Jemella Limited

Zellweger Analytics Limited

Tom Ford

Jamie McPherson

John Allan Sinclair

Michael Sussman

Charles Edward Downs

Richard Sims

David Smith

Jamie Mcpherson

The invention relates to a hair styling appliance () comprising at least one heater () having a plurality of heating zones (Z-Z). The heating zones are independently operable arranged along the length of the heater. The sequential arrangement of the independently operable heating zones helps to improve the thermal control of the hair styling appliance. The hair styling appliance may be a hair straightener, curling tong, curling wand or a crimping iron.

Hair styling appliance

The present invention provides a method of calibrating sensors within a gas detector () having a housing containing a gas inlet whereby gas can diffuse from the inlet to the sensors. The gas inlet in the housing is held against part () of the calibration apparatus to form a sealed gas interface between the apparatus and the detector; a source () of pressurized calibration gas is connected to the apparatus, and a predetermined dose of calibration gas is delivered to the interface between the detector () and the calibration apparatus () at a predetermined pressure. The source () of pressurized calibration gas may contain single or multiple calibration doses and, if the former, the calibration apparatus includes a dosing system such as cylinder () for metering individual doses of calibration gas.

Gas sensor calibration system

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Royston, United Kingdom

Tom Ford