A solar chronometer in which a style is aligned with the celestial pole and an equatorial member, preferably in the shape of a ring, is aligned with the equator. The style and equatorial member cast shadows upon a chart and the point where the shadows intersect indicates the hour and the date.

A digital timing system for sports competitions in which a large number of participants progress independently and simultaneously on the same track between a starting line and a finish line. This system comprises a starting time memory, a finish time memory, and a register which permits the temporary storing of the times of a predetermined number of events happening nearly simultaneously. The time is furnished by means of an oscillator and decade counters of which the multiplexed output is appli...

An hour and minute display for an electronic chronometer includes a plurality of first indicators positioned in spaced relation about the perimeter of a closed geometric figure. The first indicators are actuatable to indicate the hour. A plurality of second indicators are positioned about a closed geometric figure adjacent the first indicator. The second indicators are selectively actuatable to indicate minutes past the hour in 5-minute increments. Also positioned adjacent the first indicators i...

A fully electronic chronometer using a quartz crystal as a frequency standard and displaying mean time by the use of electronically operated digital read-outs. The circuit permits the display of the instant of time at which a switch is operated, while mean time continues to be counted by the circuitry. Other features include conservation of power by display of mean time only upon demand and the provision for control and display remote from the timing circuitry.

A chronometer having a tide grid comprising a contour line indicating at least one complete tide cycle and a superposed reading grid comprising at least one read-off reference mark. One of the grids is driven in rotation at a constant angular speed about an axis. The grids are concentric about that axis and the read-off reference mark is radially disposed relative to that axis The contour line indicates tides on polar coordinates such that the distance of a point on the contour line from that ax...

A solid-state electronic wristwatch with a digital display includes additional circuitry to permit utilization of the display and the source of constant frequency signals of the watch to expand its operation to a calorie calculator. The calorie calculator components include a counter circuit for entering a count indicative of caloric intake, circuitry for entering calorie expenditure rate in terms of calories expended per hour, and a main calorie counter into which the calorie input information ...

In a programmable control means for switching timers or chronometers, a magnetic field sensor having a ferromagnetically alloyed wire is disposed on a program carrier. A coil is brought into the proximity of the wire. A permanent magnet adjacent thereto has a magnetic field which influences the core polarity of the wire such that the coil emits voltage pulses given polarity changes therein for the control of an electric or of an electronic switch. According to the invention the sensor wire is re...

A clock for the attachment of a dog's collar or the like that indicates the passage of time according to the dog's or pet's frame of reference. For example, the rate of passage of time may be such that for each human day of time passage, seven dog or pet days are reflected by the clock's display. Additional data, displays, and information may be carried, manipulated, entered and chosen by the use of user control buttons or the like. A battery may supply power to internal circuitry that drives a ...

An indexing unit in the form of a disc or an endless tape for switching chronometers has a number of programmable switch tabs disposed at an edge of the element forming a unitary structure, the switch tabs being depressable against the influence of a restoring force for positioning selected tabs in at least one programming position for actuating a separate switch device for switching a chronometer. The indexing element is comprised of flexible foil having a number of uniformly spaced incisions a...

A chronometer provided with three rows of readout lights which indicate seconds, minutes and hours through binary counting of control pulses from an electronic pulse generating system. For setting the readout for correct time, a series of manual overcontrols are operable in conjunction with a start-stop control for rapid advance of minutes and hours counting. Provided, is a control for "dark" operation in which the counting mechanism continues to operate without energizing the readout lights.