Vibratory shakers

A number of less expensive sieve shakers are on the market, such as the Dynamic, by Soiltest Inc., Chicago the Cenco-Meinzer, by Central Scientific Co., Chicago the Tyler portable, by W. S. Tyler, Inc., Mentor, Ohio and also a number of electromagnetic vibratory shakers. The latter should be used only when strict comparability with other tests is not required, since it is difficult to be sure that identical intensity of vibration was present in the tests being compared. 

Flour and Feed Meal The roller mill is the traditional machine for grinding wheat and rye into high-grade flour. A typical mill used for this purpose is fitted with two pairs of rolls, capable of making two separate reductions. After each reduction the product is taken to a bolting machine or classifier to separate the fine flour, the coarse product being returned for further reduction. Feed is supphed at the top, where a vibratory shaker spreads it out in a thin stream across the full width of the rolls. 

A 250-ml. distilling flask A, with the side arm bent as shown in Fig. 18, is clamped in a vibratory shaker. Two... 

Because of the small dimensions of the apparatus no special mechanical apparatus is required for discontinuous shaking in micro chemistry. For continuous shaking, any of the usual laboratory shaking machines can be used, vibratory shakers being particularly suitable for micro work.63... 

Vibratory sieve Shaker for micro precision sieving... 

Laboratory sieving devices vibratory sieve shaken for micro-precision sieving, Analysette 3, rotary sieve shaker, Analysette 18... 

Tumbler, jar, drum, or cannon ball mills Szegvari attritor vertical mills and other vertical stirred ball mills Planetary Fritsch and Retsch model mills Shaker (vibratory) SPEX model mills... 

Consider a simple sprite-mass system, as shown in Figure 8.4. The spring—mass system shown could represent a very simple model for a vibratory system, such as a shaker or a... 

The vibratory trough accelerates the material to such an extent that, when the forward movement of the trough is greatly retarded just before the end of the stroke, the material "becomes airborne" and travels in a parabolic trajectory until it falls onto the bottom of the trough, when it receives a fresh impulse, and so on. In this way it hops along, as it were. On the other hand, on the shaker conveyor the material is not thrown up into the air, but merely slides along, because on the return stroke of the conveyor trough the static friction between it and the material is temporarily cancelled. 

Frozen Coal. Successful equipment for unloading frozen coal includes steam-heated thawing sheds, oil-fired thawing pits, and the radiant-electric raUroad-car thawing system. Another device is a car shakeout, in which a motor-driven eccentric shaker clamped to the top flanges of the car transmits a vibratory motion to the car body. 

Fixture, vibratory pan A fixture for coating small parts by placing them in a pan that is vibrated, causing the parts to move about and allowing 100% coverage of the parts. Also called a Shaker table. 

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