Abstract: A washing basket adapted to be incorporated in a washing machine having a hydroextracting function. The washing basket, which is provided at its bottom with a pulsator, has a plurality of protrusions formed in its inner peripheral wall. Each of the protrusions has an arcuate cross-section whose ridge is directed toward the center of the basket, and is extending in the vertical direction along the inner peripheral wall of the basket. A plurality hydroextracting apertures are formed in each of grooves which are formed between the adjacent protrusions.

Abstract: An apparatus for applying a liquid to a moving web in patterns comprises a means for forming a liquid shroud which falls on the web and at least one nozzle for blowing a fluid medium against the shroud to displace the falling shroud and cause nonuniform application of the liquid to the web.

Abstract: Apparatus for the application of liquids to moving material, such as patterned application of dyes to moving textile material, including a liquid applicator positioned above the material path of travel for continuously discharging liquid in a row of plural streams downwardly onto the material, means for selectively deflecting selected of the continuously flowing streams in accordance with a pattern control device, and collection means for receiving the deflected liquid to prevent its contact with the moving material, and wherein the collection means includes a collection chamber having an opening for receiving deflected liquid, and three collector plates positioned adjacent the lower portion of the liquid-receiving opening to prevent liquid from falling onto the surface of the moving material from the collection means in an unscheduled manner. The primary collector plate being made of very thin metal and being capable of having tension applied to the extremities.

Abstract: A hide stretching apparatus, in particular one for the tentering of hides for drying. The apparatus comprises a stretching frame with a number of mutually spaced radial sliding guides. The stretching clamps gripping the edges of the hide have been arranged to be reciprocatingly movable along the sliding guides. The stretching frame is placed upon a special hide changing table carrying under each sliding guide a clamp displacement member. The clamps carry jaws which attach to the edge of the hide to be stretched. The jaws are opened and closed by means of a lever turnably carried on the clamp. The clamp displacement member has two gripping members, which can be made to engage the clamp on both sides according to commands given, for the displacing of the clamps reciprocatingly along the sliding guides. The clamp comprises a brake engaging with the sliding guide and which with the jaws in closed position prevents the displacement of the clamp towards the center of the stretching frame.

Abstract: A cold forging machine comprises a fixed die 11 and a movable punch tool 13 reciprocable towards and away from the fixed die to act on a workpiece therein. The tool comprises a tubular punch 34 and extrusion pin 33 movable through the punch to form a bore in the workpiece. The die is provided with a tubular ejector 15 in which slides a carrier pin 16 to enter the bore of the formed workpiece to guide it during ejection. A fault detection system includes a switch 25,61 for detecting non-completion of the normal movement of the carrier pin 16 with respect to the ejector 15, and a further switch for detecting non-completion of normal movement of the extrusion pin 33 with respect to the punch 34.

Abstract: An apparatus for controlling axial positions of rolls of a rolling mill to obtain and maintain desired axial rigidity of the rolls. Pre-stress, the axial load and the axial position of each roll are detected. The detected signals are processed to determine the axial positions of the rolls to achieve the desired rigidity.

Abstract: A method of and system for controlling the oil concentration in and the stability of an oil-in-water emulsion used as a coolant-lubricant in a metalworking operation in which a portion of the emulsion is circulated through a sensor to monitor its density and to generate a signal relating the density to the oil concentration. The signal is employed to control addition of oil to the emulsion to thereby control the concentration within close limits. Sensing means also monitors the stability of the circulated emulsion, and emulsifier is added, as required, either to the oil to be added or directly to the emulsion to thereby control both the oil concentration in and the stability of the emulsion.

Abstract: An inclined rolling stand for reducing a starting material to a pipe or rod, which includes a roll carrier adapted to be driven and to permit a central passage of the material to be rolled. The roll carrier includes three conical substantially identical and axially adjustable working rolls which are adapted to be driven and are inclined relative to the rolling axis at the same acute angle. The three working rolls are offset relative to each other around the rolling axis by 120.degree. and are so directed with regard to the rolling axis that their extended axes respectively cross the rolling axis at the same short distances while the narrow ends of the conical working rolls respectively include a smoothing zone representing a surface of rotation about the axis of the respective working roll.

Abstract: The tapered working roller of a skew rolling mill is provided with a deformation surface in the form of a paraboloid and a smoothing surface at the end of smaller cross-section in the form of a technical hyperboloid.

