US3832054A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic print timer
Assignee: Sable Photo Works Inc
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Filing: 1973-06-06
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Granted: 1974-08-27
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Expires: 1993-06-06
Abstract
Abstract This invention relates to a multiple-event timer that presents the user with a limited number of preselected time interval choices for two or more related events which bear a precise and known relationship to one another such that the effect of a change in the time interval for one such event has a predictable effect on its relationship to the companion events. More particularly, the instant invention relates to a timer specifically suited for use in timing the three primary color exposures of a color print being made by the tri-color printing method wherein the several available discrete time intervals presented to the user are preselected and separated from one another by the same equal fraction of a photographic stop.
Inventors
- 👤 A Sable
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:24
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/72; G03B27/73
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
127 words
The photographic timer which comprises: pulse generating means operative upon actuation to produce a series of discrete timed pulses; pulse-counting means connected to the pulsegenerating means operative to receive the timed pulses and repeatedly count same in cyclic fashion; decoder means connected to the pulse-counting means adapted to discriminate among the timed pulses and select therefrom those bearing a logarithmic relationship to one another amounting to fractional parts of an f-stop; one or more pulse-selecting means connected to the decoder means, each operative upon actuation to choose a particular pulse from among the preselected array thereof; and, triggering means connected to each pulse selecting means responsive to the particular pulse chosen by the latter operative to terminate the timing cycle upon expiration of the chosen time interval.
Claim 2
Dependent Claim
127 words
The photographic timer which comprises: pulse generating means operative upon actuation to produce a series of discrete timed pulses; pulse-counting means connected to the pulsegenerating means operative to receive the timed pulses and repeatedly count same in cyclic fashion; decoder means connected to the pulse-counting means adapted to discriminate among the timed pulses and select therefrom those bearing a logarithmic relationship to one another amounting to fractional parts of an f-stop; one or more pulse-selecting means connected to the decoder means, each operative upon actuation to choose a particular pulse from among the preselected array thereof; and, triggering means connected to each pulse selecting means responsive to the particular pulse chosen by the latter operative to terminate the timing cycle upon expiration of the chosen time interval.
Claim 3
Dependent Claim
22 words
The photographic timer as set forth in claim 1 in which: the pulse-generating means produces discrete pulses having equal time intervals therebetween.
Claim 4
Dependent Claim
19 words
The photographic timer as set forth in claim 1 in which: the pulse-generating means cycles approximately once a minute.
Claim 5
Dependent Claim
38 words
The photographic timer as set forth in claim 1 in which: approximately one minute separates the minimum and maximum preselected time intervals with the minimum being greater than a second and the maximum being less than 2 minutes.
Claim 6
Dependent Claim
32 words
The photographic timer as set forth in claim 1 in which: the range of preselected time intervals extends from a minimum of approximately 3 seconds to a maximum of approximately 64 seconds.
Claim 7
Dependent Claim
26 words
The timer as set forth in claim 1 in which: at least two pulse-selecting means are connected to the decoder means and are independently responsive thereto.
Claim 8
Dependent Claim
86 words
The timer as sEt forth in claim 1 in which: at least two pulse-selecting means are connected to the decoder means; and, in which the preselected time intervals available to each of said pulse-selecting means from the decoder means are chosen such that incremental changes of the same magitude in two or more of said selecting means will evoke essentially the same response in the appropriate emulsion layer of a multi-layer print-making material irrespective of the overall time intervals to which said selecting means are set.
Claim 9
Dependent Claim
122 words
The timer for timing the component exposures of a color photographic print which comprises: means connectable to a source of electrical energy operative upon actuation to repeatedly generate in cyclic fashion a series of discrete pulses bearing a logarithmic relationship to one another such that the intervals therebetween constitute equal fractional parts of an f-stop; means comprising a selector switch for each color component adjustably connected to said pulse-generating means adapted upon actuation to pick a particular pulse during each cycle from the preselected array thereof independently of the other selector switches; and, means connected to each of said selector switches responsive to the particular pulse chosen thereby so as to terminate the component exposure at the selected time within the cycle.
Claim 10
Dependent Claim
122 words
The timer for timing the component exposures of a color photographic print which comprises: means connectable to a source of electrical energy operative upon actuation to repeatedly generate in cyclic fashion a series of discrete pulses bearing a logarithmic relationship to one another such that the intervals therebetween constitute equal fractional parts of an f-stop; means comprising a selector switch for each color component adjustably connected to said pulse-generating means adapted upon actuation to pick a particular pulse during each cycle from the preselected array thereof independently of the other selector switches; and, means connected to each of said selector switches responsive to the particular pulse chosen thereby so as to terminate the component exposure at the selected time within the cycle.
Claim 11
Dependent Claim
110 words
The color print timer as set forth in claim 8 in which: the pulse-generating means comprises a motor and a notched disk operatively connected to the motor so as to make a single revolution in a total elapsed time that exceeds the maximum of the preselected time intervals, the notches in said disk being spaced around the rim thereof in a logarithmic fashion corresponding to the chosen fraction of an f-stop; and, in which said selector switches each have a plurality of contacts, one of which is connected to each notch in the disk, and an adjustable switch arm movable upon actuation to any one contact in the array thereof.
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) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |