Abstract A pre-set electronic cash register in which a magnetic core matrix is utilized for price, inventory and cash total memory, and for temporary storage of quantity, tax and total for individual transactions. Each item for sale in a given transaction is represented by a separate item key which, together with a quantity key, has an input to the core memory. The price for each individual item is stored in the corresponding item in memory. This is addressed with an item key and a quantity key for each transaction and read out into a shift register through suitable core timing circuitry. The shift register is parallely connected to an accumulator which, when the item priced and quantity or multiplier has been shifted out of the shift register, contains the product. The tax rate is accomplished through a binary number representing the tax rate times 200 which is multiplied by the total and divided by 200 after which it is added to the sum of the product''s item and quantity. An updated inventory is coupled back to the core memory system after each transaction. When the transaction is completed, printer-control circuitry activates a printer which itemizes the transaction and prints out the tax and total. Inventory keys are provided for printing out the existing inventory stored in the memory core. Suitable circuitry is provided for changing item prices and tax rates. The minimum tax rate is programmed through a BCD to binary converter into a subtractor for comparing an individual transaction with a minimal tax rate and inhibits the tax circuitry when the transaction is below the minimum taxable purchase.
A pre-set electronic cash register comprising: a memory matrix, said memory matrix having a plurality of prices programmed therein, each price representing a separate item; a quantity read-in means coupled to said memory matrix for reading in quantities of said items; readout means coupled to said memory matrix for serially reading out each price and quantity from said memory matrix; a shift register coupled to said readout means for storing said quantity and price readouts serially; an accumulator coupled in parallel to said shift register for accumulating the product of the quantity and price in said shift register; a readout means; and coupling means coupling said readout means to an output of said accumulator.
Claim 2
Dependent Claim
114 words
A pre-set electronic cash register comprising: a memory matrix, said memory matrix having a plurality of prices programmed therein, each price representing a separate item; a quantity read-in means coupled to said memory matrix for reading in quantities of said items; readout means coupled to said memory matrix for serially reading out each price and quantity from said memory matrix; a shift register coupled to said readout means for storing said quantity and price readouts serially; an accumulator coupled in parallel to said shift register for accumulating the product of the quantity and price in said shift register; a readout means; and coupling means coupling said readout means to an output of said accumulator.
Claim 3
Dependent Claim
27 words
The pre-set electronic cash register of claim 1 and further including: tax computing means coupled to said shift register for computing the sales tax on each transaction.
Claim 4
Dependent Claim
48 words
The pre-set electronic cash register of claim 1 and further including: tax computing means coupled to said shift register for computing the sales tax on each transaction; and inhibiting means coupled to said tax computing means for inhibiting any tax computation on purchases below the minimum taxable purchase.
Claim 5
Dependent Claim
23 words
The pre-set electronic cash register of claim 3 and further including: programing means for programing the minimum taxable purchase into said inhibit means.
Claim 6
Dependent Claim
26 words
The pre-set electronic cash register of claim 1 and further including: price change means for programing a price change of any item into said memory matrix.
Claim 7
Dependent Claim
57 words
The pre-set electronic cash register of claim 1 wherein: said memory matrix includes a plurality of item rows for storing the price of each item, the current inventory and the quantity of each transaction serially; and further including an additional row for storing total purchase price and tax; and a further additional row for storing cash receipts.