Patent US3725873A successfully refreshed from Google Patents.
US3725873A
Expired / Lapsed
US
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Calculator having a sequential access stack
Assignee: Singer Co
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Filing: 1971-04-07
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Granted: 1973-04-03
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Expires: 1991-04-07
Abstract
Abstract An electronic desk top calculator wherein digit data is entered into an entry register, and arithmetic and other control functions are initiated, by means of a keyboard, and wherein the entered data is stored in an automatic sequential access store. The entry register and at least one of the registers of the automatic sequential access store are displayed in superadjacent rows of juxtapositioned digits with like-order digits aligned column-by-column. Whenever new data is entered, any data previously contained in the entry register and the registers of the automatic sequential access store is shifted to the next higher order register in the store. Similarly, on the initiation of any function which removes the data from the entry register, or which combines the data in the entry register with the data in the next higher order register in the store as the result of a mathematical function, any data contained in the remaining registers of the store is shifted to the next lower order register of the store.
Inventors
- 👤 G Hare
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:28
CPC Classifications
G; G06; G06F; G06F15/00; G06F15/02
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
196 words
In an electronic calculator: a memory comprising a plurality of interlaced registers, including an entry register, forming a last-in-first-out stack, each said register having an ordered plurality of digit compartments for storing digit words representing an arithmetic number, like-order digit compartments of said plurality of registers being juxtapositioned in said memory; entry means coupled to said memory for entering digit words into said entry register; first shifting means responsive to the actuation of said entry means for shifting the contents of each of said registers to the next adjacent one of said registers in a direction in said stack away from said entry register; arithmetic means coupled to said memory for arithmetically combining the contents of said entry register and another one of said registers to form an arithmetic result; result entry means for placing said result in said entry register; and means for displaying the contents of at least some of said registers comprising said last-in-first-out stack as a plurality of superadjacent rows of juxtapositioned digits, individual ones of said rows containing the digits of individual ones of said registers, said display means including means for aligning like-order digits of different rows in columnar fashion.
Claim 2
Dependent Claim
196 words
In an electronic calculator: a memory comprising a plurality of interlaced registers, including an entry register, forming a last-in-first-out stack, each said register having an ordered plurality of digit compartments for storing digit words representing an arithmetic number, like-order digit compartments of said plurality of registers being juxtapositioned in said memory; entry means coupled to said memory for entering digit words into said entry register; first shifting means responsive to the actuation of said entry means for shifting the contents of each of said registers to the next adjacent one of said registers in a direction in said stack away from said entry register; arithmetic means coupled to said memory for arithmetically combining the contents of said entry register and another one of said registers to form an arithmetic result; result entry means for placing said result in said entry register; and means for displaying the contents of at least some of said registers comprising said last-in-first-out stack as a plurality of superadjacent rows of juxtapositioned digits, individual ones of said rows containing the digits of individual ones of said registers, said display means including means for aligning like-order digits of different rows in columnar fashion.
Claim 3
Dependent Claim
64 words
The calculator of claim 1 further including second shifting means responsive to the actuation of said arithmetic means for shifting the contents of the remaining ones of said registers in a direction in said stack toward said entry register when said contents of said entry register and said another one of said registers are combined by said arithmetic means to form said arithmetic result.
Claim 4
Dependent Claim
26 words
The calculator of claim 1 further including a keyboard having a plurality of arithmetic function keys coupled to said arithmetic means for enabling said arithmetic means.
Claim 5
Dependent Claim
13 words
The calculator of claim 1 wherein said memory includes an acoustic delay line.
Claim 6
Dependent Claim
139 words
In an electronic desk top calculator, a recirculating memory unit including a direct access storage means having a register RS, an entry register R1, and an automatic sequential access store comprising a plurality of registers R2, R3, . . . , RN; a plurality of function keys; and a sequential access control means for shifting the contents of said registers, said last-named means including inward shifting means responsive to the actuation of one of said function keys for transferring the contents of said entry register R1 and said registers R2, R3, . . . , RN-1 to the next higher-order registers R2, R3, . . . , RN in said sequential access store, and means responsive to the actuation of said one of said function keys for transferring the contents of said register RS to said entry register R1.
Claim 7
Dependent Claim
139 words
In an electronic desk top calculator, a recirculating memory unit including a direct access storage means having a register RS, an entry register R1, and an automatic sequential access store comprising a plurality of registers R2, R3, . . . , RN; a plurality of function keys; and a sequential access control means for shifting the contents of said registers, said last-named means including inward shifting means responsive to the actuation of one of said function keys for transferring the contents of said entry register R1 and said registers R2, R3, . . . , RN-1 to the next higher-order registers R2, R3, . . . , RN in said sequential access store, and means responsive to the actuation of said one of said function keys for transferring the contents of said register RS to said entry register R1.
