Patent GB-191304720-A (GB)
Title: Method of and Apparatus for Laying Concrete or Asphalt Paving Materials.
Inventor: OSTRANDER ALFRED IRVING
IPC: E01C19/46
Filed: 1913-02-24
Granted: 1914-02-24
Abstract: 4720. Ostrander, A. I. Feb. 24. Tar-macadam, plant for malcing; materials, picking up and mixing with binder laying down materials, machines for.- Relates to road-paving machines, and consists of a power-driven machine which, as it moves forward, is adapted to pick up paving-materials from the roadway and feed them to a mixer mounted on the machine, the mechanism for picking up and feeding the materials having (1) scoops adjustable in height with respect to the road, (2) powerdriven elevators to receive the material from the scoops and elevate them to the mixer, and (3) means for causing the scoops to deliver the materials uniformly to the elevators. In the form shown in plan in Fig. 1 and in side elevation in Fig. 2, the apparatus is mounted on a wheeled power - driven vehicle which is adapted, as it advances along the middle of the road, to pick up paving-materials, such as crushed stone and sand, laid in intermittent piles Y, Z on the road bed. For this purpose, it is provided with a pair of detachable and loosely-mounted wheeled scoops 10, 11 which are prevented from appreciable lateral movement by a stop a<6> on the vehicle frame. The scoops carry road wheels 16, mounted on levers 17 which are folded back against adjustable stops on the vehicle frame when the scoop is in operation. The material which enters each scoop travels up an apron 25, Fig. 1, and plates 26, 27, 28 successively steeper, all of which converge to an opening of adjustable height at the bottom of the forward end of a chamber 24, in which is situated the lower end of a bucket elevator 8 or 9 driven from the engine A<3> which propels the vehicle. These elevators, which are loosely connected to the scoops at their ends, and to the vehicle frame at their upper ends, receive the materials as these pass into the chambers 24, and convey them to hoppers a<3>, a<4>, which feed them, along with cement or other binder, which is introduced by hand through a hopper a<5>, to a mixer a<2> containing a paddle shaft driven from the engine A<3>. Owing to the peculiar construction of the scoops, the feeding of the materials is rendered continuous as the scoops pass through the intermittent piles on the road-beds. The mixture is delivered from the mixer to a swinging conveyer C, and thence to a hopper, which deposits it on the roadway in contiguous sections z, which are compacted by a roller carried by the swinging frame but this distributing - mechanism forms no part of the invention. In a modification, shown in Fig. 7, for laying sheet asphalt pavement, sand is picked up from the pile z by a scoop 75 and conveyed by a bucket elevator 77 to a hopper 76, and thence by an elevator 81<a> to a hopper 88, from which it is fed to a measuring hopper 89, and thence to a rotary dryer 85, which is driven from the engine A<3> and is heated by liquid fuel supplied to a burner 91 from a taok 90. The sand is then delivered to a batch - mixer 81 supplied with liquid asphalt, whence the resulting mixture is distributed as before. A further modification having a rotary mixer, suitable for preparing an asphalt concrete pavement, is described.