Patent GB-702480-A (GB)
Title: Improvements in or relating to transportation device for the vertical hauling and conveying of loads along a carrier cable
IPC: B61B12/12
Filed: 1951-06-18
Abstract: 702,480. Overhead ropeway ; load engaging means ; cable grips. WYSSEN, J. June 18, 1951 [June 21, 1950 ; June 8, 1951], No. 14361/51. Classes 78 (2), 78 (4) and 104 (2) A carriage runs on wheels 3 and 4 on a cable T and has a hoisting and transporting cable F passing over pulleys 36 and 31 to a load hook and when the carriage stops at a delivery station a hydraulic piston actuates a rod 19 to release a linkage supporting the joint of rods 32, 33 and so release the load hook and cause the carriage to be clamped to the cable. The carriage comprises spaced plates and a slide 35 mounted on rollers 26, 28<SP>1</SP> and pivoted to the pair of hinged rods 32, 33 pivoted to the plates. During motion an eccentric mounted on the axle of pulley 3 continuously rotates and reciprocates a piston 9 to force fluid past check valve 6<SP>11</SP> into chamber 7<SP>1</SP> to maintain the piston 14 in position against the action of a spring 15. When motion ceases fluid escapes from chamber 7<SP>1</SP> into chamber 7<SP>11</SP> above the piston and the spring is released causing linkage 17, 18 to rotate the rod 19 to release the device locking the joint of the rods 32, 33, and so release the load hook head. The locking device comprises twin levers 24 pivoted to the slides which engage the cammed axle 30 and cammed disc 28 one cam of which supports the rod 32. The rod 19 rotates the levers 24 to remove disc 28 from the rod 32. Simultaneously a lever 39 pivoted to the slide rotates to release a lever 37 which engages a pawl 42 which is secured to an arm 43 secured to a rod 44 to effect clamping of the carriage on the cable. The rod 44 has two opposed threads carrying nuts 45, 46, to which are pivoted plates 51 carrying the clamps 51<SP>1</SP>. The plates are spaced apart by members 52 having lugs 53 for a cross rod 54. The rod 54 has a bore for a rod 55 connected to a wedge connected to a linkage 57 and slotted plate 58. A pin 59 on the rod 43 engages the slot and when the rod 43 is rotated the link 57 is moved to cause the wedge to enter between the members 52 and maintain the clamps 51<SP>1</SP> in clamping engagement with the rope. In Fig. 32 an alternative clamping arrangement is shown in which releasing the lever 24 causes rods 126 to pull clamps 125, the rollers 141 which are spring connected together over the cable, contact cams 139 to press the clamps into engagement with the rope. The load carrying device comprises two plates 62 pivoted to the slide. Cammed members 63 are pivotally mounted between the plates and are connected by jointed levers 65 to the plates 62. A spring 70 and rod 68 in a guide 69 press downwardly on the joint which is supported by cross rod 71 on plates 72 secured to the rod 32. Releasing the locking device lowers arm 32 shortens the telescopic arm 33 and lowers plates 72 removing rods 71 from the joint which collapses and draws the cams of levers 63 from under the load hook head, 87. The load hook collar 78 is secured to a member inside the casing 92 to which member the ends of the hoisting cable are clamped. A stem of the load hook head 87 is supported against spring action on the member in the casing. The casing has side apertures for rollers which are spring urged outwardly against the support plate 96. When drawing up the load the plate lifts the locking and supporting device and locks the load carrying device. For a slack lowering cable the casing 92 is screwed up to the collar 78 of the load hook. To carry and lower heavy loads on a taut cable the casing 92 is rotated to slacken the spring and raise the casing, the side rollers being supported on a projection on the stem. With the load attached the load hook head is drawn up to displace the locking levers 75 and levers 65<SP>1</SP> are moved outwardly. When the load hook head rests on the cams 63, the lever 65<SP>1</SP> rests exteriorly on the levers 75. The casing 92 is moved downwards through the adjusted amount to displace the rollers and release the plate 96 which falls to the collar 78. The load is then transported to the delivery point. Since the levers 65<SP>1</SP> are held by the levers 75 the load is not released until a further short lift is given to the load when the load hook head 87 slews the levers 75 and releases the levers 65 to withdraw the cams 63 then the load is lowered. When removing the load the plate 96 is restored to its initial position. In. such an arrangement should the carriage be accidently stopped on the cable the load hook is released, to prevent this from happening a distance release device actuated by a roller on the cable T and actuating levers 24 through linkage is incorporated so that the locking device can only be released when a certain distance has been traversed. A distance and time release may be combined, each device causing separate movement of a link, actuating levers 24, the movements being in two directions at right angles. The time release may be mechanically or electrically operated or by centrifugal force or electromagnetically.