GB723011A - Improvements in or relating to blind riveting - Google Patents

Abstract

723,011. Blind-riveting. AIRCRAFT MATERIALS, Ltd., and GOULD, G. H. Feb. 12, 1953 [Jan. 10, 1952], No. 748/52. Addition to 656,758, [Group VII]. Class 83 (4). An improvement in or modification of the blind-riveting tool disclosed in the parent Specification is characterized in that the operating means comprising a lazy tongs mechanism is arranged to be operated by a handle device comprising relatively movable parts that can be grasped by one of the operator's hands and so associated with the lazy tongs mechanism that by squeezing the device a force can be exerted on the tongs mechanism tending to collapse it. The tool has a nosepiece 10 screwed on to a sleeve 12 which has two parallel fins 16. The sleeve houses a bar 20 which has a hollow piece 22 on its forward end, said piece having a frusto conical internal surface against which jaws 24 and 26 are pressed by a spring 28. The bar 20 extends rearward through a hole 30 in the sleeve and is urged forwards by a spring 32 so that the piece 22 abuts the end of the nosepiece 10, the jaws being held apart. The rear portion 42 of the bar has a collar 44 with grooves 48, 50 for receiving collars 92 and 94 mounted on levers 52 and 56 of the lazy tongs mechanism which levers are pivoted on the fins 16. A control handle device D is situated at the end of the lazy tongs mechanism remote from the nosepiece 10 and comprises a first U-shaped member 96 pivoted to the limbs 68, 70 of the lazy tongs mechanism and provided with a slot 100 through which passes a pin 102 fixed to the limbs 72, 74 and a second U-shaped member 104 having an inner U-shaped part 106 secured thereto and pivoted to the limbs 68, 70 by a pin 116, said part having a slot 118 through which passes a pin 120 on the limbs 72, 74. In operation, the mandrel of a blind riveting assembly is inserted between the open jaws 24, 26 and the operator squeezes the device D to shorten the lazy tongs and move the bar 20 and piece 22 away from the nosepiece sufficiently to allow the jaws to grip the mandrel. The operator then inserts the rivet into a hole in the work and thrusts the device D towards the nosepiece, collapsing the lazy tongs and setting the rivet. After setting the broken-off part of the mandrel still gripped between the jaws is ejected into a receptacle by the operator releasing his squeeze on the device D whereupon the tongs mechanism extends under the action of the spring 32 and the jaws release the mandrel when they abut the nosepiece 10. Specifications 348,818, 490,047, [both in Group VII], 504,928, 507,358, 568,013 and 613,882, [Group VII], are referred to.