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US2758544A - Engine-starting cartridges - Google Patents

Engine-starting cartridges Download PDF

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Publication number
US2758544A
US2758544A US304374A US30437452A US2758544A US 2758544 A US2758544 A US 2758544A US 304374 A US304374 A US 304374A US 30437452 A US30437452 A US 30437452A US 2758544 A US2758544 A US 2758544A
Authority
US
United States
Prior art keywords
starting
cartridge
engine
cartridges
cylindrical
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
US304374A
Inventor
Millns Terence William
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.)
Lucas Support Services Ltd
Original Assignee
Rotax Ltd
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 Rotax Ltd filed Critical Rotax Ltd
Application granted granted Critical
Publication of US2758544A publication Critical patent/US2758544A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N99/00—Subject matter not provided for in the other groups of this subclass
    • F02N99/002—Starting combustion engines by ignition means
    • 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
    • F42B3/04—Blasting cartridges, i.e. case and explosive for producing gas under pressure

Definitions

  • a conventional form of cartridge comprises a cylindrical shell containing a solid propellent material which on ingition provides a quantity of gas at high pressure for starting the engine.
  • the cartridge is inserted in a closely fitting cylindrical chamber and is held in position by a removable cover on the outer end of the chamber. This arrangement has been found to be inconvenient, as it is often difiicult to withdraw the cartridge shell from the chamber after firing.
  • the object of the present invention is to provide an improved form of cartridge shell which when held by appropriate means enables the above mentioned difficulty to be obviated.
  • the invention comprises a cylindrical cartridge shell having combined with 'ts forward end a nose piece on which one or more circumferential collars are formed,
  • a hollow cylindrical nose piece b there is secured forward end of a cylindrical to the cartridge shell a a hollow cylindrical nose piece b.
  • the exterior of the nose piece are formed two circumferential collars c, d of larger diameter than the shell.
  • the forward face of the collar d is formed with an under-cut e, and the other face is bevelled as shown.
  • the collar 0 is of rather smaller diameter than the collar d and has an undercut front face 1 which is shallower than the corresponding face of the collar d.
  • the portion g of the nose between the collars is of cylindrical form.
  • a cartridge as above described is intended for use with a clamping means for securing it in position, which means is adapted to grip only the collars c, d on the nose piece.
  • An engine-starting cartridge comprising in combination a cylindrical shell containing propellant material, and a separately formed cylindrical nose piece secured to one end of the shell and having formed thereon a pair of circumferential collars one of which is of larger diameter than the other and can be gripped by clamping means for holding the cartridge in its firing position, the collar of larger diameter having its front face undercut and its rear face bevelled, and the other collar having its front face undercut.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Description

1956 T. w. MILLNS 2,758,544
ENGINE-STARTING CARTRIDGES Filed Aug. 14, 1952 gas turbines or other United States Patent 0 2,758,544 ENGINE-STARTING CARTRIDGES Application August 14, 1952, Serial No. 304,374
Claims priority, application Great Britain August 15, 1951 1 Claim. (Cl. 102-39) This invention relates to cartridges used for starting engines. A conventional form of cartridge comprises a cylindrical shell containing a solid propellent material which on ingition provides a quantity of gas at high pressure for starting the engine. Ordinarily the cartridge is inserted in a closely fitting cylindrical chamber and is held in position by a removable cover on the outer end of the chamber. This arrangement has been found to be inconvenient, as it is often difiicult to withdraw the cartridge shell from the chamber after firing.
The object of the present invention is to provide an improved form of cartridge shell which when held by appropriate means enables the above mentioned difficulty to be obviated.
The invention comprises a cylindrical cartridge shell having combined with 'ts forward end a nose piece on which one or more circumferential collars are formed,
the collars being adapted to be gripped by a clamping means. 'The accompanying drawing is a sectional elevation of a cartridge provided with the invention.
Referring to the drawing, there is secured forward end of a cylindrical to the cartridge shell a a hollow cylindrical nose piece b. 0n the exterior of the nose piece are formed two circumferential collars c, d of larger diameter than the shell. The forward face of the collar d is formed with an under-cut e, and the other face is bevelled as shown. The collar 0 is of rather smaller diameter than the collar d and has an undercut front face 1 which is shallower than the corresponding face of the collar d. The portion g of the nose between the collars is of cylindrical form.
A cartridge as above described is intended for use with a clamping means for securing it in position, which means is adapted to grip only the collars c, d on the nose piece.
By the use of a cartridge as above described in association with appropriate clamping means (such as that forming the subject of the concurrent application for Patent No. 304,375 of even date, now Patent No. 2,705,398), the above mentioned difiiculty of removing a spent cartridge is obviated.
Having thus described my invention what I claim as new'and desire to secure by Letters Patent is:
An engine-starting cartridge comprising in combination a cylindrical shell containing propellant material, and a separately formed cylindrical nose piece secured to one end of the shell and having formed thereon a pair of circumferential collars one of which is of larger diameter than the other and can be gripped by clamping means for holding the cartridge in its firing position, the collar of larger diameter having its front face undercut and its rear face bevelled, and the other collar having its front face undercut.
References Cited in the file of this patent UNITED STATES PATENTS
US304374A 1951-08-15 1952-08-14 Engine-starting cartridges Expired - Lifetime US2758544A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2758544X 1951-08-15

Publications (1)

Publication Number Publication Date
US2758544A true US2758544A (en) 1956-08-14

Family

ID=10914797

Family Applications (1)

Application Number Title Priority Date Filing Date
US304374A Expired - Lifetime US2758544A (en) 1951-08-15 1952-08-14 Engine-starting cartridges

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US (1) US2758544A (en)
CH (1) CH304837A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US27791A (en) * 1860-04-10 Island
US60698A (en) * 1867-01-01 Silas ckispitf
US2529504A (en) * 1948-04-26 1950-11-14 William J Kroeger Ammunition for recoilless firearms

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US27791A (en) * 1860-04-10 Island
US60698A (en) * 1867-01-01 Silas ckispitf
US2529504A (en) * 1948-04-26 1950-11-14 William J Kroeger Ammunition for recoilless firearms

Also Published As

Publication number Publication date
CH304837A (en) 1955-01-31

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