The first longcase clocks had hoods which were lifted vertically to gain access to the hands or movement. The slide-up hood moved in wooden grooves on the upper part of the backboard of the case and was locked in position by a spring catch known as a spoon, which had to be depressed to allow the hood to be raised. This was a satisfactory method of fitting the hood when longcase clocks were little more than 6 ft. In height, but as the design of clock cases developed their height increased, and towards the end of the 17th century slide-up hoods became inconvenient. The slide-up hood was glazed but had no door, and because the hood had to be slid upwards to wind the clock hinged doors came to be fitted in most instances.