Abstract: An apparatus for encoding data representative of keyboard music is disclosed. In the preferred embodiment, the data source is a keyboard which is played by a musician which incorporates a set of switches forming key closures. The closures themselves represent the music. The music is encoded by grouping the keyboard in convenient sized groups, typically octaves, and all of these groups are input to a buffer. A multiplexer scans the buffer. Timed generators form the synchronization wave-forms, space wave-forms and mark wave-forms. All of these wave-forms are generated in timed sequence. They are input to a flip flop which forms an output word on a two wire carrier system. The two wire output encodes all data required for word decode; namely, clock, sync, mark, and space data.

Abstract: Adjacent primary digitals of a musical keyboard are actuated in the same fingering sequence for all key signatures. Each primary digital forms part of a three section group having two secondary digitals for producing the sharps and flats. Through a separate selector keyboard, the tones produced by selected digitals are shifted by a half-tone in accordance with a logic applied program to transpose operation of the keyboard to the selected key signature.

Abstract: An electronic circuit for simulating the sound of a skin head percussive instrument struck with a stick includes a pair of ringing oscillators of different frequencies both triggered by pulses from the rhythm pattern generator of an electronic organ, a circuit for combining the output signals from the two ringing oscillators in preselected amplitude proportions, and a circuit for distorting the combined signal in such a way as to non-linearly amplify the combined signal so as to produce an electrical signal having characteristics such that when acoustically reproduced produces a sound highly simulative of that produced when the membrane of a skin head instrument is struck with a stick.

Abstract: A tone generator for use with an electronic musical instrument includes a binary counter operated by a binary comparator and a source of clock signals for incrementally advancing or decreasing the state of the counter from a first selected state to a second selected state. The states of the counter control a programmable divider which develops corresponding output tone signals. The counter produces multiple state changes between the selected states so that each individual state change results in a frequency change which is inaudible. The overall effect is to thereby synthesize a tone signal creating the illusion of a continuous pitch change between the pitches corresponding to the selected counter states. The source of clock signals includes a rate multiplier programmed according to the states of the counter to compensate system operation for insuring that similar musical effects defined by corresponding musical intervals are produced in equal time intervals.

Abstract: A damper for pianos comprises a damper block arranged on a pivotable lever or rod and is limited substantially on all sides by convex outer surfaces, and a damper head cooperating with the piano wire and engageable with the damper block through complementary curved surfaces.

Abstract: The invention provides in a pedal for a bass drum having a foot plate which is returned to its rest position by a compression spring, the improvement whereby guide means are provided to constrain the said spring from buckling during its compression and relaxation.

Abstract: An aircraft fastener element, as a collar or nut, designed and constructed to produce improved fatigue performance in low shear transfer joints. The improved collar or nut has a bearing surface which abuts against the adjacent surface of the workpiece aperture in an initial predetermined area so that when the collar is swaged or the nut tightened and compressed the initial annular base is flattened to no more than approximately 1.25 D (D being the internal diameter of the nut or collar).

Abstract: A self-propelled engine, such as a rocket, is described which is intended to be launched from a tube, comprising a front stage and a rear accelerating stage, means for achieving the separation of the two stages at the end of the combustion of the propellant charge contained in the acceleration stage, said propellant charge being integral with the front wall of the rear acceleration stage, wherein the front wall includes a first fixed part and a second part capable of sliding along the axis of the engine, said front wall parts each carrying respective propellant charges separated by a partition fixed in leakproof manner to one of said parts of the front wall. The second part which slides rests against the front stage, and the charge carried by the second part has a slightly longer combustion time than that carried by the first part which is fixed.

Abstract: A tank mortar having a magazine receiving a plurality of fin-stabilized projectiles which can be selectively aligned with the barrel. The barrel is movable relative to the magazine to enable sealing engagement of the barrel with the selected magazine chamber. The weapon frame which rotatably receives the magazine has an upper portion in which the bottom of the barrel is axially shiftable, e.g. by a bayonet arrangement, and a lower portion which sealingly engages the bottom of the munition chamber which is aligned with the barrel includes the firing element which triggers the displacement of the projective from the round chamber through the barrel. The base of the weapon frame is also provided with a ball received in a socket which is shiftable to traverse the weapon.

