Abstract: A booster pump for a secondary fuel circulation system of a diesel engine adapted to be connected with the fuel pump of the primary circulation system by removing a screw plug associated with a piston chamber of the fuel pump in order to permit the booster pump to be threadedly engaged in place thereof by means of a threaded member formed on the housing of the booster pump. A spring actuated piston of the booster pump is thus brought into active connection with a piston of the fuel pump by way of a plunger protruding from the housing of the booster pump.

Abstract: A housing for an instrument, particularly of the type for indicating and recording speed. A front cover includes a window through which the indicator is visable.The cover is hinged to the housing on a horizontal axis spaced from the housing base so that the bottom of the cover swings inwardly of the housing while the top of the cover swings downwardly revealing a recording apparatus on its inner surface.

Abstract: In the disclosed display, the symbol segments of a passive cell, such as a liquid crystal cell, are each connected to one of two leads through an elastic connector layer having mutually insulated conductors running through the layer transverse thereto. According to an embodiment of the invention, the leads are on a printed circuit board and a control bus connects one of the leads to a control unit that operates the cell and a second bus connects the other of each of the leads to a monitor unit that compares the potential at each segment with the potential at the control unit. This checks the connections between the control unit and each segment.

Abstract: A cooling system for the fuel used in a diesel engine includes a closed fuel injection circuit and a fuel cooling circuit. The fuel injection circuit receives fuel through a suction pipe from a fuel tank and provides a continuously circulating flow of fuel. The fuel cooling circuit flows fuel from and back into the fuel tank. A heat exchanger is connected to both of the circuits and flows the fuel from the fuel injection circuit in indirect heat transfer relation with the fuel in the cooling circuit for removing heat from the fuel in the injection circuit.

Abstract: An arrangement for the self-wiping of contacts in multidigit interrogatory counters where the data are read through code wheels to contact wheels and to mechanical sliding contacts which sense the contact wheels. The improvement includes the arranging of the rotatably-mounted contact wheels to be mounted, independently from the frictional effect caused by the counting procedure during rotation on a movable shaft. Eccentrics control the movement of the movable shaft which make it possible to move the contact wheels in an oscillating manner against contact springs. This is accomplished in the overlap region for sensing the individual numbers.

Abstract: A printing unit is guided along a straight line in parallel relation with the printing plane of a printing support. A device is arranged to pivot the printing unit between at least two printing supports spaced angularly apart. The device includes a coupling assembly interconnecting the printing unit with a drive member. A part of the coupling assembly includes a slotted crosshead or plate in which rollers move through branch slots disposed angularly to one another. Due to the guidance afforded the printing unit as it is pivoted between different angularly spaced printing supports, it moves along a curve significantly flatter than the arc of a circle on which the printing planes of the printing supports are located.

Abstract: In the disclosed recording device, variable values are measured and recorded on a recorder carrier by moving the record carrier along a given direction. A number of recorders form a row and define separate tracks along the direction when the record carrier moves and trace lines along the tracks when actuated. The recorders are divided into a first group and a second group while suitable means measure the variable values. An energizing arrangement energizes a different recorder of the first group for each one of a number of ranges of measured values and energizes a different recorder of the second group for each one of a number of increments of measured values within each range. Each recorder of each second group is energized for the same corresponding increment regardless of the particular range.

Abstract: A printing mechanism, particularly for a counter device which records distances, is formed with a pair of sets of print wheels with a housing defining a slot through which a voucher may be passed to have imprinted thereon information contained on the print wheels. Platens are arranged to press the voucher against the print wheels and platen carriers which are rotatably mounted have the platens eccentrically mounted thereon. Overcenter springs engage the platen carriers, and after the carriers have been rotated through a predetermined angle, the overcenter springs drive the carriers through a further angle of rotation during which the platens are pressed against the print wheels during the printing process. The angle through which the platen carrier is initially rotated to load the overcenter spring is less than the angle through which the platen carrier is driven by the loaded overcenter spring.

Abstract: A preselection counter having a switch-off counter which is adapted to actuate a desired function when a quantity of this function determined by a preset value has been reached includes presettable indicating means having number rollers adapted to have the preset value set therein and to retain this setting through repeated cycles of operation of the switch-off counter. The presettable indicating means enable continuous display of the preset value during operation of the counter with the preset value being transferred from the number rollers of the switch-off counter by a sensing wheel mechanism which is operatively interposed therebetween and which may be repeatedly reset to the preset value on the preset counter after each cycle of operation of the switch-off counter without requiring changes in the preset value in the presettable indicating means.

Abstract: An arrangement which provides an indication of the economy of motor vehicle operation includes a number of sensors for detecting different vehicle operating factors including engine speed, distances travelled by the vehicle, and the position of the engine throttle. An acceleration measuring device is coupled to the distance sensor to determine the vehicle acceleration. Circuitry coupled to the sensors including the acceleration measuring device provides operating condition values in the form of code word elements. This circuitry includes a first comparator for setting a first set of threshold values so that the code word elements provided by the first comparator each correspond to a certain engine speed range. The circuitry also includes a second comparator operative to set a second set of threshold values so that the code word elements provided by the second comparator each correspond to a certain acceleration range.

