(19)

(11)

EP 0 047 258 A1

(12)

(43) Date of publication: 17.03.1982 Bulletin 1982/11 (21) Application number: 81900517.0 (22) Date of filing: 27.02.1981

(51) International Patent Classification (IPC):  E05B 49/ 00( . ) E05B 47/ 00( . ) G07C 9/ 00( . ) (86) International application number: PCT/GB1981/000029 (87) International publication number: WO 1981/002603 (17.09.1981 Gazette 1981/22)

(84) Designated Contracting States: AT CH DE GB LI (30) Priority: 04.03.1980 GB 19800007325 10.04.1980 GB 19800011853 (71) Applicant: YALE SECURITY PRODUCTS LIMITED Willenhall West Midlands, WV13 1LA (GB)	(72) Inventors: CHEW, Ivan Wolverhampton West Midlands WV 3 8EP (GB) VERHAEG, John Kingswinford West Midlands (GB) (74) Representative: Prutton, Roger, et al  MARKS & CLERK, Alpha Tower, Suffolk Street Queensway Birmingham B1 1TT Birmingham B1 1TT (GB)