Abstract: A compact construction for a vehicle steering gear is provided of the rotary valve type which utilizes a torque rod having an end connected to a worm shaft and the opposite end connected to a steering spindle wherein axial load oil pressure on the torque rod is minimized to avoid breakage. This is accomplished by hydraulic circuitry which routes high inlet pressure to the valve housing directly to the valve grooving instead of to an end of the valve body where it would exert an axial force on the torque rod.

Abstract: An axial-piston machine such as an axial-piston motor or, preferably, an axial-piston pump, has a cylinder drum rotatable in a chamber defined by the machine housing, the cylinder bores at low pressure communicating with the interior of the housing. Only part of the end of the cylinder drum turned toward a displacing slide covers the surface of this slide which is provided with an arcuate groove for communication with the cylinder bores under elevated pressure while the control surface of this slide only covers the high-pressure portion of the surface of the cylinder drum so that the latter overhangs the slide.

Abstract: A recloseable, pilfer-proof container is disclosed which is formed from a single blank of fiberboard according to a method of the present invention. The container includes a six-sided, closed container base portion having a hinged, pilferproof access flap. A tear-open, hinged access flap is defined in the top and front sides of the container base by a broken cut line. A pair of locking tabs are defined by the cut line in the front side of the container base adjacent the access flap. A hinged lid portion overlies the access flap and is glued to the access flap so that it is constrained to pivot with the flap. When the lid portion is grasped and pivoted to open the container for the first time, the hinged access flap is torn away from the top and front sides of the container base along the cut line and is pivoted on its hinge. When the lid portion and flap are reclosed, the locking tabs engage corresponding edges of the flap to lock the lid portion and flap in the closed position.

Abstract: A machine for bringing the flexible upright walls of paperboard containers into a predetermined configuration, so that fitment rings may be applied to the upper ends of those containers, includes a pair of captivator chains having parallel inner passes and a main conveyor located generally between the two inner passes. The containers are released onto the main conveyor at equal intervals, whereupon opposed captivator blocks on the two chains fit snugly around the containers and cause them to assume the desired configuration. This enables fitment rings to be installed over the upper margins of the sidewalls or some other operation to be performed on the containers.

Abstract: A conveyor mechanism for automatically removing articles, such as cheeses, floating in a liquid includes a horizontal section adapted to be positioned below the surface of the liquid and an integral upwardly inclined section. Articles that float upon the horizontal section are moved to the inclined section which lifts them out of the liquid and delivers them to an elevated point. The articles are prevented from jamming the conveyor by moving stepped walls located on either side of the horizontal section at the location where jamming is likely to occur. The stepped walls move longitudinally back and forth 180.degree. out of phase with one another to gently bump and align the articles. In the preferred embodiment, a single motor drives the conveyor and rotates cam wheels which move the stepped walls.

Abstract: The machine consists of more operative equal and independent units located side-by-side, but operated by a single motor, and each predisposed according to the screening of the mushrooms to be carried out. In each unit, the mushrooms, approximately pre-selected in the wanted size by a screening machine are discharged into a loading basin. From said basin, sequentially, the mushrooms are taken by a conveyor means and thereby conveyed up to the outcome point from the machine. During this path, the mushrooms first are self-selected at the predisposed size, and simultaneously they self-orient, or are compelled to turn to their correct positions, and then they undergo the cutting off of the terminal part of their stems.

Abstract: A baling machine for making large rectangular bales of straw or hay has a bale chamber with an entry opening at one end. Material is fed under compression to the entry opening to fill the chamber. So that the bale is formed of consolidated columns of material a guide is located adjacent the entry opening and can be moved in and out of the chamber after each column is formed.Pivoting of the guide pushes completed columns along the chamber to make way for incoming material.

Abstract: A calender for processing pulverulent and doughy materials, composed of hydrostatic controlled deflection rolls. Each of the controlled deflection rolls comprises a roll shell rotatable about a stationary support member and hydrostatic support elements which can be activated by a pressurized fluid medium. The hydrostatic support elements of the rolls which coact at a pressure gap or nip, with the same elevational arrangement of such rolls, receive pressurized medium at the same pressure. If the rolls are located at an elevational difference then there is provided a differential pressure regulator for taking into account the effect of the inherent weight of the roll shells. The width over which the rolls can be impinged with the pressurized fluid medium can be adjusted, and equally the temperature of the pressurized fluid medium. The calender can be equipped with four rolls arranged in a substantially Z-shaped configuration.

Abstract: The system is used for imprinting indentification code on individuals of articles such as automobiles produced in quantity, particularly on an assembly line, and comprises an instruction unit to provide a data signal representing an identification code to be imprinted, a stamping machine in which setting of imprinting types is performed automatically according to the data signal, a sensor which provides a signal representing an actual state of the type setting, and a comparator which provides an operation signal to the stamping machine only when the signal from the sensor agrees with the data signal and otherwise provides an alarm signal. For further accuracy of imprinting operation, the system may include a sensor to detect the type of the individual article to be imprinted and another comprator to prevent the action of the stamping machine also when the type of the article differs from one implied by the data signal.

Abstract: The disclosed system controls, through novel pressure and valving adjustment mechanisms, the application of dampening fluid to the ink roll or offset plate on the plate cylinder of an offset printing press. The dampening fluid passes through a pressure compensator which adjusts the fluid pressure in response to changes in the speed of the press. The fluid at the adjusted pressure is then directed to a spray bar, where it is discharged through a plurality of nozzles. The fluid is directed to the spray bar by a multiple valve, page control assembly. In the page control assembly fluid from a common manifold is discharged through a plurality of dual control valves to respective nozzles. Closure elements for the respective valves are operated by air pistons. A plurality of needle elements for the respective valves are axially adjusted by a common manual control so that adjusting the manual control adjusts the amount of fluid from one segment of the spray bar, preferably corresponding to a full page.

Abstract: An ink supplying device which supplies ink to a plate cylinder and thus to a blanket cylinder of a rotary printing press includes a plurality of rollers which are in contact with one another and with the plate cylinder, respectively. The device further includes an ink supply fountain, an ink supply roll and a ductor roll which is displaceable between two positions in one of which it contacts the ink supply roll and is replenished with ink and in the other of which it contacts one of the rollers and delivers the ink thereto. A drive for the ink supply device includes a main drive shaft and a transmission which directly drives the above-mentioned one roller while circumventing the other rollers so that a jolt which occurs upon the contact of the ductor roll with the one roller is not transmitted to the other rollers.

Abstract: The track brake is intended to limit the speed of rolling motion of a freight car according to the track gradient in a marshalling yard. A retarder installed along a braking rail comprises a number of braking tappets each having a portion which projects above the braking rail in the rest position and each being applied in turn beneath each wheel of the car to be braked. The track brake comprises a motion converter constituted by a series of rockers each pivotally mounted on a pin connected to the braking rail. One portion of each rocker cooperates with a braking tappet and another portion of the rocker cooperates with a piston-rod of a substantially horizontal hydraulic brake cylinder.

Abstract: A magnetic suspension vehicle carries serially arranged magnet structures which are serially coupled to each other and resiliently mounted for adaptation to an associated rail arrangement.

Abstract: A hydraulic snubber device and more particularly, a snubber adapted to be interposed between a bolster and a side frame member and being operative to provide a first damping rate when the railway car is operating on tangent track and at equilibrium speed on super elevated track and to provide a second relatively higher damping rate when the railway car is operating on super elevated track at low speed and in all instances of severe rocking.

Abstract: The pallet comprises a reusable portion and an adjacent expendable portion. A slip sheet overlies the top surfaces of both the reusable and expendable portions but is only attached to the expendable portion. With this arrangement, a fork lift can be received under both the reusable and expendable portions and lift a stack of items on the slip sheet to a desired location. The fork lift can then be lowered until both the reusable portion and expendable portion engage the floor. The fork lift is partially withdrawn to be free of the expendable portion but still positioned beneath the reusable portion. By then lifting slightly only the reusable portion, it may be withdrawn from under the slip sheet so that the stacked items will rest on the expendable portion and slip sheet and the reusable portion of the pallet is then available for use with other expendable portions and slip sheets.

Abstract: An attachment structure for mounting a furniture component, such as a work surface member, on the slotted uprights of a wall panel. The attachment structure is releasably engageable with both the slotted upright and the work surface member, such as a desk top. A hook-carrying support is releasably attached to the upright, and the support in turn has the work surface member releasably attached thereto. A latching device, as mounted on the support, automatically engages the slotted upright to fixedly lock the support thereto only when the work surface member is mounted on and properly engaged with the support. The latching device also causes the front edge of the work surface member to be locked down against the support.

