Patent GB-190409070-A (GB)
Title: Improvements in Thrashing Machines.
Inventor: STANFORD CHARLES MAURICE
Filed: 1904-04-20
Granted: 1905-03-02
Abstract: 9070. Stanford, C. M., ani Aldous, J. April 20. Thrashing - machines.- A thrashing - machine fitted with seed-drawing apparatus of the kind described in Specification No. 1650, A.D. 1899, is provided with a special arrangement of shakers and sieves and an apparatus for throwing the seed from the huller to one of the dressing-shoes. The shakers consist of a series of perforated boards s or sets of splines or metal rods each fixed to an arm s<1> secured to a spindle s<2> and fitted with a balance weight s<13>. These spindles are provided with cranks s<3>, Fig. 4, and every alternate spindle 1, 3, 5 has its crank fastened to a bar s<4> which is attached by a link s<6> to a crank on a spindle s<8>. The other spindles 2, 4, 6 are connected in a similar way to a crank on the other end of the spindle s<8> placed at 180‹ to the former. By this means, the boards s are given a reciprocating motion, and when one set are rising, the others are falling. To prevent the straw &c. from passing between the boards, canvas, bellows-leather, or other flexible material is secured to the front edge of one board and the rear end of the next, or, as shown in Fig. 1, a metal plate is fixed to the rear end of each board and projects below the front edge of the next. The spindle next the front of the machine carries a plain board to prevent the straw from coming into contact with the spindle s<8>. The corn &c. passing through the boards s and the concave falls into the tray T and thence on to the sieve b<1>, which is preferably constructed of a series of perforated boards, arranged in shallow steps slightly inclined in the opposite direction to the incline of the sieve as a whole and which separates the seed, seed pods, and certain impurities from the straw, stalks, and cavings. The fine seed which passes through the higher end of the sieve b<1> falls on a sieve b<2> which separates the plantain, which is conveyed away by the tray b<10>. The rest of the seed falls on the tray b<6>and over the adjustable delivery edge b<7>, where it meets a blast of air from the fan c, which blows the light seed, pods, and dust on to the sieve b<5> to separate the dust, the seed being delivered to the huller. If there is a large quantity of small seed, a sieve b<15> is used, the seed being passed to the thrower ; any matters blown beyond the sieve b<5> fall into the trough b<12> and are conveyed away, The heavier matters falling over the edge b<7>, fall on to the slope b<8> and thence into the sieve b<3> which separates the impurities and lets them fall to the ground, the good seeds &c. falling on to the sieve b<4> which separates the dust and passes the seeds through the shoot b<11> to the hulling-cylinder E. If a large quantity of seed is drawn in thrashing, an extra sieve is provided which separates the drawn seed and sends it direct to the thrower D. The latter consists of blades fixed on a spindle which throw the hulled seed up a shoot to the dressing-shoe F, Fig. 3, where it falls on the sieve f<1>; anything passing over this sieve falls into the chaff bagger G while that which falls through passes to the sieve f<3>. The lighter part passes over this sieve or is blown over it by the blast from the fan H, and falls into the spout G, while the heavier part falls against the boards f<4>, f<7> and is guided either on to the sieve f<8> where it meets what has passed through the sieve f<3>, or on to the sieve f<9>, through which undrawn seed passes and is returned by the trough f<13> to the huller. That which passes through the sieve f<8> passes to the sieve f<12> which separates the dressed seeds into "firsts" quality, which passes into the shoot f<14>, and "seconds" quality, which passes into the spout f<15>. For heavy straw crops, ordinary box shakers may be used, carried on dip cranks instead of the arrangement described, or the rear ends of the boxes may be carried on spring arms or rollers or a bar z<1> as shown, travelling in long staples z<2>. Fig. 9 shows the shape of the crossbars of these boxes. The shoes B, F and the tray T are shaken by means of the crank s<12>.