GB1156950A - An Explosive-Powered Fastening Tool - Google Patents

Abstract

1,156,950. Cartridge-actuated tools. SOC. CIVILE D'ETUDE DE PROCEDES DE SCELLEMENT. 9 Nov., 1966 [16 Nov., 1965], No. 50327/66. Heading B4C. A cartridge-actuated tool for driving fasteners such as nails, comprises a body 1 having a barrel divided into a front portion 3 and rear portion 6, the front portion being sealingly locked to the rear portion by means of a rotatable collar 14 and a cocking slider 23 which is prevented from cocking the tool unless the collar has been operated to lock the barrel portions together. The front portion 3 of the barrel is formed with serrations 3<SP>2</SP> one of which is adapted to be engaged by a pin 15 in the collar so that by rotating the latter by means of a handle 14<SP>1</SP> the front barrel portion 3 is moved into engagement with the front end face of the barrel portion 6 via a screw-thread connection. The rear barrel portion 6 is connected to a flap 4 which is pivoted on the body by means of pins 5, the flap being swung open by a lever (10, Fig. 5) in order to permit the insertion of a cartridge; the lever is also adapted to actuate an extractor sleeve 9. The cocking slider 23 is connected at its front end to a muzzle member 24 and is provided at its rear end with a pivoted sear adapted to engage with a firing pin 32; upon pressing the muzzle against a workpiece the sear engages the firing pin which is released by means of trigger 34. The slider is also provided with a pin 27<SP>1</SP> which, unless the locking collar is in its correct position, abuts a shoulder in the collar and so prevents the tool from being cocked. A splinter guard is formed by two arcuately-shaped cups 16, 17 which may be rotated relatively to each other in order to form different splinter proof shapes.