Abstract: A stator core including a central cylindrical opening defined by a plurality of teeth consecutive through a circumferential continuous portion is prepared by winding a magnetic strip having a corresponding shape into a spiral. A forming cylindrical rod having a diameter larger than the inside diameter of the core is forced into that opening, and then a pressure is axially applied to the core to compress it to level the beginning and last edges of the strip. The rod is removed from the core and the pressure is released to complete the stator core having a predetermined inside diameter.

Abstract: The device proposed herein incorporates the following components located on both sides of the roll mill stand: hydraulic dynamometers for absorbing the rolling force; hydraulic cylinders for creating and exerting the adjusting force; and valves for oil pressure control in the hydraulic cylinder interior. The hydraulic dynamometers are situated between the supports of one of the rolls and the roll mill stand housing and the hydraulic cylinders are interposed between the supports of the other roll and the roll mill stand housing.The interior spaces of said cylinder and the dynamometer communicate with pumping units that deliver oil thereto so as to build up a pressure in the spaces which is in excess of the rolling force. The valves regulate the pressure effective in the hydraulic cylinder interior in direct proportion to the rolling force and the deforming force of the elastic members of the device.

Abstract: A strip mill entry guide mechanism having upper and lower platens positioned to receive and clamp strip material passing therebetween. One of the platens is driven by a first drive mechanism toward the other platen into clamping engagement with the strip. This first drive mechanism is locked in this clamping position to prevent its forced retraction therefrom while this same driven platen is further driven into heavier clamping engagement with the moving strip with a second drive mechanism disposed between the locked first said drive mechanism and the platen being driven.

Abstract: Alkylphenol compounds are manufactured by continuous reaction of phenolic compounds with olefins in the presence of a pulverulent polystyrenesulfonic acid exchanger suspended in the reaction mixture. The products are starting materials for the manufacture of dyes, pesticides, pharmaceuticals, emulsifiers, dispersing agents, stabilizers, antioxidants, plasticizers, corrosion inhibitors, disinfectants, seed dressings, aging inhibitors, crop protection agents and scents.

Abstract: An apparatus for detecting the presence of explosives by screening subjects passing through a controlled axis tunnel, the apparatus comprising a substantially open ended tunnel having a cross-section so that subjects can proceed in a single file through the tunnel. The apparatus further comprises a first pair of apertures, one in each side wall of the tunnel located at a first distance from an entrance to the tunnel, and a second pair of apertures, one in each side wall of the tunnel, located at a second distance greater than the first distance from the entrance to the tunnel. Air duct means extend between the various apertures. Also included are means for inducing a circulatory flow of air through the air duct means and across the tunnel between the apertures and, further, means for detecting the vapor of an explosive substance in the air in such duct means.

Abstract: The specification discloses an isolation door assembly which, by virtue of having annuli provided about the joint between the door coaming and the door framing, about the seal between the door and the coaming, and about any penetration of the door by shafts, etc. provides the means to test the door assembly at installation, and at specified testing intervals.By providing pressure fittings (normally plugged) which communicate with the annuli described above, and introducing a testing medium under pressure into said annuli, the integrity of all door seals can be tested.

Abstract: Method and apparatus for detecting the position of defects in a liquid metal handling instruments such as sodium-heated steam generator, which has a conduit structure invisible from the outside of the instrument. The conduit structure, which is used in a liquid metal, is positioned in a vessel filled with an inert gas. The vessel is sealed whereas a liquid inactive to the liquid metal is filled in the conduit structure. If there exists a defective spot in the conduit structure, the liquid will flow out of the defective spot, which is exactly detected by application of a fiber scope.

Abstract: An alien liquid detector employs a monitoring element and an oscillatory electronic circuit for maintaining the temperature of the monitoring element substantially above ambient temperature. The output wave form, e.g., frequency of oscillation or wave shape, of the oscillatory circuit depends upon the temperature-dependent electrical characteristic of the monitoring element. A predetermined change in the output waveform allows water to be discriminated from another liquid, e.g., oil. Features of the invention employing two thermistors in two oscillatory circuits include positioning one thermistor for contact with water and the other thermistor above the oil-water interface to detect a layer of oil if present. Unique oscillatory circuit arrangements are shown that achieve effective thermistor action with an economy of parts and energizing power. These include an operational amplifier employed in an astable multivibrator circuit, a discrete transistor-powered tank circuit, and use of an integrated circuit chip.

