A drive head assembly for a rotary scanner

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(11)

EP 0 429 170 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	24.07.1991 Bulletin 1991/30

(43)	Date of publication A2:
	29.05.1991 Bulletin 1991/22

(21)	Application number: 90310964.3

(22)	Date of filing: 05.10.1990

(51)	International Patent Classification (IPC)⁵: H01Q 3/04

(84)	Designated Contracting States:
	BE CH DE FR GB IT LI NL

(30)

Priority:

18.11.1989 GB 8926130

(71)	Applicant: Matra Marconi Space UK Limited
	Stanmore Middlesex HA7 4LY (GB)

(72)	Inventor:
	Humphries, Martin Edward Filton, Bristol BS12 7QW (GB)

(74)	Representative: Waters, Jeffrey et al
	The General Electric Company, p.l.c. GEC Patent Department Waterhouse Lane Chelmsford, Essex CM1 2QX Chelmsford, Essex CM1 2QX (GB)

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References cited: :

(54)	A drive head assembly for a rotary scanner

(57) A drive head assembly for a rotary scanner is provided including a first drive shaft (1) having one end (a) connectible to a rotary scanner platform for rotation thereof. First angular contact bearing means (2, 4) are provided for rotatably supporting the first drive shaft (1), first motor means (10) for supplying rotary drive to said first drive shaft (1), and a high resolution rotary position transducer operable to sense the angular position of the first drive shaft (1).

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