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WPPressGaugeDetailHC.jpg (504 × 495 pixels, file size: 59 KB, MIME type: image/jpeg)

Summary

Description
English: Mechanics of a pressure gauge, annotated

Annotated internals of a pressure gauge, contrast enhanced.

Mechanical details

Stationary parts:

A: Receiver block. This joins the inlet pipe to the fixed end of the Bourdon tube (1) and secures the chassies plate (B). The two holes receive screws that secure the case.

B: Chassies Plate. The face card is attached to this on the opposite side. It contains bearing holes for the axles.

C: Secondary Chassis Plate. It supports the outer ends of the axles.

D: Posts to join and space the two chassis plates.

Moving Parts

1: Stationary end of Bourdon tube. This communicates with the inlet pipe through the receiver block.

2: Moving end of bourdon tube. This end is sealed.

3: Pivot and pivot pin.

4: Link joining pivot pin to lever (5) with pins to allow joint rotation.

5: Lever. This an extension of the sector gear (7).

6: Sector gear axle pin.

7: Sector gear.

8: Indicator needle axle. This has a spur gear that engages the sector gear (7) and extends through the face to drive the indicator needle. Due to the short distance between the lever arm link boss and the pivot pin and the difference between the effective radius of the sector gear and that of the spur gear, any motion of the bourden tube is greatly amplified. A small motion of the tube results in a large motion of the indicator needle.

9: Hair spring to preload the gear train to reduce gear lash and hysteresis.
Date

4 April 2004

(4 April 2004 (first version); 22 April 2004 (last version))
Source Transferred from en.wikipedia.
Author Leonard G. at en.wikipedia

Licensing

This work has been released into the public domain by its author, Leonard G., at the English Wikipedia project. This applies worldwide.

In case this is not legally possible:
Leonard G. grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.

Original upload log

The original description page was here. All following user names refer to en.wikipedia.
  • 2004-04-22 19:25 Leonard G. 504×495× (60279 bytes) Improved contrast annotated pressure gauge image
  • 2004-04-22 19:17 Leonard G. 506×495× (70754 bytes) improved contrast image of pressure gauge internals
  • 2004-04-04 16:53 Leonard G. 510×495× (53370 bytes) Mechanics of a pressure gauge, annotated

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4 April 2004

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File history

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Date/TimeThumbnailDimensionsUserComment
current21:52, 14 January 2012Thumbnail for version as of 21:52, 14 January 2012504 × 495 (59 KB)OgreBot(BOT): Reverting to most recent version before archival
21:52, 14 January 2012Thumbnail for version as of 21:52, 14 January 2012504 × 495 (59 KB)OgreBot(BOT): Uploading old version of file from en.wikipedia; originally uploaded on 2004-04-22 19:25:22 by Leonard G.
18:11, 3 September 2005Thumbnail for version as of 18:11, 3 September 2005504 × 495 (59 KB)Saperaud~commonswikiAnnotated internals of a pressure gauge, contrast enhanced. ==Mechanical details== ===Stationary parts:=== '''A:''' Receiver block. This joins the inlet pipe to the fixed end of the Bourdon tube (1) and secures the chassies plate (B). The two holes rec

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