Measurement and calculation ruler

A technology of measuring and measuring, applied in the field of measuring slide rules, can solve the problems of unintuitive and inconvenient teaching of geometric figures

Inactive Publication Date: 2012-08-08
冯耿
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Teaching geometry is neither intuitive nor convenient

Method used

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  • Measurement and calculation ruler

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Embodiment Construction

[0019] In order to further describe the present invention, the measuring slide rule of the present invention will be further described below in conjunction with the accompanying drawings, embodiments and methods of use.

[0020] like figure 1 As shown, the measuring slide rule consists of a half-compass (A) with a flat ruler (D), a diagonal ruler (B) and a vertical ruler (C). The semi-compass (A) is slightly larger than the semi-circle, and there is a part for the ruler (D) under the diameter of the semi-compass, and the center is hollowed out along the semi-compass arc scale and diameter to form a crescent shape, and the semi-compass arc scale is on the inside, starting from the flat ruler Point "10" stops at point "0" of the ruler in the counterclockwise direction, and the scale line at the 90° arc of the semicompass (A) is used as the hammer line as a dotted line. Engrave the scale of the ruler (D) under the semicircle diameter of the semicircle (A). There is a small hole ...

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Abstract

The invention discloses a measurement and calculation ruler which is formed by a half-round compass with a leveling ruler, an inclined ruler and a vertical ruler. The half-round compass is slightly greater than a semi-circle and the leveling ruler is under a diameter. The middle part of the half-round compass is excavated into a crescent shape along a half-round compass radian scale and the diameter. The half-round compass radian scale is in an inside position, is started from a ''10'' point of the leveling ruler and is ended at a ''0'' point of the leveling ruler in a counter-clockwise direction. The lengths of the inclined ruler, the vertical ruler and the leveling ruler are equal and are slightly shorter than the length of the half-round compass diameter. The inclined ruler is hinged with the leveling ruler through a hollow rivet, and the inclined ruler and the leveling ruler are connected with the half-round compass into one body. The vertical ruler is movable. The measurement and calculation ruler combines measuring and calculating. A shape and a number are combined together so that geometry teaching is visual and convenient. When learning a geometric figure, a pupil can carry out measuring, calculating, picturing and surveying without a mathematical table, the compass, a triangular plate, the ruler and plane table equipment.

Description

technical field [0001] The invention belongs to the technical field of teaching equipment and relates to a measuring slide rule. The measuring slide rule is used in the teaching of geometric figures, and is especially suitable for primary and middle school students to measure, calculate, draw and measure when learning geometric figures. Background technique [0002] Existing geometric figure teaching equipment includes single-function tools such as demicompasses, compasses, settables, and rulers. Quantity and calculation, shape and number are separated, and mathematical tables and calculators are also needed to calculate trigonometric functions. Teaching geometry is neither intuitive nor convenient. Contents of the invention [0003] The purpose of the present invention is to solve the above-mentioned shortcomings in the prior art, and create a measuring slide rule for the first time, which combines quantity and calculation, and integrates shape and number, so that the te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B5/02B43L13/00G09B23/04
Inventor 冯耿
Owner 冯耿
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