Abstract: A wheelchair can comprise: a frame comprising an upper portion and a lower portion that is coupled to the upper portion so that the upper portion is vertically adjustable with respect to the lower portion. A pair of drive wheels can be coupled to the frame. A plurality (e.g., a pair) of casters are coupled to the frame. Each caster can have a respective swivel axis. At least one caster of the plurality of casters can be configured to be locked to prevent swiveling about its respective swivel axis and unlocked to enable swiveling about its respective swivel axis.

Abstract: A pleated filter media configured to receive a stream of fluid flowing in a first direction is provided. The pleated filter media includes a first filter media panel and a second filter media panel coupled to the first filter media panel at a first pleat extending in a second direction transverse to the first direction. The pleated filter media also includes a first embossment disposed on the first filter media panel and the second filter media panel. The first embossment extends in a third direction transverse to the first direction and the second direction.

Abstract: An image sensor is provided that includes a focal plane array; a cold shield having a top wall disposed over the focal plane array and defining an aperture operatively configured to be selectively switched between a first diameter and a second diameter that is larger than the first diameter; and a filter element disposed between the cold shield aperture and the focal plane array. The filter element includes a first band-pass filter and a second band-pass filter. The first band-pass filter is disposed directly beneath the cold shield aperture when the cold shield aperture is switched to the first diameter or the second diameter. The second band-pass filter is covered by the top wall of the cold shield when the cold shield aperture is switched to the first diameter and is disposed directly beneath the cold shield aperture when the cold shield aperture is switched to the second diameter.

Abstract: An image sensor is provided that includes a focal plane array; a cold shield having a top wall disposed over the focal plane array and defining an aperture operatively configured to be selectively switched between a first diameter and a second diameter that is larger than the first diameter; and a filter element disposed between the cold shield aperture and the focal plane array. The filter element includes a first band-pass filter and a second band-pass filter. The first band-pass filter is disposed directly beneath the cold shield aperture when the cold shield aperture is switched to the first diameter or the second diameter. The second band-pass filter is covered by the top wall of the cold shield when the cold shield aperture is switched to the first diameter and is disposed directly beneath the cold shield aperture when the cold shield aperture is switched to the second diameter.

Abstract: A vehicle theft prevention/security system having a concealed module capable of learning, and then recognizing the voice of the owner or authorized operator. The module controls (switches) the operation of a concealed relay that normally interrupts current to the starter solenoid or ignition system unless the owner or authorized operator speaks into a conveniently mounted microphone within the vehicle. The module may be programmed to recognize the voice of the owner or authorized user, regardless of the spoken word(s), or the module may be programmed to recognize only a certain password spoken only by a certain owner or authorized user. Once the module recognizes the owner or authorized user, the relay then switches to provide current to the previously interrupted ignition system or starter solenoid. The module provides audio output/feedback to the owner or authorized user during operation.