US2984836A - Firing tool with ammunition, more particularly for use as a pin driving tool - Google Patents

Firing tool with ammunition, more particularly for use as a pin driving tool Download PDF

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Publication number
US2984836A
US2984836A US676775A US67677557A US2984836A US 2984836 A US2984836 A US 2984836A US 676775 A US676775 A US 676775A US 67677557 A US67677557 A US 67677557A US 2984836 A US2984836 A US 2984836A
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US
United States
Prior art keywords
jacket
barrel
breech block
cartridge
bore
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
US676775A
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English (en)
Inventor
Schenkel Willi
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.)
Individual
Original Assignee
Individual
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 CH334408D priority Critical patent/CH334408A/de
Priority to DEN12381A priority patent/DE1174719B/de
Priority to FR1161386D priority patent/FR1161386A/fr
Application filed by Individual filed Critical Individual
Priority to US676775A priority patent/US2984836A/en
Application granted granted Critical
Publication of US2984836A publication Critical patent/US2984836A/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
    • B25C1/126—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge acting directly on the bolt operated by a hammer blow
    • 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
    • B25C1/16—Cartridges specially adapted for impact tools; Cartridge and bolts units
    • B25C1/163—Cartridges

Definitions

  • a two-part construction of the cartridge chamber which is often provided to permit the forcible extraction of the cartridge case and wherein one part is displaceable and is constructed as an injector, has the disadvantage, more particularly when small-calibre cartridges are used, that the pressure generated by the explosion fractures the wall of the case in the vicinity of the joints between the abutting cartridge chamber par-ts, whereby firstly the explosion gases issuing through the joints cause undesirable soiling, and secondly the cartridge case becomes ⁇ so tigh-tly jammed that it tears when the ejector is operated, since the cartridge base rim against which the ejector -acts cannot withstand forces of the intensity necessary in such cases.
  • the cartridge In the case of certain ring tools, such as are known more particularly for kdriving fastening pins, the cartridge is situated in a cylinder which is inserted in a rearward widening of the barrel. In this case 4this cylinder is generally removed after each shot is tired, and then the cartridge case is ejected from the cylinder from the front by means of a rod. Here also jamming may occur if the cartridge chamber bore is not absolutely clean. However it Vis possible to interchange the cylinder and to continue operations without losing any time. But this .construction has the disadvantage that the explosion gases may pass through the space between the cylinder V and the widened portion of the barrel towards the breech block and into the rear .parts of the tiring device. This causes harmful soiling vand gas losses.
  • the present invention overcomes all ⁇ these defects and relates -to -a tiring device with ammunition, wherein the barrel is widened at its rearward end vin order to accommodate ammunition andis closed by a movable breech block.
  • the invention resides in that the ammunition consists of jacketed cartridges, the jacket having its maximum diameter ⁇ at a cross-section situated forwardly of its central portion and the contour of the jacket portion situated forwardly of the said ,cross-section is adapted to the widened rear portion of the barrel whereas on the contrary the jacket portion situated rearwardly of this crosssection is adapted in contour to a forwardly open recess situated in the breech block, the jacket tapering from ⁇ the aforesaid cross-section towards both ends with such differences in contour that, as a result of the two contours having different gripping capacity, when the breech block is pushed back after loading, the said jacket, adhering in the breech block, is .automatically pulled out of the widened portion ofthe barrel.
  • the jacket is expediently made of a synthetic plastic materialwhich has the property of providing a reliable seal between the jacket and the jacket housing formed by the widened portion of the barrel. Owing to its elasticity, a jacket of this kind will be widened slightly in an elastically yieldable fashion after detonation, owing to the explosion pressure, and bears against the wall of the widened portion of the barrel o n all sides, but at the same time it also acts as a shock-absorbing cushion between the cartridge case and the barrel, so that hard impacts against the wall of the widened portion of the barrel are prevented.
  • the calibre of the jacket can optionally be made smaller than the calibre of the barrel, so that small-calibre ammunition can be .used with advantage.
  • the jacketing of the cartridge allows a certain amount of freedom in the gradation of calibres.
