Abstract: A cylinder lock with a hollow cylindrical shell that defines a plurality of shell tumblerways and is longitudinally movable in a shell cavity defined by a housing. Received by the hollow shell is a plug that defines a keyway for receiving a proper key and a plurality of plug tumblerways aligned with the shell tumblerways. The plug is rotatable within the shell but is longitudinally restrained therein. A plurality of locking tumblers are accommodated by the aligned shell and plug tumblerways and are movable from biased locked positions into open positions by a proper key in the keyway. Also responsive to a proper key is a control tumbler that can be moved out of a biased, latched position into a release position. The control tumbler obstructs longitudinal withdrawal of the shell from the shell cavity when in its latched position and permits withdrawal when in its release position.

Abstract: A key holder comprises an elongate, resilient member adapted to receive thereon a plurality of keys which have respective member receiving apertures in their heads. The member is configured to provide a coiled intermediate portion and a pair of leg portions which extend therefrom at an acute angle. The ends of the leg portions remote from the intermediate portion are configured to provide means for releasably clasping the leg portions together when the same are compressed toward each other by the hand of a user. The overlying sections of the intermediate portion contact each other adjacent one leg portion and diverge from each other toward the other leg portion. Sliding of a key from a segment of the intermediate portion is substantially inhibited without manual aid and a key can slide relatively freely on the overlying sections over a majority of their lengths. This permits the user to isolate one key from the other keys so that the key can be more conveniently used.

Abstract: An improved method and apparatus for shaping sheets of thermoplastic material is disclosed in which sheets are pressure molded against a mold member by the direct application of a liquid coolant under pressure thereto. The coolant contacts the surface of the sheet and upon pressure reduction vaporizes and accordingly, due to the heat of vaporization effect, rapidly absorbs a large amount of heat from the sheet so as to form a solidified skin on the outer surface of the sheet after or simultaneously with the shaping of said sheet. The sheet thus remains in the mold for a shorter dwell time inasmuch as the sheet becomes more quickly shape retentive because of the rapid cooling. This accordingly permits smaller and less bulky equipment to be utilized in sheet shaping processes. The attendant reduction in equipment size can result in substantial cost savings for such equipment.

Abstract: Apparatus for forming a sheet metal strip into metal ferrules comprising edge guide means to feed a continuous metal strip into a pair of trim rolls to cut the metal strip to a desired width, and means engage the surplus portion of the metal strip and guide it through a controlled path to return to the edge guide means. A pair of notching or cutting rolls notch the metal strip transversely at axially spaced portions for forming ferrule sections in the continuous strip, and a plurality of pairs of forming rolls for engaging the strip and rolling it to substantially cylindrical shape, which pairs of rolls each have one resiliently positioned roll mounted on a frame by laterally extending support plates.

Abstract: A rolling mill for rolling wire or rod product having a plurality of roll stands arranged one after the other, each having at least three driven rollers and in which the distance between at least two adjoining successive stands forming a group is not substantially greater than the roller diameter of the stands and the last sizing pass of each group of stands has a regular cross section in relation to the first sizing pass of the next following group.

Abstract: A heavy duty axial adjustment mechanism for a rolling mill roll neck which is rotatably supported in a radial bearing contained in a chock. A rolling element thrust bearing has its inner race fixed axially in relation to the roll neck. The outer thrust bearing race is axially confined between separable retainer components which are interconnected by fasteners. The retainer components each have external adjusting threads in engagement with internal adjusting threads on the chock. Rotation of the interconnected retainer components imparts axial adjustments to the roll neck relative to the chock without subjecting the fasteners to damaging thrust forces.

Abstract: This disclosure relates to an improved metal duct drive bending tool. The improved metal duct drive bending tool of this disclosure is a portable metal frame type apparatus which uses the pivoting action between two pivotable members of the frame, one of which has teeth, to form a drive at the end of a metal duct that is inserted into a pocket within the frame apparatus between the two pivotable members. The improved metal duct drive bending tool uses the teeth on one of the pivotable members to permit the insertion of various widths of metal duct end portions to be bent.

