Input device

Claim 2

An input device adaptable in an electronic calculating machine for permiting such machine to function without error even when a plurality of character keys on the keyboard thereof are rolled over successively, which comprises a plurality of key contacts operatively associated with a corresponding number of character keys disposed on the keyboard of said machine, each of said key contacts including a first gate element having one input terminal connected with said key contact and the other input terminal connected with a timing pulse generator so that a corresponding one of a plurality of timing pulses generated by said timing pulse generator can be applied therethrough to said first gate element upon closure of the relevant key contact; a plurality of means for storing an input signal representative of the operation of any one of said character keys on the strength of one of the timing pulses associated with the operated character key in the event the input signal is applied thereto, the number of said storing means being associated with that of said character keys; first gate means having an input terminal adapted to receive outputs of said gate elements and the other input terminal adapted to receive outputs of said storing means, said first gate means being operable in response to one of said outputs of said storing means so as to supply the input signal representative of the operation of the relevant character key to each input terminal of said storing means; and second gate means having an input terminal adapted to receive outputs of said gate elements and the other input terminal adapted to receive, while said storing means generates its output, a timing pulse associated with the input signal that has been stored in said storing means, said second gate means being operable in response to the application of the timing pulse thereto so as to supply the input signal representative of the operation of the relevant character key to each input terminal of said storing means, whereby, in the event that the storing means does not generate the output signal, said first gate means is opened to supply the input signal representative of the initial operation of the key to said storing means and, in The event that the storing means generate the output signal to said first gate means, said first gate means is then closed to prevent the passage of said input signal therethrough during the application of the output signal from said storing means, but to permit said input signal to pass through said second gate means to said storing means, said first gate means being adapted to re-open to permit another input signal representative of the subsequent operation of a character key to pass therethrough to said storing means when the initially operated key is released.

Claim 3

An input device adaptable in an electronic calculating machine for permiting such machine to function without error even when a plurality of character keys on the keyboard thereof are rolled over successively, which comprises a plurality of key contacts operatively associated with a corresponding number of character keys disposed on the keyboard of said machine, each of said key contacts including a first gate element having one input terminal connected with said key contact and the other input terminal connected with a timing pulse generator so that a nal connected with a timing pulse generator so that a corresponding one of a plurality of timing pulses generated by said timing pulse generator can be applied therethrough to said first gate element upon closure of the relevant key contact; a plurality of means for storing an input signal representative of the operation of any one of said character keys on the strength of one of the timing pulses associated with the operated character key in the event the input signal is applied thereto, the number of said storing means being associated with that of said character keys; a first gate means having an input terminal adapted to receive outputs of said gate elements and the other input terminal adapted to receive outputs of said storing means, said first gate means being operable so as to close when said storing meang generates its output and to open after a lapse of certain time when said output of said storing means diminishes to supply the input signal representative of the operation of the relevant character key to each input terminal of said storing means; and a second gate means having an input terminal adapted to receive outputs of said gate elements and the other input terminal adapted to receive, while said storing means generates its output, a timing pulse associated with the input signal that has been stored in said storing means, said second gate means being operable in response to the application of the timing pulse thereto so as to supply the input signal representative of the operation of the relevant character key to each input terminal of said storing means, whereby, in the event that the storing means does not generate the output signal, said first gate means is opened to supply the input signal representative of the initial operation of the key to said storing means and, in the event that the storing means generate the output signal to said first gate means, said first gate means is then closed to prevent the passage of said input signal therethrough during the application of the output signal from said storing means, but to permit said input signal to pass through said second gate means to said storing means, said first gate means being adapted to re-open to permit another input signal representative of the subsequent operation of a character key to pass therethrough to said storing means after a certain period of time when the initially operated key is released.

Claim 4

An input device adaptable in an electronic calculating machine for permiting such machine to function without error even when a plurality of character keys on the keyboard thereof are rolled over successively, which comprises a plurality of key contacts operatively associated with a corresponding number of character keys disposed on the keyboard of said machine, each of said key contacts including a first gate element having one input terminal connected with said key contact and the other input terminal connected with a timing pulse generator so that a nal connected with a timing pulse generator so that a corresponding one of a plurality of timing pulses generated by said timing pulse generator can be applied therethrough to said first gate element upon closure of the relevant key contact; a plurality of means for storing an input signal representative of the operation of any one of said character keys on the strength of one of the timing pulses associated with the operated character key in the event the input signal is applied thereto, the number of said storing means being associated with that of said character keys; a first gate means having an input terminal adapted to receive outputs of said gate elements and the other input terminal adapted to receive outputs of said storing means, said first gate means being operable so as to close when said storing meang generates its output and to open after a lapse of certain time when said output of said storing means diminishes to supply the input signal representative of the operation of the relevant character key to each input terminal of said storing means; and a second gate means having an input terminal adapted to receive outputs of said gate elements and the other input terminal adapted to receive, while said storing means generates its output, a timing pulse associated with the input signal that has been stored in said storing means, said second gate means being operable in response to the application of the timing pulse thereto so as to supply the input signal representative of the operation of the relevant character key to each input terminal of said storing means, whereby, in the event that the storing means does not generate the output signal, said first gate means is opened to supply the input signal representative of the initial operation of the key to said storing means and, in the event that the storing means generate the output signal to said first gate means, said first gate means is then closed to prevent the passage of said input signal therethrough during the application of the output signal from said storing means, but to permit said input signal to pass through said second gate means to said storing means, said first gate means being adapted to re-open to permit another input signal representative of the subsequent operation of a character key to pass therethrough to said storing means after a certain period of time when the initially operated key is released.

Claim 5

An input device according to claim 2, wherein said first gate means includes an inverter capable of inverting the output signal from each of said storing means, a delay circuit adapted to delay a signal from said inverter, and an ''''and'''' gate element having one input terminal adapted to receive the input signal from said first gate elements and the other input terminal adapted to receive a delayed signal from said delay circuit.

Claim 6

An input device adaptable in an electronic calcUlating machine for permiting such machine to function without error even when a plurality of character keys on the keyboard thereof are rolled over successively, which comprises a plurality of key contacts operatively associated with a corresponding number of character keys disposed on the keyboard of said machine, each of said key contacts including an ''''and'''' gate element having one input terminal connected with said key contact and the other input terminal connected with a timing pulse generator so that a corresponding one of a plurality of timing pulses generated by said timing pulse generator can be applied therethrough to said ''''and'''' gate element upon closure of the relevant key contact; a first ''''or'''' gate element adapted to receive an output from a plurality of said ''''and'''' gate element; second and third ''''and'''' gate elements each having one input terminal adapted to receive an output from said first ''''or'''' gate element; a second ''''or'''' gate element adapted to receive outputs from said second and third ''''and'''' gate elements; a plurality of flip-flops adapted to receive an output from said second ''''or'''' gate element to treat an input signal, that has been fed thereto, on the strength of a relevant one of a plurality of the timing pulses associated with a character key that has been operated, the number of said flip-flops being associated with that of said key contacts; a plurality of fourth ''''and'''' gates associated with said flip-flops and each having an input terminal adapted to receive an output from the corresponding flip-flop and the other input terminal adapted to receive the corresponding timing pulse; a third ''''or'''' gate element adapted to receive each output from said flip-flops; an inverter adapted to receive an output from said third ''''or'''' gate; an additional flip-flop having one input terminal adapted to receive an output from said inverter and adapted to be set by a set pulse generated at the time of change-over of one calculation step; a fifth ''''and'''' gate having one input terminal adapted to receive the output from said inverter and the other input terminal adapted to receive an output from said additional flip-flop in a delayed relation with respect to the output from said inverter that has been applied to the first mentioned input terminal of said fifth ''''and'''' gate, an output terminal of said fifth ''''and'''' gate element being connected with the other input terminal of said third ''''and'''' gate so as to supply an output from said fifth ''''and'''' gate element to said third ''''and'''' gate; and a fourth ''''or'''' gate element having a plurality of input terminals adapted to receive respective outputs from said fourth ''''and'''' gate elements and one output terminal connected with the other input terminal of said second ''''and'''' gate element so as to supply an output from said fourth ''''or'''' gate element to said second ''''and'''' gate element.

Claim 7

An input device adaptable in an electronic calcUlating machine for permiting such machine to function without error even when a plurality of character keys on the keyboard thereof are rolled over successively, which comprises a plurality of key contacts operatively associated with a corresponding number of character keys disposed on the keyboard of said machine, each of said key contacts including an ''''and'''' gate element having one input terminal connected with said key contact and the other input terminal connected with a timing pulse generator so that a corresponding one of a plurality of timing pulses generated by said timing pulse generator can be applied therethrough to said ''''and'''' gate element upon closure of the relevant key contact; a first ''''or'''' gate element adapted to receive an output from a plurality of said ''''and'''' gate element; second and third ''''and'''' gate elements each having one input terminal adapted to receive an output from said first ''''or'''' gate element; a second ''''or'''' gate element adapted to receive outputs from said second and third ''''and'''' gate elements; a plurality of flip-flops adapted to receive an output from said second ''''or'''' gate element to treat an input signal, that has been fed thereto, on the strength of a relevant one of a plurality of the timing pulses associated with a character key that has been operated, the number of said flip-flops being associated with that of said key contacts; a plurality of fourth ''''and'''' gates associated with said flip-flops and each having an input terminal adapted to receive an output from the corresponding flip-flop and the other input terminal adapted to receive the corresponding timing pulse; a third ''''or'''' gate element adapted to receive each output from said flip-flops; an inverter adapted to receive an output from said third ''''or'''' gate; an additional flip-flop having one input terminal adapted to receive an output from said inverter and adapted to be set by a set pulse generated at the time of change-over of one calculation step; a fifth ''''and'''' gate having one input terminal adapted to receive the output from said inverter and the other input terminal adapted to receive an output from said additional flip-flop in a delayed relation with respect to the output from said inverter that has been applied to the first mentioned input terminal of said fifth ''''and'''' gate, an output terminal of said fifth ''''and'''' gate element being connected with the other input terminal of said third ''''and'''' gate so as to supply an output from said fifth ''''and'''' gate element to said third ''''and'''' gate; and a fourth ''''or'''' gate element having a plurality of input terminals adapted to receive respective outputs from said fourth ''''and'''' gate elements and one output terminal connected with the other input terminal of said second ''''and'''' gate element so as to supply an output from said fourth ''''or'''' gate element to said second ''''and'''' gate element.