Abstract: The coagulation of blood is measured by introducing the blood into an annular gap in a beaker formed between the inner surface of the beaker and a cylindrical member depending into the beaker. The beaker is mounted on the upper end of a rod-like support. A coil arrangement about the lower part of the rod-like support impresses a circular orbiting motion on the support and beaker. Another core associated with the rod-like support measures changes in amplitude of the support produced by the development of fibrin in the blood sample in the annular gap.

Abstract: A mass properties measurement system including a test object support table mounted to a bearing means for supporting the table for rotation about an axis of rotation substantially perpendicular to the plane of the support table; means for measuring overturning forces imparted to the measurement table and bearing means by a test object mounted to the support table, wherein the overturning forces tend to rotate the table and bearing means about a pivot axis substantially perpendicular to and intersecting the axis of rotation; induction motor drive means for inducing rotational forces to said support table and bearing means to rotate said support table and bearing means at a predetermined rate of rotation while remaining substantially invisible to said measuring means, the induction motor being mounted to the mass properties measurement system such that substantially all forces imparted to the system by the motor for rotating the table lie in a plane which is substantially perpendicular to said axis of rotation

Abstract: A device for measuring the power output of an internal-combustion engine comprises a serial arrangement including a pickup for taking up the speed of rotation of the shaft of the internal-combustion engine, a pulse former, a selector for selecting the speed of rotation of the shaft of the internal-combustion engine, a unit for controlling the device, a unit for producing a train of electric pulses, a unit for determining the difference of two adjacent pulse trains, and a unit for recording the measurement results. Connected to the engine shaft speed selector are an engine duty control unit and a clock pulse generator. The pulse train producing unit is connected to the pulse former to which a unit for producing a preset number of pulses is connected. The device control unit and the unit for producing a preset number of pulses are connected to the unit for determining the difference of two adjacent pulse trains and to the clock pulse generator.

Abstract: A timing gage for the unit injector of a diesel engine includes a timing gage sleeve adapted to encircle the extended plunger follower of an injector so as to permit its abutment against a fixed element thereof or of the engine next adjacent to the injector. The contact pin carrys with it a portion of an electrical circuit arrangement, including a timing light that is adapted for movement relative to a contact gage base, secured to the timing gage sleeve, between a closed electrical circuit connection therewith and an open electrical circuit therewith. The contact pin upon engagement with the plunger follower when at a predetermined height is then operative to effect energization of the timing light whereby to indicate proper setting of injector timing for that injector.

Abstract: A hydraulic torque indicator incorporating a gage readable in foot-pounds, which is adjustable for any length torque arm by the use of a link arm and an adjustable hydraulic cylinder connected in a trigonometric configuration which increases the pressure output to the torque gage as the torque arm to which the indicator is connected increases in length, thereby enabling the indicator to give an accurate indication of torque for any length torque arm.

Abstract: A test system and method for in line testing of shock suppressor shut-off valves is provided. Vacuum and fluid canisters are mounted to a backpack that can be carried by maintenance personnel to the operating locations of shock suppressors. The fluid canister contains a fluid for being driven through the shut-off valves of the shock suppressor during testing. Fluid lines interconnect the canisters and the shock suppressor. A valve assembly is disposed within the fluid lines for regulating the rate of flow of the fluid from the fluid canister to the shock suppressor. The system further includes structure disposed within the fluid lines for evacuating the fluid lines and the valve assembly prior to testing of the shut-off valves.

Abstract: Apparatus, for measuring the velocity of flow of a gas, is of the type comprising two ultrasonic probes arranged opposite to one another and transmitting pulses following upstream and downstream paths which are inclined with respect to the direction of flow. A commutation device which enables these two paths to be established is actuated in such a way as to effect change-over of the probes both on transmission and on reception, the commutation command signals being phase shifted with respect to the transmission pulses.

Abstract: In order to enable measurement of liquid flow through channels noninvasively without contact or interference with the flow through the channel, detectors of liquid level and velocity through the channel are installed above and below the channel and transmit and receive only ultrasonic signals. A flow measuring system is operated by their detectors and measures flow in terms of the product of the area through which the liquid flows and its velocity.

Abstract: Device for sampling air in proportion to respiration, particularly the collection of air pollutants in proportion to the actual respiration of the wearer. The device includes a pump supported adjacent the thoracic cavity and activated by the expansion and contraction of the thoracic cavity during respiration, so as to draw air through an air sampling monitor.

