Abstract: A virtual image generation system comprises a planar optical waveguide having opposing first and second faces, an in-coupling (IC) element configured for optically coupling a collimated light beam from an image projection assembly into the planar optical waveguide as an in-coupled light beam, a first orthogonal pupil expansion (OPE) element associated with the first face of the planar optical waveguide for splitting the in-coupled light beam into a first set of orthogonal light beamlets, a second orthogonal pupil expansion (OPE) element associated with the second face of the planar optical waveguide for splitting the in-coupled light beam into a second set of orthogonal light beamlets, and an exit pupil expansion (EPE) element associated with the planar optical waveguide for splitting the first and second sets of orthogonal light beamlets into an array of out-coupled light beamlets that exit the planar optical waveguide.

Abstract: A virtual image generation system comprises a planar optical waveguide having opposing first and second faces, an in-coupling (IC) element configured for optically coupling a collimated light beam from an image projection assembly into the planar optical waveguide as an in-coupled light beam, a first orthogonal pupil expansion (OPE) element associated with the first face of the planar optical waveguide for splitting the in-coupled light beam into a first set of orthogonal light beamlets, a second orthogonal pupil expansion (OPE) element associated with the second face of the planar optical waveguide for splitting the in-coupled light beam into a second set of orthogonal light beamlets, and an exit pupil expansion (EPE) element associated with the planar optical waveguide for splitting the first and second sets of orthogonal light beamlets into an array of out-coupled light beamlets that exit the planar optical waveguide.

Abstract: A portable actuator and safety switch assembly wherein the portable actuator includes a housing and an actuator for selectively engaging with a control mechanism of said safety switch. The actuator is at least one of partially located within the housing, forms a part of the housing, or is attached to the housing. The assembly includes a controller that controls a configuration of the actuator assembly, such that the actuator assembly can selectively and controllably attain a first configuration wherein the actuator is able to interact with the control mechanism of the safety switch and a second configuration wherein the actuator is unable to manipulate the control mechanism of said safety switch.

Abstract: The provision of emergency response services to a user can be based on transitioning a communications device associated with a user to a listening mode, setting a first timer, recording user actions with the communications device, ascertaining, based on a status of the first timer and the user actions, whether a criteria with respect to at least user interaction is met, and, if the criteria is met, transitioning the communications device to an emergency communications mode, else resetting the timer and repeating the recording and the ascertaining until the criteria is met. The emergency communication mode consists of forwarding user and live location information to a remote server and receiving emergency contact information, selected based on the user and live location information, for establishing a communication with emergency response personnel.

Abstract: The provision of emergency response services to a user can be based on transitioning a communications device associated with a user to a listening mode, setting a first timer, recording user actions with the communications device, ascertaining, based on a status of the first timer and the user actions, whether a criteria with respect to at least user interaction is met, and, if the criteria is met, transitioning the communications device to an emergency communications mode, else resetting the timer and repeating the recording and the ascertaining until the criteria is met. The emergency communication mode consists of forwarding user and live location information to a remote server and receiving emergency contact information, selected based on the user and live location information, for establishing a communication with emergency response personnel.

Abstract: A disc brake testing apparatus comprises operating means operable to operate pad moving means of the disc brake to urge pads of the brake towards the disc thereof. The operating means operable to urge the pads against the disc with a higher pressure sufficient to cause the pads to maintain constant contact with the disc and apply a significant braking force thereto. In order to simulate conditions which cause disc thickness variation, the operating means is alternatively operable to urge the pads against the disc with a lower pressure selected to cause the pads to make intermittent contact with the disc during each revolution of the disc.