US3680775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calculating device
Assignee: Peoria Journal Star Inc
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Filing: 1971-04-13
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Granted: 1972-08-01
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Expires: 1991-04-13
Abstract
Abstract A calculating device for making mathematical computations constituted by a sleeve member, an endless belt and a slide member. There are longitudinally extending mathematical scales on both the sleeve member and the belt and the belt is trained around the ends of the slide member to form an assembly which is telescopically slidable into the sleeve. There are slots in the sleeve alongside the sleeve mathematical scale with which the belt scale comes into registry when the slide/belt assembly is within the sleeve. A computation based on the relationship z f(x,y) may be made by setting x1 on the belt mathematical scale adjacent the identity operator on the sleeve mathematical scale and reading z1 on the belt scale adjacent y1 on the sleeve scale.
Inventors
- 👤 Walter K Schwarz
- 👤 David J Schlink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:10
CPC Classifications
G; G06; G06G; G06G1/00; G06G1/0005; G06G1/0073
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
187 words
A calculating device for making mathematical computations comprising an elongate slide member, an endless belt having a circumference slightly greater than the sum of twice the length plus twice the thickness of the slide member, said belt being trained around the ends of said slide member and being movable therearound, a mathematical scale on said endless belt extending longitudinally thereof, a sleeve formed for a telescopic sliding fit therein of said slide member and belt assembly so that said assembly may slide lengthwise within the sleeve member, said sleeve member also having an elongate longitudinally extending slot in registry with said belt mathematical scale when said slide member and belt assembly is within the sleeve member, a mathematical scale having an identity operator index on the sleeve member alongside said slot, said sleeve mathematical scale having the same unit dimension as said belt mathematical scale, whereby a computation based on the relationship z f(x,y) may be made by setting x1 on the belt mathematical scale adjacent the identity operator on the sleeve mathematical scale and reading z1 on the belt scale adjacent y1 on the sleeve scale.
Claim 2
Dependent Claim
187 words
A calculating device for making mathematical computations comprising an elongate slide member, an endless belt having a circumference slightly greater than the sum of twice the length plus twice the thickness of the slide member, said belt being trained around the ends of said slide member and being movable therearound, a mathematical scale on said endless belt extending longitudinally thereof, a sleeve formed for a telescopic sliding fit therein of said slide member and belt assembly so that said assembly may slide lengthwise within the sleeve member, said sleeve member also having an elongate longitudinally extending slot in registry with said belt mathematical scale when said slide member and belt assembly is within the sleeve member, a mathematical scale having an identity operator index on the sleeve member alongside said slot, said sleeve mathematical scale having the same unit dimension as said belt mathematical scale, whereby a computation based on the relationship z f(x,y) may be made by setting x1 on the belt mathematical scale adjacent the identity operator on the sleeve mathematical scale and reading z1 on the belt scale adjacent y1 on the sleeve scale.
Claim 3
Dependent Claim
76 words
A calculating device as set forth in claim 1 wherein said endless belt is transparent and said slide member is of substantially the same length as said sleeve member, said slide member having an index at a position directly underneath said belt scale spaced from one end of said slide member a distance corresponding to the distance that the identity operator index on the sleeve scale is spaced from the corresponding end of said sleeve member.
Claim 4
Dependent Claim
91 words
A calculating device as set forth in claim 1 having a second mathematical scale on the belt parallel to the first belt scale, a second elongate slot in said sleeve member parallel to the first slot, the second slot being in registry with the second belt scale when the slide member and endless belt assembly is within the sleeve member, and a second mathematical scale on the sleeve alongside said second slot, the second belt scale and second sleeve scale each having the same unit dimensions as the first belt scale.
Claim 5
Dependent Claim
87 words
A calculating device as set forth in claim 1 wherein said scales are logarithmic scales and said identity operator index is a unity index whereby a quantity expressed in a first unit may be converted to a corresponding quantity expressed in a second unit by setting a conversion factor on the belt logarithmic scale adjacent said unity index on the sleeve logarithmic scale and reading the quantity in the second unit on the belt scale adjacent the corresponding quantity in the first unit on the sleeve scaLe.
Claim 6
Dependent Claim
75 words
A calculating device as set forth in claim 4 wherein said endless belt is transparent and said slide member is of substantially the same length as said sleeve member, said slide member having an index at a position directly underneath said belt scale spaced from one end of said slide member a distance corresponding to the distance that the unity index on the sleeve scale is spaced from the corresponding end of said sleeve member.
Claim 7
Dependent Claim
34 words
A calculating device as set forth in claim 5 having coded decimal point locating indicia on said sleeve scale and corresponding coded decimal point locating indicia on said slide member underneath said belt scale.
Claim 8
Dependent Claim
86 words
A calculating device as set forth in claim 1 wherein said sleeve member is constituted by a rectangular sheet of rigid transparent plastic folded to form a front wall and a back wall of said sleeve joined by relatively narrow side walls with one end of said sheet lapping the other end of said sheet at an area along said back wall, a panel of opaque material having said sleeve scale thereon adhering to aid front wall with elongate openings in said panel defining said slots.
Claim 9
Dependent Claim
89 words
A calculating device as set forth in claim 4 having a second logarithmic scale on the belt parallel to the first belt scale, a second elongate slot in said sleeve parallel to said first slot, the second slot being in registry with the second belt scale when the slide member and endless belt assembly is within the sleeve member, and a second logarithmic scale on the sleeve alongside the second slot, the second belt and second sleeve scales each having the same unit dimensions as the first belt scale.
Claim 10
Dependent Claim
89 words
A calculating device as set forth in claim 6 having a second logarithmic scale on the belt parallel to the first belt scale, a second elongate slot in said sleeve parallel to said first slot, the second slot being in registry with the second belt scale when the slide member and endless belt assembly is within the sleeve member and a second logarithmic scale on the sleeve alongside the second slot, the second belt and second sleeve scales each having the same unit dimensions as the first belt scale.
Claim 11
Dependent Claim
86 words
A calculating device as set forth in claim 9 having a third logarithmic scale on the belt alongside the first belt scale extending in the DIRECTION OPPOSITE THEREFROM AND HAVING A FOURTH LOGARITHMIC SCALE ON THE BELT ALONGSIDE SAID SECOND BELT SCALE EXTENDING IN THE DIRECTION OPPOSITE THEREFROM, SAID THIRD AND FOURTH BELT SCALES BEING IN REGISTRY WITH SAID SLOTS WHEN THE SLIDE MEMBER AND SLEEVE MEMBER ARE ALIGNED SO THAT SAID THIRD AND FOURTH BELT SCALES EXTEND IN THE SAME DIRECTION AS SAID SLEEVE SCALES.
Claim 12
Dependent Claim
42 words
A calculating device as set forth in claim 6 wherein said decimal point locating indicia are constituted by the boundaries between a plurality of adjacent stripes superimposed upon said sleeve scale and located on said slide directly underneath said belt scale, respectively.
Claim 13
Dependent Claim
30 words
A calculating device as set forth in claim 11 wherein said stripes are of different colors with corresponding stripes on the slide and the sleeve being of the same colors.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |