US3712168A - Article and method for preventing escape of pyrophoric material - Google Patents

Article and method for preventing escape of pyrophoric material Download PDF

Info

Publication number
US3712168A
US3712168A US00117244A US3712168DA US3712168A US 3712168 A US3712168 A US 3712168A US 00117244 A US00117244 A US 00117244A US 3712168D A US3712168D A US 3712168DA US 3712168 A US3712168 A US 3712168A
Authority
US
United States
Prior art keywords
cartridge
encapsulating
slurry
percent
plunger
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00117244A
Other languages
English (en)
Inventor
V Watson
F Mackness
J Cheetham
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ronson Corp
Original Assignee
Ronson Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ronson Corp filed Critical Ronson Corp
Application granted granted Critical
Publication of US3712168A publication Critical patent/US3712168A/en
Assigned to NIHON SIBER HEGNER, K.K. reassignment NIHON SIBER HEGNER, K.K. SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: RONSON CORPORATION A CORP OF NJ
Assigned to SECURITY PACIFIC BUSINESS CREDIT INC.,, Lazere Financial Corporation reassignment SECURITY PACIFIC BUSINESS CREDIT INC., SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: RONSON CORPORATION
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B21/00—Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00—Blasting cartridges, i.e. case and explosive
    • F42B3/28—Cartridge cases characterised by the material used, e.g. coatings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B5/00—Cartridge ammunition, e.g. separately-loaded propellant charges
    • F42B5/02—Cartridges, i.e. cases with charge and missile
    • F42B5/18—Caseless ammunition; Cartridges having combustible cases
    • F42B5/192—Cartridge cases characterised by the material of the casing wall
    • F42B5/196—Coatings

Definitions

  • ABSTRACT A method and an article to be encapsulated in which a relatively small cartridge containing a substance which is spontaneously combustible is completely sealed and Forms Application Prlomy Dam enclosed in the encapsulating material.
  • the encapsu- Feb. 26, 1970 Great Britain ..9,485/70 lating material can be a, polyamide mixture having a tear strip embedded therein whereby a sharp pull on US. Cl ..86/l, 431/267 the strip i quickly release the cartridge f the Int-Cl. ..C06b 21/02 capsulating mechanism Field of Search ..86/l; 431/267; 53/36, 14
  • Cartridges of this type have a small orifice through which a minute quantity of the pyrophoric substance is discharged when the cartridge is struck or otherwise actuated.
  • the cartridge contains an actuating mechanism which, in its inoperative condition, maintains the orifice sealed to prevent leakage. In use, this mechanism has been found to be completely reliable. However, should it be necessary to transport cartridges containing the pyrophoric substance by mail or by air, then it may be considered that the sealing of these cartridges is inadequate for postal or air freight rules and additional means may be required to insure that the pyrophoric substance will not be accidentally ejected.
  • the invention contemplates that such a cartridge be encapsulated in a material which is impervious and tire resistant to eliminate the possibility of the pyrophoric substance contacting the outside air.
  • the material must not be easily removed by jarring but must be easily removable by authorized personnel.
  • the material must be light in weight and small in bulk for shipping, packaging and storage purposes.
  • the cartridge is encapsulated in a polyamide mixture having a melting point less than 150 C. but preferably between 90 C. and 120 C., in which the mixture includes at least one additive to render it fire resistant.
  • Other additives impart to the mixture pliability enabling the encapsulation to be easily opened by hand and to prevent the mixture from bonding to the cartridge except by friction.
  • a tear strip can be embedded within the encapsulating mixture whereby the encapsulating body may be torn open to expose the cartridge housed therewithin when desired.
  • FIG. 1 is a cross section of the encapsulated cartridge
  • FIG. 2 is an end view thereof.
  • FIG. 1 there is shown an encapsulated cartridge 10.
  • the cartridge 12 itself is wholly enclosed within an outer sheath 11.
  • the cartridge 12 is adapted to be used as an ignition mechanism to ignite a fuel such as butane.
  • a housing 13 having an open interior forms the outer walls of the cartridge 12.
  • the housing 13 is closed at the rear portion by means of an end plug 14 which can have a flanged end 15 extending beyond the periphery of the housing 13.
  • the end plug 14 has a grooye 16 formed therein for the reception of an o-ring or other elastomeric seal 17.
  • End cap 14 is secured to the housing 13 by crimping the end of the housing thereby forming a circumferential detent 18 which firmly bears against the sealing member 17.
  • the front portion of the housing 13 has a tapered orifice 19 bored therein and sized to receive a correspondingly tapered orifice pin 20.
  • the pin 20 is secured to a plunger 21.
  • the plunger 21 includes a hollow chamber 22 and a shoulder 23 formed on the exterior surface of the plunger.
  • An absorbent material 24 which can be Kaowool or any other suitable absorbent material is packed into the plunger 21.
  • the absorbent is saturated with a spontaneously ignitable substance such as aluminum borohydride AI(BH Small passageways 25 in the plunger 21 allow the aluminum borohydride vapors to advance to the front of the cartridge and exit through the orifice 19 when the pin 20 is withdrawn.
  • a coiled spring 26 has one end thereof resting on the shoulder 23 of the plunger and the other end bears against the end plug 14 such that the spring is under compression. The spring thereby urges the plunger 21 toward the front of the housing 13 and the pin 20 is forced to seat within the tapered orifice 19 and thereby seal the orifice.
  • the cartridge 12 can be placed in a butane cigarette lighter and the pyrophoric substance emitted therefrom can be used to ignite the fuel emanating from the burner valve in a cigarette lighter as shown and described in US. Pat. No. 3,360,965 entitled Gas Lighter" and issued on Jan. 2, 1968.
  • cartridges of this type must be handled relatively carefully because they can be made to produce a small flame when they are mishandled. In order to insure against the hazards which can result from mishandling the cartridge, it is completely immersed in a sealing substance which is fireproof, impervious to air and can be readily removed by the consumer and also gives the added advantage of shock proofing the cartridge.
  • a mixture is initially prepared comprising a polyamide chosen from a group having a flexible molecular chain.
  • a chlorinated diphenyl is added followed by the addition of ester wax and then n-butyl stearate.
  • the mixture is then heated so as to form a slurry in the following proportions: 54% Polyamide, 32% Chlorinated Diphenyl, 11% Ester Wax and 3% n- Butyl Stearate.
  • the mixture is preferably maintained at a temperature between C. and C.
  • the cartridge 12 is completely immersed in the viscous slurry for approximately 1 to 2 seconds and the coating 11 is then al' lowed to cure at room temperature for approximately 15 to 20 seconds during which the coating 11 solidifies toa fairly uniform thickness of between 1/16 to A; inch and has a plastic or rubber-like texture.
  • a more rapid setting time can be obtained if the cartridge is chilled prior to immersion in the slurry. Chilling also reduces the risk of any harmful effects by heat on the cartridge.
  • a strip of glass fiber-self-adhesive tape 27 can be wrapped around the cartridge prior to dipping the cartridge in the slurry.
  • the tape 27 is wrapped around the cartridge one to three times and the end is left extending about one-half inch beyond the periphery of the cartridge. This portion of the tape 27 will not be imbedded in the slurry and the user of the device merely pulls on the free end of the tape to tear open the covering on the cartridge when the coating has cured.
  • An encapsulated cartridge containing a pyrophoric substance therein comprising,
  • a housing having a closed end and having an orifice bored in the opposite end
  • a pyrophoric substance within said housing located such that it can pass through said orifice in a minute quantity when the actuating means opens the orifice
  • a method for encapsulating a cartridge comprising the steps of a. filling a cartridge with a pyrophoric substance,
  • a method for encapsulating a cartridge as defined in claim 7 including the step of maintaining the cartridge in the slurry for approximately 1 to 2 seconds.
  • a method for encapsulating a cartridge as defined in claim 7 including the step of securing a tear strip to the cartridge to facilitate the removal of the cured encapsulating material.
  • a method for encapsulating a cartridge as defined in claim 7 including the step of chilling the cartridge prior to immersing the cartridge in the slurry.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Packages (AREA)
  • Reinforced Plastic Materials (AREA)
  • Lubricants (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)
US00117244A 1970-02-26 1971-02-22 Article and method for preventing escape of pyrophoric material Expired - Lifetime US3712168A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB948570 1970-02-26

Publications (1)

Publication Number Publication Date
US3712168A true US3712168A (en) 1973-01-23

Family

ID=9872872

Family Applications (1)

