Improvements in or relating to gas meters

(19)

(11)

EP 0 843 288 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	05.07.2000 Bulletin 2000/27

(43)	Date of publication A2:
	20.05.1998 Bulletin 1998/21

(21)	Application number: 97117727.4

(22)	Date of filing: 14.10.1997

(51)	International Patent Classification (IPC)⁷: G07F 15/00, G07F 7/08

(84)	Designated Contracting States:
	AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

(30)

Priority:

15.11.1996 GB 9623769

(71)	Applicant: SIEMENS MEASUREMENTS LIMITED
	Oldham, Lancashire OL9 7JS (GB)

(72)	Inventor:
	Beadsworth, Christopher Oldham, Lancashire OL4 7QE (GB)

(74)	Representative: Allen, Derek
	Siemens Group Services Limited, Intellectual Property Department, Siemens House, Oldbury Bracknell, Berkshire RG12 8FZ Bracknell, Berkshire RG12 8FZ (GB)

(54)	Improvements in or relating to gas meters

(57) An electronic gas meter is provided for delivering a quantity of gas to a consumer. The gas meter comprises a base meter unit 2 having a digital display 18 to visibly indicate the amount of gas a consumer has used, and an optical data port 20, via which access to electronic circuitry within the base meter unit 2 is provided for data communication purposes. A battery supply for powering the electronic circuitry within the base meter unit is secured behind a battery cover 14. The base meter unit is provided with latching means in the form of three recesses 22, 24, 26 whereby an add-on module 28 can be securely connected to the base meter unit 2 by way of the latching means.

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