RU182938U1 - DEVICE FOR MEASURING INTERNAL DIAMETERS AND AREA AREA - Google Patents

Abstract

The utility model relates to measuring technique and can be used to measure the inner diameters of the cylindrical holes of various products and their corresponding circumferential areas, mainly in construction. A device for measuring internal diameters and areas of circles contains a hollow truncated cone and a handle fixed perpendicular to its base, ring transverse risks are applied outside the cone and along it are linear scales of the corresponding digital values of the diameters and areas of the circle. The use of the proposed device can improve the measurement efficiency of both the values of the internal diameters and the corresponding areas of the circumference of the cylindrical holes of various products. This device is universal and can be used to measure cylindrical holes of products and structures made of various materials. The technical result is the simplicity of the design and implementation of the measurement process. 1 ill.

Description

The utility model relates to measuring technique and can be used to measure the inner diameters of the cylindrical holes of various products and their corresponding circumferential areas, mainly in construction.

A known device for measuring linear dimensions inside products containing two articulated spring-loaded levers with pointed measuring tips, a vernier, a ruler, a housing with a groove and a basing element with a stop. In this case, the spring-loaded levers are fixed on a ruler mounted in the housing with the possibility of vertical movement along its groove, and the base element is made with the possibility of centering along the inner diameter of the product (RU 2319946, IPC G01B 3/00 publ. January 27, 2008).

The disadvantages of the known devices are: a certain technical complexity of the design; the presence of a stop does not allow the measurement of the internal linear dimensions of deep and through holes; when making measurements, both hands of the person taking the measurement are involved.

The closest in technical essence to the proposed one is a caliber for measuring the diameter of cylindrical grooves having a three-beam base containing two support legs and a central beam, on which a two-shouldered gauge, one shoulder of which is short, is pivotally mounted to rotate in the base plane the measured diameter, and the other is long - the maximum measured diameter (RU 2267741, IPC G01B 3/46 publ. 01/10/2006).

The disadvantages of the known device is a certain technical complexity of the design and implementation of the measurement process.

The main fundamental differences of the proposed device for measuring the inner diameters and areas of circles from existing analogues are the following:

- annular transverse risks are applied on the outer working surface of the hollow cone;

- along the upper surface of the cone there are two linear scales with digital values of the internal diameters and the area of the circles of the corresponding ring patterns.

This design of the device is technically simple and provides a minimum of manipulation during measurements, the convenience of their implementation, and the measurement process is reduced only to taking readings simultaneously from two scales to determine the digital value of the inner diameter and the corresponding circumference.

The technical result of the utility model is the simplicity of the design and implementation of the measurement process.

The specified technical result is achieved in that the device for measuring the inner diameters and areas of the circles contains a hollow truncated cone and a handle fixed perpendicular to its base, ring transverse risks and linear scales of the corresponding digital values of the diameters and areas of the circle are applied on the outside of the cone.

The proposed device is illustrated by the general view diagram shown in FIG. one.

A device for measuring internal diameters and areas of circles contains a hollow truncated cone 1 and a handle 2 fixed perpendicular to its base. On the outer working surface of the cone 1 there are ring transverse risks 3, and linear scales are located along the upper surface of the cone, above and below the transverse line 4 . Along cone 1, on top of line 4, there is a scale of numerical values of the diameters of the corresponding annular patterns 3, indicated in FIG. 1 by the letter D. Along the cone 1, from the bottom of line 4, there is a scale of digital values of the area of circles corresponding to the diameter of the annular patterns 3, indicated in FIG. 1 letter S.

The device operates as follows. When making measurements, the device held by the handle 2 is inserted by the narrow part of the cone 1 into the measured cylindrical hole, until the outer working surface of the cone 1 is in close contact with the inner surface of the measured hole. In this case, one of the annular patterns 3 of the cone 1, which coincides with the plane of the outer end of the measured hole, will correspond to its diameter and the digital value of this ring hazard plotted on a linear scale D. At the same time, from the plotted digital values of the values on the linear scale S, it is possible to determine the circumference of the circle corresponding to a given diameter D, without additional calculations. After completion of measurements, removal of the device is carried out in the reverse order.

The use of the proposed device can improve the measurement efficiency of both the values of the internal diameters and the corresponding areas of the circumference of the cylindrical holes of various products. This device is universal and can be used to measure cylindrical holes of products and structures made of various materials.

Claims (1)

A device for measuring internal diameters and areas of circles, containing a hollow truncated cone and a handle fixed perpendicular to its base, characterized in that the ring transverse risks and linear scales along their digital values of the diameters and areas of the circle are applied outside the cone.

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