersdorf, W. A., et a1., in Journal of Economic entomology, vol. 44, No. 4, pp. 474-6.
Pearsall, D. E., et al., Insecticidal Cords in Soap and Sanitary Chemicals for October 1946, pp. 139-43, 15 161-63.

Claims (1)

1. A PEST CONTROL SMOKE GENERATING DEVICE COMPRISING A NARROW, ELONGATED, IMPERMEABLE, TUBULAR, METAL CASING CLOSED AT ONE END AND PROVIDED AT THE OTHER END WITH A REMOVABLE METAL COVER AND AN IGNITION DELAY ELEMENT COMPRISING A SLOW-BURNING DELAY PRIMER COMPOSITION, SAID TUBULAR METAL CASING HAVING POSITIONED AND ENCLOSED THEREIN AN ELONGATED LENGTH OF TEXTILE COVERED SEMI-FUSE
US240594A 1950-08-22 1951-08-06 Pest control smoke generating devices Expired - Lifetime US2720012A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT926U1 (en) * 1994-10-06 1996-08-26 Buck Chem Tech Werke PYROTECHNICAL PEST DESTRUCTION DEVICE

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1443464A (en) * 1921-09-23 1923-01-30 Philip B Fouke Smoke producer
US1591902A (en) * 1922-10-21 1926-07-06 Isaac J Weinberg Mothproofing material
US2090297A (en) * 1937-08-17 Deodorizer
US2127975A (en) * 1936-12-24 1938-08-23 Kemp Archibald Fumigating or deodorizing device
US2440082A (en) * 1945-06-04 1948-04-20 Ici Ltd Thermally vaporisable fumigant comprising sensitized ammonium nitrate and a presticide
US2488776A (en) * 1945-04-09 1949-11-22 Ici Ltd Means for fumigating with pesticidal compounds
US2521942A (en) * 1947-09-26 1950-09-12 Ensign Bickford Co Means for containing and dispensing heat vaporizable chemical agents
US2521941A (en) * 1945-09-11 1950-09-12 Ensign Bickford Co Device for producing the vapor of a chemical agent
US2551406A (en) * 1949-02-28 1951-05-01 Tobacco By Products And Chemic Fumigating package
US2603607A (en) * 1944-02-07 1952-07-15 Stevenson Reston Smoke generating device

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2090297A (en) * 1937-08-17 Deodorizer
US1443464A (en) * 1921-09-23 1923-01-30 Philip B Fouke Smoke producer
US1591902A (en) * 1922-10-21 1926-07-06 Isaac J Weinberg Mothproofing material
US2127975A (en) * 1936-12-24 1938-08-23 Kemp Archibald Fumigating or deodorizing device
US2603607A (en) * 1944-02-07 1952-07-15 Stevenson Reston Smoke generating device
US2488776A (en) * 1945-04-09 1949-11-22 Ici Ltd Means for fumigating with pesticidal compounds
US2440082A (en) * 1945-06-04 1948-04-20 Ici Ltd Thermally vaporisable fumigant comprising sensitized ammonium nitrate and a presticide
US2521941A (en) * 1945-09-11 1950-09-12 Ensign Bickford Co Device for producing the vapor of a chemical agent
US2521942A (en) * 1947-09-26 1950-09-12 Ensign Bickford Co Means for containing and dispensing heat vaporizable chemical agents
US2551406A (en) * 1949-02-28 1951-05-01 Tobacco By Products And Chemic Fumigating package

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT926U1 (en) * 1994-10-06 1996-08-26 Buck Chem Tech Werke PYROTECHNICAL PEST DESTRUCTION DEVICE

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