Abstract: A paper shredder is configured like a conventional paper shredder except that the shredding mechanism is located in a removable cartridge. This allows a single paper shredder housing to be rapidly converted from one shredding pattern to another by simply changing the shredding cartridge. Furthermore, shredding cartridges can be readily replaced whenever the shredding mechanism jams or fails in some other manner. This simplifies repair and servicing of the paper shredder.

Abstract: The present invention relates generally to shredder openings or throats. Specifically, this invention teaches a shredder housing with a top throat to allow material to be disposed of from above the shredder, as well as a side throat to allow for material to be disposed of from the side of the shredder. This is accomplished by placing a guiding member in the throat to assist both the top and side input. In addition, two side throats substantially opposite each other allow for multiple users to simultaneously use the shredder. Finally, the guiding member can serve as a handle to assist in lifting the housing from the base.

Abstract: The present invention discloses a shredder base capable of collapsing into one flat piece in order to reduce the amount of space occupied when shipping or storing the shredder base. A shredder base having features of the present invention comprises four side walls with reinforcing members located at each upper corner of the shredder base. Each reinforcing members has a hinge which allows for the base to collapse and fold onto itself. The bottom wall of the shredder base has two upper support flaps and a lower folding bottom wall. In other preferred embodiments, a base frame is comprised of legs which are attached to a shredder housing support frame via hinges. The legs may also be connected to a bottom support for increased stability.

Abstract: The present invention relates generally to shredder openings or throats. Specifically, this invention teaches a shredder housing with a top throat to allow material to be disposed of from above the shredder, as well as a side throat to allow for material to be disposed of from the side of the shredder. This is accomplished by placing a guiding member in the throat to assist both the top and side input. In addition, two side throats substantially opposite each other allow for multiple users to simultaneously use the shredder. Finally, the guiding member can serve as a handle to assist in lifting the housing from the base.

Abstract: A programmable precise frequency divider cooperating with a low frequency crystal and an oscillating circuit is disclosed. The divider includes a low frequency oscillating circuit, a preset code memory, a programmable preset code loader, an adder, and a register. The programmable preset code loader loads and latches a preset code either from the preset code memory or a preset code input line coupled to an external data source. The latched preset code and the current value of the register are commonly supplied to the adder. The adder is used to sum up the latched preset code from the programmable preset code loader and the current value from the register and thereby supply a resultant value to the register. The register accumulates the resultant value from the adder to the oscillating signal from the oscillating circuit and then supplies a output clock signal with a required divided frequency.

Abstract: A method and an interface circuit for scanning keys and external resistors of a keypad are disclosed.

Abstract: A method and apparatus for improved scanning keyboard and diodes option is disclosed. Each of the pins is treated as one independent dimension so as to define a multi-dimensional configuration. The circuit includes a clock generation circuit, a keyboard I/O port device comprising a plurality of ports associated with the pins and a key detection register device. A key is arranged at the interconnection of any two ports. When the key is depressed, by maintaining the ports at a first level and applying a second level to each of the ports to check which port goes from the first level to the second level, the location of the key may be determined. The output of the ports are stored in the key detection register device for the determination of the key location.

Abstract: A voice-dialing device without additional power supply can generate articulate voice signal upon dialing; such device can provide a function of voice dialing, and a function of confirming the dialing. In dialing operation, the device can provide a correct dialing by using the voice dialing as an auxiliary means; after dialing, a user can confirm the number dialed so as to ensure a user to control the dialing operation and the correctness of a number dialed.

Abstract: A compound type keyboard detector is disclosed. It comprises a time-sequencing generator, a keyboard scanner, a column input port and a row input port, a column lock and a row lock, a keyboard-synchronization detector, a keyboard detector and a keyboard decoder. With the unique design of the keyboard detector in conjunction with the various circuits that are associated therewith, a given number of pins can be used for a relatively greater number of input keys, or a smaller number of pins can be used for relatively complicated input keyw. This type of keyboard detector is good for small IC products, and can reduce the manufacturing cost thereof.

Abstract: A digital-to-analog converter includes a generator responsive to a digital input signal, a set of switches each being directly connected to the generator, and a first and a second terminals connecting therebetween a resistor device having a plurality of nodes directly connected to the switches in order that a node voltage can be obtained between one of the nodes and one of the terminals to serve as an analog signal. Such converter has a low distortion/noise and can be used in a broad source voltage scope.