Claim 8
Dependent Claim
92 words
The apparatus of claim 5 wherein said calculator further includes means for displaying the contents of said entry register R1 and each one of said plurality of registers R2, R3, . . . , RN in a separate one of a plurality of superadjacent roWs of juxtapositioned digits, said display means including means for aligning like-order digits of said registers R1, R2, . . . , RN in columnar fashion, whereby said display means indicates the order of entry of said contents of said registers R1, R2, . . . , RN.
Claim 9
Dependent Claim
74 words
The apparatus of claim 5 wherein said calculator further includes display means for displaying the contents of said entry register R1 and at least one of said registers of said sequential access store in a separate one of a plurality of superadjacent rows of juxtapositioned digits, said display means including means for aligning like-order digits of said displayed registers in columnar fashion, whereby said display means indicates the order of entry of said contents.
Claim 10
Dependent Claim
133 words
In an electronic desk top calculator, a recirculating memory unit inclding a direct access storage means having a register RS, an entry register R1, and at least one automatic sequential access store comprising a plurality of registers R2, R3, . . . , RN; a plurality of function keys; and a sequential access control means for shifting the contents of said registers, said last-named means including means responsive to the actuation of one of said function keys for transferring the contents of said entry register to said register RS and outward shifting means responsive to the actuation of said one of said function keys for transferring the contents of each of said registers R2, R3, . . . , RN to the next lower-order register R1, R2, . . . , RN-1, respectively.
Claim 11
Dependent Claim
133 words
In an electronic desk top calculator, a recirculating memory unit inclding a direct access storage means having a register RS, an entry register R1, and at least one automatic sequential access store comprising a plurality of registers R2, R3, . . . , RN; a plurality of function keys; and a sequential access control means for shifting the contents of said registers, said last-named means including means responsive to the actuation of one of said function keys for transferring the contents of said entry register to said register RS and outward shifting means responsive to the actuation of said one of said function keys for transferring the contents of each of said registers R2, R3, . . . , RN to the next lower-order register R1, R2, . . . , RN-1, respectively.
Claim 12
Dependent Claim
92 words
The apparatus of claim 8 wherein said calculator further includes means for displaying the contents of said entry register R1 and each one of said plurality of registers R2, R3, . . . , RN in a separate one of a plurality of superadjacent rows of juxtapositioned digits, said display means including means for aligning like-order digits of said registers R1, R2, . . . , RN in columnar fashion, whereby said display means indicates the order o4 emission of said contents of said registers R1, R2, . . . , RN.
Claim 13
Dependent Claim
74 words
The apparatus of claim 8 wherein said calculator further includes display means for displaying the contents of said entry register R1 and at least one of said registers of said sequential access store in a separate one of a plurality of superadjacent rows of juxtapositioned digits, said display means including means for aligning like-order digits of said displayed registers in columnar fashion, whereby said display means indicates the order of entry of saic contents.
Claim 14
Dependent Claim
91 words
The apparatus of claim 8 wherein said sequential access control means further includes inward shifting means responsive to the actuation of a different one of said function keys for transferring the contents of said entry register R1 and and said registers R2, . . . , RN-1 to the next higher-order register R2, R3, . . . , RN in said sequential access store, and means responsive to the actuation of said different one of said function keys for transferring the contents of said register RS to said entry register R1.
Claim 15
Dependent Claim
97 words
The apparatus of claim 11 wherein said calculator further includes means for displaying the contents of said entry register R1 and each one of said plurality of registers R2, R3, . . . , RN in a separate one of a plurality of superadjacent rows of juxtapositioned digits, said display means including means for aligning like-order digits of said registers R1, R2, . . . , RN in columnar fashion, whereby said display means indicates the order of entry and the order of emission of said contents of said registers R1, R2, . . . , RN.
Claim 16
Dependent Claim
181 words
In an electronic desk top calculator, a recirculating memory unit including an entry register R1 and an automatic sequential access store comprising a plurality of registers R2, R3, . . . , RN, each said register having an ordered plurality of digit compartments for storing digit words representing an arithmetic number, like order digit compartments of said registers being juxtapositioned in said memory; a plurality of function keys including a subplurality of mathemtical function keys; a plurality of digit keys; an arithmetic unit responsive to the actuation of said mathemtical function keys for mathematically combining the contents of said entry register R1 and said register R2 to produce resultant data; and sequential access control means for shifting the contents of said registers, said last-named means including means responsive to said mathematical function keys for placing said resultant data into said entry register R1 and outward shifting means responsive to said mathematical function keys for transferring the contents of each of said registers R3, R4, . . . , RN to the next lower-order register R2, R3, . . . , RN-1.
Claim 17
Dependent Claim
181 words
In an electronic desk top calculator, a recirculating memory unit including an entry register R1 and an automatic sequential access store comprising a plurality of registers R2, R3, . . . , RN, each said register having an ordered plurality of digit compartments for storing digit words representing an arithmetic number, like order digit compartments of said registers being juxtapositioned in said memory; a plurality of function keys including a subplurality of mathemtical function keys; a plurality of digit keys; an arithmetic unit responsive to the actuation of said mathemtical function keys for mathematically combining the contents of said entry register R1 and said register R2 to produce resultant data; and sequential access control means for shifting the contents of said registers, said last-named means including means responsive to said mathematical function keys for placing said resultant data into said entry register R1 and outward shifting means responsive to said mathematical function keys for transferring the contents of each of said registers R3, R4, . . . , RN to the next lower-order register R2, R3, . . . , RN-1.
Claim 18
Dependent Claim
64 words
The apparatus of claim 13 wherein said calculator further includes means for displaying the contents of each one of said registers in a separate one of a plurality of superadjacent rows of juxtapositioned digits, said display means including means for aligning like-order digits of said registers in columnar fashion, whereby said display means indicates the order of emission of said contents of said registers.
Claim 19
Dependent Claim
74 words
The apparatus of claim 13 wherein said calculator further includes display means for displaying the contents of said entry register R1 and at least one of said registers of said sequential access store in a separate one of a plurality of superadjacent rows of juxtapositioned digits, said display means including means for aligning like-order digits of said displayed registers in columnar fashion, whereby said display means indicates the order of entry of said contents.
Claim 20
Dependent Claim
57 words
The apparatus of claim 13 wherein said sequential access control means further includes inward shifting means responsive to said digit keys for transferring the contents of said entry register R1 and said registers R2, R3, . . . , RN-1 to the next higher-order registers R2, R3, . . . , RN in said sequential access store.
Claim 21
Dependent Claim
69 words
The apparatus of Claim 16 wherein said calculator further includes means for displaying the contents of each one of said registers in a separate one of a plurality of superadjacent rows of juxtapositioned digits, said display means including means for aligning like-order digits of said registers in columnar fashion, whereby said display means indicates the order of entry and the order of emission of said contents of said registers.
Claim 22
Dependent Claim
106 words
In an electronic desk top calculator, a recirculating memory unit for nonaddressable data including an entry register R1 and an automatic sequential access store comprising a plurality of registers R2, R3, . . . , RN; a plurality of function keys; a plurality of digit keys; and sequential access control means for shifting the contents of said registers, said last-named means including inward shifting means responsive to said digit keys for transferring the contents of said entry register R1 and said registers R2, R3, . . . , RN-1 to the next higher-order register R2, R3, . . . , RN in said sequential access store.
Claim 23
Dependent Claim
106 words
In an electronic desk top calculator, a recirculating memory unit for nonaddressable data including an entry register R1 and an automatic sequential access store comprising a plurality of registers R2, R3, . . . , RN; a plurality of function keys; a plurality of digit keys; and sequential access control means for shifting the contents of said registers, said last-named means including inward shifting means responsive to said digit keys for transferring the contents of said entry register R1 and said registers R2, R3, . . . , RN-1 to the next higher-order register R2, R3, . . . , RN in said sequential access store.
Claim 24
Dependent Claim
64 words
The apparatus of Claim 18 wherein said calculator further includes means for displaying the contents of each one of said registers in a separate one of a plurality of superadjacent rows of juxtapositioned digits, said display means including means for aligning like-order digits of said registers in columnar fashion, whereby said display means indicates the order of entry of said contents of said registers.
Claim 25
Dependent Claim
74 words
The apparatus of claim 18 wherein said calculator further includes display means for displaying the contents of said entry register R1 and at least one of said registers of said sequential access store in a separate one of a plurality of superadjacent rows of juxtapositioned digits, said display means including means for aligning like-order digits of said displayed registers in columnar fashion, whereby said display means indicates the order of entry of said contents.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |