Automatic pushbutton dial system for a subscriber telephone

Claim 2

A keyboard dial system for a telephone set comprising: a. a digit processor having at least one set of input terminals and at least one set of latched output terminals and including: i. a programmed ROM containing a stored instruction set for controlling the operation of the dial system, ii. an arithmetic/logic unit for performing arithmetic and logic operations on data according to said stored instruction set, and iii. a memory means for temporarily storing data as such data is being processed by said digit processor; b. a keyboard array having a plurality of keys selectively coupled to at least one of said input terminals and to a plurality of said output terminals for entering coded information into said digit processor in dependence upon the state of said keys; and c. signal generator means coupled to at least one output terminal of said digit processor for generating dial signals corresponding to keyed in digits.

Claim 3

The keyboard dial system according to claim 1 wherein said signal generator means is a pulse responsive relay means for generating dial pulse signals.

Claim 4

A keyboard dial system for a telephone comprising: a. a keyboard array having 0-9 digit keys; b. an integrated circuit calculator system selctively coupled to said keyboard array for sensing coded information keyed in to said keyboard array, said calculator system including a first set of latched output means selectively coupled to said keyboard array for scanning said keyboard array and a second set of latched output means for generating coded output signals corresponding to digits keyed in to said keyboard array; and c. signal generator means coupled to said second set of latched output means for converting said coded output signals to dial signals; wherein d. said first and second sets of output means are independently latchable for generating said coded output signals to said signal generator means while said keyboard array is simultaneously being scanned and sensed.

Claim 5

A keyboard dial system for a telephone comprising: a. a keyboard array having 0-9 digit keys; b. an integrated circuit calculator system selctively coupled to said keyboard array for sensing coded information keyed in to said keyboard array, said calculator system including a first set of latched output means selectively coupled to said keyboard array for scanning said keyboard array and a second set of latched output means for generating coded output signals corresponding to digits keyed in to said keyboard array; and c. signal generator means coupled to said second set of latched output means for converting said coded output signals to dial signals; wherein d. said first and second sets of output means are independently latchable for generating said coded output signals to said signal generator means while said keyboard array is simultaneously being scanned and sensed.

Claim 6

The keyboard dial system according to claim 3 wherein said signal generator means is a pluse responsive relay means for generating dial pulse signals.

Claim 7

The keyboard dial system according to claim 3 wherein said coded output signals are generated at a rate consistent with the telephone exchange to which the telephone set is connected regardless of the speed at which the digits are keyed in to said keyboard array.

Claim 8

A keyboard dial system for a telephone comprising: a. a keyboard array having 0-9 digit keys; b. an integrated circuit calculator system selectively coupled to said keyboard array for sensing coded information keyed in to said keyboard array, said calculator system including a first set of latched output means selectively coupled to said keyboard array for scanning said keyboard array and a second set of latched output means for generating coded output signals corresponding to digits keyed in to said keyboard array; c. signal generator means coupled to said second set of latched output means for converting said coded output signals to dial signals; wherein d. said first and second sets of outputs means are idependently latchable for generating said coded output signals to said signal generator means while said keyboard array is simultaneously being scanned and sensed; e. a random access memory means having data input means selectively coupled to the second set of output means of said digit processor; f. data output means coupled to an input of said calculator system; and g. an address means selectively coupled to the first output means of said calculator system, said random access memory means for storing and retrieving a plurality of digit sequences corresponding to a repertoire of telephone numbers and said calculator system for generating addresses of said memory via said first set of latched output means.

Claim 9

A keyboard dial system for a telephone comprising: a. a keyboard array having 0-9 digit keys; b. an integrated circuit calculator system selectively coupled to said keyboard array for sensing coded information keyed in to said keyboard array, said calculator system including a first set of latched output means selectively coupled to said keyboard array for scanning said keyboard array and a second set of latched output means for generating coded output signals corresponding to digits keyed in to said keyboard array; c. signal generator means coupled to said second set of latched output means for converting said coded output signals to dial signals; wherein d. said first and second sets of outputs means are idependently latchable for generating said coded output signals to said signal generator means while said keyboard array is simultaneously being scanned and sensed; e. a random access memory means having data input means selectively coupled to the second set of output means of said digit processor; f. data output means coupled to an input of said calculator system; and g. an address means selectively coupled to the first output means of said calculator system, said random access memory means for storing and retrieving a plurality of digit sequences corresponding to a repertoire of telephone numbers and said calculator system for generating addresses of said memory via said first set of latched output means.