Abstract: A phase locked loop system for receiving a data input with a predetermined bit frequency includes a source (10 D.sub.1 D.sub.2) of clock signals with a frequency nominally equal to the bit frequency of the data signal means (12,13,14,15,16) for dividing each clock period into three regions corresponding to early, normal and late arrival of the data signal relative to the clock signal and means (D.sub.3 D.sub.4 D.sub.5) for deciding which region the data signal occurs in and for respectively advancing or retarding the phase of the clock signal if the data signal occurs in the early or later region.

Abstract: A device for applying a lubricant coating to strip material subsequently formed in an operation which necessitates uniform application of the lubricant. Propulsion rolls pull the strip through a lubricant bath and squeeze off excess lubricant to leave a relatively heavy and somewhat uneven coating of lubricant. The propulsion rolls drive the coated strip between metering rolls which have hardened metal surfaces roughened by grit blasting to achieve a uniform, pitted effect. The metering rolls exert substantial pressure on the thickly coated strip and cause separate and independent, limited volume patches of lubricant to be defined and adhere to the strip uniformly across its surfaces.

Abstract: A data processing network has a plurality of data processing stations which communicate over a bus. Each station is inductively coupled to the bus. Data is transmitted in a binary coded form in which a zero is represented by a pair of oppositely poled pulses and a one is represented by the absence of any pulse. The transmitter circuit includes an energy saving circuit for recovering energy from the backswing of each pulse. Preferably the bus consists of a twisted pair of wires.

Abstract: A negative resistance element having two terminals (11, 12;) a resistor (R1-4) connected in a path between the terminals, and a current mirror arrangement (T1, T2; T3, T4;) responsive to a current flowing into the first terminal (11) to produce a current through the resistor R1-4 in such a direction as to increase the voltage of the second terminal 12 relative to the first terminal 11.

Abstract: A voltage controlled negative resistance with two terminals (12,13; 15,16; 19,20) and first and second current paths connected between the terminals. A current mirror arrangement (T2, T3; T5, T6, T7, T8; T9, T10) so controls the current in the second path in accordance with the value of the current in the first path such that any variations of current in the second path are larger than in the opposite sense to variations of current in the first path.

Abstract: An emergency hydraulic system for a vehicle having a hydraulic steering mechanism normally supplied by an engine driven pump. An electric motor driven pump supplies the steering mechanism under emergency conditions. The electric motor driven pump is inoperative during normal operation of the engine but if the engine ceases to operate it comes on responsively to the occurrence of a predetermined condition in the hydraulic circuit. In order to prevent the electric motor driven pump from operating during engine starting a relay is provided having a normally open switch in circuit with the motor. The relay is operated by a normally open engine condition switch which is arranged to close when the engine is running. The relay holds itself in, thus preparing the electric motor for operation should the predetermined condition occur in the hydraulic circuit of the steering mechanism.

Abstract: A method and apparatus for presenting real-time information for viewing is disclosed wherein a projection lens projects an image of a liquid crystal display onto the surface of a holographic optical element diffuser. The liquid crystal display is driven so as to contain real-time information and is illuminated by substantially monochromatic light. The diffuser diffracts the real-time information to a pupil at a viewing focal plane with preselected illumination intensity so that the real-time information can be viewed in diffuse form anywhere across the pupil.

Abstract: A shutterless hologram movie apparatus using an incoherent (non-laser) light source in the viewing apparatus. Image immobilization and dispersion compensation are both accomplished with the same reference beam-forming optics. The hologram film is imaged onto the exit pupil by means of a converging lens or mirror in the vicinity of the image. As the hologram film is drawn vertically across the reference beam, horizontal time frame bands on the film scan the exit pupil, resulting in apparent motion of the image.

Abstract: In the straightening machine of the invention, pivot plates are provided for mounting and pivotally supporting the upper movable rolls including the pinch rolls and the straightening rolls, whereby improved operation can be obtained. Expensive manufacturing costs can be reduced by employing pivot plates as disclosed by the present applicant. The task of maintenance is also reduced since fewer hours are needed for repairs whereas roll bearing capacity is materially increased. The pivot plates are pivotally supported by the side frames respectively having location adjacent the inside surface of the side frames and bearing units are mounted in the free ends of the pivot plates. It is possible to stagger the bearing units since the bearing units for the lower rolls are mounted for rotation in the side frames whereas the bearing units for the upper movable rolls are mounted in the pivot plates.

Abstract: In the apparatus as herein disclosed, the strip material passes between a lower driven roll and an upper idler roll which is mounted on a vertically adjustable bracket member that maintains a square position at all times since it is trapped between the main support members of the housing. When the clamp screws are loosened the bracket will not cock or misalign. The upper idler roll is pivotally mounted on the bracket member for movement to and from the lower driven roll and pressure means in the form of an air bag is associated with the idler roll pivot arm, having a location outwardly beyond the idler roll.

Abstract: In punching, cutting and forming presses and the like, electronic detecting means and/or sensors are provided so as to trip the press and prevent an operation when a mal-function occurs such as a tear in the strip material or a mis-alignment or a mis-feeding of the strip. When the press is equipped with an elbow arrangement to permit adjustments for feed line height while maintaining feed cycle synchronization, then the arrangement must incorporate the automated locking device of the invention, the same automatically unlocking the swing plate simultaneously with the tripping of the press.

Abstract: A circuit is provided for monitoring a signal generated by an oscillator and producing a digital display of the sign and magnitude of the deviation of the actual frequency of the oscillator-generated signal from a preselected desired frequency. Alternating sampling and display period pulses are produced in the circuit and, during the period of a sampling pulse, clock pulses are produced at a rate proportional to the actual frequency of the oscillator-generated signal. A plurality of counters in the circuit count the number of clock pulses produced during the period of a sampling pulse and hold the count during the period of a display pulse succeeding the sampling pulse. Read only memory devices sense the count held by the counters and decode the count to drive display units either to display the magnitude and sign of the deviation when it is within a predetermined range or to display an out-of-range indication.

Abstract: Certain steps in the present method of uncoiling and straightening strip material require that the pivotally mounted straightening machine have an inclined position as when operating on rather heavy and thick material. However when operating on thin strip material the pivotal straightening machine is horizontally positioned and substantially the same method steps are performed in passing the strip material to an accumulation pit. Also the coil is contained during operation to prevent uncontrolled expansion of the internal convolutions and stripping of the initial convolutions from the rotating coil and bending the same in a direction reverse to the curvature when on the coil is also contemplated by the method disclosed.

Abstract: The invention relates to a train of gears housed within a gear box and designed for driving the lower straightening rolls of a feeding and straightening machine. The gears in the gear box are disposed in staggered relation in adjacent parallel planes and each drive gear is journalled by a drive shaft having a coupling connection to a straightening roll. The staggered arrangement of the drive gears is an important feature since the drive gears have pitch diameters greater than the center to center distance between adjacent straightening rolls. In addition to staggering the drive gears the invention provides idler gears which are interposed between adjacent drive gears, with one idler gear in one plane receiving the drive and the other idler gear in the adjacent parallel plane transmitting the drive.

Abstract: An interconnect circuit arrangement for patching a simplex or half-duplex radio network into a standard telephone system. It includes means for sending beep tones to the parties at the end of each message so that they can readily recognize when each is supposed to talk. The tones are sent automatically when the party on the telephone system concludes his messages, and under manual control of the party at the radio end when he concludes his. Special access codes are provided to prevent unauthorized access to the radio system and to set the circuit for special functions. Various override features are included to facilitate operation and avoid time delays that have heretofore tended to hinder conversations in VOX simplex and half-duplex radio systems.

Abstract: A gear and cam housing journals the shaft for intermittently driving the lower feed roll by means of conjugate cams, and by adjusting the vertical position of the housing, the feed line height is likewise adjusted. The invention provides a timing belt drive from the main drive shaft for the press to the drive shaft for the conjugate cams which will permit adjustments for feed line height while maintaining synchronized feed cycle and press timing relationship. Specifically, the apparatus includes a pair of sprockets and timing belts arranged to form an elbow, with one belt operatively connecting the press drive shaft with one timing sprocket at the elbow and wherein the other timing belt operatively connects the other timing sprocket with the drive shaft for the conjugate cams.

Abstract: In the uncoiling and straightening apparatus of the invention, the leading edge of the uncoiled strip material is caused to pass through a straightening machine which is supported for pivotal movement on a horizontal axis so that the machine may be moved to and from horizontal and inclined positions. The shaft providing the horizontal axis also supports a roller and the strip material is caused to contact the roller when the straightening machine is operating in an inclined position. Also to facilitate the uncoiling and bending operations on the material, a stripping apron and a back-breaker roller are incorporated in the apparatus, with the said stripping apron having pivotal movement on the said horizontal axis.

Abstract: In the strip feeding apparatus of the invention, the strip material passes between a lower driven roll and an upper idler roll which is mounted on a vertically slidable adjusting plate so as to move in a pivotal manner towards and from the lower driven roll. The idler roll is mounted on the adjusting plate by means of a pivotal bracket, whereby the idler roll and its bracket can be adjusted bodily in a vertical direction to and from the lower driven roll without disturbing the action of the pressure means forcing the idler roll towards the driven roll and without disturbing the action or timing of the actuating cam which periodically produces a lifting of the idler roll against the pressure of the pressure means.

Abstract: In the strip feeding mechanism of the invention, the main drive shaft drives meshing bevel gears on secondary shafts respectively, which extend in opposite directions with one secondary shaft being journalled by a main bearing cartridge unit. The said cartridge unit is characterized by a concentric surface and by an eccentric surface which is adjacent to the annular flanges of the unit. This novel feature of the cartridge unit enables the secondary shaft journalled thereby to be secured in the housing wall so as to eliminate all clearances in the bevel gearing and also to eliminate all clearances in the conjugate cam arrangements which are driven by this secondary shaft.

Abstract: The present invention is directed to an improved fastener for a hollow wall.