Abstract: A device for automatically locking motor vehicle wheels on to balancing mines in general comprises a traction shaft inserted into and rotating rigidly with a hollow balancing shaft, and of which one end is connected axially to the piston of a cylinder-piston unit while its other end is provided with locking means for the support members of the wheels to be balanced.

Abstract: A wheel fitting device for a wheel balancer is disclosed which consists of a hub and several arms which are pivoted to the hub and are bolted to the holes of the wheel. In an embodiment the arms are provided with locking means which lock up their pivotal attachment to the hub when they are tightly bolted to the wheel at their other ends.

Abstract: A method and apparatus is provided for determining the attenuation coefficients within a body of material by transmitting sonic pressure pulses into the material, analyzing the spectrum amplitude of the echoes returning from the boundaries within the material, calculating the attenuation coefficients of the material between the boundaries and comparing the measured coefficients to those of normal and abnormal tissue. The wave shape of the transmitted pulses is adjusted so that the pulses generate echoes with uniform spectrum amplitude (white echoes) from each boundary within the material. Given the characteristics of the pulses which generate white echoes from the boundaries of each tissue segment and given the thickness of the material between each pair of boundaries, the attenuation coefficients of the material are calculated. The attenuation coefficients are displayed in any manner desired, including traditional B- and M-mode displays.

Abstract: Disclosed is a wheel probe for use on a pipe inspection vehicle. The wheel probe comprises a annular perspex outer rim with a polyurethane tire mounted on a hub assembly which, with the hub, defines a fluid-tight chamber containing an acoustic coupling fluid. A number of ultrasonic transducers are located inside the chamber and are positioned close to the inside circumferential surface of the rim. The hub assembly is carried by a spring loaded carriage which is secured through which ultrasound will pass.The wheel probe includes a guide wheel on each side. The guide wheels are carried by the carriage but are moveable bodily relative to the center of the hub assembly, and when deflected, they operate on the assembly to move the wheel probe to ensure that the outer rim of the wheel is correctly aligned relative to the pipe.The wheel probe has a number of shields spaced around its periphery.

Abstract: A semiconductor pressure transducer includes a base member fabricated from n-type silicon. The base member has a central depression defining an active area and located on a bottom surface; diffused in the top surface, is at least one contact area which is directed from the active region towards the periphery of said base member. A piezoresistive sensor is located on said top surface and in contact with said contact area within said active region. A layer of epitaxial material surrounds the active region and has an aperture on the surface which is in communication with the contact area outside said active region. The epitaxial layer is polished at a top surface and a housing is coupled to the region by means of a suitable bond. Alternate methods of fabricating the transducer are shown employing both polycrystalline and monocrystalline epitaxial layers.

Abstract: A circuit including a strain gage bridge having a constant current supply at a constant temperature and otherwise variable with temperature. Linearization and accuracy are obtained through a feedback connection. The constant current and temperature compensation features and common mode rejection are also employed to improve accuracy.

Abstract: A protective pivot pin assembly for chains, and especially conveyor chains, and a chain assembly incorporating that pin assembly. The pin includes a collar telescoped over one end and retained by a retaining ring or other securing member. The collar has a recess which receives the retaining ring therein when the collar is urged against the ring by chain links assembled on the pin. When extended, the combined widths and thicknesses of the links hold the collar over the ring to protect the ring and prevent removal of the ring and premature disassembly of the chain. When entirely relaxed, the chain may be collapsed, allowing the collar to be slid back and the ring to be manually removed.

Abstract: A solenoid actuated control system comprises a solenoid device having a plunger carrying a transverse actuator pin and means for angularly moving the plunger to one of a plurality of predetermined angular positions in which the actuator pin is in operative alignment with a corresponding one of a plurality of instruments.

Abstract: Indexing apparatus is disclosed whereby a constantly rotating drive shaft can intermittently drive apparatus driven thereby. An arm carried by the drive shaft pivotally carries a second arm which has means for engaging a cammed surface whereby the pivoted arm is moved radially toward and away from the drive shaft. The rotated output member is mounted for rotation about the longitudinal axis of the drive shaft and includes a projection adapted to be engaged selectively by an engaging member on the pivoted arm as the pivoted arm is rotated in response to the positioning of the camming surface. In the preferred embodiment, the projection is an extended member and the engaging member is initially brought into contact close adjacent the drive shaft and moved radially outward in a decreasing amount whereby the rotated member is smoothly accelerated. Correspondingly, upon disengagement, the engaging member is moved radially outward in an increasing amount to smoothly decelerate the rotated member.

