GB871147A - Improvements relating to apparatus for defining the vertical - Google Patents

Improvements relating to apparatus for defining the vertical

Info

Publication number
GB871147A
GB871147A GB6821/57A GB682157A GB871147A GB 871147 A GB871147 A GB 871147A GB 6821/57 A GB6821/57 A GB 6821/57A GB 682157 A GB682157 A GB 682157A GB 871147 A GB871147 A GB 871147A
Authority
GB
United Kingdom
Prior art keywords
sphere
spheres
jets
housing
magslip
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
GB6821/57A
Inventor
Humphrey Gordon Nelson
William Nicoll
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.)
Ferranti International PLC
Original Assignee
Ferranti PLC
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 Ferranti PLC filed Critical Ferranti PLC
Priority to GB6821/57A priority Critical patent/GB871147A/en
Priority to NL225273A priority patent/NL106240C/xx
Publication of GB871147A publication Critical patent/GB871147A/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
    • G01C9/00—Measuring inclination, e.g. by clinometers, by levels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41B—MACHINES OR ACCESSORIES FOR MAKING, SETTING, OR DISTRIBUTING TYPE; TYPE; PHOTOGRAPHIC OR PHOTOELECTRIC COMPOSING DEVICES
    • B41B21/00—Common details of photographic composing machines of the kinds covered in groups B41B17/00 and B41B19/00
    • B41B21/16—Optical systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/435—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material
    • B41J2/465—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using masks, e.g. light-switching masks
    • B41J2/4655—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using masks, e.g. light-switching masks using character templates
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C19/00—Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
    • G01C19/02—Rotary gyroscopes
    • G01C19/44—Rotary gyroscopes for indicating the vertical

Abstract

871,147. Gyroscopic apparatus. FERRANTI Ltd. May 23, 1958 [March 1, 1957], No. 6821/57. Class 97(3) [Also in Group XXXIV] Apparatus for defining the vertical comprises two spheres each having its centre of gravity displaced from its geometrical centre, such as by making one hemisphere 10 of aluminium and the other of brass 11, and each supported in a generally spherical housing 14, 15 by a gaseous medium under pressure. The air issuing from jets 18 supports the sphere and some passes through the vertical passage 12 and horizontal passages 22 to issue as somewhat tangential jets 13 which spin the sphere about the axis 12<SP>1</SP>, the jets 13 being so arranged that the two spheres rotate in opposite directions. A steel ring 19 co-operates with pickoff coils 20, 21 mounted upon the housing 15. Each sphere and housing is mounted in a gimbal system with servo-motors operating magslip transmitters and magslip followthrough transmitters so that the outgoing signals are dependent upon the attitude of the supporting craft whereas lateral accelerations precess the spheres in opposite directions and the resultant signal is zero. In a modification the ring 19 and coils 20, 21, are omitted and the sphere is painted half black and half white, photo-electric cells being used to indicate departure of the line of demarcation from the horizontal.
GB6821/57A 1957-03-01 1957-03-01 Improvements relating to apparatus for defining the vertical Expired GB871147A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB6821/57A GB871147A (en) 1957-03-01 1957-03-01 Improvements relating to apparatus for defining the vertical
NL225273A NL106240C (en) 1957-03-01 1958-02-25

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB6821/57A GB871147A (en) 1957-03-01 1957-03-01 Improvements relating to apparatus for defining the vertical

Publications (1)

Publication Number Publication Date
GB871147A true GB871147A (en) 1961-06-21

Family

ID=9821376

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6821/57A Expired GB871147A (en) 1957-03-01 1957-03-01 Improvements relating to apparatus for defining the vertical

Country Status (2)

Country Link
GB (1) GB871147A (en)
NL (1) NL106240C (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3207979A (en) * 1961-08-01 1965-09-21 Gen Motors Corp Measurement of inaccuracies in a surface of revolution
GB2136870A (en) * 1983-01-10 1984-09-26 Cannings John Arthur Pressurised spherical interfaces
CN103344229A (en) * 2013-07-05 2013-10-09 西北工业大学 Miniature hemispherical resonant gyroscope based on SOI (Silicon on Insulator) silicon slice and manufacturing method of miniature hemispherical resonant gyroscope

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3207979A (en) * 1961-08-01 1965-09-21 Gen Motors Corp Measurement of inaccuracies in a surface of revolution
GB2136870A (en) * 1983-01-10 1984-09-26 Cannings John Arthur Pressurised spherical interfaces
CN103344229A (en) * 2013-07-05 2013-10-09 西北工业大学 Miniature hemispherical resonant gyroscope based on SOI (Silicon on Insulator) silicon slice and manufacturing method of miniature hemispherical resonant gyroscope

Also Published As

Publication number Publication date
NL106240C (en) 1963-10-15

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