Abstract: A method of attaching an article to the inside surface of a pneumatic tire comprising coating an area of the inner surface of an uncured tire carcass with a first layer of adhesive, covering the first layer of adhesive with a removable masking layer comprising a flexible and heat resistant material, curing the tire carcass in a heated tire mold, removing the cured tire from the mold and removing the masking layer to expose the first layer of adhesive, coating a face of the article with a second layer of adhesive and attaching the article to the tire by bringing together the first and second layers of adhesive.

Abstract: A sensor is provided for detecting rotations of a pneumatic tire on a vehicle comprising two spaced apart mounting points for attachment to the radially inner surface of the tire tread region, a contact member between the mounting points for contacting the inner surface of the tread radius of the tire between the two mounting points and signal producing means comprising a piezo-electric device which is adapted to produce a signal when the contact member is moved radially of the tire relative to the two mounting points wherein damping means are provided so that a signal is generated when the movement occurs rapidly but slow movement generates no signal so that on rotation of the tire on a vehicle a signal is produced each time the tread region to which the sensor is attached becomes changed in radius at the contact patch of the tire but when the tread radius changes slowly when there is a pressure change in the tire and the movement is slow no signal is produced.

Abstract: A sensor for counting the rotations of a pneumatic tire on a vehicle comprising a rigid base member adapted for attachment to the radially inner surface of the tire tread region, at least two spaced-apart mounting links, a force sensing member disposed between said mounting links for producing a countable output signal and means for processing said output signal such that on rotation of the tire, a force variation is applied to the force sensing member due to the changes in circumferential radius of curvature of the tire tread in contact with the road.