DE38913C - Table sieve with double eccentric movement - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

CLASS 45: Agricultural tools.

CH. LAUE in DORTMUND. Table sieve with do ρ pelter eccentric travel un;

Patented in the German Empire on May 30, 1886.

The eccentric vibrating screen shown in Fig. 1 and 2 is a smooth, inclined table screen a, which is mounted on the drive shaft c at the end by two eccentrics b 'b " firmly connected to the same and at the lower end hinge-like by the eccentrics sitting on the shaft d e'e "is supported. The shaft d is driven by the two conical pairs of wheels ff " and the shaft g by the drive shaft c . The shafts c and d make an equal number of revolutions per minute. The eccentrics b 'b" and e' e " have double discs, whereby the eccentricity can be adjusted to zero.

Depending on the position of the eccentrics b 'b " against e'e" , the following three main types of movement result:

1. The eccentrics b 'b " and e'e" are attached in the same sense on their shafts c and d and have the same eccentricity. In this case each point of the sieve describes a circle in the vertical direction, Fig. 3.

2. The eccentrics b'.b " and e 'e" are attached in the same sense to their shafts c and d , but have different eccentricities. The sieve describes a vertical circle only in its uppermost points, on the other hand a lying or standing ellipse in every other point, depending on whether the eccentrics b 'b "have a larger or smaller stroke than the eccentrics e'e" , FIG. 4.

3. The eccentrics b 'b " are attached in opposite directions on their axes c and d , whereby the eccentrics can have the same or different stroke. In the first case the sieve describes a vertical circle at both end points and from there ellipses, which in pass the center in a rectilinear oscillirende movement, whereas in the second case only go to the upper end points of a circle and at the bottom an ellipse lying or upright case, the latter, as well as _the;. district at a certain point in the longitudinal direction of the wire in an straight, oscillating movement over, Fig. 5.

The above-described peculiar types of movement of the eccentric vibrating screen cause the following advantages over all previously known constructions of material and vibrating screens:

The speed of the eccentric vibrating screen can be lower than that of other vibrating screens, because the screen material to be sorted is when the direction of movement of the screen is reversed from lifted upwards downwards due to its moment of inertia from the latter and thereby the friction between the screen material and the screen is reduced.

The lifting of the material to be sieved and falling back freely on the sieve prevents clogging the sieve openings, whereby the performance of the sieve is increased.

By adjusting the lifting height of the eccentrics b 'b " and e'e" , the greater effect of the sieve can be relocated to the upper or lower end of the same. The lift of the material to be sieved from the sieve or the efficiency of the same is greatest when the lower eccentrics e 'e "have a larger stroke than the upper b'b" and each point in the longitudinal direction of the sieve describes a vertical ellipse. .

Claims (1)

The movement of the material to be sieved on the sieve can take place quickly and slowly, depending on whether the eccentrics b 'b " and e'e" are attached to their shafts c and d in the same or the other way round and how this corresponds to the openings of the sieve. Pa te ν τ claim: An inclined table screen a, which is mounted at the upper end with the two adjustable eccentrics b 'b " on the shaft c and at the lower end with the adjustable eccentrics e'e" located on the shaft d is connected in a hinge-like manner, the shafts c and d make the same revolutions per minute and the latter is driven by the former through the shaft g and the two conical wheels y / "or by some other device. The sieve can also be driven at the lower end instead of at the upper end as shown. For this purpose ι sheet of drawings.