摘要:
In a communications system, a host computer in a data center communicates with a multiplicity of electronic postage meters via telephone dial-up lines to conduct telemeter setting (TMS) transactions. Through the communications, the host computer may collect statistical data from each meter, and may impose a cumulative postage amount limit, a time limit and/or a piece limit on the meter. To ensure security and data integrity, the communicated data between the meters and the host computer is selectively encrypted and/or authenticated.
摘要:
A postage meter has a secure housing and a printing means and accounting register within the secure housing. Formed in the secure housing is postal lock. In the postal lock, a door is movable between first and second positions relative to a cavity. When the door is closed (in its first position) it renders the cavity inaccessible, and when the door is open (in its second position) it renders the cavity accessible. The door has a latch. The latch is spring-loaded so that it engages a latch feature in the cavity and holds the door closed. Pushing the latch the other way (against the spring) causes the latch to engage a pawl in the cavity, and the pawl tends to push the door open. A protruberance on the rear of the door engages a locking gear in the cavity. The locking gear allows separation of two halves of the meter housing, or holds the two halves together. If the locking gear is in the position that permits separating the halves, then the door cannot be closed because the gear abuts with the protruberance. Only if the gear is in the locked position is it possible to close the door fully. The door is set up to accommodate postal regulations of many countries, including countries requiring a key and lead seal, a paper seal, a lead seal by itself, or a lead seal and paper seal.
摘要:
A postage meter has a print rotor rotated by a motor and the motor is capable of being started and stopped under processor control. State variables are established within a nonvolatile memory. The rotor begins in its home position. When a mail piece such as a letter is detected by a letter sensor, the processor sets a state variable. At some point (either before loss of power, or after restoration of power) the postage value to be printed is booked into the accounting register. The rotor motor is started. At some point (either before loss of power, or after restoration of power) the rotor reaches its home position again. A state variable is cleared. In this way, it is possible, even after the loss and restoration of power, to distinguish between a rotor that is in its home position because it has not yet printed postage (but needs to do so) and a rotor that is in its home position because the printing of postage has been completed. Similarly it is possible, even after the loss and restoration of power, to distinguish between accounting registers that are quiescent because they have not yet had a postage amount booked, and registers that are quiescent because the booking of postage has been completed. The postage meter is thus quite unlikely to print postage that has not been booked, or book postage that does not get printed, even in the face of power losses at unpredictable times, and even in the absence of a large-capacity reserve power supply.
摘要:
A postage meter has a secure housing, an accounting register within the secure housing, and a print rotor the rotation of which defines a paper path. The rotor axle is formed of two halves, and within the two haves is a lengthwise cavity along which setting racks are capable of axial movement. The racks engage with print wheels at one end and are accessible to the main body of the postage meter at the other end. Each rack engages with its value wheel in a rack-and-pinion engagement. The axle halves are made of plastic and they snap together. The racks slide within grooves, and are held in place with pins. The axle has journal bearings and a thrust bearing defining its movement relative to the secure housing. A worm gear in the housing engages a worm wheel in the rotor to bring about rotation of the rotor for the printing of postage.
摘要:
A self-contained postage meter does not have a base separable from a main body. The single secure housing contains everything that would be in the main body of a prior art postage meter and everything that would be in a prior art meter base. Despite containing all these things, the single secure housing is small enough and light enough in weight to permit the entire meter to be readily transported to the post office for inspection or resetting. Within the single secure housing are the print rotor with value wheels, all the mechanisms for setting the print wheels, the descending and/or ascending register and associated microprocessor, and all the mechanisms for transport of the mail piece through the meter. Only a handful of controlled elements are required, chiefly a single inexpensive DC motor for franking and value wheel setting and a few electromagnets. Two one-way clutches are used so that rotation of the motor in one direction accomplishes a setting cycle for the value wheels and rotation of the motor in the other direction accomplishes a printing (franking) cycle.
摘要:
An optical trigger is provided for use in a postage meter having a planar paper path. A light source with controllable intensity is mounted above the paper path and shines toward the paper path. A light sensor mounted above the paper path detects the reflected light if any. A dark region is provided below the paper path. More power is supplied to the light source when the sensor detects some light. An actuator is coupled with the printing mechanism of the meter to actuate it for printing of postage. When light is reflected from a mail piece, a timer is started, and when the timer reaches its programmed interval the actuator is actuated. The interval is adjustable by a trimmer adjustment, and two preprogrammed intervals may be selected by a front-panel switch.
摘要:
A computer system for protecting memory comprising a processor having address outputs and executing a stored program, a memory having a control input, an address-decoder for providing a control signal to the control input of the memory in response to associated address outputs from the processor, and a window circuit. The window circuit comprises a range detector responsive to the address outputs for generating a range-detection signal indicative of an address from the processor being within a protected range, the protected range non-identical to the entirety of the space of addresses within the memory. Access to memory locations within the protected range is permitted only if a request signal is received from the processor. If the request signal is asserted for an unexpectedly long time an error condition is annunciated, for example the processor is reset.
摘要:
Disclosed is a circuit for controlling the load of an asynchronous motor (11), the circuit comprising two capacitors (19, 20), one of which (20) can be connected, by means of a switch (70), in parallel with the other (19). Control is provided by a current sensor (30) and a voltage sensor (40), whose signals (S.sub.1, S.sub.2) are compared by a comparator (25). Depending on the relative size of the signals (S.sub.1, S.sub.2) a switch control unit (60) with relaxation hysteresis characteristics switches the switch (70) on or off. The circuit is simple, operates independently of the mains voltage (U) being used and its switch point can be adjusted by means of the current sensor (30).
摘要:
A date-setting method for use in a postage meter having date wheels includes the steps of setting the date wheels, printing a date on a mail piece, requesting an input indicating whether the date printed on the mail piece is correct, receiving a response in the negative, receiving information indicative of the date printed on the mail piece, resetting the date wheels, logging a record indicative of the negative response and the resetting action, printing another date on a mail piece, requesting an input indicating whether the date printed on the mail piece is correct, receiving a response in the negative, receiving information indicative of the date printed on the mail piece, resetting the date wheels, logging another record indicative of the negative response and the resetting action; and annunciating the records indicative of negative responses. Another date-setting method for use in a postage meter having date wheels capable of printing a date on a mail piece includes the steps of setting at least one date wheel, waiting until after the first time that postage has been printed on a mail piece subsequent to the setting of a date wheel, and thereafter, requesting an input indicating whether the date printed on the mail piece is correct.