US3696995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calculator
Assignee: Individual
•
Filing: 1971-09-27
•
Granted: 1972-10-10
•
Expires: 1991-09-27
Abstract
Abstract A calculator of the type with successive digit or numeral wheels with improved carryover or transfer means between wheels. Transfer wheels are used between successive digit or numeral wheels. Each digit wheel has a finger or projection which picks up abutments on a transfer wheel for driving it and effecting the transfer or step movement. The transfer wheel has spaced abutments which are picked up by the projection on the digit or numeral wheel. These abutments on each transfer wheel are displaced angularly from ten predetermined stopping positions of the transfer wheel. When there are simultaneous transfers or carryovers of several digit wheels, there is a slight delay in the pick up of each transfer wheel for effecting the transfer with the result that the transfer takes place sequentially thereby eliminating the imposition of a sudden, heavy torque load on a single driving digit wheel.
Inventors
- 👤 William Kasner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:01
CPC Classifications
G; G06; G06C; G06C1/00; G06C15/00; G06C15/26
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
158 words
In a calculator of the type having a series of digit wheels, transfer means between the digit wheels whereby a complete revolution of a digit wHeel transfers a step movement to a subsequent digit wheel, the improvements comprising said transfer means embodying a single projection on a digit wheel, a second wheel to which a step movement is to be transferred by the projection on said digit wheel, said second wheel being adapted for step movements in increments of one-tenth of a revolution and having a predetermined stopping position, said second wheel having abutments positioned to be engaged by the projection on the digit wheel for effecting the step movement, said abutments being angularly displaced predetermined amounts from said predetermined stopping positions whereby when transfer is to take place, said digit wheel moves through a predetermined number of degrees constituting a delay before the projection picks up an abutment on the second wheel and moves the second wheel.
Claim 2
Dependent Claim
158 words
In a calculator of the type having a series of digit wheels, transfer means between the digit wheels whereby a complete revolution of a digit wHeel transfers a step movement to a subsequent digit wheel, the improvements comprising said transfer means embodying a single projection on a digit wheel, a second wheel to which a step movement is to be transferred by the projection on said digit wheel, said second wheel being adapted for step movements in increments of one-tenth of a revolution and having a predetermined stopping position, said second wheel having abutments positioned to be engaged by the projection on the digit wheel for effecting the step movement, said abutments being angularly displaced predetermined amounts from said predetermined stopping positions whereby when transfer is to take place, said digit wheel moves through a predetermined number of degrees constituting a delay before the projection picks up an abutment on the second wheel and moves the second wheel.
Claim 3
Dependent Claim
78 words
A calculator as in claim 1, having a plurality of similar wheels adapted for transfer of a step movement from each wheel to a subsequent wheel, there being corresponding delay in movement as between successive wheels such that when there is a simultaneous transfer of a number of wheels resulting from an incremental movement of the digit wheel, the step movements take place sequentially thereby eliminating the imposition of a sudden large torque load on a digit wheel.
Claim 4
Dependent Claim
27 words
A calculator as in claim 1, including detent means cooperating with the digit wheels whereby to establish ten predetermined stopping positions of each of the digit wheels.
Claim 5
Dependent Claim
51 words
A calculator as in claim 1, wherein said abutments are arranged in pairs, there being a pair for each of the ten stopping positions of the second wheel, the abutments of each pair being similarly angularly displaced from the angle of the stopping position to provide for operation in either direction.
Claim 6
Dependent Claim
49 words
A calculator as in claim 4, wherein one of said abutments of each pair is positioned to be able to engage the projection on the digit wheel so as to prevent the step movement of the second wheel unless the step movement of the digit wheel is substantially executed.
Claim 7
Dependent Claim
21 words
A calculator as in claim 1, wherein said abutments are formed by way of radial slots formed in the second wheel.
Claim 8
Dependent Claim
28 words
A calculator as in claim 1, wherein the second wheel is in the form of a transfer wheel positioned between said digit wheel and a second digit wheel.
Claim 9
Dependent Claim
31 words
A calculator as in claim 7, wherein said transfer wheel and a second digit wheel each have ten teeth meshing with each other, said transfer wheel driving said second digit wheel.
References Cited (Backward Citations)
US1574249A
Cited
US1607294A
Cited
US1764915A
Cited
US1974239A
Cited
US2771245A
Cited
US2879939A
Cited
US2957625A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |