Abstract: A tray table indicator includes a channel, a cover, and a magnetic ball. The channel has a first extension, a curve, and a second extension, and the cover encloses the channel. A magnetic ball is contained within the channel and is movable from the first extension around the curve to the second extension of the channel in response to rotation of the rotating tray table component by a minimum distance in a first direction. The curve of the channel is configured to prevent gravity from returning the magnetic ball to the first extension from the second extension in response to rotation of the rotating tray table component in a second direction after having rotated the minimum distance in the first direction.

Abstract: An imaging system comprising a parabolic reflector having a base and defining a first axis, a light source disposed proximate the base essentially along the first axis, an imaging device comprising a zooming lens having a second axis, the imaging device being disposed in front of the light source along the first axis such that the second axis and the first axis are essentially coincident.

Abstract: A spring capture assembly is provided for securing a compression spring of a spring-biased mechanism, such as a spring-biased pressure relief valve, to permit disassembly of the mechanism without risk of damage or injury associate with rapid resiling of the spring from a compressed state. The assembly includes a tool, a housing having an opening for admitting passage of the tool and capturing the spring at one end, a spring retainer, and a compression spring mounted within the housing and captured at one end by said housing and toward an opposite end by the spring retainer. The tool is adapted for mating with the spring retainer and the housing to compress the spring therebetween. The spring capture assembly may be incorporated into a pressure relief valve for venting pressure and/or vacuum from a pressure vessel. Provided also is a method for disassembling a spring-biased mechanism including a spring capture assembly.

Abstract: A spring capture assembly is provided for securing a compression spring of a spring-biased mechanism, such as a spring-biased pressure relief valve, to permit disassembly of the mechanism without risk of damage or injury associate with rapid resiling of the spring from a compressed state. The assembly includes a tool, a housing having an opening for admitting passage of the tool and capturing the spring at one end, a spring retainer, and a compression spring mounted within the housing and captured at one end by said housing and toward an opposite end by the spring retainer. The tool is adapted for mating with the spring retainer and the housing to compress the spring therebetween. The spring capture assembly may be incorporated into a pressure relief valve for venting pressure and/or vacuum from a pressure vessel. Provided also is a method for disassembling a spring-biased mechanism including a spring capture assembly.

Abstract: An imaging system comprising a parabolic reflector having a base and defining a first axis, a light source disposed proximate the base essentially along the first axis, an imaging device comprising a zooming lens having a second axis, the imaging device being disposed in front of the light source along the first axis such that the second axis and the first axis are essentially coincident.

Abstract: A valve includes a housing configured to interengage with a container, a first and second poppets axially movable between open and closed positions, a first seal between the first poppet and the housing, a second seal between the first poppet and the second poppet, and first and second resilient members disposed within the housing and urging the first and second poppets toward the closed position.

Abstract: An imaging system comprising a parabolic reflector having a base and defining a first axis, a light source disposed proximate the base essentially along the first axis, an imaging device comprising a zooming lens having a second axis, the imaging device being disposed in front of the light source along the first axis such that the second axis and the first axis are essentially coincident.

Abstract: A camera head comprising: (a) housing having a front and back orientation and defining a cavity, the housing being cylindrical and having an axis, the housing having a rear portion for interengaging with a support system; (b) a first wall annularly configured in the housing; (c) a front portion in threaded engagement with the housing such that rotating the front portion causes it to move axially with respect to the housing, the front portion having a front face at least a portion of which is transparent, the front portion comprising a second wall being cylindrical and extending backward from the front face to define a center cavity, the first and second walls cooperating to define an annular cavity; (d) at least one lens attached to the second wall and disposed in the center cavity; (e) one or more light emitting devices disposed in the annular cavity and operatively connected to the housing; and (f) at least one imaging device disposed in the cavity operatively connected to the housing and optically coupled

Abstract: A spring capture assembly is provided for securing a compression spring of a spring-biased mechanism, such as a spring-biased pressure relief valve, to permit disassembly of the mechanism without risk of damage or injury associate with rapid resiling of the spring from a compressed state. The assembly includes a tool, a housing having an opening for admitting passage of the tool and capturing the spring at one end, a spring retainer, and a compression spring mounted within the housing and captured at one end by said housing and toward an opposite end by the spring retainer. The tool is adapted for mating with the spring retainer and the housing to compress the spring therebetween. The spring capture assembly may be incorporated into a pressure relief valve for venting pressure and/or vacuum from a pressure vessel. Provided also is a method for disassembling a spring-biased mechanism including a spring capture assembly.

Abstract: An imaging system comprising a parabolic reflector having a base and defining a first axis, a light source disposed proximate the base essentially along the first axis, an imaging device comprising a zooming lens having a second axis, the imaging device being disposed in front of the light source along the first axis such that the second axis and the first axis are essentially coincident.

Abstract: A camera head comprising: (a) housing having a front and back orientation and defining a cavity, the housing being cylindrical and having an axis, the housing having a rear portion for interengaging with a support system; (b) a first wall annularly configured in the housing; (c) a front portion in threaded engagement with the housing such that rotating the front portion causes it to move axially with respect to the housing, the front portion having a front face at least a portion of which is transparent, the front portion comprising a second wall being cylindrical and extending backward from the front face to define a center cavity, the first and second walls cooperating to define an annular cavity; (d) at least one lens attached to the second wall and disposed in the center cavity; (e) one or more light emitting devices disposed in the annular cavity and operatively connected to the housing; and (f) at least one imaging device disposed in the cavity operatively connected to the housing and optically coupled

Abstract: In one embodiment, the valve comprises: (a) a housing configured to interengage with a container, and having at least one axis and at least one aperture; (b) a first poppet axially movably within said housing between a first closed position and a first open position; (c) a second poppet axially movable within said first poppet between a second closed position and a second open position; (d) a first seal between said first poppet and said housing; (e) a second seal between said first poppet and said second poppet; (f) a first resilient member disposed within a first space between said housing and said first poppet, and having a resilient force sufficient to hold said first poppet in said first closed position such that said first poppet urges said first seal against said housing when a pressure differential axially across said first poppet is below a first point, and to allow said first poppet to move in said first direction to said first open position when said fluid pressure differential exceeds said first p