Patent GB-191116538-A (GB)
Title: Improvements in Hay Making Machinery.
Inventor: MAW PERCIVAL TRENTHAM
IPC: A01D78/00
Filed: 1911-07-18
Granted: 1912-03-07
Abstract: 16,538. Maw, P. T. July 18. [Cognate Application, 16,772/11.] Haymaking.-In swath-turners adapted for turning more than one swath, and of the type in which banging tines or forks are controlled by rotary parallel eccentric disks or spiders connected by links or cranked rods, and in which the disks are driven by a single operating-gear from the main axle, the rake or fork heads are attached at or near the ends of the links or rods, so that a line joining the corresponding ends of any two parallel heads situated at the opposite ends of a coupling-bar lies in a vertical plane which is always at an angle to the vertical plane in which the coupling-bar is situated. In a modification in which the disks or spiders are replaced by chain or flexible gearing, the hanging tines of the swath-turner or hay-rake are carried along a triangular or other shaped path, so that their travel forwards when in contact with the crop is greater than their travel backwards when out of contact with the crop. The spiders or disks C, C<1>, Fig. 1, are mounted at their centres on rods e<3>, e<4>, which turn in bearings on the main frame F, and short arms c<1> projecting from the ends of the spider arms or from the disks are connected by parallel coupling-rods c attached to loose sleeves c<2> on the arms c<1>. The near disk c is driven by bevel-gearing e', e' from a shaft e actuited by chain gearing E from the main axle B, and the rake heads c<5>, c<6> carrying the vertical or inclined spring tines d' are arranged at the ends of the rods c and at an angle thereto, being secured by means of a pivot or hinge c<3> and a fixing-pin c<4> so that they may be turned up when the machine is taken over uneven ground. The rake heads may be fixed to the sleeves c<2>, and they may be fixed nearer their centres instead of at the ends. Or the ends of the bars c may be bent parallel to each other and extended beyond their points of attachment to the sleeves c<2>, the tines being fixed to these extended portions. In a modification, the parallel eccentric disks C, C', Fig. 3, are carried by an horizontal supporting-bar F with ends bent parallel and piercing the centres of the disks at right-angles ; these ends may carry extension bars f fixed on the main frame b, b<1>. The coupling-rods, which pierce the disks at right angles, have slip joints c<7> and carry the rake heads c<5>, c<6> at their ends. The coupling-rods may be placed parallel to the main axle. Fig. 4 shows an arrangement in which the disks are replaced by flexible gearing in which a chain g is carried over chain-wheels G. The ends c8 of the coupling-rods c are bent parallel at right-angles to the vertical plane in which the chain g travels and enter slip bearings fixed to the chain links. Rake heads c<5> carrying hanging tines d' are fixed to the parallel ends of the rods c, and the chain travels in a triangular or other shaped path as shown in Fig. 5, so that the forward travel of the tines is longer than the backward travel. In another arrangement, the ends of the coupling-rods are bent parallel to each other and pierce the disks at right-angles, and are continued as tine bars. Fig. 7 shows one end of a side-delivery rake in which the coupling-rods c with parallel ends c<8> are carried by chain gearing g similar to that shown in Fig. 4, and a complete series of spring tines d<1> is arranged along the whole length of each bar c and continued as at c9 in a straight line beyond the points where the rods are bent at right-angles to the chain gearing. Specification 13,491/10 is referred to.