摘要:
A printer (24) for printing upon a continuous web of print receivable media (18) is provided. The printer includes a print head (28) having a media drive assembly side and a media drive assembly for moving the media across the print head. The media drive assembly is disposed only on the media drive assembly side of the print head. The printer further includes a platen (30) disposed adjacent the print head and a controller (102) coupled to the print head, the media drive assembly, and the platen. The controller controls the printer during continuous printing and single sheet printing. During continuous printing, the media is moved in a downstream direction past the print head. During single sheet printing, the media is moved past the print head in an upstream direction one sheet at a time. Further, the printer may perform single sheet pull printing or single sheet push printing.
摘要:
A fused mechanical interlock in an electrical switching device precludes a fuse access door from being open when the switching device is energized. The fused mechanical interlock optionally cooperates with a plug interlock mechanism which prevents the switching device from being energized unless a plug is properly inserted in a receptacle.
摘要:
A fluid control valve has a valve member which, on closing creates a stagnation zone between the valve member and a surface within the valve. In the stagnation zone fluid pressure is greater than it is in an adjacent constriction zone. This causes the valve to close slowly, thereby reducing the likelihood that water hammer will occur on closure of the valve. The design of the valve member also reduces resonances which can cause annoying noises and premature wear. A flow restriction chamber further slows closure of the valve. The fluid control valve may be controlled by a conventional 3-way pilot valve. Preferably the fluid control valve is used with a pilot valve according to the invention having a rocker member which, on actuation, first closes an inlet valve member and then opens an outlet valve member. The pilot valve may be used in other situations where a 3-way valve is needed.
摘要:
A cam assembly for a single cam bow provides replaceable cable sheaves. By selecting different cable sheaves the draw length of the bow may be altered while the bow is strung. The draw length can be further fine tuned by providing differentially spaced positions for attaching either end of the bow string to the cam assembly. A bow equipped with a cam assembly according to the invention can have a draw length adjustable in fine increments over a range of several inches.
摘要:
A gaseous fuel analyzer having a flow through chamber equipped with sound producing means at one end and sound receiving means at the other for measuring an acoustic property of fuel flowing through the chamber and for numerically relating the acoustic property to the combustion character of the fuel.