US3706875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calculator
Assignee: Individual
•
Filing: 1970-12-02
•
Granted: 1972-12-19
•
Expires: 1990-12-02
Abstract
Abstract A calculator of the type having digit or counter wheels which can be manually actuated for addition and subtraction. The calculator is in a relatively thin case or housing with opposite sides so constructed that access can be had to the digit or counter wheels from either side of the housing to actuate them with a stylus. The counter is hinged within a check book so that it can be readily moved to expose either side for making calculations. A digit or number is put in as an input by rotating any digit wheel with a stylus. Thus, a movement by the stylus on one side causes the machine to add and the same type or kind of movement on the opposite side causes the machine to subtract, the digit wheel being rotated in the opposite direction. The transfer means between digit wheels comprises idler wheels. Each idler wheel meshes with a digit wheel that is driven by it. Each idler wheel is driven by a digit wheel; each digit wheel has a single tooth positioned to effect the one-step transfer to an idler wheel when the digit wheel makes a complete revolution. The teeth on the idler wheels and the digit wheels are relatively displaced axially with respect to their hubs, alternate digit wheels and idler wheels being inverted to permit closer spacing with each idler wheel driving the next digit wheel but not meshing with the preceding 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
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
140 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, means whereby an individual digit wheel can be engaged for rotating it an angular amount corresponding to an individual digit, the improvement comprising means whereby digital inputs may be made to individual digit wheels from opposite sides of the wheels, said wheels being free to rotate in both directions at all times, clockwise manual actuations from opposite sides rotating a wheel in opposite directions for addition and subtraction openings being provided for access to the digit wheels from both sides, there being numerals positioned adjacent the openings to identify inputs, the numerals being arranged to appear in the same position and order on both sides.
Claim 2
Dependent Claim
140 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, means whereby an individual digit wheel can be engaged for rotating it an angular amount corresponding to an individual digit, the improvement comprising means whereby digital inputs may be made to individual digit wheels from opposite sides of the wheels, said wheels being free to rotate in both directions at all times, clockwise manual actuations from opposite sides rotating a wheel in opposite directions for addition and subtraction openings being provided for access to the digit wheels from both sides, there being numerals positioned adjacent the openings to identify inputs, the numerals being arranged to appear in the same position and order on both sides.
Claim 3
Dependent Claim
36 words
A device in claim 1, wherein the digit wheels have numerals thereon to provide a readout, the numerals being on both sides of the digit wheels to allow readout on both the addition and subtraction sides.
Claim 4
Dependent Claim
42 words
A device as in claim 2, wherein the numerals on the digit wheels are in reverse order on the opposite sides of the wheels and the numerals on one side are 180* out of phase with the numerals on the other side.
Claim 5
Dependent Claim
27 words
A device as in claim 1, wherein said openings are arcuate and are relatively inverted on opposite sides to appear alike when entering inputs from either side.
Claim 6
Dependent Claim
157 words
In a calculator of the type having a series of digit wheels and transfer means between digit wheels whereby a full revolution of a digit wheel transfers an incremental step to subsequent digit wheel means comprising idler transfer wheels in the form of toothed wheels, each of which constantly meshes with a toothed digit wheel each digit wheel having means for driving an idler transfer wheel whereby to impart to another digit wheel an incremental step at each revolution of the said digit wheel; said toothed digit wheels having hubs, the teeth being axially displaced relatively to the hubs, the toothed idler wheels also having teeth axially displaced relative to the hubs, all digit wheels and idler wheels lying in a place with alternate digit wheels inverted relative to each other, whereby the teeth of alternate digit wheels mesh with the adjacent idler wheel whereas the other digit wheels do not have teeth meshing with idler wheels.
Claim 7
Dependent Claim
157 words
In a calculator of the type having a series of digit wheels and transfer means between digit wheels whereby a full revolution of a digit wheel transfers an incremental step to subsequent digit wheel means comprising idler transfer wheels in the form of toothed wheels, each of which constantly meshes with a toothed digit wheel each digit wheel having means for driving an idler transfer wheel whereby to impart to another digit wheel an incremental step at each revolution of the said digit wheel; said toothed digit wheels having hubs, the teeth being axially displaced relatively to the hubs, the toothed idler wheels also having teeth axially displaced relative to the hubs, all digit wheels and idler wheels lying in a place with alternate digit wheels inverted relative to each other, whereby the teeth of alternate digit wheels mesh with the adjacent idler wheel whereas the other digit wheels do not have teeth meshing with idler wheels.
Claim 8
Dependent Claim
50 words
A device as in claim 5, wherein the idler transfer wheels are constructed to have teeth meshing with the teeth of a toothed digit wheel driven thereby and the teeth on the idler transfer wheel and the teeth on its driving digit wheel being so related as to not intermesh.
Claim 9
Dependent Claim
23 words
A device as in claim 5, wherein the transfer means comprises a single tooth on each digit wheel, which drives an idler wheel.
Claim 10
Dependent Claim
69 words
A device as in claim 5, wherein the wheels have equally angularly spaced projections, a control member cooperable with projections of each of certain wheels, the said member having two end parts positioned to engage spaced parts of the same wheel, one end part positioned to ride over a tooth while the other end part moves between teeth whereby to constrain the wheel to accurate step movements without overrun.
Claim 11
Dependent Claim
16 words
A device as in claim 8, wherein said control member is a pivotEd bell crank lever.
References Cited (Backward Citations)
US1607294A
Cited
US1764915A
Cited
US2348299A
Cited
US2771245A
Cited
US2797047A
Cited
US2879939A
Cited
US2541463A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |