Patent Document ID: 3996562
Application ID: 05390645
Patent Flag: 1

Claim One:
1. A program controlled electronic calculator comprising: manually operable selection means for selectively conditioning the calculator to operate either in a manually controlled calculating mode, a program storing mode, and an automatic program controlled calculating mode; control means for sequentially receiving algebraic operators; storage means for storing numerical operands and for storing a program of algebraic operators; a set of manually operable numeric keys for entering numerical operands into the storage means; a set of manually operable control keys for entering algebraic operators into the control means when the calculator is conditioned for operation in the manually controlled calculating mode and for entering algebraic operators into the storage means when the calculator is conditioned for operation in the program storing mode; transfer means for automatically sequentially transferring algebraic operators of a previously stored program from the storage means to the control means when the calculator is conditioned for operation in the automatic program controlled calculating mode; processing means for combining numerical operands stored in the storage means in accordance with the algebraic operators received by the control means when the calculator is conditioned for operation in either the manually controlled calculating mode or the automatic program controlled calculating mode, said processing means including logic means for delaying the combination of numerical operands in accordance with an algebraic operator received by the control means until at least one other algebraic operator has been entered into the control means; and output means for indicating the result of the numerical operands combined by the processing means in accordance with the algebraic operators received by the control means.