US3699313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slide rule with operational guidance and decimal point location means
Assignee: Individual
•
Filing: 1971-05-03
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Granted: 1972-10-17
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Expires: 1991-05-03
Abstract
Abstract A logarithmic scale slide rule having means for readily determining operational direction and decimal location, comprising a system of oppositely facing brackets enclosing each 1 to 9.9999 scale range, and indicia symbols, whose first or second shape has one characterization to indicate the value ''''1'''' and another characterization to indicate the value of ''''0'''', said symbols being associated with certain of said brackets in such a manner as to indicate a plus or minus value whereby the sum of the values of said symbols encountered in the solution of a given problem will represent the power of 10, for the problem solution.
Inventors
- 👤 Wendell Y Huo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:22
CPC Classifications
G; G06; G06G; G06G1/00; G06G1/02; G06G1/10; G06G1/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
205 words
A slide rule comprising, a pair of relatively movable scale bearing members suitably secured together so that a scale extending along the edge of one member will be visibly related with a corresponding scale on the edge of the other member, a main, conventional, logarithmic scale extending over at least one order of magnitude and bounded by the index ''''1'''' extending along one edge of one of said members, a second scale corresponding to said main scale and extending in the same direction as said main scale extending along the edge of the other of said members. an indicator movable along said scales and extending transversely thereof, a first type bracket located adjacent each said index of said main scale with its bight facing the increasing scale direction and including the number ''''1'''', a second type bracket located adjacent each said index of said main scale with its bight facing the decreasing scale direction and including the number 9,999, a first type indicia positioned adjacent and within said bight of said first type bracket to indicate a decimal value of ''''1'''', and a second type indicia positioned adjacent and within the bight of said second type bracket to indicate a decimal value of ''''0'''' .
Claim 2
Dependent Claim
205 words
A slide rule comprising, a pair of relatively movable scale bearing members suitably secured together so that a scale extending along the edge of one member will be visibly related with a corresponding scale on the edge of the other member, a main, conventional, logarithmic scale extending over at least one order of magnitude and bounded by the index ''''1'''' extending along one edge of one of said members, a second scale corresponding to said main scale and extending in the same direction as said main scale extending along the edge of the other of said members. an indicator movable along said scales and extending transversely thereof, a first type bracket located adjacent each said index of said main scale with its bight facing the increasing scale direction and including the number ''''1'''', a second type bracket located adjacent each said index of said main scale with its bight facing the decreasing scale direction and including the number 9,999, a first type indicia positioned adjacent and within said bight of said first type bracket to indicate a decimal value of ''''1'''', and a second type indicia positioned adjacent and within the bight of said second type bracket to indicate a decimal value of ''''0'''' .
Claim 3
Dependent Claim
95 words
A slide rule as in claim 1 wherein said scale bearing members consist of an upper and a lower part of an elongate stationary body, said parts being held in fixed relation with each other by front and rear connecting plates adjacent each end of the body, and a slider mounted between said parts and longitudinally adjustable with respect thereto, said main scale being located on one of said stationary body parts and said second scale being located on said slider, and said indicator consists of a hairline indicator movable lengthwise of said stationary body.
Claim 4
Dependent Claim
64 words
A slide rule as in claim 2 further comprising a third scale corresponding to said main scale and extending in the opposite direction of said main scale located on said slider, third type indicia located adjacent said first type indicia to indicate a decimal value of ''''0'''', and fourth type indicia located adjacent said second type indicia to indicate a decimal value of ''''1''''.
Claim 5
Dependent Claim
31 words
A slide rule as in claim 3 wherein each type indicia includes first and second marks, said first mark indicating a hairline operation and said second mark indicating a slider operation.
Claim 6
Dependent Claim
13 words
A slide rule as in claim 4 wherein said marks are vertically spaced.
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) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |