(19)

(11)

EP 0 137 781 A1

(12)

(43) Date of publication: 24.04.1985 Bulletin 1985/17 (21) Application number: 83902060.0 (22) Date of filing: 16.05.1983

(51) International Patent Classification (IPC):  F01M 1/ 18( . ) G08B 21/ 00( . ) G07C 5/ 00( . ) (86) International application number: PCT/US1983/000762 (87) International publication number: WO 1984/003261 (30.08.1984 Gazette 1984/21)

(84) Designated Contracting States: BE DE FR GB (30) Priority: 28.02.1983 US 19830470348 (71) Applicant: CATERPILLAR TRACTOR CO. Peoria, Illinois 61629 (US)	(72) Inventors: FUZZELL, Joseph, E. Peoria, IL 61604 (US) PFLEDERER, Mark, R. Morton, IL 61550 (US) ROBINSON, Tommy, E. Peoria, IL 61603 (US) (74) Representative: Brunner, Michael John, et al  GILL JENNINGS & EVERY Broadgate House 7 Eldon Street London EC2M 7LH London EC2M 7LH (GB)