Unlock instant, AI-driven research and patent intelligence for your innovation.

Three-arm protractor

A technology of indexer and worm, which is applied in the field of measurement and drawing tools, can solve problems affecting the accuracy of measurement, and achieve the effect of simple structure and reasonable design

Inactive Publication Date: 2014-01-01
CHANGZHOU HAOMAI MARINE EQUIP TECH
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practical applications, the sextant will produce deviations due to various reasons in measuring the latitude and longitude of the sea-going ship or aircraft, which will affect the accuracy of the measurement.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Three-arm protractor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] See figure 1 As shown, a three-bar indexing instrument has a dial 1, and the center of the dial 1 is sleeved on one end of the connecting ring assembly 2 through the central needle part 5, and the other end of the connecting ring assembly 2 is passed through the indicating plate The fixing pin on the component 7 is threadedly connected with the finger arm component 6, and a worm component 4 is arranged between the connecting ring component 2 and the dial 1, and one end of the worm component 4 is connected to the connecting ring through the indicating plate component 7. The component 2 is fixedly connected, and its other end is connected to the dial 1 through a worm nut 41 , and the worm 42 in the worm component 4 makes a sliding movement along the outer sliding groove of the dial 1 .

[0015] Wherein the connecting ring assembly 2 includes a left-pull connecting ring 21 and a right-pull connecting ring 22; the worm part 4 includes a left worm part 411 and a right worm p...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a three-arm protractor provided with a dial. The axis position of the dial is sleevedly connected to one end of a connecting ring assembly through a central needle element, and the other end of the connecting ring assembly is in threaded connection with an indicator arm assembly through fixing pins on an indicator plate assembly; a worm assembly is arranged between the connecting ring assembly and the dial, one end of the worm assembly is fixedly connected with the connecting ring assembly by the indicator plate assembly, and the other end of the worm assembly is connected with the dial through worm pillows; worms of the worm assembly perform a sliding movement along sliding grooves on the outer side of the dial. The three-arm protractor has the advantages of simple structure and reasonable design, can cooperate with a sextant to do further measurement and engrave a located position on a nautical chart through the central needle element, and is conducive to development of navigation careers.

Description

technical field [0001] The invention relates to a surveying and drawing tool used at sea, in particular to a three-bar indexing instrument. Background technique [0002] In the field of navigation, a sextant is an optical instrument commonly used to measure the angle between two distant targets. However, in practical applications, the sextant will produce deviations due to various reasons in measuring the latitude and longitude of the sea-going ship or aircraft, which will affect the accuracy of the measurement. Therefore, it is often necessary to use a three-bar indexer for further measurements to reduce errors. Contents of the invention [0003] The object of the present invention is to provide a three-bar indexing instrument which is simple in structure, reduces measurement errors, and is used in conjunction with a sextant. [0004] The purpose of the present invention is achieved in the following manner: a three-bar indexing instrument has a dial, the axis of the dia...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01C1/00
CPCG01C1/00
Inventor 狄丹岩朱亮
Owner CHANGZHOU HAOMAI MARINE EQUIP TECH