Abstract: An installation for the treatment of sediment coming a purification station for industrial waste water. The installation consists of a static furnace incinerator into which sediment is transferred by means of an injector. The injector is made up of an elbow tube connected between the furnace and the sediment, a blast pipe injecting air into the furnace and drawing sediment with it due to the vacuum created by the blasted air flow, and an additional air inlet in the furnace wall, the additional air inlet surrounding the elbow.

Abstract: A pneumatic needle threading assist is disclosed which has a thread collecting chamber in which, due to the air flow therethrough, thread having passed through the eye of a sewing needle, is therein deposited in a series of spiral loops limiting the amount of thread in the vacuum line and preventing the vacuum source from being contaminated with the thread.

Abstract: Strips of material fed from a supply roll are propelled helically around a cylindrical form with edges of adjacent convolutions of the material contiguous with one another and the contiguous edges of the material are joined together to form a tubular structure. Either before or after formation into a tubular structure the material is cut in predetermined manner into garment lengths and to provide armholes or other openings as desired. In one embodiment means is provided for joining adjacent edges of two or more narrower strips to form a wider composite strip which is then wound helically and edges of adjacent convolutions are joined to form a tubular structure. The narrower strips may be formed from wider material by continuous splitting means which is adjustable to provide different widths. An attachment for a sewing machine has inclined rollers engageable with strips of material being stitched to guide them so that their edges are contiguous as they are being stitched to an underlying tape.

Abstract: Disclosed are ice-breaking units for ships adapted to be installed at the bow and/or bottom portion of the ship's hull, consisting of two ice-breaking units each of which can be reversibly driven independently of each other, for performing ice-breaking and/or propulsion of the ship. The ice-breaking unit has a screw-like body having a spiral blade wound thereabout. The ice-breaking units may be disposed at the bow portion, at both sides of the longitudinal center line of the ship, in parallel with or normal to the latter, or may be arranged to have a propulsion portion and an ice-breaking portion, respectively. The two screw-like bodies may be driven simultaneously in the same direction or reversed, or may be rotated in the opposite directions, to provide thrusts to move the ship in any direction of ahead/astern and port/starboard.

Abstract: A semi-automatic bailer plug assembly for attachment to the transom of a boat having a bail hole therein for receiving the bailer plug assembly is described. The bailer plug is normally spring biased into a closed position to plug the bail hole until it is manually retracted by a plunger disposed in opposition to the spring. When the plunger is pulled back and the boat transom is out of the water, a pair of stop members engage the plug and hold the plug in an open position permitting the boat to be drained of water. The stop members are coupled to a pair of float members. When the transom of the boat is placed in the water a buoyant force acting against the floats releases the spring biased plunger from engagement with the stop members and permits the bailer plug to automatically close the bail hole in the boat transom.

Abstract: A device for and a method of inhibiting damage to a vessel and structure include a bumper mounted on a frame for absorbing the force or shock caused as the vessel moves or rams against the structure which receives the frame and bumper.

Abstract: An energy conservation indicator for use in an enclosed locality adapted to be heated and/or cooled to temperatures maintained within limits recommended for energy conservation purposes comprises a thin disc of transparent material, having a backing provided with contrastingly colored printed matter and images of parts of a human face, such as eyes and eyebrows. A first configuration of encapsulated liquid temperature-sensitive crystals is arranged between the disc and the backing below the eyes to represent the image of a mouth on the face. The liquid crystals are of such a nature as to reflect incident white light through the disc at temperatures between a recommended upper temperature for heating and a recommended lower temperature for cooling, and said first configuration of the crystals constitutes an upwardly arced curve which, when activated, imparts to the face a frowning countenance to thereby indicate to an observer that the temperature in the locality is not within the recommended limits.

Abstract: A fluid pressure actuator such as an hydraulic top link has an external indicator device for marking the position of the piston within the actuator cylinder. The indicator has a collar which clamps on to the piston rod and a finger which extends longitudinally along the outside of the actuator cylinder to provide a direct reading of the piston position. An indirect indication may be provided by linking the longitudinally extending finger to a spring loaded tape indicator, or to an indicator arm which moves angularly across a scale.

Abstract: An improved gas barrier assembly for controlling coating thickness on a strip, has a header which comprises abutting length segments including a pair of conduit segments fixed to a frame in spaced apart position and an intermediate gas orifice segment located therebetween mating in end-to-end relationship with said conduit segments and a readily releasable connecting means for fastening the intermediate gas orifice segment to each of the conduits in gas tight relationship, said connecting means including means for supporting the intermediate gas orifice segment when the connecting means are unfastened so that it may be removed and replaced easily without removing the frame from the coating line.

Abstract: A toner head is disclosed for applying liquid toner to a moving record medium having a latent electrostatic image thereon, in which the contact surface of the head is curved in a cylindrical form to ensure proper engagement of the record medium during toning. Since the toner is circulated through the system by a vacuum pump arrangement, pressure relief means are provided to prevent an inward deflection of the record medium that could choke off toner flow during periods when the record medium is not moving over the toner head. In one embodiment, the toner head comprises a plurality of identical modules which are oriented alternately in opposite directions, so that some serve as toner inlet stations and some as exhaust stations. A toner clean-off head having a cylindrically curved contact surface is also disclosed.

Abstract: An aquaculture rearing system for improving space utilization and yield is disclosed in which clustered, vertical rearing tanks are provided with individual stacked habitats in the form of baskets attached to a strongback member which houses a removable feeding rod, in which the baskets are quickly detachable through the use of interlocking detents and in which nestable baskets are utilized for different sized animals. Progressive space increments to match growth are provided by two different size baskets and removable dividers. Overflow water is skimmed by a skimmer which surrounds the entire top of each tank to prevent bacteriologic contamination of the water within the tank. The staggered modular mounting produces a tripod-like stability even though each tank has a single leg, and provides visibility and density. An overhead materials handling system is used in which the animals are protected by a fog to prevent gill malfunction.

Abstract: A fish grader having a boxlike frame with at least one barred side with a net attached outside the frame. The grader is placed in water and fish to be sorted are put in it. The smaller fish swim through the bars into the net, leaving the larger fish in the grader box, from which they can be released into a rearing enclosure.

Abstract: Addition of an oxidizing agent which yields electronically activated oxygen, such as hydrogen peroxide, to seawater induces spawning and reproduction in shellfish, such as abalones, mussels, scallops and oysters. Such oxidizing agent, e.g. hydrogen peroxide, activates the enzymatic synthesis of prostaglandin-endoperoxide in reproductive tissues of shellfish, such as abalone.

Abstract: In individual animal-raising cages, which serve as refectory and as dormitory, a door system is individually provided, which allows the entry of an animal into the cage, but which must forbid the entry of a second animal. The lock or bolt takes its locking position as soon as the door is lowered behind the first animal which has entered, and it prevents another animal from raising the door from the outside. On the contrary, when the first animal wishes to get out, it automatically unlocks the bolt or lock before lifting the door. Several embodiments are described.

Abstract: A comb for use in removing bot eggs from the coats of horses is a thin, reinforced blade with the teeth formed by photo-etching. The spaces between the teeth have a minimum width in the neighborhood of 0.006 to 0.008 inches and a maximum width at their outer ends in the approximate range of from 0.015 to 0.020 inches with the thinness of the steel providing the teeth with effective egg-scraping margins.

Abstract: A generator for the production of both superheated steam and saturated steam has an outer casing formed by an inner cylindrical shell engaged within an outer cylindrical shell, the shells being closed by dished ends. An annular header for the admission of pressurized primary water is formed between an upper annular tube plate and a partition-wall while an outlet header for the discharge of primary water is formed by a central tube plate mounted within the inner shell. A bundle of parallel tubes for the circulation of primary water extends vertically upward from the central tube plate. The end portion of each tube has the shape of a crook in order to join the tubes to the annular tube plate in uniformly spaced relation. The secondary water is admitted into the casing by means of ducts formed in the inner shell near the central tube plate. The steam generated is discharged through ducts formed in the outer shell.

Abstract: A vapor generator which includes an upright furnace section the boundary walls of which are formed by a plurality of tubes for passing fluid through the length of the furnace section to convert a portion of the fluid to vapor or to heat the fluid. One portion of the tubes forming one of the boundary walls are bent out of the plane of the latter wall for connection to a plurality of headers. A single tube extends upwardly from each of the headers in fluid communication with the other tubes connected to said header, with the single tubes being disposed in a spaced relationship to form a screen for the passage of combustion gases from the furnace section to a heat recovery section disposed adjacent the furnace section.

