Abstract: A bicycle handlebar holder for a wrist instrument with pushbuttons and electrical contact means, said holder having a holder body, a cover which is pivotable with respect to the body and defining therewith a receptacle for holding the case of said wrist instrument when the cover is closed, a clamp for attaching the body to a bicycle handlebar, a plurality of electrical contacts disposed in the body and opening into the receptacle, and at least one manual actuator disposed in the cover and adapted to be operated from outside of the cover and having a portion movable inside said receptacle which is disposed to depress a pushbutton when the actuator is operated.

Abstract: Briefly stated, the invention is practiced by providing a wristwatch with a case having manually actuated switches, a microcomputer in the case responsive to the switches, an annunciator responsive to the microcomputer, and an electrooptic display having a set of first segments arranged to provide digits and a set of second circumferentially spaced radial segments surrounding the first segments. The microcomputer is programmed to provide several modes of operation, such as a time of day mode, a timer mode, a chronograph mode, and a ratio calculation mode. The time of day mode is arranged to display local time of day on the first segments and time in another time zone on the second segments. The timer mode is arranged to display the time remaining in a countdown time period selected by manually actuating one of the switches. The time remaining is displayed on the first segments while local time of day is displayed on the second segments.

Abstract: A digital wristwatch having a case and strap also serves as a computer to display speed, distance, and pedaling cadence when temporarily attached to a holder on the bicycle handlebar. Wheel and sprocket sensors are connected to electrical terminals in the holder. The wristwatch is provided with external electrical terminals connected to a microcomputer in the watchcase which uses signals from the sensors when the watchcase is termporarily retained in the holder. The watch mode is converted to bicycle mode by actuating push buttons on the watchcase, which are accessible through windows on the holder.