US3622768A — Dual key depression for decimal position selection

Claim 1

Independent Claim 66 words

In a calculating machine having a plural-position register for storing data, the improvement comprising a. a plurality of data entry keys, b. storage means for radix point information, and c. means responsive to concurrent depression of at least two of said keys to store in said radix point storage means information defining the radix point location and being determined by at least one of said keys.

Claim 2

Dependent Claim 66 words

In a calculating machine having a plural-position register for storing data, the improvement comprising a. a plurality of data entry keys, b. storage means for radix point information, and c. means responsive to concurrent depression of at least two of said keys to store in said radix point storage means information defining the radix point location and being determined by at least one of said keys.

Claim 3

Dependent Claim 44 words

A calculating machine as defined in claim 1, wherein said data entry keys comprise a keyboard having value keys and a special key, and said storing means are responsive to concurrent depression of said special key and at least one of said value keys.

Claim 4

Dependent Claim 46 words

A calculating machine as defined in claim 2 and further including means for sensing said radix point information, and means for entering data in said plural-position storage register at positions controlled by said radix point information sensing means in response to operation of said value keys.

Claim 5

Dependent Claim 37 words

A fixed radix point calculating machine as defined in claim 3, wherein said value keys are decimal digit keys and said radix point location information stored is related to the decimal value of the digit key depressed.

Claim 6

Dependent Claim 31 words

A fixed decimal point calculating machine as defined in claim 4, wherein said digit key depressed has the value ''''0'''' and said decimal point location information corresponds to the value ''''10.''''

Claim 7

Dependent Claim 33 words

A calculating machine as defined in claim 2, wherein said special key is a clear key and including means responsive to depression of said clear key to clear the contents of said register.

Claim 8

Dependent Claim 52 words

A calculating machine as defined in claim 6, together with at least one other plural-position storage register, depression of said clear key alone causing clearance of said first-mentioned register and depression of said clear key concurrently with depression of one of said digit keys additionally causing clearance of said other storage registers.

Claim 9

Dependent Claim 51 words

A calculating machine as defined in claim 2, wherein said special key is depressed concurrently with depression of at least two of said plurality of value keys and said means responsive to concurrent depression of said keys stores information related to a combination of the values of said depressed value keys.

Claim 10

Dependent Claim 33 words

A calculating machine as defined in claim 8, wherein said special key is a clear key and including means responsive to depression of said clear key to clear the contents of said register.

Claim 11

Dependent Claim 61 words

A calculating machine as defined in claim 2, wherein said machine is operable by a normally disabled source of power, together with means enabling said source of power; and further including means responsive to said enabling of said source of power and operable to cause said concurrent depression responsive means to store a predetermined value in said radix point storage means.

Claim 12

Dependent Claim 47 words

A calculating machine as defined in claim 10, wherein said enabling means is a switch settable to a power-on position, and said concurrent depression responsive means stores a ''''2'''' in said radix point storage means in response to the setting of said switch to said power-on position.

Claim 13

Dependent Claim 46 words

A calculating machine as defined in claim 1, and further including a device having a plurality of positions for displaying data from said register, and means to display a radix point at one of said display positions under the control of said stored radix point information.

Claim 14

Dependent Claim 44 words

A calculating machine as defined in claim 12, wherein said data entry keys comprise a keyboard having value keys and a special key, and said storing means are responsive to concurrent depression of said special key and at least one of said value keys.

Claim 15

Dependent Claim 34 words

A calculating machine as defined in claim 13, wherein saId value keys are decimal digit keys and said radix point location information stored is related to the decimal value of the digit key depressed.

Claim 16

Dependent Claim 33 words

A calculating machine as defined in claim 13, wherein said special key is a clear key and including means responsive to depression of said clear key to clear the contents of said register.

Claim 17

Dependent Claim 52 words

A calculating machine as defined in claim 15, together with at least one other plural-position storage register, depression of said clear key alone causing clearance of said first-mentioned register and depression of said clear key concurrently with depression of one of said value keys additionally causing clearance of said other storage registers.

Claim 18

Dependent Claim 51 words

A calculating machine as defined in claim 13, wherein said special key is depressed concurrently with depression of at least two of said plurality of value keys and said means responsive to concurrent depression of said keys stores information related to a combination of the values of said depressed value keys.

Claim 19

Dependent Claim 93 words

In a calculating machine having a keyboard, including value keys for data entry, a plural-position register for storing data, and a device displaying the contents of said register, the improvement comprising a. a special key on the keyboard, and b. means to display the location of a radix point with respect to said contents, said radix point display means being responsive to concurrent depression of said special key and at least one of said value keys to display said radix point at a location related to the value of said depressed value key.

Claim 20

Dependent Claim 93 words

In a calculating machine having a keyboard, including value keys for data entry, a plural-position register for storing data, and a device displaying the contents of said register, the improvement comprising a. a special key on the keyboard, and b. means to display the location of a radix point with respect to said contents, said radix point display means being responsive to concurrent depression of said special key and at least one of said value keys to display said radix point at a location related to the value of said depressed value key.

Claim 21

Dependent Claim 33 words

A calculating machine as defined in claim 18, wherein said value keys are decimal digit keys and said radix point display location is related to the decimal value of the digit key depressed.

Claim 22

Dependent Claim 53 words

A calculating machine as defined in claim 19, wherein said register and said display each have at least ten positions, said digit key concurrently depressed has the value ''''0'''' and said decimal point display means in response to said concurrent depression displays a decimal point to the left of said tenth display position.

Claim 23

Dependent Claim 33 words

A calculating machine as defined in claim 19, wherein said special key is a clear key and including means responsive to depression of said clear key to clear the contents of said register.

Claim 24

Dependent Claim 45 words

A calculating machine as defined in claim 21, further including means for storing radix point location information in response to said concurrent depression and means for sensing said stored radix point information, and wherein said radix point display means are controlled by said sensing means.

Claim 25

Dependent Claim 87 words

A calculating machine as in claim 22, and further including means responsive to depression of said clear key to display zeros representing the contents of said cleared register, and to display a decimal point at a location under control of said radix point location information, and responsive to the concurrent depression of said clear key and at least one said digit key to display zeros representing the contents of said cleared register and a decimal point at a location determined by the value of said digit key.

Claim 26

Dependent Claim 45 words

A calculating machine as defined in claim 18, further including means for storing radix point location information in response to said concurrent depression and means for sensing said stored radix point information, and wherein said radix point display means are controlled by said sensing means.

Claim 27

Dependent Claim 44 words

A calculating machine as defined in claim 24, further including means for entering data in said plural-position storage register at positions controlled by said sensing means in response to operation of said value keys in the absence of concurrent operation of said special key.

Claim 28

Dependent Claim 61 words

A calculating machine as defined in claim 18, wherein said machine is operable by a normally disabled source of power, together with means enabling said source of power; and further including means responsive to said enabling of said source of power and operable to cause said concurrent depression Responsive means to store a predetermined value in said radix point storage means.

Claim 29

Dependent Claim 47 words

A calculating machine as defined in claim 26, wherein said enabling means is a switch settable to a power-on position, and said concurrent depression responsive means stores a ''''2'''' in said radix point storage means in response to the setting of said switch to said power-on position.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1974-11-22	1975-05-24	1975-11-23	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1978-11-22	1979-05-24	1979-11-23	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1982-11-22	1983-05-24	1983-11-23	$7700.00	Window Closed / Lapsed

Dual key depression for decimal position selection

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