Abstract: When coordinate data are entered from a tablet with a pen, the pen is operated on the tablet while depressing a predetermined key of a keyboard. A signal generated by the depression of the predetermined key is supplied to a keyboard controller. Upon reception of the signal, the keyboard controller stops sending key code data entered from the keyboard to an input/output controller. In this manner, undesirable data entry due to the improper operation of the keyboard is prevented when coordinate data are entered with the pen.

Abstract: A portable, hand held, electronic calculator assembly has a retractable cover slidably mounted to a calculator. The calculator has a front with a keypad and display, and a back. The cover has an inner surface and an exposed outer surface. The cover is movable relative to the calculator between a first position where the cover inner surface is juxtaposed to the calculator front, thereby protecting the keypad and display, and a second position where the cover inner surface is juxtaposed to the calculator back.

Abstract: A pocket-size electronic device adapted for use as an electronic organizer which includes a casing having a coordinate input section of a tablet type, a telescopic touch pen for writing in the coordinate input section, a cover hinged to the casing by means of an upper hinge and a lower hinge disposed at a distance from each other so as to cover the coordinate input section, a touch pen holder disposed between the upper hinge and the lower hinge, the touch pen holder having a first holder member and a second holder member, an end of the touch pen being retained by the first holder and the other end being retained by the second holder.

Abstract: An apparatus for selecting optimum lighting fixtures for a given application first determines a room cavity ratio from entered values of the dimensions of the room. The room cavity ratio is used to select from tabulated values a coefficient of utilization. The light output in lumens from a particular lamp, modified as necessary by depreciation factors, is applied to determine the number of fixtures and the spacing of those fixtures that are necessary to achieve a desired level of illumination. The design process then normally requires changing the number of fixtures to an integral number that lends itself to the space to be illuminated. Reentry of such values as well as different values of illumination levels that are associated with different fixtures allows repeated determinations to optimize the selection of a lighting fixture.

Abstract: A tidal time indicator for determining tide times at various locations on a specific stretch of coastline comprises a pair of complementary charts. One of the charts is in the form of a map having index marks representing the various locations and which marks are spaced apart at distances corresponding to the known tidal time differences between the particular locations. The other chart is in the form of a rule having a time scale and index marks representing different days, each of these index marks being positioned relative to the time scale at the high or low tide time on the particular day for a reference location on the map chart. Thus, by positioning the rule chart relative to the map chart so as to register a date mark with an index mark on the map chart representing the reference location, the tide times at the other map locations can be read directly off the time scale adjacent their respective index marks on the map. To prepare the charts, information is obtained from Tide Tables.

Abstract: A new and improved automatic fuel dispensing control system intended for use in serving a fleet of vehicles or equipment and requiring no operator action. A fueling receiver mounted in the fuel dispenser, a fueling transmitter mounted in each authorized vehicle, and a transmitter programmer comprise the system. Effective system security is afforded through the elimination of any requirement for keys, coded cards or the like.

Abstract: A number of values of a variable defining a program of operations are settable by means of three potentiometers, connected to a controlled apparatus, which control respectively the initial, final, and rate of change of the variable, each potentiometer having an associated plate one edge of which indicates the value set against a scale. The plate edges form a curve of a graph indicative of the program. In a modification a plurality of linear potentiometers are located at different positions along a scale showing stages in the program, the sliders of the potentiometers being used to set and also indicate the value of the variable at each stage.

Abstract: A mechanical apparatus for adding or subtracting binary numbers, in a visual manner, comprises a front plate with first and second rows of ball receiving apertures formed near the plate top. Balls are introduced into these apertures in a manner representing binary ones of the numbers to be added. Near the bottom of the front plate is formed a third row of apertures. A back plate having front plate guides is provided against which the front plate is held. Three rows of recesses formed in the front plate contacting face of the back plate and two additional rows of front plate apertures cooperate, when the plates are held nearly vertically and the front plate is slid upwardly along the back plate, to cause movement of balls from the first two rows of front plate apertures, through the recesses and other apertures and without other moving elements or switches and into the third row of front plate apertures in a manner to indicate in the third row the binary sum of the two binary numbers being added.

Abstract: This invention relates to a light shield/support device for reducing glare on the lighted display window of a portable electronic calculator. The device may also be interchangeably utilized to support the calculator in an inclined position which also tends to reduce the glare on the display window as well as making operation of the keyboard and positioning of the calculator on a disk top more convenient. The device includes a pair of spaced shank members having inclined upper ends having an inclined flange member carried therebetween. Attachment means are carried by a lower end of the shank members for engaging opposing side walls for securing the device to the calculator. The shank members are of sufficient length to support the flange member above and across the display window or below and across the bottom of the calculator for selectively utilizing the device as a light shield or as a support.