US2759185A - Chamber bushing for stud driver - Google Patents

Chamber bushing for stud driver Download PDF

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Publication number
US2759185A
US2759185A US517524A US51752455A US2759185A US 2759185 A US2759185 A US 2759185A US 517524 A US517524 A US 517524A US 51752455 A US51752455 A US 51752455A US 2759185 A US2759185 A US 2759185A
Authority
US
United States
Prior art keywords
chamber
cartridge
bushing
volume
stud
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
US517524A
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English (en)
Inventor
Robert T Catlin
Alfred W Hamann
Arthur J Landa
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.)
Remington Arms Co LLC
Original Assignee
Remington Arms Co LLC
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
Priority to BE548863D priority Critical patent/BE548863A/xx
Application filed by Remington Arms Co LLC filed Critical Remington Arms Co LLC
Priority to US517524A priority patent/US2759185A/en
Priority to DER19091A priority patent/DE1111117B/de
Priority to FR1154536D priority patent/FR1154536A/fr
Application granted granted Critical
Publication of US2759185A publication Critical patent/US2759185A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C1/00—Hand-held nailing tools; Nail feeding devices
    • B25C1/08—Hand-held nailing tools; Nail feeding devices operated by combustion pressure
    • B25C1/10—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge
    • B25C1/12—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge acting directly on the bolt

Definitions

  • This invention relates to cartridge-powered tools and has particular reference to chamber bushings or cartridge supports for cartridge-powered industrial tools such as stud drivers.
  • 1,445,126 shows the use of a restricted orifice from a cartridge chamber as a means of controlling the ignition and burning char acteristics of the powder in a system wherein the gases of the burning powder can expand in a comparatively large expansion space between the projectile and the orifice. Variations in expansion chamber space produced by variations in the projectile position are employed in Bergman as a means of controlling the range of the projectile.
  • the over-all loading density can be as high as 100% without the development of seriously high pressures and it may be as low as about 60% without seriously reducing the driving power of the stud.
  • the optimum range of over-all loading density appears to fall within the limits of about to These limits on over-all loading density appear to apply about as well to actual cartridge case loading densities ranging from slightly over 1 to as high as 3.
  • a chamber bushing which is adaptable to position cartridges of various calibers in such a manner as to permit the use of one firing mechanism with rimfire cartridges of several calibers.
  • Fig. l is a longitudinal sectional View through a stud driver mechanism, including a barrel having a chamber bushing corresponding to our invention.
  • Fig. 2 is a vew similar to said Fig. 1, showing a chamber bushing-adapted to take a larger caliber cartridge.
  • Fig. 3 is a cross-sectional view of the line 3-3 of Fig. 1, showing an end elevational view of the chamber bushing illustrated in Fig. 1.
  • Fig. 4 is a view similar to Fig. 3 and shows an end .elevational view of the chamber bushing illustrated in Fig. 2.
  • the dot-dash circle superimposed on the chamber bushing indicates the relative placement of the head of the small cartridge supported in the chamber bushing of Figs. 1 and 3, and the small dotted circle inside the dot-dash circle indicates the point of the impact of the firing pin on either size of cartridge case.
  • a fragment of a stud driver comprising a barrel 1, threadably secured to a frame plate 2.
  • the frame plate is securely locked by means of a locking sleeve 3 to a breech block 4, which supports firing mechanism including a firing pin 5.
  • a chamber bushing supporting plate 6 Secured between the breech block 4 and the frame plate 2 is a chamber bushing supporting plate 6 which provides a mounting for the chamber bushing proper indicated generally by the reference character 7.
  • the chamber bushing 7 is formed to define a cartridge receiving chamber 8 and an expansion chamber or free volume space 9. Communicating between these two chambers, both of which are wholly within the chamber bushing, is a restricted orifice section 10.
  • the chamber bushing is mounted in a recess 11 concentric with the bore 12 of the barrel 1.
  • a stud 13 of any convenient type may be received in the bore 12 and there temporarily retained by the engagement of a retaining disk 14, secured on the head of the stud, with the forward end of the recess 11.
  • powder gas generated within the cartridge case will escape through the orifice and, expanding in the chamber 9, will act upon the rear end of the stud 13 through the medium of the retainer disk 14. The further expansion of the propellent gases will drive the stud down the barrel and into the work in the usual fashion.
  • the chamber bushing 15 is provided with a larger .cartridge receiving chamber 16 to accept a cartridge of greater power.
  • the powder gases generated within the cartridge escape through an orifice 17 and, expanding in the expansion chamber 18,.acts directly on the retaining disk at the head of the stud positioned in the barrel 1.
  • the cartridge chamber section 17 in the bushing 15 is eccentric relative to the bore of the barrel to provide for a positioning of the counterbore 19 which receives the rim of the larger diameter cartridge in a position to receive the impact of the firing pin 5 without requiring any other readjustment than the interchange of the chamber bushings.
  • the larger diameter chamber bushing 15 is provided with an alignment pin 20 which may be received in a slot 21 in the face of the bushing plate 6 to assist in maintaining the eccentrically chambered bushing in the ing 7 illustrated in Fig. 1 provides Within the orifice sec- It will be noted 7 desired orientation for properly positioning the counterbore 19 beneath the point of the firing pin 5.
  • the bushing 15 is retained within the bushing plate 6 by the interengagement of the retaining pin 22 with a counterbore 23 in the shoulder of the bushing 15.
  • the bushing 7 is not provided with an alignment pin and the retaining screw 22 only loosely extends 'into an annular groove 24 to assist in maintaining the bushing secured to the bushing plate 6.
  • the .22 Long cartridge case may be loaded with 4 /2 grains of Bulls- Eye powder packed into the cartridge case and occupying a volume of .0203 cubic inch. If this same weight of powder was measured at unit density or was not compressed, its volume would be .0325 cubic inch. When so loaded, the cartridge case has a loading density of 1.6
  • tion 10 and the expansion chamber 9 a free volume of .0151 cubic inch, or a total volume in which the charge may be burned which is the sum of the volumes of the charge chamber and orifice and expansion chamber or .0354 cubic inch.
  • a charge volume, (uncompressed or at unit density), of .0325 it will be seen that the over-all loading density ready for firing is 91.8%.
  • This cartridge functions very efiiciently for driving studs and the maximum pressures recorded in normal use have been about 87,000 pounds per square inch.
  • the orifice 10 is restricted to such a degree that its cross-sectional area is approximately 55% of that of the cross-sectional area of the chamber.
  • the chamber bushings provide a counterbore which completely encloses the rim or head section of the cartridge case. It should be further noted that in a system of this type, powder gas is free to enter the section between the forward end of the chamber bushing and the forward end of the counterbore formed in the 7 barrel to receive'the chamber bushing. This resultsin a tendency for the chamber bushing to recoil or set back in the counterbore in the barrel under the influence of gas pressure and maintains the chamber bushing and the cartridge case supported therein during the interval when support is needed, in close and intimate contact with the forward face of the breech block 4.
  • a stud driving tool having a barrel with a bore extending therethrough in which a stud may be inserted for explosive projection from the muzzle of the barrel by the combustion of a charge of propellent powder compressed in and completely filling a cartridge case
  • the invention comprising an improved chamber bushing mounted in the breech end of the barrel, said chamber bushing being formed to define within itself a cartridge chamber to receive and support such a cartridge, a free volume gas expansion chamber in direct communication with the breech end of the bore of the barrel, and an orifice section of lesser cross-sectional area than either of said chambers communicating between said gas expansion chamber and the interior of said cartridge chamber to permit explosive gases generated within said cartridge chamber to expand through said orifice into said expansion chamber to act upon a stud positioned in the breech end of said barrel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
US517524A 1955-06-23 1955-06-23 Chamber bushing for stud driver Expired - Lifetime US2759185A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE548863D BE548863A (en(2012)) 1955-06-23
US517524A US2759185A (en) 1955-06-23 1955-06-23 Chamber bushing for stud driver
DER19091A DE1111117B (de) 1955-06-23 1956-06-19 Geraet zum Einschiessen von Bolzen od. dgl. in feste Aufnahmekoerper
FR1154536D FR1154536A (fr) 1955-06-23 1956-06-20 Perfectionnements aux tonnerres des instruments à enfoncer des goujons