Application Number Title Priority Date Filing Date
US00117244A Expired - Lifetime US3712168A (en) 1970-02-26 1971-02-22 Article and method for preventing escape of pyrophoric material

Country Status (7)

Country Link
US (1) US3712168A (de)
AT (1) AT333927B (de)
CA (1) CA932546A (de)
DE (1) DE2110133C3 (de)
FR (1) FR2079054A5 (de)
GB (1) GB1354282A (de)
HK (1) HK20677A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8813652B2 (en) 2010-09-17 2014-08-26 Amtec Corporation Pyrophoric projectile
US20190360699A1 (en) * 2018-05-24 2019-11-28 Parker Eugene Holterman Fire Starting Apparatus

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3204385A (en) * 1961-10-05 1965-09-07 Continental Aviat & Eng Corp Method of packaging articles in foam plastic
US3377955A (en) * 1961-06-07 1968-04-16 Solid Fuels Corp Coated tablets and other fuel cores of exotic reactive fuels and method of making same
US3535065A (en) * 1966-07-15 1970-10-20 Nationale Sa Igniter cartridge

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3377955A (en) * 1961-06-07 1968-04-16 Solid Fuels Corp Coated tablets and other fuel cores of exotic reactive fuels and method of making same
US3204385A (en) * 1961-10-05 1965-09-07 Continental Aviat & Eng Corp Method of packaging articles in foam plastic
US3535065A (en) * 1966-07-15 1970-10-20 Nationale Sa Igniter cartridge

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8813652B2 (en) 2010-09-17 2014-08-26 Amtec Corporation Pyrophoric projectile
US20190360699A1 (en) * 2018-05-24 2019-11-28 Parker Eugene Holterman Fire Starting Apparatus

Also Published As

Publication number Publication date
ATA166871A (de) 1976-04-15
FR2079054A5 (de) 1971-11-05
DE2110133C3 (de) 1978-08-17
DE2110133A1 (de) 1971-11-11
HK20677A (en) 1977-05-13
CA932546A (en) 1973-08-28
GB1354282A (en) 1974-06-05
AT333927B (de) 1976-12-27
DE2110133B2 (de) 1977-12-22

Similar Documents

Publication Publication Date Title
US2995088A (en) Multi-stage igniter charge
US2776623A (en) Closure device
US4335652A (en) Non-electric delay detonator
US2742856A (en) Burster
US2229208A (en) Gas generating cartridge
US5088412A (en) Electrically-initiated time-delay gas generator cartridge for missiles
US2597641A (en) Pressure-operated starting device
US1878491A (en) Explosive device
US5313888A (en) Pull-wire igniter for flares
US3712168A (en) Article and method for preventing escape of pyrophoric material
US3399622A (en) Reloadable shotgun shell device
US2289318A (en) Propellent fuel cartridge
US3974772A (en) Rocket igniter
US6263797B1 (en) Enhanced flare apparatus
US2627810A (en) Igniter
US3744417A (en) Cracker
GB2044415A (en) Non-electric delay detonator and assembly of a detonating cord and a delay detonator
US2516898A (en) Primer and method of manufacture
US2937493A (en) Rocket propellant igniter
US3479954A (en) Igniter system for illuminating compositions
US3910190A (en) Hand-held signaling device having manual firing means
US3895577A (en) Long burning delay blasting caps
US2791962A (en) Rocket igniter
US3363563A (en) Primer having closed flash hole means
US20030036335A1 (en) Toy hand grenade

Legal Events

Date Code Title Description
AS Assignment

Owner name: NIHON SIBER HEGNER, K.K.

Free format text: SECURITY INTEREST;ASSIGNOR:RONSON CORPORATION A CORP OF NJ;REEL/FRAME:004286/0886

Effective date: 19840314

AS Assignment

Owner name: LAZERE FINANCIAL CORPORATION 60 EAST 42ND STREET,

Free format text: SECURITY INTEREST;ASSIGNOR:RONSON CORPORATION;REEL/FRAME:004304/0018

Effective date: 19840516

Owner name: SECURITY PACIFIC BUSINESS CREDIT INC., 228 EAST 45

Free format text: SECURITY INTEREST;ASSIGNOR:RONSON CORPORATION;REEL/FRAME:004304/0018

Effective date: 19840516