SU59057A1 - Device for closing the electrical circuit of indicating devices in measuring devices with automatic indicators - Google Patents

Description

The device for closing the electrical circuit of the indicating devices in measuring instruments with automatic

pointers.

It was filed on July 7, 1939 in the NKSM for L9 25353. Published 28 February 1941.

The proposed konstruktiv1 execution of the device for closing the electrical circuit of pointing devices in measuring devices with automatic indicators can be used to automate various kinds of processes and, in particular, in mechanical engineering as a speed meter for linear dimensions of parts.

The schematic drawing shows a perspective view of the proposed device.

As can be seen from the drawing, besides the main arrow-index 1, the device is equipped with several additional contact arrows 2, 3 and 4 (the number of arrows depends on the number of measurement steps) mounted on the spiral springs 5, which tend to turn each of the arrows clockwise. When the arrow 1 is against the zero division of the scale, all the contact arrows 2, 3, 4 abut the plate b, mounted on the arrow 1. A contact scale 7, 8 and 9 is installed in the insulating base (their number corresponds to the number of contact arrows ) of different lengths, each of which is intended to hold the corresponding arrow while moving all of them together with arrow 1 along the scale. Each contact arrow and corresponding stop are included in the chain of the pointing device assembled according to any of the known schemes.

In the process of measurement, the main arrow 1, moving, takes a position corresponding to the measured value, and the contact arrows, moving after it under the action of its springs, are held up on the corresponding stops 7, 8 and 9.

The drawing shows the position when the measurement hand is between the second 8 and third 9 stops; in this case, two contact arrows 2 and 3 are retained by stops 7 and 8, and the third arrow 4 is held by the bar 6.

Depending on the level at which the measured value is located, this or that number of contact arrows remains on its stops.

In principle, the proposed device can be designed on

base of any switch instrument. In devices of the type of lever-switch, i.e., in those that do not work according to equilibrium moments, or in devices having a significant torque, the device can be applied most easily and does not cause changes in their graduation.

The subject matter of the invention.

A device for closing the electrical circuit of the indicating devices in measuring devices with automatic indicators, characterized by the use of spring-loaded contact arrows 2, 3, 4 ... (by the number of contacts) moving together with the pointer 1, in order to close the electric circuit of the indicating devices when the retention of the contact arrows by the stops 7, 8, 9 (according to the number of contacts) upon reaching the arrow-pointer of the corresponding scale division., -.