  • the subject of the invention is also particularly well adapted 11 of the breech block recess.
  • aas/nase for use in ring devices employed in slaughtering work, and in small-calibre weapons of all kinds.
  • Figs. 1 and 2 are longitudinal central sectional views illustrating the loaded condition, with the rear handle in different rotated positions.
  • Fig. 3 is a View similar to Fig. l, with the barrel removed from the breech block.
  • Fig. 4 is a cross-sectional view taken on the line IV-IV of Fig. 3.
  • Figs. 5 to 8 each show a particular form of embodiment of the ammunition with the jacket shown in longitudinal central sectional view.
  • the tiring tool comprises a barrel 1 whose bore has at its rear end a conically widened portion 2 to accommodate ammunition.
  • the ammunition consists of a jacketed cartridge 3, the jacket having its maximum diameter at a cross-section situated forwardly of its central portion.
  • the jacket portion 4 situated in front of this diameter is in the form of a hollow truncated cone matching the contour of the widened portion 2.
  • the jacket portion 5 which is situated rearwardly of the afore- Asaid cross-section is fashioned in the manner of a hollow yof a hard-elastic synthetic plastic material which bears with a tight t against the housing owing to the force t.
  • the jacket portion 5 is formed internally at its rear end with a groove in which the laterally projecting base rim 8 of the cartridge 3 is sunk.
  • the breech block comprises a central cylindrical aperture which adjoins the recess 6 and in which a plug 9 is mounted so as to be displaceable axially to a limited extent.
  • the plug is formed with a central collar 10 which is mounted with some axial clearance in a corresponding annular groove
  • the wall bounding the annular groove 11 at the rear is formed of a threaded ring 12 which is screwed into a corresponding internal screwthreading of the breech block aperture.
  • the plug 9 is provided with an eccentric axial bore in which a tiring pin 13 is mounted so as to be displaceable in the axial sense.
  • the plug 9 When the device is in the loaded condition illustrated, the plug 9 s constrained to bear against the rear side of the jacket portion 5 and the cartridge base, this being ensured by appropriate adjustment of the threaded ring 1'2, so that no play exists between the said ring and the collar 10, the whole of the possible play being provided at the opposite side of the collar.
  • the rear end of the breech block is surrounded by an axially displaceable, cap-shaped handle 14 whose inner end wall is provided with a projection 15.
  • the handle 14 is under the influence of a restoring spring 16 which is arranged inside the said handle and which is fashioned as a compression spring and the said handle is held nonpositively in the pushed-back end position shown in Figs. 1 and 2, in which it is secured against being pushed back further by means which are not shown in the drawings.
  • the spring 16 is adapted to act at the same time as a torsion spring and its rear end portion 17 engages in a recess in the end of the handle 14, whereas its forward end portion 18 engages in a corresponding recess in the breech block.
  • the spring is so pre-tensioned torsionally that when it is not influenced by other forces it holds the handle 14 nonpositively rotated into the one Vend position shown in Figs. 1 and 3, in which the projection 15 bears against a stop pin 19 which is mounted on the rear of the breech block.
  • the projection 15 is arranged eccentrically in such manner that in the secondmentioned rotated position the tiring pin 13, and in the other rotated position the free rear side of the plug 9, is situated in its axial path of movement so that by advancing the handle 14 relatively to the breech block it is possible to carry out selectively the operation of detonating the cartridge 3 when the breech is closed (Fig. 2), and the operation of ejecting the cartridge case when the breech is opened (Fig. 3), since in the latter case, as Fig. 3 shows, owing to the axial advance of the handle 14, the projection 15 pushes the plug 9 ⁇ forward into the forward end position and thus forcibly ejects the jacket 4, 5 together with the cartridge 3 from its housing in the breech block recess 6.
  • the breech is opened by screwing the barrel 1 out of the breech block, whereupon the jacket portion 4 is readily detached from its seat on the wall of the widened portion 2 of the barrel bore, since, as hereinbefore mentioned the angle of taper of the portion 4 is greater than that of the rear portion 5 of the jacket, which therefore has greater capacity for gripping against its seating surface than has the front portion 4 of the jacket.
  • a fastening pin 22 is inserted into the barrel bore lfrom the rear.
  • This pin comprises at its rear end a guide surface 23 which corresponds to the barrel calibre and which comprises at the rear a base ring 24 with a laterally slightly projecting rim which comes to bear with a close tit in the ⁇ front end portion of the widened portion 2, when the pin is inserted from the rear into the barrel bore.