Abstract: A method for the preparation of a spherical hob for generation of a gear, which has a plurality of hob blades formed on the surface of a spherical hob blank, is disclosed. This method comprises forming spirally on the peripheral surface of the hob blank projections having a section defining an involute tooth profile by means of a cutting tool, cutting and forming a plurality of blade spaces intersecting said projections to thereby form a plurality of spirally continuous hob blades, and forming reliefs on the side faces and peripheral face of each hob blade so that as the blade faces of the hob are cut, the tooth profile of each hob blade corresponds to the tooth profile before cutting with a certain amount of addendum.

Abstract: An apparatus for removing a roll of film on a spool from a camera comprising, a top tong arm having a top grip portion and a top handle portion, and a bottom tong arm pivotally mounted to the top tong arm and having a bottom grip portion and a bottom handle portion. The top and bottom grip portions define a film roll engagement mouth which is openable and closable by moving the bottom handle portion against the top handle portion. At least one of the top and bottom grip portions include lateral guide faces for laterally retaining the spool in the film roll engagement mouth. A biasing spring may be positioned between the top and bottom handle portions for urging the top and bottom grip portions toward each other to firmly retain a roll of film within the film roll engagement mouth. A tensioning lever or knob may be provided which may be engaged with the spool when the roll of film and spool are engaged in the film engagement mouth, for rotating the spool and tightening the film thereon.

Abstract: For use in rotating a bushing of an assembled track, wherein the bushing is press-fitted into apertures of a pair of links, first and second members are securable to one and the other of such pair of links, and a rapidly extendable and retractable cylinder interconnects the first and second members for providing a vibratory motion which, for optimum results, should be at resonant frequency to the links while rotational torque is being applied to such bushing.

Abstract: Apparatus for controlling a tongs arrangement which includes a tongs lift and lift speed arrangement, a backup tong and a power driven tong, is characterized by means for generating electrical signals to lift the backup tong and power tong at a predetermined speed to a predetermined elevation, means for generating an electrical signal to close and lock the backup tong when lifted, and means for generating an electrical signal to drive the power driven tong when the backup tong is closed and locked.

Abstract: The method of making plastic lenses ready for fitting to the contour of the wearer's eye comprising supporting a blank of plastic at one end for rotation about a predetermined axis, turning the blank down to a predetermined diameter, making an annular face cut at the distal end of the blank of predetermined radial width, making a spherically concave base cut at said distal end of predetermined depth relative to said annular face cut, reversing the blank end-for-end, making a first spherically convex cut at said end of the blank of a predetermined radius such that the distance between the inner and outer surfaces is of a predetermined thickness and making a flange cut at the marginal edge of the outer convex surface of lesser radius of curvature; and apparatus for carrying out the method.

Abstract: A cylindrical tool holder is mounted on a a housing containing a motor, the output shaft of which is coupled through a gear train to a driving ring. One axial face of the driving ring has cam surfaces engageable with cooperating cam surfaces on an axial face of an axially movable locking ring which is spring-urged toward the driving ring. The other axial face of the locking ring has axially facing gear-like teeth which are engageable with mating teeth on a flange formed on the housing and on a ring attached to the tool holder. A lock bolt mounted in the housing and operated by an electromagnet is withdrawn from a ring coupled to the tool holder to permit rotation to a new position and is extended to lock the holder near the new position.

Abstract: The present invention is concerned with a method of and apparatus for cutting a slab from a body of uncured light-weight concrete, resting on a support surface. The method comprises the step of moving the body of uncured light-weight concrete along a longitudinal axis of said support surface through a predetermined distance; cutting a slab from said body while supporting the front face of said slab, moving the slab away from said body along an extension of said longitudinal axis; and subsequently moving the slab along at least one arcuate movement path in a plane perpendicular to said support surface and parallel to said longitudinal axis. The apparatus for performing the methods includes a sequentially moveable work feed means, a wire cutter mechanism for cutting a slab from the face of the concrete and a carosel-like pneumatic suction device for holding and transporting the cut slab to subsequent spraying, shaping and stacking stations.