Abstract: A keyboard which can be assembled from individual keys is disclosed. The individual keys include a key button, a key shaft for switching electric circuits, a stationary key body, and a spring for influencing the relative movement between the key shaft and key body. A base structure having cutouts is provided for receiving the keys. A circuit board carrying control elements cooperates with the key arrangement. The key buttons have several receiving openings for the key shafts. The cutouts in the base structure and the arrangement of the control elements on the circuit board are staggered relative to each other from row to row by a half spacing.

Abstract: A device for recording time markings on a speed graph in a tachograph includes a support mounting a pair of rods on which a slide is movably displaceable. The slide supports a recording member or stylus for marking the graph. An electromagnet is arranged to tilt the slide and laterally displace the stylus for a brief period of time in the direction of the time coordinate of the tachograph for effecting a marking on the speed graph.

Abstract: The record carrier allows visually readable recordings of measured values. A measuring device associated with said record carrier is driven by a drive device. The erasing device comprises at least one erasing magnet positioned directly on top of the record carrier and movable transverse to its transport direction so that the magnetic axis is parallel to the plane of the record carrier. The movement of the erasing magnet is effective essentially in the direction of the magnetic axis. A permanent magnet is used as the erasing magnet. A carrier for the magnet is in driving connection with the driving device of the measuring device.

Abstract: An electromechanically driven digital indicating device comprising an arrangement of seven flaps electromagnetically movable to one of two defined positions. The flaps are disposed in a housing at one plane thereof so as to form an "8"-shaped figure. The device includes a deep drawn parallelopiped housing having a front window opening in the form of a parallelogram and having a plate with an elevated, freely accessible "8"-shaped contour constructed integrally with the housing. The plate is supported only at connecting rods at the rear of the housing in internal sides walls of the housing. On the reverse side of the bar-shaped contour, there are provided grooves into which bearing bolts of the flap elements are pivotally inserted.

Abstract: In the disclosed apparatus, a slide is mounted on a guide bar for longitudinal as well as rotary motion. A recording instrument projects from the slide and a spring biases the slide about the guide bar so as to press the recording instrument against the record carrier. The speed measuring device moves the slide longitudinally on the basis of the measured speed.

Abstract: Apparatus for scanning the relative position of a preselector counter mechanism which includes a plurality of digital discs having radial cams rotated in accordance with the setting of a preselected numerical value on the counter, with each of the radial cams being provided with a scanning arm adapted to initiate a switching operation upon reaching a preselected stage of the counter mechanism, is provided with a plurality of counter wheels each adapted to be set to a pre-selected value with an analogue metering value cam in the shape of an Archimedean spiral being affixed to each of the counter wheels. Each of the counter wheels and the metering value cams is arranged to represent a decade of a decimal system numerical value. Indexing pinions gear each of the counter wheels and the metering value cams with those representing a next adjacent decade.

Abstract: Recording apparatus includes a planar support for supporting a flat recording medium such as one or more circular graph sheets. At least one recording instrument, e.g., a wire pen, is arranged to be movable relative to the support to provide a recording on the recording medium when the instrument is moved into contact with the medium and the medium is driven at a given rate. A lid is provided for covering the recording medium, the lid being arranged for pivotal movement about a hinge axis between open and closed positions relative to the support. The lid also serves to move the recording instrument into contact with the recording medium when it is in the closed position, and to lift the recording instrument out of contact from the recording medium when in the open position. A movable, guide part contacts the recording instrument to lift the instrument out of contact from the recording medium when the lid is moved to the open position.

Abstract: A perforated form band is introduced into a form printer through an input passage or shaft. The passage is formed by spaced walls and is pivotally mounted on the printer for movement between an input position and a working position. In the input position, a form band is introduced into and aligned within the input passage. In one embodiment, the leading end of the form band contacts transversely extending stop surfaces, while in another the leading end of the form band is aligned with an indicating mark and the perforations on the form band engage with projections in the input passage. With the form band aligned, the input passage is moved into the working position engaging the perforations in the form band on pins projecting outwardly from sprocket wheels which drive the form band through the printer. In the working position of the input passage, the form band no longer contacts the stop surfaces or engages the projections used in the aligning operation.

Abstract: A recording device featuring simplicity of design operative with a movable planar recording medium is formed as a unitary lever assembly having a first arm with a stylus mounted thereon and a second arm actuated to effect rotation of the lever assembly about a mounting axle to effect recording operation. The mounting of the lever assembly on the axle includes a rectangular slot which permits tilting movement of the lever assembly laterally of the mounting axle to permit the stylus to be lifted from the recording medium.

Abstract: A method for electronically monitoring parking lots and an electronic monitoring system for carrying out such method are disclosed. The method and system employs the use of a central control unit and a plurality of parking meters connected to the central control unit. The central control unit generates the time of day which is sent to and electronically stored in each parking meter. Depending on the number of coins inserted in a meter, an amount of time corresponding to the coins is calculated based on a given tariff. This time is added to the time of day to determine a time of departure. This time is indicated on indicating means provided at each meter. The actual time of day and the paid-for parking time are repeatedly compared until they are equal. At that time, the indicating means is cleared. A microprocessor, a variable storage element and a fixed storage element are provided at each meter to effect the necessary calculations and storage required. Additional features are also disclosed.