Abstract: A vehicle presence detecting sensor (10) associated with a defined area, wherein, the sensor (10) comprises a microprocessor (100), and a first detecting module (11), a second detecting module (12), as well as a third module (13), respectively connected to and controlled by the microprocessor (100), wherein, the microprocessor (100) is configured for activating the second detecting module (12) when a change of magnetic field is detected by the first detecting module (11) or activating the third module (13) when the distance measured falls out of the predetermined distance range, and for confirming the presence of a vehicle by comparing the distance measured by the second detecting module (12) with a predetermined distance range, or by matching the value of the detailed change of magnetic field detected by the third module (13), with prestored values. Also, a method of the sensor (10) and a self enforcing pay-by-phone parking system using the sensor (10) are disclosed.

Abstract: A random access sheet receiver is provided with a stack of trays having ends vertically shiftably mounted in a frame structure and forming bins to receive sheets from a copier, printer, or the like, wherein said ends of the trays are normally closely spaced and rest one on the other. A sheet infeed is pivotally mounted in the frame structure to receive sheets exiting from the copier, printer, or the like, the infeed being associated with a bin opening mechanism which raises and lowers the infeed and has a lifter to pivotally open and hold open said ends of the trays during transport of a sheet to a selected bin. The other ends of the trays are supported on cams which increase the space at the other ends of the bins in response to pivotal opening of the trays by the bin opener.