Abstract: A feedforward controller for controlling the polarization state of an optical signal. The feedforward controller includes an optical input for receiving an optical input signal having an input polarization state, an optical output for transmitting an optical output signal having an output polarization state, a polarization controller coupled to the optical input and the optical output, and a transfer function determiner for determining a characteristic polarization transfer function of the feedforward controller from the input and output polarization states. The polarization controller is adapted to modify the polarization state of light passing therethrough in dependence on the characteristic polarization transfer function of the feedforward controller.

Abstract: Polarization multiplexing by encoding data using a return-to-zero format, and by interleaving the constituent orthogonal polarization components such that the data-carrying portion of the bit window from one orthogonal polarization component occupies the zero portion of the bit window for the other orthogonal polarization component.

Abstract: A gaming machine includes a processor and a presentation device coupled to the processor. The processor is programmed to determine that a free play trigger condition is satisfied, and to execute one or more free plays based on the free play trigger condition to create one or more free play outcomes. Each free play outcome is a winning free play outcome or a non-winning free play outcome. The presentation device is configured to present winning free play outcomes when at least one free play outcome is a winning free play outcome. Non-winning free play outcomes are not presented.

Abstract: An aboveground fueling system for storing a fluid includes a storage tank constructed and arranged to store a combustible fluid and an outer container to provide secondary containment for the tank and other components utilized in the aboveground fueling system. An interstitial space may be provided between the storage tank and the container. That interstitial space may at least partially include the other components of the system, including batteries, at least one integrated panel dispenser (IPD), storage for energy capturing and canopy systems during transportation of the fueling system, and a pumping and metering system. A pump of the pumping system is positioned above a meter of the metering system. Accurate meters and energy efficient and energy capturing systems accommodate for retail “off-grid” use of the system and dispensing station.

Abstract: An aboveground fueling facility for storing and dispensing a combustible fluid such as gasoline includes a double-wall storage tank that is constructed and arranged to store the combustible fluid in a fire resistant tank and box. The double-wall storage tank may have a first head and a second head that act as ends of the box. The box may have paneling that is fire resistant and can withstand varying weather conditions. The double-wall storage tank may be fluidly connected to a pumping system. The aboveground fueling facility may include a collapsible canopy, among other features.

Abstract: An electric strike which provides vertical adjustability of the position of the strike relative to the latch bolt in the closure with modification to the doorframe on the dust box. A ramp element in the strike housing is adjustable relative to the strike and is securable at the time of installation to align the center of the latch bolt and strike. The ramp element has a channel to allow entry and exit of a latch bolt having a dead latch. A keeper engages the dead latch and maintains it in a retracted position when the closure is locked and is released when the electric latch solenoid is energized.

Abstract: A collating conveyor (4, 6) receives products (2) sequentially from a delivery point and collates them into groups (8). A pusher (9) transfers groups (8) of products from the collating conveyor (4, 6) to a receiving trough (10), where they are turned through a predetermined angle B. The collating conveyor (4, 6) is inclined to the horizontal and is provided with lugs (5, 7), each of which supports a stack (8) of products under the effect of gravity. A pick-and-place head (11) picks up a group (8) of products from the trough (10) by gripping and clamping the products (2) together.

Abstract: A polarization mode dispersion compensator that includes two stages, one for reducing or eliminating first order polarization mode dispersion of an optical signal, and second stage for reducing or eliminating higher order polarization mode dispersion of the optical signal. In each stage, the polarization is adjusted so as to reduce polarization mode dispersion. Based on the power levels of various polarization states generated at the second polarization controller, the optical signal to noise ratio may be estimated. Furthermore, based on the amount of adjustment used to control the polarization controllers and the differential group delay, the polarization mode dispersion may be estimated.

Abstract: An electric strike which provides vertical adjustability of the position of the strike relative to the latch bolt in the closure with modification to the doorframe on the dust box. A ramp element on the strike housing is slidably adjustable relative to the strike housing and is securable at the time of installation to align with the center of the latch bolt. The ramp element has a channel to allow entry and exit of a latch bolt having a dead latch. A keeper engages the dead latch and maintains it in a retracted position when the closure is locked and is released when the electric latch solenoid is energized. A travel limiting foot limits rotation of the keeper so that the latch bolt may transition from the keeper to the ramp element without interference.

Abstract: An electric strike which provides vertical adjustability of the position of the strike relative to the latch bolt in the closure with modification to the doorframe on the dust box. A ramp element in the strike housing is adjustable relative to the strike and is securable at the time of installation to align the center of the latch bolt and strike. The ramp element has a channel to allow entry and exit of a latch bolt having a dead latch. A keeper engages the dead latch and maintains it in a retracted position when the closure is locked and is released when the electric latch solenoid is energized.

Abstract: A surface mounted electric strike for use with an exit device such as a rim panic exit device. The electric strike has a housing with at least one keeper pivotally mounted to the housing. Each keeper has an associated cam with a detent. Release pawls engage detents on the cam in the locked position. A solenoid-operated unlock bar has stops, the position of which establishes whether the keepers are in a locked or unlocked position. The electric strike can be installed in either a fail safe or fail secure mode by locating the stops when the solenoid is de-energized in either a position which blocks or releases the release pawls. Other arrangements for establishing a selected operational mode include use of dual solenoids, use of dual locking bars and reversible release pawls.

Abstract: A system for operating an electric door release having an actuator powered by an energy harvester. The actuator may be a piezoelectric actuator and the harvester may be a piezo harvester. The system may further include a power module, a rechargeable battery and a voltage boost circuit disposed between the energy harvester and the actuator. When a piezoelectric actuator is used, a recycle actuator discharge circuit may be disposed between the piezoelectric actuator and the power module battery for recapturing a portion of the energy delivered to the piezoelectric actuator. The piezoelectric harvester may include an energy input portion whereby the piezo electric harvester is excited by the energy input portion. The energy input portion may include a circular or linear driving gear for exciting the piezoelectric harvester or a stepper motor generator, driven by movement of a door. The harvester may also be a stepper motor/generator.

Abstract: A system and method for processing a request by a first control service using a first control specification language, and a second control service using a second control specification language includes steps of: receiving the request from a requestor; providing the request to the first and second control services; receiving a decision on the request from each of the first and second control services; and comparing the decisions. The first control specification language is an access control policy.

Abstract: An optical data receiver comprises an optical input for receiving optical data signals, an optical sputter for splitting the optical signals into first and second receiver arms, an optical filter in the first receiver arm, means for increasing an intensity ratio of optical signal strength in the first receiver arm to optical signal strength in the second receiver arm, means for adjusting a phase difference between the first and second receiver arms, and an optical coupler for coupling outputs of the first and second receiver arms to a photodetector. The receiver of the present invention selectively filters a carrier component of received optical data signals, adjusts the relative strength of the carrier component and the received signal and then recombines them. In this way efficient optical transmission can be achieved with direct detection at the receiver, without the need for a complex receiver design including a local oscillator.

Abstract: An electric lock for remote access control to a container wherein a U-shaped latch is mounted on a door in alignment with a slot in a housing mounted in the container. Upon closure, the latch enters the housing to engage a slotted keeper therein and causes rotation of the keeper. Rotation of the keeper causes a release lever to engage a stepped protrusion on the keeper and secures the keeper and latch. Activation of a solenoid or drive motor coupled to the release lever permits withdrawal of the latch from the housing. The axes of rotation of the keeper and release lever are located to greatly reduce the impact of pre-release forces to the door.

Abstract: An electric lock for remote access control to a container wherein a U-shaped latch is mounted on a door in alignment with a slot in a housing mounted in the container. Upon closure, the latch enters the housing to engage a slotted keeper therein and causes rotation of the keeper. Rotation of the keeper causes a release lever to engage a stepped protrusion on the keeper and secures the keeper and latch. Activation of a solenoid or drive motor coupled to the release lever permits withdrawal of the latch from the housing. The axes of rotation of the keeper and release lever are located to greatly reduce the impact of pre-release forces to the door.

Abstract: A device and method for depolarising the total field of a wavelength division multiplexed (WDM) signal is provided. A polarisation maintaining multiplexor combines a plurality of optical signals to form a polarised multiplexed signal. The multiplexed signal is then passed through a differential group delay (DGD) element adapted to modify the polarisation state of one or more optical source signals within the multiplexed signal and thereby to at least partially depolarise the multiplexed signal.

Abstract: A feedforward controller for controlling the polarization state of an optical signal. The feedforward controller includes an optical input for receiving an optical input signal having an input polarization state, an optical output for transmitting an optical output signal having an output polarization state, a polarization controller coupled to the optical input and the optical output, and a transfer function determiner for determining a characteristic polarization transfer function of the feedforward controller from the input and output polarization states. The polarization controller is adapted to modify the polarization state of light passing therethrough in dependence on the characteristic polarization transfer function of the feedforward controller.

Abstract: A method, apparatus, and computer program product are provided for optimizing the pulse shape of optical signals output from an optical transmitter. The optical transmitter includes an optical modulator controlled by a bias voltage and a signal drive level, wherein the bias voltage and signal drive level are controlled automatically in a systematic way in dependence on one another to adapt the pulse shape of an optical output signal for optimal transmission over a transmission line.

Abstract: To fold sheets of newsprint (1), a ring gear 7 is driven in rotation by a motor 11 under the control of a controller 12 such that, for most of the time, the ring gear 7 rotates at the same speed as a folding cylinder 2 and arms 8. When it is desired to initiate a folding operation, the ring gear 7 is momentarily stopped or slowed. The relative motion that occurs between the ring gear 7 and planet gears on the arms 8 causes the planet gears 9 to rotate about their axes and respective tucking blades 6 mounted on the planet gears 9 to protrude above the surface of the cylinder 2, where they engage collated sheets on the cylinder surface and push them into the nip of folding rollers (4). Upon completion of the movement of the planet gears 9 and associated tucking blades 6, the ring gear 7 is again caused to move at the same angular speed as the arms 8, such that the tucking blades 6 retain their “silenced” positions below the surface of the cylinder 2.