Patent US4421420A successfully refreshed from Google Patents.
US4421420A
Expired / Lapsed
US
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Electronic timepiece with animation
Assignee: Suwa Seikosha KK
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Filing: 1981-07-07
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Granted: 1983-12-20
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Expires: 2001-07-07
Abstract
Abstract An electronic analog timepiece having an illustration on the dial provides animation by including a portion of the illustration on the second hand and by giving the second hand an erratic motion. Logic circuitry combines a plurality of frequency signals from the divider circuits such that periodic but erratic second hand motion is achieved between moments when the second hand is accurate. Normal second hand motion is also selectively provided.
Inventors
- 👤 Kenichi Ushikoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:18
CPC Classifications
G; G04; G04B; G04B25/00; G04B25/06; G04B45/00; G04B45/0007
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
222 words
In an electronic timepiece having a source of high frequency standard signals, a timekeeping divider circuit dividing down said high frequency standard signals to a timekeeping signal of a lower frequency, a motor, means for driving said motor in response to said timekeeping signals, a display including hands driven by said motor, the improvements therein comprising: a dial and a second hand having illustrations thereon; means for obstructing passage of said timekeeping signals to said motor driving means; means for generating and inputting a secondary signal to said motor driving means, said timekeeping signals being obstructed, said secondary signals causing said motor to drive at an erratic rate, at least said secondary signals outputting a stop signal with a period lonqer than that of said timekeeping signal, said hands being stationary during said stop period, and a quick feed signal with a constant period shorter than that of said timekeeping signal; total motion of said second hand produced by said stop signal and said quick feed siqnal causing said second hand to indicate the same accurate second display position as if driven over the same elapsed time by said timekeeping siqnal, switch means for selecting one of said timekeeping signals and said secondary signals, at least one of said hands selectively moving with an erratic motion when said secondary signals are selected.
Claim 2
Dependent Claim
222 words
In an electronic timepiece having a source of high frequency standard signals, a timekeeping divider circuit dividing down said high frequency standard signals to a timekeeping signal of a lower frequency, a motor, means for driving said motor in response to said timekeeping signals, a display including hands driven by said motor, the improvements therein comprising: a dial and a second hand having illustrations thereon; means for obstructing passage of said timekeeping signals to said motor driving means; means for generating and inputting a secondary signal to said motor driving means, said timekeeping signals being obstructed, said secondary signals causing said motor to drive at an erratic rate, at least said secondary signals outputting a stop signal with a period lonqer than that of said timekeeping signal, said hands being stationary during said stop period, and a quick feed signal with a constant period shorter than that of said timekeeping signal; total motion of said second hand produced by said stop signal and said quick feed siqnal causing said second hand to indicate the same accurate second display position as if driven over the same elapsed time by said timekeeping siqnal, switch means for selecting one of said timekeeping signals and said secondary signals, at least one of said hands selectively moving with an erratic motion when said secondary signals are selected.
Claim 3
Dependent Claim
36 words
An electronic timepiece as claimed in claim 1, wherein said switch means is adapted to select said modes alternately, whereby alternate periods of normal timekeeping and erratic motion are provided for said at least one hand.
Claim 4
Dependent Claim
60 words
An electronic timepiece as claimed in claim 1 or 2, wherein said means for inputting a secondary signal includes at least two dividers receiving signals from said timekeeping divider circuit and outputting a plurality of different frequency signals; means for selectively mixing said plurality of signals with an output from said timekeeping divider circuit to provide said erratic secondary signal.
Claim 5
Dependent Claim
35 words
An electronic timepiece as claimed in claim 3, wherein one of said plurality of signals is inputted to said selecting means, said signal input to said switch means causing said modes to be alternately selected.
Claim 6
Dependent Claim
33 words
An electronic timepiece as claimed in claim 4, wherein said switch means is adapted to receive an externally initiated signal, said externally initiated signal placing said timepiece in said normal mode of operation.
Claim 7
Dependent Claim
21 words
An electronic timepiece as claimed in claim 5, and further comprising a switch, closing said switch generating said externally initiated signal.
Claim 8
Dependent Claim
25 words
An electronic timepiece as claimed in claim 2, and further comprising a switch, closing said switch causing said switch means to select said normal mode.
Claim 9
Dependent Claim
21 words
An electronic timepiece as claimed in claim 1 or 2, wherein said erratic motion further includes a period of normal motion.
Claim 10
Dependent Claim
22 words
An electronic timepiece as claimed in claim 1 or 2, wherein said accelerated hand motion is one of forward and reverse motion.
Claim 11
Dependent Claim
35 words
An electronic timepiece as claimed in claim 1 or 2, wherein said erratic motion includes two periods of accelerated hand motion, said periods being a period of forward and a period of reverse hand motion.
Claim 12
Dependent Claim
30 words
An electronic timepiece as claimed in claim 3, wherein said means for selectively mixing said plurality of signals with an output from said timekeeping divider circuit includes an AND gate.
Claim 13
Dependent Claim
36 words
An electronic timepiece as claimed in claim 9, wherein said reverse motion is produced by a driving signal comprised of two consecutive pulses of the same polarity followed by two consecutive pulses of the opposite polarity.
Claim 14
Dependent Claim
18 words
An electronic timepiece as claimed in claim 12, wherein consecutive signals of opposite polarity have different pulse widths.
Claim 15
Dependent Claim
19 words
An electronic timepiece as claimed in claim 13, wherein a shorter signal precedes a longer signal of opposite polarity.
Claim 16
Dependent Claim
19 words
An electronic timepiece as claimed in claim 14, wherein the opposite polarity signals are 3 and 5 milliseconds respectively.
References Cited (Backward Citations)
US2667738A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-12-19 | 1987-06-20 | 1987-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-19 | 1991-06-20 | 1991-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-19 | 1995-06-20 | 1995-12-20 | $7700.00 | Window Closed / Lapsed |