Abstract: Cutting or perforating apparatus for a web of material enabling at least one knife on at least one rotary knife shaft to cut the web at adjustable intervals comprises mounting plates for the knife shaft that are fixed on a rotatable plate shaft. The knife shaft is driven by a central gear freely rotatable on the plate shaft. An operative connection between the plate shaft and control gear comprises a first gear fixed to the plate shaft and engaging a second gear rotatable on a fixed pin, a third gear rotatable on said pin and engaging a fourth gear fixed to said central gear. Said second and third gears are coupled by a mechanism comprising a first gear segment connected to said third gear and engaging a second gear segment secured to a freely rotatable pin eccentrically positioned on said second gear, said rotatable pin also carrying a slotted link slidable on a fixed projection.

Abstract: The present invention relates to a rotary cutter for rounding the corners of a sheet cut from, for example, a continuous web. The rotary cutter is provided with two blades adapted to be brought into engagement with each other while each blade is rotated by a separate parallel shaft. The rotary cutter satisfies three conditions: the first and second blades have the same blade contours with respect to a common curved edge line defining a plane; each blade at each position of engagement satisfies the relationship of .beta. .gtoreq. .alpha., where .beta. is the relief angle of each blade and .alpha. is the nip angle of each blade; R.sub.1 /R.sub.2 =AA'/AA", where R.sub.1 is the radius of rotation of the first blade, R.sub.2 is the radius of rotation of the second blade, AA' is the edge line length of the first blade, and AA" is the edge line length of the second blade.

Abstract: Apparatus for cutting a panel backed by an upright grid and supported edgewise by a horizontal row of rollers, the grid and rollers defining a working surface, includes a power saw that may be moved in the working surface, an abutment which may abuttingly engage a vertically extending edge portion of the panel and thereby bound the working surface in one horizontal direction, and a clamping mechanism vertically movable on a guide column for clamping the edge portion to the column. Unless located so as not to interfere with the start of a horizontal cut, the column and abutment may be moved away from the working surface temporarily.

Abstract: Apparatus for trimming the front, head and foot ends of brochures has a stationary platform which supports one brochure at a time. A first knife which trims the front end of the brochure on the platform descends in a vertical plane ahead of two additional knives which thereupon simultaneously trim the head and foot ends of the same brochure as soon as the first knife completes the trimming of the front end. The first knife is pivoted forwardly and away from the additional knives while the additional knives move toward and trim the brochure on the platform. This insures that the first knife is held out of the way while the additional knives move to positions in which their forward ends extend beyond the trimmed front end of the brochure.

Abstract: A saw guide for guiding a hand powered saw to make a straight cut at any predetermined angle, the device including a solid guide bar and a saw base pad, to slidably fit over the guide bar, comprised of a different material than the guide bar itself, with the material selected to reduce sliding friction between the guide bar and the base pad.

Abstract: In a generator of musical notes for use as an electronic organ or other instrument, particularly of keyboard type, a computer is programmed to provide control and data signals to external hardware in response to the selection of stops and keys. In response to each change of stop a range of characteristic harmonic structures is synthesized digitally to provide single-cycle reference waveforms for storage for so long as that stop remains in use. In response to the selection of a key in that stop an appropriate reference waveform is sampled, or interpolative sampling is performed between two waveforms, so that an harmonic structure is produced by sampling which is precisely related to the position of the key in the register. The pitch of the note to be reproduced from the digital samples is determined by the rate of sampling which can be finely resolved.

Abstract: An electronic musical box is disclosed in which a musical score can be readily stored and reproduced and the musical score can be easily changed to another. The musical box includes a pulse generator for generating a unitary pulse for a note whose duration is the shortest in the musical score and generating integer numbers of unitary pulses for other notes in the musical score. A tone pitch generating circuit generates tone pitch signals coded by a plurality of tone pitch switches so as to correspond to the tone pitches of the notes in the musical score. The coded tone pitch signals are stored in a memory, and a musical tone generating circuit reads data stored in the memory and generates musical tones.

Abstract: Circuitry for generating rhythmic patterns of notes corresponding to notes of a selected chord wherein tone signals according to the notes of the selected chord are connected to the inputs of keyers each time a chord playing key is depressed and control a current which flows through the keyers to the organ output circuitry in accordance with a selected pattern sequence of notes which is provided to a plurality of envelope generators at a rhythmic rate. The keyers are grouped to correspond to the four components of a selected chord and each of the keyer groups has an individual envelope generator connected thereto which activates the keyer group under the command of the selected pattern and imparts a characteristic attack and decay envelope to the tone signal.