SU526780A2 - Scales with automatic recording of measurement results - Google Patents

Description

one

The invention relates to the field of weighing technology.

Known scales with automatic recording of the results of measuring auth. St. L 436243 containing a yoke with a cuvette and a tracking system formed from a deflection sensor of the rocker arm, a relay and an electric motor, the yoke being suspended on the blocks with the help of a thread connected to the tracking electric motor, which ensures a constant fixation of the cuvette in space the process of reducing the mass of a substance in a cuvette.

The aim of the invention is to ensure the fixation of the cuvette with the substance in the space B during the process of changing or decreasing the mass of the substance.

This goal is achieved by adding an additional tracking system to the balance with automatic recording of measurement results, consisting of a deflection sensor, a relay and a reversing actuating motor.

The drawing shows a schematic diagram of the scales with automatic recording of results from the skull.

The balance consists of a rocker arm 1, to one arm of which the cuvette is connected with a sample of the material under study 2 mercury contacts 3 and 4, and at the end of the second - a counterbalancing load 5.

2

The yoke 1 is supported by a prism 6, placed on blocks 7 and 8, on the cushion 9. The balance of the cushion 9 is provided by two symmetrically arranged pins 10, which are moved by the weights 1 through the openings of the fixed guides 12. The sensitivity of the balance is controlled by moving the weight 13 along the guide fixed on the yoke perpendicular to

bearing prism 6.

The cushion 9 has in the center a movable block 7, which is connected by a thread through fixed blocks 8 with a regulating drum 14. The regulating drum 14 is driven through

a reducer from a reversible electric motor 15, the automatic activation of which is carried out as the operation of the mercury contacts 3, 16 (or 4, 17) and the intermediate relay 18 (or 19). A continuous recording of the change in mass of a substance is carried out on the recording drum 20, driven by a motor-clock 21 using a stylus attached to the thread. Scales work as follows.

With a change in the mass of the substance of the cuvette 2, a submenu to the rocker 1, rises (or lowers) due to 1 equilibrium; 1, leading to the rupture of mercury contacts 3, 16 (or closure contacts 4, 17). When lifting

the electric beam is interrupted,

normally open contact of relay 18 moves to the normally closed position. When the rocker arm is lowered, the electrical circuit closes and the normally closed contact of the relay 19 changes to the normally open position. In both cases, the voltage is applied to the regulating reversing electric motor 15, which causes the regulating drum 14 to rotate, and the thread holding the suspension system of the scale is pulled off or twisted. Lowering or raising the suspension system of the scale leads to the closure {or rupture) of the mercury contacts 3, 15 (or 4, 17) and to the triggering of the relay 18 (or 19).

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The cuvette 2 returns to its original position. The suspension scale is stabilized.

Claims (1)

Invention Formula Scales with automatic recording of measurement results by ed. St. No. 436243, characterized in that, in order to improve the accuracy of fixation of the cuvette in space, they incorporate an additional sensor for the rocker arms and the relay connected to the executive reversible electric motor of the tracking system.