Abstract: A press featuring double-ended pressing action upon the blank, made use of in pressforging practice. The frame of the proposed press mounts the slides carrying the female die halves and those carrying the male dies, both of said groups of slides reciprocating towards each other. The slides carrying the male dies are actuated from the hydraulic power cylinders linked with their movable members to the slides through lead screws which in turn interact through their threading with the fly-wheels rotatably mounted on the frame. The essence of the invention resides in that the lead screws with their one end are movable associated with the male-die carrying slides and with the other end they are locked-in with the movable members of the hydraulic power cylinders actuating said screws, while the flywheels are interconnected through a mechanical gearing.

Abstract: A power hammer with opposed movement of a ram and a bolster. The hammer has a stationary main frame accommodating, with provision for vertical displacements, a power frame. A bolster supporting a blank is attached to the power frame. Also, attached to the power frame is an actuating cylinder provided with a space above its piston serving as a gas chamber, a space below its piston filled with a fluid, and a piston rod carrying a ram with a top die. The hammer also incorporates a mechanism for accelerating the power frame by an additional force equal to, or exceeding by a specified amount, its weight. The mechanism includes spaces provided in the lower portion of the power frame and communicating with the space below the piston of the actuating cylinder, as well as vertical plungers extending inside each of the lower portion spaces and resting on the main frame.

Abstract: An instrument for measuring the air permeability of cigarette paper, including a paper-clamping head arranged to expose a fixed area of paper to a flow of pressurized air from an air pump. A manometer is arranged to measure the pressure differential across the paper and the gas flow is controllable by a control valve to enable a predetermined pressure differential to be maintained. The flow rate through the paper is measured by one of three flowmeters arranged in three parallel gas supply passages for measuring the flow rate in a low medium and high flow rate range respectively. The paper clamping head is such that the flow impedance downstream of the tapping point of the pressure transducer is negligible.

Abstract: An electric device is disclosed which is intended to detect and to signal the beginning of the settling of the solid phase of a solid-in-liquid suspension of a particulate, said suspension flowing in a duct for long-distance conveying of said particulate. The device essentially comprises a set of polarizing electrodes and a set of detecting electrodes. The signals delivered by the device are properly displayed after processing and characteristic patterns of the suspension flow can be viewed on an oscilloscope or, if desired, graphically recorded.

Abstract: A liquid dye penetrant composition for use in non-destructive testing of objects to locate cracks and other defects or flaws therein, said composition comprising a liquid vehicle, preferably a nonionic surfactant such as an oxyalkylated aliphatic alcohol, and a single phase liquid red azo dye composition consisting essentially of C.sub.5 -C.sub.12 alkyl beta naphthols, particularly C.sub.7 H.sub.15 beta naphthols, and containing a liquid organic viscosity depressant compatible with the azo dyes, such as xylene, as represented by the dye composition marketed as Automate Red "B", and which is substantially free of insolubles. The dye penetrant composition may include an extender, preferably an isoparaffinic solvent consisting essentially of a mixture of isoparaffins having a chain length of about 10 to about 17 carbon atoms, and an average chain length of about 13 to about 14 carbon atoms.

Abstract: A system for measurement of ocean current near the surface wave field. The system includes a controlled buoyancy platform having a current sensor. Upper and lower plural roller assemblies are affixed to the platform for limiting platform motion along a guide line. In one form, each guide assembly includes a plurality of rollers adapted to freely track the guide line so that the platform is both substantially free to move along the guide line in response to pressure gradients from the surface wave field and also substantially decoupled from twisting and axial motions of the guide line.

Abstract: Liquid level indicating floats which may be used, for example, to measure the level of gasoline in a fuel tank or to monitor the flow of fuel through a carburetor. In one embodiment, the float comprises a generally cylindrical body portion which terminates in an outwardly protruding cylindrical ledge having an upper surface and a lower surface, the ledge having a predetermined thickness. A supporting arm is provided which includes a loop which engages the lower surface and an elongated end portion extending from the loop which engages the upper surface of the ledge to secure the supporting arm of the float. In another embodiment of the invention, the float comprises a cylindrical body portion having two chordal grooves cut therein to allow for insertion of a loop having linear portions, the linear portions adapted to engage the chordal grooves.

Abstract: The idle speed of an engine is controlled in response to a control signal derived from the voltage across a thermistor responsive to the temperature of the engine cooling water. The thermistor voltage level varies exponentially with temperature changes. An engine idle speed control signal generator circuit includes a network of resistors, diodes and a transistor which produces an output control signal whose maximum level is limited to a value corresponding to a desired maximum idle speed, and whose minimum level is maintained above a value corresponding to the minimum desired idling speed. The circuit also adjusts the level of the output control signal to compensate for varying engine loads and faults in the circuit.

Abstract: A flueric nozzle-baffle combination for remotely measuring the surface terature of either a stationary or moving object. The flueric nozzle opens to a sensing head which is preferably parallel to and opposed from the baffle surface of the object whose temperature is being measured. The back pressure of the fluid flowing through the nozzle is a function of the resistance to flow between the sensing head and the baffle which, in turn, is a function of temperature. If the distance between the sensing head and the baffle surface can be maintained constant, or can be measured by an auxiliary proximity sensor, the temperature may be computed as a linear function of sensed back pressure.

Abstract: A differential temperature detector comprises two springs made of a shape memory effect alloy. The springs are oppositely stressed and are coupled together in stressed condition. When the springs are subject to the same temperature, no movement occurs when that temperature changes, but when the springs are subject to different temperatures, movement occurs dependent on the temperature difference.

Abstract: An improved apparatus for collecting atmospheric samples, particularly air samples, comprises a sealed first container filled with liquid such as water, a sealed second container positioned below the first container, a vent in the first container which allows the atmosphere surrounding the apparatus to enter the first container at a controlled rate, and a vent from the second container for dispersing the atmosphere contained within the second container into the surrounding atmosphere at a controlled rate. A flow channel between the first and second containers allows the liquid in the first container to pass into the second container. Passage of the liquid from the first container to the second container creates a vacuum in the first container whereby a stream of air from the surrounding atmosphere is drawn at a controlled rate through the first container vent and into the first container where it is retained. Samples may be withdrawn from the first container through the use of a hypodermic syringe.

Abstract: An imbalance determining system for a dynamic balancing machine for two-plane balancing of rotary elements such as vehicle wheel-and-tire assemblies includes a chuck and spindle mounted in a spindle housing in vibration-isolation orientation on a machine base. The rotary element is brought to speed by one or more drive mechanisms which are mounted on the machine base to move between a driving orientation in contact with the rotary element and a storage orientation out of contact with the rotary element. Vibrational forces resulting from imbalance in the moving rotary element are trasmitted through the spindle to the housing. Two vertically spaced load cells are mounted adjacent the spindle housing, and are responsive to forces transmitted through the spindle to generate input electrical signals related to the amounts and locations of imbalance in two planes of the rotary element.

Abstract: A pressure responsive spring element for a gauge is made from cold worked metal.

Abstract: A strain gauge element having an elastic beam with field effect transistors deposited on one surface arranged in a Wheatstone bridge so that deformation of the beam produces a proportional imbalance signal across the bridge, and means for applying a gate biasing voltage to the transistors with at least one such voltage being adjustable so that the bridge can be electrically balanced for a null or no load condition.

Abstract: In a pushbutton tuner in which a tuning carriage is designed to be laterally positioned by a selected one of a plurality of carriage levers which are designed to slip with respect to the carriage as the carriage is moved, a reduced degree of force is required for moving the carriage by making the levers normally loosely associated with the carriage so that relative motion between them involves little or no friction, but in which the carriage lever operative at any given time to position the carriage is urged into snug engagement with the carriage thereby to eliminate backlash and achieve high accuracy tuning.

