Document b5z62NVG1V4y4rQJmDbYLevMo

PATENT SPECIFICATION DRAWINGS ATTACHED. Inventor:--DENNIS SIDNEY GILLIBRAND. 1,181,579 Date of Application (No. 31547/67) and filing Complete Specification: 8 July, 1967. 1,181,579 Complete Specification Published: 18 Feb., 1970. Index at acceptance:--F2 P(1A18A, 1A35,1B1, 1B5D, 1B8); FI B(2A9C, 2Y1, 2Y15). International Classification:--F1619/14. COMPLETE SPECIFICATION. Exhaust pipes. We, Ford Motor Company Limited, of The ceramic skin so formed is then cov 88 Regent Street, London, W.l, a British ered with aluminium paint. 45 Company, do hereby declare the inven The ceramic skin can withstand a tem tion, for which we pray that a patent may perature of up to 1,000C and the insula 5 be granted to us, and the method by which tion of asbestos tape, ceramic skin and it is to be performed, to be particularly aluminium paint serves to reduce the sound described in and by the following state emitted by the exhaust pipe. 50 ment:-- This invention relates to exhaust pipes WHAT WE CLAIM IS: -- 10 fitted to the internal combustion engines 1. An exhaust pipe which has asbestos of motor vehicles. tape wrapped around it and a ceramic skin The purpose of the present invention is covering die tape. to reduce the noise emitted by an exhaust 2. An exhaust pipe as claimed in claim 55 pipe. 1 in which the ceramic skin is covered with 15 According to the present invention an aluminium paint exhaust pipe has asbestos tape wrapped 3. An exhaust pipe as claimed in claim around it and ceramic skin covering the 1 or claim 2 in which the ceramic skin tape. comprises a ceramic cement 60 How the invention may be carried out 4. An exhaust pipe as claimed in any 20 will now be described with reference to the previous claim in which the asbestos tape accompanying drawing the single figure of is wrapped helically around the full length which shows a portion of an exhaust pipe of the exhaust pipe. incorporating the invention. 5. A method of sound insulating an ex- 65 An exhaust pipe 1 has asbestos tape 2 haust pipe comprising the steps of: 25 wrapped helically around it along its en (a) wrapping asbestos tape around the tire length. The pipe 1 is approximately exhause pipe; and 3 inches in outer diameter and the tape 2 (b) coating the asbestos tape with a is two inches wide and inch thick ceramic cement. 70 The asbestos tape 2 is covered by a cer- 6. A method as claimed in claim 5 in 30 amic skin 3 which in turn is covered by which more than one coat of ceramic ce aluminium paint 4. ment is applied and dried in turn. The method of sound insulating the ex 7. A method as claimed in claim 6 in haust pipe 1 will now be described. which each coat of ceramic cement is dried 75 The asbestos tape 2 is first helically by heating it 35 wound around the length of the pipe 1 and 8. A method as claimed in any of is held in place by wire at intervals along claims 5 to 7 in which the asbestos tape is the length of the pipe. helically wound around the full length of A coat of ceramic cement is then applied the tube. 80 to the asbestos tape 2 and either allowed 9. A method as claimed in any one 40 to dry over a period of twenty-four hours of claims 5 to 8 in which the ceramic ce or is oven dried. A second and a third ment is finally covered with aluminium coat of ceramic cement are then applied paint. and each dried or allowed to dry in turn. 10. An exhaust pipe sound insulated by 85 [Price 5s. 0c?.] SCF-ALLF-03230