US3704890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for displaying symbols in a pseudo-random sequence
Assignee: Pitney Bowes Inc
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Filing: 1970-12-28
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Granted: 1972-12-05
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Expires: 1990-12-28
Abstract
Abstract A device for displaying numbers of a pseudo-random sequence. For each change in the number to be displayed, a mutilated gear is rotated by a suitable mechanism through a predetermined angular displacement. For each such rotation, a variable number of teeth of the mutilated gear drive a number wheel through a variable number of numeral display positions. Two different locking elements prevent rotation between actuations. One of the locking elements carries a window shutter which in combination with a second window blocks observation of the number wheel during actuation and reveals the wheel when indexed.
Inventors
- 👤 Fredric E Zucker
- 👤 Joseph Kaswer Jr
- 👤 Thomas S Wilczynski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:30
CPC Classifications
G; G07; G07F; G07F7/00; G07F7/08; G07F7/10; G07F7/1016; G07C; G07C15/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
143 words
A device for displaying symbols in pseudo-random sequence: comprising a frame; a main drive shaft rotatably mounted in said frame; wheel display means rotatably mounted on said frame; gearing means including at least one mutilated gear for interconnecting said drive shaft and said wheel display means so that said display means may be rotated through varying angles dependent upon the mutilated pattern of said gear; a first locking means movable into and out of positive locking condition with respect to a first portion of said gearing means; a second locking means movable into and out of positive locking condition with respect to a second portion of said gearing means; and cam means driven by said main drive shaft for moving both of said locking means out of their respective locking conditions when said drive shaft is to rotatably index said wheel display means.
Claim 2
Independent Claim
143 words
A device for displaying symbols in pseudo-random sequence: comprising a frame; a main drive shaft rotatably mounted in said frame; wheel display means rotatably mounted on said frame; gearing means including at least one mutilated gear for interconnecting said drive shaft and said wheel display means so that said display means may be rotated through varying angles dependent upon the mutilated pattern of said gear; a first locking means movable into and out of positive locking condition with respect to a first portion of said gearing means; a second locking means movable into and out of positive locking condition with respect to a second portion of said gearing means; and cam means driven by said main drive shaft for moving both of said locking means out of their respective locking conditions when said drive shaft is to rotatably index said wheel display means.
Claim 3
Dependent Claim
44 words
Apparatus as defined by claim 1 wherein said wheel display means includes two displaY wheels, and said gearing means includes two separate gear trains functionally arranged in parallel relation and each driven directly from said main drive shaft to rotate a respective display wheel.
Claim 4
Dependent Claim
62 words
Apparatus as defined by claim 1: additionally comprising shutter means mounted on said frame for movement into and out of view blocking position with respect to said display wheel means; and said cam means including actuating means operated in timed relation to the rotation of said main drive shaft for moving said shutter means into and out of said view blocking position.
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) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |