Abstract: A warning light system has one or more articulated arrays of light blocks. The arrays maybe packable and lockable for transporting. In a deployed state the arrays provide variable combinations of light signals that may alert and direct oncoming traffic. The arrays are mechanically and electrically connected to a control module which controls the light blocks to provide light signals. The arrays can be deployed in a hazardous or obstructed lane without entering an unobstructed traffic lane.

Abstract: An apparatus for measuring wind speed and direction includes: a wind vane having a permanent magnet, an anemometer having a permanent magnet and a ferromagnetic member, and a stationary housing having radially and axially mounted reed switches. As the anemometer spins, the anemometer magnet closes the radially mounted reed switch once per revolution. This produces a signal having a frequency proportional to wind speed. The wind vane magnet rotates around the housing to a point determined by the wind direction, producing enough flux to keep the axially mounted reed switch closed. The ferromagnetic member is interposed between the magnet in the wind vane and the axially mounted reed switch once per revolution. This draws flux away from the axially mounted reed switch, allowing it to open. The result is a second output signal having a phase difference, relative to the first output signal, that depends on the wind direction. The direction of the fluid flow is determined by computing the phase difference.

Abstract: An apparatus for measuring wind speed and direction includes: a wind vane which has a permanent magnet, an anemometer which has a permanent magnet and a ferromagnetic member, and a stationary housing which has a radially mounted reed switch and an axially mounted reed switch. As the anemometer spins in the wind, the magnet in the anemometer closes the radially mounted reed switch, once per revolution. This produces a signal having a frequency proportional to wind speed. The magnet in the wind vane rotates around the stationary housing to a point determined by the direction of the wind. This magnet produces enough flux to keep the axially mounted reed switch closed. The ferromagnetic member is mounted in the anemometer so that it is interposed between the magnet in the wind vane and the axially mounted reed switch once per revolution. This draws flux away from the axially mounted reed switch, allowing it to open.

Abstract: Instruments are readable in either feet or meters by printing a metric altitude scale on the inner surface of a rotating protective crystal that shields the English altitude scale and the indicating needle. The metric altitude scale covers 1,000 meters and extends 33.7.degree. beyond a full circle. A series of kilometer index marks is formed at intervals of 33.7.degree. on the face of a bezel which surrounds the English scale. To use the metric scale, the user holds the bezel to align the index arrow line with the appropriate kilometer index mark, according to the user's elevation. Subsequently, if the needle moves beyond either limit of the metric scale, it is only necessary to rotate the crystal 33.7.degree. in the appropriate direction, thereby aligning the "0" meter line with the adjacent index mark.

Abstract: An altimeter instrument is provided with display means which is locked or unlocked as a function of the output of a sensor which indicates whether the instrument or the apparatus whose altitude the instrument is sensing is in motion or about to be placed in motion or is stationary for a more than a predetermined period of time.

Abstract: A combined altimeter/barometer instrument is provided with setting means which can be actuated in two different modes, i.e., in a pressure level setting mode so as to set the instrument to a known sea-level pressure, or in an altitude setting mode to a known altitude. Either setting mode will bring both displays to the correct value. However, one or another of the displays is "locked" at the set value depending upon the setting mode used. Preferably, where the pressure setting mode is employed, the altitude display is locked after setting, so that the instrument acts solely as a barometer to display changes in sea-level pressure, while continuing to display the altitude prevailing at the time of setting. Where the altitude setting mode is used, the sea-level pressure display is locked. The instrument acts as an altimeter and assumes that the sea-level pressure remains constant at the value prevailing during setting.