GB434387A - Improvements in and relating to pivots for instruments - Google Patents

Improvements in and relating to pivots for instruments

Info

Publication number
GB434387A
GB434387A GB27927/34A GB2792734A GB434387A GB 434387 A GB434387 A GB 434387A GB 27927/34 A GB27927/34 A GB 27927/34A GB 2792734 A GB2792734 A GB 2792734A GB 434387 A GB434387 A GB 434387A
Authority
GB
United Kingdom
Prior art keywords
tantalum
lengths
employed
pivots
nitrogen
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB27927/34A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB434387A publication Critical patent/GB434387A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C17/00—Compasses; Devices for ascertaining true or magnetic north for navigation or surveying purposes

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)

Abstract

An indicating device such as an aircraft compass indicator or other instrument, comprises a pivot consisting mainly of tantalum and having a nitrogenized surface. The tantalum may be alloyed with 7 1/2 per cent of tungsten. A process for the manufacture of pivots comprises drawing wire to the desired thickness, cutting it into lengths which are then shaped, and subjecting these lengths in an open nickel boat to an atmosphere of nitrogen while in a furnace heated to 500 DEG C. for 20 to 30 minutes. Different temperatures and times may be employed. Atomic nitrogen from the dissociation of ammonia gas may, alternatively, be employed in the nitrogenization process. Reference has been directed by the Comptroller to Specification 3691/05, [Class 12].
GB27927/34A 1933-09-30 1934-09-29 Improvements in and relating to pivots for instruments Expired GB434387A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US434387XA 1933-09-30 1933-09-30

Publications (1)

Publication Number Publication Date
GB434387A true GB434387A (en) 1935-08-30

Family

ID=21927173

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27927/34A Expired GB434387A (en) 1933-09-30 1934-09-29 Improvements in and relating to pivots for instruments

Country Status (1)

Country Link
GB (1) GB434387A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3726577A (en) * 1970-02-19 1973-04-10 Gelenkwellenbau Gmbh Roller bearing, especially for the bearing of the star pin of a universal joint

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3726577A (en) * 1970-02-19 1973-04-10 Gelenkwellenbau Gmbh Roller bearing, especially for the bearing of the star pin of a universal joint

Similar Documents

Publication Publication Date Title
Kumar et al. Grain boundary segregation and intergranular fracture in molybdenum
Kaminsky et al. Iron carbide inclusions in lower-mantle diamond from Juina, Brazil
GB434387A (en) Improvements in and relating to pivots for instruments
GB583855A (en) Improvements in point contact rectifiers
Rutter et al. The effect of cold working on the electrical resistivity of copper and aluminum
Bawn The kinetics of the decomposition of nickel carbonyl
Foroulis Kinetics and mechanism of the reaction of iron with sulfur vapor in the temperature range of 250 to 500 C
US2081820A (en) Pivot for indicating instruments
GB647748A (en) Improvements in and relating to the hardening of the surface of metals or metal alloys
Atkinson et al. Creep Characteristics of Some Platinum Metals at 1382° F
SU536251A1 (en) Composition for diffusion hardening tool
GB610440A (en) Improvements in and relating to the production of preferred crystal orientation in thin gauge silicon steel
GB421489A (en) Process for the production of electrical heating bodies
Kocks et al. Observations on the deformation of niobium
Andreev Exoelectron Emission During the Annealing of an Amorphous Co--Fe--Si--B Alloy in the Temperature Range 300-480 deg C
GB451601A (en) Improvements in and relating to the production of heat-resistant articles for use at high temperatures
GB205125A (en) Manufacture of weather-proof articles of ferrous alloys
US1502969A (en) Annealing and apparatus used therein
GB356026A (en) Improvement in gauge blocks and other precision measuring instruments
GB482480A (en) Improvements in or relating to temperature measuring plugs
GB810366A (en) Improvements relating to heat-resisting alloys
GB329732A (en) An improved instrument for determining the latitude of the place in which it is used
Carroll et al. Iffusion Measurements in Iron-Nickel with the Electron Probe Microanalyzer
GB371361A (en) Improvements in or relating to the manufacture of metal alloys
GB399967A (en) Improvements in or relating to the manufacture of high ohmic resistances