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Manometer
| Catalogue Number | C1187 |
| Sub-categories | |
| Year of manufacture | 1952 |
| Location | Main Store |
| Object Type | Test Equipment |
| Division | Unknown |
| Platform | |
| Manufacturer | |
| Part No | 6C/865 |
| Serial No | 109/52 |
| Dimensions | Width (mm):310 Height (mm):1180 Depth (mm):270 Weight (g):11700 |
| Inscription(s) | Micro Manometer. Null Reading Mk.1. Ref. No. 6C/865 Serial No. 109/52 Main vernier & pressure scales graduated at 20° Centigrade. |
| Notes | The Manometer was made by Glass Developments of Brixton Hill. It was found in the Hangars some years ago and acquired by a man who used to make cableforms for Elliott Bros. It resided in his garage until the RAA acquired it. This is known as a null-reading cistern manometer, and was used for the calibration of pressure-reading instruments. Much of the existing calibrating gear at present available to Service operational units was insufficiently accurate for the precise calibration of modern aircraft instruments, such as Machmeters, airspeed indicators and altimeters. The null-reading cistern manometer was developed with the intention of providing a precise means of calibrating pressure measuring instruments over positive or negative pressure ranges up to one atmosphere, and robust enough for unit use, while having accuracy comparable with that of standard equipment hitherto only available at maintenance depots. Glass Developments last filed accounts in 1990 so have long since gone. Their other claim to fame was making glass buttons. |