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Centralized positioning assembly for sextant indication arm

A technology of center positioning and sextant, applied in the direction of sextant, etc., can solve the problems affecting the measurement accuracy and the drift of the screw center point, so as to improve the accuracy and prevent loosening

Inactive Publication Date: 2014-01-01
CHANGZHOU HAOMAI MARINE EQUIP TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The center positioning of the existing sextant indicator arm only adopts three-point support of set screws, but in the actual operation process, the movement of the screws will cause the center point to drift and affect the measurement accuracy

Method used

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  • Centralized positioning assembly for sextant indication arm

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Embodiment Construction

[0011] See figure 1 As shown, a center positioning assembly for a sextant indicating arm has a dial 1, and the end of the dial 1 has a round hole 2 that matches the center bearing, and the center bearing is connected to the center bearing through the round hole 2. The dial 1 has a clearance fit, and the round hole 2 communicates with the threaded hole 3 for fixing the center bearing; the top of the dial 1 is placed in the threaded hole 3 with two set screws, one inside It is a tapered end static set screw, and the outside is a copper flat end static set screw, and the threaded holes 3 have three.

[0012] The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc...

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Abstract

The invention discloses a centralized positioning assembly for a sextant indication arm. The centralized positioning assembly is provided with a dial, wherein the end part of the dial is provided with a circular hole which is matched with a centre bearing, the center bearing is in gap junction with the dial through the circular hole, the circular hole is communicated with a threaded hole for fixing the center bearing, a cone point set screw is arranged in the threaded hole and is used for fixing the center bearing, and a copper pointless screw is additionally arranged behind the cone point set screw and can effectively prevent an inner screw from loosening, so that the center bearing and the circular hole are arranged on a same axis, and the measurement accuracy is also improved.

Description

technical field [0001] The invention relates to a nautical surveying and mapping instrument device, in particular to a center positioning assembly for a sextant indicating arm. Background technique [0002] In the field of navigation, a sextant is an optical instrument commonly used to measure the angle between two distant targets. It is usually used to measure the angle between the sun or other celestial bodies and the sea level or horizon at a certain moment, so as to quickly know the latitude and longitude of the position of the ship or aircraft. The center positioning of the existing sextant indicator arm is only supported by three-point set screws, but in the actual operation process, the movement of the screws will cause the center point to drift and affect the measurement accuracy. Contents of the invention [0003] The purpose of the present invention is to solve the above-mentioned existing problems, and provide a center positioning assembly for a sextant indicat...

Claims

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Application Information

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IPC IPC(8): G01C1/08
CPCG01C1/08
Inventor 朱亮狄丹岩
Owner CHANGZHOU HAOMAI MARINE EQUIP TECH
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