Improvements in and relating to shears and scissors

摘要

1,090,631. Shears &c. WILKINSON SWORD Ltd. Jan. 1, 1965 [Jan. 4, 1964; Oct. 10, 1964], Nos. 468/64 and 41436/64. Heading B4B. A pair of shears or scissors comprises a coupling mechanism 4 for transmitting a gripping action on a movable handle 10 relative to a fixed handle 5 into shearing or cutting motion of blades 1 and 2, the mechanism 4 comprising abutment surfaces 18a, 29 on a pivotal arm 13 for respectively engaging a peg 19 secured to the blade 2 and a nose 28 on a member 26 secured to the blade 1, the blades being pivotable about a pin 22 surrounded by a spring 21 one end of which is accommodated in an aperture 20 in the arm 13 and the other end of which abuts against a leg 25 of the member 26. A housing 3 for the mechanism 4 is integral with handle 5. Secured to the handle 10 is a plate 12 which has a projection 14 co-operable with a pin 8 of a catch member. Means for locking one or both blades comprises a disc (32), Fig. 3(a) (not shown), rotatable by a rod (31) accessible from outside the housing, the disc having a face cam (33) which engages spring-biased rods (34, 35). Alternatively, a rotatable disc (40), Fig. 4(a) (not shown), has three radial protrusions (41, 42, 43) for respectively engaging three rods (46, 47, 49). In a modification, the abutment surfaces of the coupling mechanism are formed on arm (61), Fig. 5 (not shown), provided on the movable handle (54), one surface being engageable by a peg (60) projecting from an angle bracket (57) secured to one blade (50) and the other surface being engageable by a peg (55) secured to the other blade (51), the arm (61) being pivotally movable about a pivot pin (62) secured to a block (56) rigid with the fixed handle (53). The blades are pivotable about a pin (52), Fig. 6 (not shown), which extends downwardly from the block (56) and the upper side of the angle bracket (57) is pivotally mounted to the upper side of the block (56). A housing (65), Fig. 5 (not shown), enclosing the coupling mechanism is integral with the fixed handle (53) and a spring (63), Fig. 6 (not shown), biases the blades to the open position.