  • the ammunition in the form of the jacketed cartridge 3 is inserted either into the widened portion 2 of the barrel vor into the recess 6 of the breech block, -and the breech block is screwed on.
  • the restoring spring 16 holds the rear handle 14 in the initial position shown in Fig. 1. In order to fire a shot,y
  • the lthe barrel muzzle is placed against the predetermined part of the article into which the pin is to be tired.
  • the operator grasps the -barrel ⁇ 1 with one Ahand and in his other hand he holds the rear handle 14 and turns the latter in the direction of the arrow 21 (Fig. 4) into the other end position which is illustrated in Fig. 2 and in which the tiring pin lies in the path of the projection 15, so that when the handle 14 is pushed forward the cartridge is detonated, thus propelling the pin 22 as soon as the explosion force behind it has increased sutciently to overcome the braking action of the ring 24.
  • the jacket has the same shape as that shown in Figs. 1 to 3.
  • the angle of taper a of the rear jacket portion 5 amounts to approximately 10
  • the angle of taper of the front jacket portion 4 is more than 40. It is expedient to make the angle a not more than 15 and the angle at least 15. It is also expedient to make the rear jacket portion 5 lo'nger than the front portion 4.
  • the rear jacket portion is rather more than twice as long as the front portion. In the embodiment illustrated in Fig. 8, this length ratio amounts to approximately '10:1, the angle being approximately and the angle a having approximately the same value as in the embodiment shown in Fig. 5.
  • the embodiment o'f Fig. 6 diiers from the embodiment of Fig. 5 essentially only in that the ⁇ front portion 4 of the jacket is stepped immediately in front of the largest jacket cross-section, in the form of a short sharply tapering cone 25, and merges after this step into a relatively gradual frusto-conical portion which has a sdmewhat smaller angle of taper than the angle according to Fig. 5, but which is substantially greater than the angle of schreibs taper of the rear portion 5, which again is approximately
  • the embodiment of Fig. 7 diiers essentially from the embodiments already described in that the front portion of the jacket comprises a rounded end 26 whereas the rear portion 5 is constructed approximately similarly to the embodiments shown in Figs. 5 and 6.
  • the jacket tapers from a cross-section of maximum diameter towards both ends with such differences in contours that, owing to the resulting different gripping capacity of the two contours, when the breech block is pushed back after the tool has been loaded the said jacket, adhering in the breech block, is automatically withdrawn from the rear widened portion 2 of the barrel bore, so that when the breech is opened the jacket is mounted with its rear portion 5 in the recess 6 of the breech block. Consequently, when the breech is opened after each shot, the jacket together with the cartridge case can readily be removed by operating the ejecting means.
  • a barrel formed with an axial bore which gradually increases in cross sectional area from a part of said bore located adjacent but forwardly of the rear end of the barrel up to the rear end of the barrel; a breech block connected to the barrel adjacent the rear end thereof for axial movement with respect thereto, said breech block extending rearwardly from the rear end of the barrel and being formed with an axial bore which is an extension o'f and coaxial with the barrel bore, said bore of said breech block having at its front end a cross sectional area substantially equal to the cross sectional area of the rear end of the bore of the barrel and said bore of said breech block gradually diminishing in cross sectional area rearwardly from the yfront end of the bore of the breech block through an axial distance greater than the axial distance of said part of said bore of said barrel from the rear end thereof, so that an ammunition jacket having an exterior contour matching that of said breech block bore and the barrel bore from said part thereof to the rear end of the barrel will
  • spring means located in said cap member between said end wall thereof and said breech block for yieldably maintaining said cap member in a rear idle position where said projection is axially displaced rearwardly df said plug and tiring pin.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)
US676775A 1955-06-24 1957-08-07 Firing tool with ammunition, more particularly for use as a pin driving tool Expired - Lifetime US2984836A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CH334408D CH334408A (de) 1955-06-24 1955-06-24 Schiesseinrichtung mit Munition, insbesondere zum Eintreiben von Steckbolzen
DEN12381A DE1174719B (de) 1955-06-24 1956-06-20 Bolzensetzgeraet
FR1161386D FR1161386A (fr) 1955-06-24 1956-06-22 Dispositif de tir avec munition, destiné en particulier à enfoncer des boulons à pointe
US676775A US2984836A (en) 1955-06-24 1957-08-07 Firing tool with ammunition, more particularly for use as a pin driving tool

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2139555 1955-06-24
US676775A US2984836A (en) 1955-06-24 1957-08-07 Firing tool with ammunition, more particularly for use as a pin driving tool

Publications (1)

Publication Number Publication Date
US2984836A true US2984836A (en) 1961-05-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
US676775A Expired - Lifetime US2984836A (en) 1955-06-24 1957-08-07 Firing tool with ammunition, more particularly for use as a pin driving tool

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Country Link
US (1) US2984836A (de)
CH (1) CH334408A (de)
DE (1) DE1174719B (de)
FR (1) FR1161386A (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3162125A (en) * 1961-07-25 1964-12-22 Olin Mathieson Propellent cartridge
US3162123A (en) * 1962-11-28 1964-12-22 Olin Mathieson Liquid propellant cartridge
US3172117A (en) * 1961-08-03 1965-03-09 Holz Erich Explosively actuated tool
US3221966A (en) * 1963-01-11 1965-12-07 Omark Industries Inc Powder actuated tool
US3468466A (en) * 1966-11-21 1969-09-23 Birmingham Small Arms Co Ltd Explosive-actuated tools
US3473718A (en) * 1966-11-21 1969-10-21 Birmingham Small Arms Co Ltd Explosive-actuated tools
US3923227A (en) * 1973-12-13 1975-12-02 Hilti Ag Tapered seal between the barrel and drum type magazine in a fastening element setting gun

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB371716A (en) * 1930-12-20 1932-04-28 Karl Schermer Improvements in slaughtering pistols
DE922994C (de) * 1950-06-30 1955-01-31 Karl Schermer & Co Bolzenschussapparat
SE149829C1 (de) * 1953-08-21 1955-04-26
US2811901A (en) * 1954-08-23 1957-11-05 Aircraft Armaments Inc Method and apparatus for sabot removal
US2931039A (en) * 1955-08-29 1960-04-05 Olin Mathieson Cartridge firing apparatus

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190921650A (en) * 1909-09-22 1910-09-22 Federico Hartmann Improvements in Apparatus for Adapting Small-arms for Using Miniature Ammunition.
US2083665A (en) * 1933-10-06 1937-06-15 Washington Inst Of Technology Ammunition and ordnance device
AT158653B (de) * 1937-10-13 1940-05-10 Walter Weber Verfahren zur Herstellung von Geschoßpatronen.
NL77753C (de) * 1950-11-01
AT177383B (de) * 1951-07-18 1954-01-25 Maschb Hilti Ohg Schießvorrichtung für Verankerungsgeschosse
LU31350A1 (de) * 1951-09-01
FR1073314A (fr) * 1951-11-29 1954-09-23 Appareil pour enfoncer des boulons métalliques dans des parties de construction

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB371716A (en) * 1930-12-20 1932-04-28 Karl Schermer Improvements in slaughtering pistols
DE922994C (de) * 1950-06-30 1955-01-31 Karl Schermer & Co Bolzenschussapparat
SE149829C1 (de) * 1953-08-21 1955-04-26
US2811901A (en) * 1954-08-23 1957-11-05 Aircraft Armaments Inc Method and apparatus for sabot removal
US2931039A (en) * 1955-08-29 1960-04-05 Olin Mathieson Cartridge firing apparatus

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3162125A (en) * 1961-07-25 1964-12-22 Olin Mathieson Propellent cartridge
US3172117A (en) * 1961-08-03 1965-03-09 Holz Erich Explosively actuated tool
DE1191760B (de) * 1961-08-03 1965-04-22 Holz Elektro Feinmechanik Kartuschenlagerbuchse und Bolzensetzgeraet zur Aufnahme derselben
US3162123A (en) * 1962-11-28 1964-12-22 Olin Mathieson Liquid propellant cartridge
US3221966A (en) * 1963-01-11 1965-12-07 Omark Industries Inc Powder actuated tool
US3468466A (en) * 1966-11-21 1969-09-23 Birmingham Small Arms Co Ltd Explosive-actuated tools
US3473718A (en) * 1966-11-21 1969-10-21 Birmingham Small Arms Co Ltd Explosive-actuated tools
US3923227A (en) * 1973-12-13 1975-12-02 Hilti Ag Tapered seal between the barrel and drum type magazine in a fastening element setting gun

Also Published As

Publication number Publication date
CH334408A (de) 1958-11-30
FR1161386A (fr) 1958-08-28
DE1174719B (de) 1964-07-23

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