Abstract: A linear actuator for converting rotary motion to linear motion including an elongated rotary threadless shaft and a rider assembly mounted for movement axially of the shaft and carrying rollers mounted for rotation about their respective axes with their surface in frictional contact with the shaft. The roller's axes are disposed at an acute angle with respect to the shaft so that as the shaft is rotated the rider assembly will move along the shaft and carry with it such parts to which it may be attached.

Abstract: A car side window glass lifting mechanism is disclosed, in which the problem of pre-tensioning the operative wire in a mechanism of the single-shaft, wire-actuated type, is solved by the provision of a rupturable dowel properly located on the wire-winding drum. Means are also provided to stop the motion of a reducing gear which is intended for providing a correct relationship between the gearwheel of the gear in order to obtain a correct positioning of the active component parts as a function of the position of the glass window within its window frame.

Abstract: A fuel flow control lever is pivotably mounted for movement between fuel-off and fuel-on positions wherein it respectively engages first and second stops. A solenoid has its plunger linked to the control lever and when the solenoid is deenergized, a spring acting on the plunger holds the latter in an extended position wherein it holds the lever in its fuel-off position. A pair of coils surround the plunger and are selectively simultaneously energizable to retract the plunger to effect movement of the lever to its fuel-on position. The linkage between the plunger and lever is yieldable and the lever reaches its fuel-on position prior to the plunger becoming fully retracted. Upon the plunger becoming fully retracted, a normally closed switch is opened to de-energize one of the coils.

Abstract: An automatic drive chain tensioner having a pair of idler assemblies, with each idler assembly comprising an idler sprocket and an indexing sprocket on each side of, and concentrically connected to, the idler sprocket with each idler assembly being adapted to be positioned on the outside of a drive chain loop on a chain run between a drive and driven sprocket with the idler sprocket thereof adapted to be engaged in the drive chain and with the idler assemblies on different and opposite spaced-apart drive chain runs; and a pair of indexing chain loops, each one of which is adapted to engage an indexing sprocket on each of the spaced-apart idler assemblies on the same side of the drive chain. Desirably, the idler sprockets are the same size and, desirably, the indexing sprockets are the same size but not necessarily the same size as the idler sprockets.

Abstract: A servo device is disclosed intended for amplifying the force in a mechanical control apparatus, movable in two opposite directions when said apparatus is displaced in either direction, comprising two gears rotatably disposed in a housing and coaxial with a rotatable shaft. The gears are driven in counter-rotation by a conical pinion or by two counter-rotating cylindrical pinions in driving relation to a rotatable servo motor. A nut is screwably arranged on screw splines on the shaft between the gears. When screwed along said splines, the nut comes into frictional contact via annular friction surfaces with corresponding annular surfaces on the gears. The nut, the splines and one of the gears make a releasable driving connection with each other. Radially directed arms are attached to the shaft and the nut with control cable attachment means for transmitting the input operating force to one arm while an additional force is contributed from either gear via the shaft and splines to the other arm.

Abstract: A lever control for an engine transmission and the like having a transverse shaft secured in spaced frame plates and a face plate or cover traversing the outer edges of said spaced plates. A handle lever extends through the face plate and is connected to a control actuator plate rotatable on the shaft, and a detent operable from the handle lever is biased to normally engage selectively in a notched positioning gate mounted on one of said frame plates. An arcuate housing enclosing the gate and detent is mounted on the handle lever extending through the face plate. A preferred embodiment has a visual indicator showing the control positions which is illuminated to be visible day and night.

Abstract: A twistable type throttle-grip assembly especially adapted for use with motorcycle-like vehicles manipulates a single control cable and is normally operational in a first rotational range for controlling the supply of fuel to the vehicle's internal combustion engine thereby controlling the vehicle's speed and is provided with an integral latch mechanism which may be operated by the thumb of the operator while holding the hand grip to release the hand grip for rotation into a second rotational range associated with the operation of a cable controlled, combustion cylinder compression release device on the engine to turn off the latter and permit manual pedaling of the vehicle.

Abstract: A latching and locking arrangement for pushbutton controls is disclosed. A latch carries a plunger resiliently biased by a compression spring having a stronger rating than a pushbutton return spring. The latch is pivoted so that the plunger engages and depresses the pushbutton, after which the latch is translationally moved along its pivotal axis to a latched position wherein a pivot stop prevents rotation of the latch whereby the pushbutton is retained in a depressed position by the plunger. The resiliently biased plunger compensates tolerance deviations between the latched position of the latch and the depressed position of the pushbutton, which deviations were not compensated by an integral solid arm portion of the latch formerly used to hold the pushbutton in a depressed position. An improved pivot stop for the latch is also disclosed. Provision is made for padlock hasp insertion when the latch is in its latched position whereby the pushbutton may be locked in its depressed position.

Abstract: The place shift-up mechanism of a digital clock comprises ratchet feed mechanism which permits manual setting of the clock even during the shift-up operation. The ratchet feed mechanism comprises an eccentric cam secured to a rotary shaft which also carries an eccentric operation pin. A ratchet wheel is rotatably supported by the shaft. A place shift-up lever is supported so as to be capable of rocking and sliding movement and has a forked leg plate with spaced legs receiving the eccentric cam between them. One leg of the forked leg plate has a feed pawl for engagement with the ratchet wheel and also a hook pawl engageable by the operation pin to move the place shift-up lever in one direction. The other leg of the forked leg plate has a return pawl which is engageable by the operation pin to move the plate shift-up lever in an opposite direction.

Abstract: A drive arrangement for sliding roofs, window panes, and other similar sliding members of motor vehicles is constructed for motorized operation and also for emergency manual operation. According to a preferred embodiment, the driving shaft of the drive arrangement has a first part of a clutch constrained from movement therewith and a second part displaceably mounted relative to the first part for interconnecting the drive motor with a drive pinion and for disengaging the drive pinion from the drive motor in a second relative position of the clutch parts. The driving force transmittable between the above-noted clutch parts is controlled by an adjustment member mounted on the driving shaft. The adjustment member can be connected to a manually operable handle for emergency operation of the sliding member by a handle through the use of a locking member which secures the adjustment member relative to the driving shaft in a plurality of positions.

Abstract: To obtain a large number, in excess of 1000, of different speeds for a thread carriage driven by the warp cylinder of a sectional warping machine a multi-speed gear transmission is provided which has two gear mechanisms, each with several gear ratios, interposed between drive input and output shafts of the transmission, the two gear mechanisms being mechanically connected in parallel with the drive input shaft and driving respective crown wheels of a differential gear the planet carrier or spider of which is in turn mechanically coupled to the transmission output shaft.

Abstract: There is described a transmission arrangement wherein a substantially steady-state power source drives an input shaft. The output shaft is selectively driven by gear arrangements between the input and output shafts. The output shaft is driven and accelerated as a function of retardation which is supplied to the gear arrangement between the input and output shafts.

Abstract: In a differential gear mechanism housed in a case and having a power input and having two output shafts extending outwardly through the case for delivering drive torque to the two output shafts, each of said shafts driven by a helical side gear, said side gears axially aligned in contiguous relationship so that the end thrust of both of them is additive toward one output shaft, and a friction-reducing washer is provided surrounding said one of said output shafts in position to take end thrust between the traction gear associated with said shaft and the case, whereby to substantially equalize the torque delivered to the two output shafts; or one or more friction-increasing washers are provided surrounding one of said two output shafts in position to take end thrust between the differential and the case, whereby to decrease the torque delivered to said shaft when necessary to provide a predetermined control of torque, as from a transfer case.

