Patent GB-1010977-A (GB)
Title: Method and apparatus for distributing concrete
IPC: E01C19/48
Filed: 1963-05-29
Abstract: 1,010,977. Endless conveyers. H. J. MAGINNISS. May 29, 1963 [Aug. 30, 1962], No. 21445/63. Heading B8A. [Also in Division E1] A concrete distributer comprises an upstream and a downstream conveyer assembly 10, 11, each adapted to transport concrete, and a laterally movable main carriage 12 arranged to support and maintain the discharge end of the upstream conveyer assembly 10 in overlapping relationship with the downstream conveyer assembly 11 while allowing relative articulation between the conveyer assemblies. The upstream conveyer assembly 10 comprises two longitudinal channel members 20, 21 with an endless belt running therebetween and around two end drums, the upstream drum being chaindriven from a motor 25 protected by a coverplate 46. The belt is supported between drums by idler rollers disposed to give the belt an arcuate cross-section. A charging hopper 15 is detachably mounted above the belt at its upstream end and has its downstream wall formed by a vertical plate 51 which may have a notch to control the flow of concrete. The upstream conveyer 10 is mounted at its charging end on an upstream carriage assembly 13 which comprises two dollies 60, 90 having wheels 75 running on the ground or on forms 79, 92 between which the concrete is to be spread, and connected by an adjustable member comprising hollow rectilinear sectioned members 93, 94 secured to the dollies and telescopically received in a circular pipe 95, and a vertical round post 61 mounted on the dolly 60. The post has a vertically adjustable collar 63 which supports a cap 65 rotatably mounted on the post and incorporating a transverse sleeve 66 which is pivotally pinned to brackets 69, 70 extending downwardly from the upstream conveyer assembly. The downstream conveyer assembly 11 is basically the same as the upstream conveyer assembly 10 but the downstream end incorporating a guide spout 140 and vibrator 142, is supported on, and movable along an adjustable member 149 supported between two dollies 145, 146, as with the upstream carriage assembly. The conveyer 11 is supported between legs 158, 159 of a support bracket which is pivotally mounted on a vertical pin extending from a wheeled carriage, Fig. 12 (not shown), which rides along the circular member 149. The wheeled carriage is vertically stabilized by further wheels extending on arms from the carriage and engaging the underside of the member 149. The main carriage assembly 12 comprises two adjustable members 187, 188 bracing between two dollies 185, 186. The wheels of the dollies are chain driven from motors 210, which are energized by a generator 212 driven by an engine 213, both mounted on a table 211, secured to the two bracing members 187, 188. The main carriage truck assembly 215 comprises two axles 216, 217, transverse to the bracing members 187, 188 and terminating in rollers 219 which ride on the circular members 187, 188. A frame 221 secured between the axles carries a vertical trunnion pin 222 which pivotally receives a rectangular frame assembly 223. A whippletree beam 229 is pivotally mounted at 230 to each side of the frame 223 and has wheels 232 which engage and slidably support the side channel members 120, 121 of the downstream conveyer assembly 11. An annular collar 240 is welded transversely to a rotatable horizontal top member 228 of the frame 223 and incorporates a circular raceway in which runs a slip ring integral with wings 252 secured to the discharge end of the upstream conveyer assembly. An elbow 17, trough 253 and snout 256 form a splash guard between the discharge end of the upstream conveyer and the receiving surface of the downstream conveyer. The main carriage truck assembly is driven along the members 187, 188 by a cable and pulley system energized by the motor on the dolly 186. Switch trips fitted to the cable cause the drive to the cable to be reversed as the trip approaches either dolly 185, 186. A similar drive could be used on the wheeled carriage supporting the discharge end of the downstream conveyer. A screed board 216 downstream of the downstream conveyer is carried between dolly frames 218, 219 constructed similarly to, and connected rigidly to, the dollies 60, 90 and is vertically adjustable and carries vibrators 221.