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US517524A US2759185A (en) 1955-06-23 1955-06-23 Chamber bushing for stud driver

Publications (1)

Publication Number Publication Date
US2759185A true US2759185A (en) 1956-08-21

Family

ID=24060158

Family Applications (1)

Application Number Title Priority Date Filing Date
US517524A Expired - Lifetime US2759185A (en) 1955-06-23 1955-06-23 Chamber bushing for stud driver

Country Status (4)

Country Link
US (1) US2759185A (en(2012))
BE (1) BE548863A (en(2012))
DE (1) DE1111117B (en(2012))
FR (1) FR1154536A (en(2012))

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1189477B (de) * 1957-07-08 1965-03-18 Impex Essen Vertrieb Bolzensetzgeraet
DE1192990B (de) * 1957-12-30 1965-05-13 Impex Essen Vertrieb Bolzensetzgeraet mit regelbarer Muendungsenergie

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2549993A (en) * 1946-07-19 1951-04-24 Portable Ind Inc Breechblock for explosively actuated fastening tools
US2679645A (en) * 1949-12-02 1954-06-01 Powder Power Tool Corp Safety pad for stud driving tools
GB714931A (en) * 1951-07-18 1954-09-08 Martin Hilti Improvements in bolt shooting devices

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1445126A (en) * 1916-06-08 1923-02-13 Elmer Ordnance Corp Grenade gun
US1984117A (en) * 1932-01-02 1934-12-11 Lewis K Davis Impact device
CH237021A (de) * 1943-04-08 1945-03-31 Pyrotechnische Fabriken Ges Mi Kartusche zum Abschiessen leichtgängiger Geschosse.
US2722003A (en) * 1949-12-29 1955-11-01 Powder Power Tool Corp Method of stud driving power control
US2697830A (en) * 1949-12-29 1954-12-28 Powder Power Tool Corp Means to control the effective force of the expanding gases on a fastener, in explosively actuated fastener driving implements
AT178601B (de) * 1950-09-12 1954-05-25 Maschb Hilti O H G Bolzenschießvorrichtung
AT177383B (de) * 1951-07-18 1954-01-25 Maschb Hilti Ohg Schießvorrichtung für Verankerungsgeschosse
US2676508A (en) * 1952-10-18 1954-04-27 Powder Power Tool Corp Stud for explosive installation

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2549993A (en) * 1946-07-19 1951-04-24 Portable Ind Inc Breechblock for explosively actuated fastening tools
US2679645A (en) * 1949-12-02 1954-06-01 Powder Power Tool Corp Safety pad for stud driving tools
GB714931A (en) * 1951-07-18 1954-09-08 Martin Hilti Improvements in bolt shooting devices

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1189477B (de) * 1957-07-08 1965-03-18 Impex Essen Vertrieb Bolzensetzgeraet
DE1192990B (de) * 1957-12-30 1965-05-13 Impex Essen Vertrieb Bolzensetzgeraet mit regelbarer Muendungsenergie

Also Published As

Publication number Publication date
DE1111117B (de) 1961-07-13
BE548863A (en(2012))
FR1154536A (fr) 1958-04-11

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