Abstract: An optical stack for sensing a presence of an analyte is provided. The optical stack includes a sensor material. The sensor material includes a first optical response including a first optical property having a second value in response to an excitation signal including the first optical property having a first value different from the second value. The first optical response includes a second optical property sensitive to the presence of the analyte. The optical stack includes a first optical film disposed proximate the sensor material and includes a third optical property having respective third and fourth values in response to the respective first and second values of the first optical property. The third value is different from the fourth value by at least a factor of 2.

Abstract: An adjustable width headache rack capable of accommodating the widths of multiple pick-up truck vehicles and mounting thereon including a frame member having an upper load bar and a lower cross bar each extending between two upright members spaced a distance from one another. Leg members extend from each upright member in a rearward direction on top of bed rails of the pick-up truck. The leg members have a sleeve portion which slidingly engages the lower cross bar thereby enabling width adjustment. Screen members are interchangeable within the truck rack frame.

Abstract: An adjustable width headache rack capable of accommodating the widths of multiple pick-up truck vehicles and mounting thereon including a frame member having an upper load bar and a lower cross bar each extending between two upright members spaced a distance from one another. Leg members extend from each upright member in a rearward direction on top of bed rails of the pick-up truck. The leg members have a sleeve portion which slidingly engages the lower cross bar thereby enabling width adjustment. Screen members are interchangeable within the truck rack frame.

Abstract: An on-edge stacker having a deck surface to support a vertical mail stack, which is allowed to expand from the upstream end to the downstream end. A paddle, movably mounted on a linear support member, is used to support the downstream end of the mail stack. The linear support member is positioned at a level lower than or substantially the same as the deck surface so that the mail can be swept from the deck surface from either longitudinal side of the stacker. A toggle switch is disposed near the downstream end so that when the paddle moved by the expanding stack reaches beyond a certain point, the toggle switch is triggered to indicate that the stack is full or almost full. The paddle has a wedge-shaped blade so that it can slide the stacked mailed on the deck surface without damaging the mail.

Abstract: An on-edge stacker having a deck surface to support a vertical mail stack, which is allowed to expand from the upstream end to the downstream end. A paddle, movably mounted on a linear support member, is used to support the downstream end of the mail stack. The linear support member is positioned at a level lower than or substantially the same as the deck surface so that the mail can be swept from the deck surface from either longitudinal side of the stacker. A toggle switch is disposed near the downstream end so that when the paddle moved by the expanding stack reaches beyond a certain point, the toggle switch is triggered to indicate that the stack is full or almost full. The paddle has a wedge-shaped blade so that it can slide the stacked mailed on the deck surface without damaging the mail.

Abstract: A method of joining a first sheet-metal member to a second sheet-metal member in a right-angle relationship using an H-shaped interlocking member. An opening is provided near an edge of the second sheet metal member with a channel communicating the opening and the edge. The opening is sufficiently wide to allow the H-shaped member to be rotated therein so as to allow the upper and lower slots of the H-shaped member to engage with the second sheet-metal member. A tapped hole is provided in the center section of the H-shaped member, aligned with the channel, so as to allow a screw to be inserted through a hole on the first sheet-metal member and then the channel to engage with the tapped hole. After the screw is tightened, the surface of the first sheet metal member is securely joined to the edge of the second sheet metal member.

Abstract: A method of joining a first sheet-metal member to a second sheet-metal member in a right-angle relationship using an H-shaped interlocking member. An opening is provided near an edge of the second sheet metal member with a channel communicating the opening and the edge. The opening is sufficiently wide to allow the H-shaped member to be rotated therein so as to allow the upper and lower slots of the H-shaped member to engage with the second sheet-metal member. A tapped hole is provided in the center section of the H-shaped member, aligned with the channel, so as to allow a screw to be inserted through a hole on the first sheet-metal member and then the channel to engage with the tapped hole. After the screw is tightened, the surface of the first sheet metal member is securely joined to the edge of the second sheet metal member.

Abstract: An apparatus for changing the direction of travel of a flat article being conveyed seriatim along a paper path without changing the orientation of the flat article with respect to a first direction of travel. The apparatus includes a deck having an upstream end for receiving a flat article being conveyed along a paper path in a first direction and a registration wall upstanding on the deck and spaced from the upstream end, the registration wall having a longitudinal axis defining a second direction that is substantially orthogonal to the first direction. A drive assembly is operatively coupled to the deck in proximity to the registration wall and is operative to seize a first leading edge of a flat article traveling in the first direction on the deck and convey the flat article in the second direction such that the leading edge of the flat article abuts against the registration wall.