| 摘要 |
1,225,870. Cleats. C. H. ARNOLD. 6 Aug 1968 [29 May, 1968], No. 37447/68. Headin E2A. A device for gripping a flexible line 24 such as a rope comprises in combination, means 50, 50' having transverse members 58, 74 extending therebetween positionable on opposite sides of the line, means 26, 26' for applying a torque to rotate said first means so as to move said members transversely with respect to said line to contact the line and haul it into a hitch such that the line is securely gripped by the device, said first means being constructed whereby counter-torque can be simultaneously applied thereto for controllably releasing said line. In the construction shown the means 50, 50' are a pair of circular side plates, and their shapes allows them to be rotated manually to apply the counter torque; the member 58 is a projection from the plate 50 which extends through an opening in the plate 50' its end portion being welded to the plate 50'. The member 74 is a pin which is slidable in a bore 78' of the plate 50' and which has a snap ring 84 disposed in a circumferential recess which engages a shoulder at the end of a counter bore 78 in the plate 50 when the pin 74 is in its fastening position. The means 26, 26' for rotating the plates 50, 50' consist of a pair of control lines which are respectively secured to the plates 50, 50' and extend in circumferential grooves in the plates. The free ends of the control lines are connected together by a clevis 32. Each of the plates 50, 50' has a hub 59, 59' and attached to each hub is a generally triangular plate 90, 90' each plate being attached to its hub near one apex and the plates being connected together near their other apices by tubular stems 102 on which rollers 100 are mounted. One roller bears on the line 24 and the other on the control lines 26, 26' and in the operative condition of the device the plates prevent withdrawal of the pin 74. In the inoperative condition of the device the plates can be rotated to align notches in the plates with the pin 74 to enable the pin to be withdrawn so that the flexible line 24 can be positioned between the projection 78 and the pin 74. In Fig. 1 the device is shown for gripping the line 24 which is supporting a platform 10 the line passing round pulley blocks 17, 19. The control lines are attached to a bracket 28 which is itself attached to a loop 14 of the platform and the arrangement is such that when the device is in engagement with the bracket it is in its releasing position in which the line 24 passes straight down between the projections 78 and the pin 74 with the control lines are substantially contained in the circumferential grooves of the plates 50, 50'. The upper surface of the bracket is arcuate so that it engages the circumference of each plate 50, 50' and the bracket is bifurcated so that the line 24 can pass through the bracket. Other uses of the device are described. |