Abstract: A transmission which includes a hydrodynamic torque converter provided in the input side of a stepped gear transmission shiftable under load. The stator of a retarder is connected directly to a housing cover and a counterpressure valve, a lubrication pressure valve and a further valve for controlling the flow of the hydrodynamic unit and of the retarder are provided on this housing cover as well.

Abstract: A drive assembly having a drive shaft rotatably carried in a support for rotation about an axis thereof. An output sprocket is carried on a first carrier of the drive assembly to be driven from the drive shaft by means of a gear assembly including a plurality of sun gears and planetary gears. The second of the planetary gears is rotatably mounted to the carrier. The first sun gear is locked against rotation relative to the drive shaft. The locking structure includes a carrier for carrying one set of the planetary gears and having locking structure cooperating with complementary locking structure on the second sun gear.

Abstract: A system for aligning and regapping the guide grooves on a chain saw guide bar which includes a suitably adapted handheld swaging tool uniquely designed to return bent or worn guide grooves to the correct position and separation. The swaging tool contains a gauge which is adapted to fit in the center of the bar guide groove and a pair of swaging plates which are adapted to force the walls of the bar guide groove into proper relationship with one another upon the application of force to the swaging tool. The system may optionally further include a bar file guide which is adapted to file the peripheral edges of the chain saw bar.

Abstract: The disclosed cutting-tool comprises a stepped-diameter arbor with bearings supporting rotatably thereon a holder carrying the cup-shaped cutting bit. In accordance with the invention, the holder is made up of a hollow shaft and a sleeve encompassing this shaft. The sleeve is journalled adjacent to the cutting bit in one of the bearings located about the stepped-diameter arbor, said arbor having a central bore. The other bearing is accommodated within the central-bore and supports the hollow shaft likewise accommodated in the central bore of the arbor. Owing to the disclosed structure of the holder and its interconnection with the stepped-diameter arbor, sufficient rigidity of the cutting-tool, matched by its compact size is ensured.

Abstract: A rotary anvil construction, method of locking a die-cutting mat on such construction, and locking wedge for use with such construction and method are provided wherein the locking wedge is an immobile wedge and has locking surfaces which are adapted to have cooperating locking surfaces on flanges of a die-cutting mat of the rotary anvil construction snap-locked thereagainst.

Abstract: A bearing-block body member in which a die-cutting roll is journaled includes an adjusting cap seated in it through which a bore extends axially of the roll. An axial chamber is provided in the roll, and a stationary air manifold extends into the chamber, permitting relative rotation between the roll and the manifold. An air tube having an axial portion and a transverse portion has its axial portion extending through the bore in the adjusting cap to couple with the manifold so as to hold it in rotational position but permit axial withdrawal. Fluid communication is provided between the air tube and the manifold, and corresponding ports in the manifold and apertures in the die register periodically to permit air to flow from the air tube through the manifold, the ports, and the apertures to the outer surface of the roll. As a result of this arrangement, air can be supplied transversely of the axis of the roll, but ready removal of the roll and the manifold is afforded.

Abstract: A flying shear for use in a wire cutting-off machine has a cutter head reciprocated along an axis parallel to the path of wire feed. A knife equipped cutoff slide carried by the head moves perpendicular to the path of wire feed and, in cooperation with a cutoff bushing carried by the head, cuts the wire while the head moves in the same direction as the wire to produce a clean cut with little or no marring of the wire surface. The head and the slide are driven by a common drive mechanism, using a single eccentrically driven lever, located entirely above the cutoff bushing to minimize the possibility of its becoming fouled by metal particles and other debris at the cutting zone.

Abstract: An idler roll adapted to engage a moving textile strand is comprised of a plurality of substantially parallel, spaced apart cylindrical rods positioned along a base circle wherein the diameter of the base circle, the diameter of the cylindrical rods and the distance measured along the base circled between the center lines of adjacent rods are determined according to specific predetermined relationships.

