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Dial indicator system

A technology of indicating elements and indicating devices, applied in the field of local and long-distance indicating systems, can solve problems such as uncleanness and hindering accurate measurement

Inactive Publication Date: 2007-09-26
约瑟夫·威廉·默里
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While overcoming the factors of uncleanliness, electrical contact and friction, due to the inherent physical size of the switchgear, only a portion can be arranged on a small gauge, which will prevent accurate measurements
Also, for accurate measurements, multiple switches need to be given which will cause reliability issues

Method used

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  • Dial indicator system
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Examples

Experimental program
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Embodiment Construction

[0029] In describing the preferred embodiment, we first consider an existing, known pressure dial indicator, as shown in FIG. 1 . In this known dial indicator, the pointer (1) turns relative to the dial (2) according to the pressure of the liquid or gas in the tube. The pressure of the liquid or gas deflects the enclosed space (not shown in Figure 1 for clarity of illustration) contained within the dial indicator. This deflection is magnified and converted into a rotational displacement of the pointer (1) by means of a kinematic or mechanical gear train (not shown in Figure 1 for clarity of illustration) housed in the dial indicator housing.

[0030] For the sake of simplicity and clarity, it is to be noted that the use of the terms "pointer" and "indicating element" is meant to include amplification and switching mechanisms (eg, transmissions, pinions, shafts, etc.) housed within dial indicators . Furthermore, the use of the term "indicating element" is used to describe a s...

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PUM

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Abstract

A device for indicating the magnitude of a physical parameter, such as pressure, temperature or flow rate, has a movable pointer (1), a receiving antenna (4b, 4c) and a transmitting antenna (4a). The transmitting antenna (4a) generates an electromagnetic field in the vicinity of the pointer (1), so that an electrical signal is induced in the receiving antenna (4b, 4c). An inductive component (3) in the form of an electrically resonant circuit is connected to the pointer (1). Movement of the inductive component (3) in the electromagnetic field generated by the transmitting antenna 4a affects the electrical signal induced in the receiving antenna (4b, 4c) such that the signal induced in the receiving antenna (4b, 4c) is indicative of the displacement of the pointer. The device has the advantage that a simple mechanical indicator can be configured to produce an electrical reading by applying a simple passive inductive component to the pointer (3).

Description

technical field [0001] The present invention relates to a dial indicator, and in particular to a system for providing local and remote indications of measured physical parameters. Background technique [0002] Dial indicators are commonly used to indicate the magnitude of a physical parameter such as temperature, pressure or flow. Dial indicators also come in a variety and can be used as dial gauges, indicating gauges or similar. For example, in buildings, dial indicators are used in sprinkler systems to indicate water pressure as a way of checking operability in the event of a fire. The use of this mechanical indicator generally works well when providing a local visual indication. In some cases, remote indication is also required for reasons of validity, safety or regulation. For example, in petrochemical plants, remote electrical signals are required to manage control and data acquisition computer systems in order to record and control different process parameters, such...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D13/26G01D5/20
CPCG01D5/2073G01D13/26
Inventor 约瑟夫·威廉·默里
Owner 约瑟夫·威廉·默里