Abstract: An anti-wear compression ignition fuel for use in diesel engines comprising (1) a monohydroxy alkanol having from 1 to 5 carbon atoms, and (2) a wear inhibiting amount of an N-hydroxy hydrocarbonamide, e.g. N-hydroxy oleamide. Optionally, said fuel composition may also contain an ignition accelerator such as an organic nitrate.

Abstract: A pulse width computer for a fuel-injected internal combustion engine generates injector actuation control pulses, the widths of which increase with decreasing engine temperature. These actuation control pulses are normally applied to control an injector drive circuit that, in turn, controls the duration of activation of one or more electromagnetically-actuated injectors in synchronization with the engine cycle. During engine cranking operations, the widths of the injector actuation control pulses are also integrated on a capacitor to generate a voltage that is compared with a temperature dependent reference voltage selected to represent an incipient flood condition. When the capacitor voltage is detected as having increased to this reference voltage, the comparator causes an attenuation of the injector actuation control pulse. In one embodiment, the injector actuation control pulse is attenuated by being inhibited for the remainder of the cranking period after which the capacitor is suitably discharged.

Abstract: To provide for rapid interruption of the combustion process in an internal combustion engine, for example by inhibiting ignition or supply of fuel by a fuel injection system, speed pulses are integrated and the integrated signal evaluated with respect to a reference to determine whether the integrated signal, and hence the speed of the engine, exceeds a predetermined level; a timing circuit is connected to the evaluation circuit to provide a control signal for a predetermined time interval to inhibit fuel combustion of the engine for the predetermined time interval in case the speed is exceeded. If fuel injection pulses are to be inhibited, then the timing of the timing circuit is synchronized with the fuel injection pulses to provide for complete suppression thereof without pulse overlap.

Abstract: In an electronic fuel injection system for internal combustion engines a voltage multiplier is used to amplify a manifold absolute pressure signal by an amplification factor which is related to throttle position. A dc voltage related to throttle position is converted to a digital signal which controls a bilateral switch which in turn regulates the feed back resistance in an operational amplifier thus regulating the operational amplifier amplification factor. The manifold absolute pressure signal is amplified by the operational amplifier. The resultant signal determines the fuel injector open time.

Abstract: In an internal combustion engine its crankcase defines an oil reservoir and a pump receptacle. A crankshaft journaled in the crankcase carries a crank in the reservoir. A cylinder fixedly mounted on the crankcase is formed with a cooling jacket which communicates with the pump receptacle through communicating bores in the cylinder and crankcase. A pump shaft rotatably secured in the crankcase in the receptacle carries an impeller for common rotation about an axis parallel to the axis of rotation of the crankshaft, and the motion transmitting input member of a drive train, a toothed wheel, is mounted on the crankshaft next to a spur gear which meshes with a spur gear on the pump shaft.

Abstract: A pulse train of a first frequency is generated, for example representative of speed of an internal combustion engine, and counted in a counter in a first counting cycle until the counter reaches a predetermined count number, the counter then being reset; a second frequency signal, for example a multiplied frequency derived from the first is then applied to the counter during a second count cycle, the counter stopping to count when current flow through the ignition coil of a predetermined level is sensed, and establishing a count number from which the counter can start counting at the next subsequent first cycle. The ON time of ignition current flow is controlled to commence at the beginning of the second count cycle, terminating at the ignition instant, as controlled by an ignition time control arrangement.

Abstract: A pneumatic control apparatus is disclosed for an engine exhaust emission control device which includes a passage 101 for applying a negative intake passage pressure to a chamber of a differential pressure responsive unit 10 an atmospheric venting vacuum control valve 30 is provided for selectively venting the passage 101. The negative pressure chamber 37 of the valve 30 is controlled by an orifice unit 40 which supplies atmospheric pressure and/or negative pressures from spaced positions in the intake passage proximate the throttle valve 2 via flow restrictors 43, 44, whereby suitable response delays are provided. A further restrictor and check valve connected in parallel may also be employed to alter the response time. The proper selection of the restrictor flow resistances and the biasing spring strengths in the various control valves enables a wide range of operational control.

Abstract: A vacuum actuated system comprises a carburetor induction passage having a plurality of vacuum ports, vacuum servo means, fluid network means connecting the plurality of vacuum ports to the vacuum servo means and control means for selectively opening and closing communication between at least one of the plurality of vacuum ports and the vacuum servo means.