Abstract: Transparent storm sash panes are carefully measured and precut for particular window dimensions. The precut rectangular pane is positioned in a gauging slot of a storm sash fabricating apparatus in which an adjustable stop is moved into opposition with a punch unit engaging opposite edges of the pane to thereby establish the proper length of a storm sash frame side to be punched from an extrusion of aluminum or the like. The punch is operated to form an interlocking end on one frame side and simultaneously to form such end on another frame side. Two pairs of frame sides thus produced in the apparatus are placed over the marginal edges of the precut pane, the frame sides being of channel formation, and are secured rigidly at the four corners of the pane by corner end caps or connectors having recesses to interlock with punched tabs on the opposite ends of the frame members. Accuracy of size, durability and economy of manufacturing for the storm sashes are assured.

Abstract: An automatic arpeggio for a keyboard-operated instrument in which a tone generator is assigned to a key when the key is actuated, the fundamental frequency of the assigned tone generator being determined by octave and note data stored as a control word in a memory in response to operation of the key. On keying the different notes of the arpeggio chord on the keyboard and activating an arpeggio Load switch, a control word is loaded in the memory for each key of the arpeggio chord, the words being coded to identify the value of the note and the sequence number of the note in the arpeggio chord. The arpeggio chord control words in memory are transferred one at a time to a tone generator in a sequence according to the stored sequence numbers of the control words. Arithmetic means, in synchronism with an arpeggio clock, generates note sequence numbers by which the control words are addressed in memory. The note value is transferred to the tone generator together with octave information from the arithmetic means.

Abstract: An electronic musical instrument having the key range divided into upper and lower divisions, including a logical circuit converting the change-over position outputs of a key range dividing position selecting switch into gate control signals specifying corresponding key range dividing positions and a plurality of gates controlled by these gate control signals, thereby controlling the distributive mode of keyed tone signals to different tone color filters.

Abstract: A method and apparatus for memorizing and playing back an accompaniment passage in an electronic organ wherein the keyboard is multiplexed to develop a serial input data stream having keydown signals in the time slots corresponding to the depressed keys, selectively writing into a programmable random access memory data corresponding to the absolute address of the first occurring keydown signal in the pulse train and then writing into the memory data corresponding to the intervals, expressed in terms of time slots in the multiplexed data stream, between a number of the first occurring keydown signals, beginning with the first occurring signal. The data is read out of the memory and converted to a serial time division multiplexed data stream by means of comparators which produce a pulse each time there is a compare condition between the output of the memory and the count produced by the master counter/subcounter.

Abstract: An automatic tracking apparatus is provided for maintaining alignment of music rolls in player organs and player pianos using an improved, air pressure controlled, sensing and control device. More particularly this system incorporates an air pressure sensing device utilizing a piston/cam controlled pendulum to operate a pneumatic alignment device.

Abstract: A fold-away stringed musical instrument whose neck is detachable from and stored within its sound box. The instrument is detachable into three main portions: sound box, neck and removable portion of the upper surface of the soundbox. The neck portion is joined to the sound box portion in a tennon-mortise arrangement having a locking pin between the lower end of the sound box and the tennon.

Abstract: The present invention provides a new and improved device for adjusting and maintaining the tension in a string of a musical instrument. The string may be tuned to a first pitch by turning a first knob. This actuates a string post through a series of reduction gears to achieve extremely precise tuning of the first pitch. Then the string may be tuned to a second pitch using a second knob. When adjustable stops have been locked in place, the instrument's tuning may be conveniently and repeatably changed from the first pitch to the second pitch and back again. The reduction gearing provides a smaller change in string tension when the first input knob is turned a given amount than when the second knob is turned the same amount. The device is housed in an aluminum housing which is formed from extruded metal bar stock. A pin projects from the housing to secure the device against rotation with respect to the instrument.