Patent US4002292A successfully refreshed from Google Patents.
US4002292A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Timing device for thermostatic-control units
Assignee: Individual
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Filing: 1975-08-25
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Granted: 1977-01-11
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Expires: 1995-08-25
Abstract
Abstract A timing device in combination with a thermostatic control whereby heating units of the type used for heating structures such as buildings can be automatically turned off during predetermined periods, as when such buildings are unoccupied, the device comprising a clock-like motor coupled to a plurality of cam discs adjustable about the output shaft of the clock mechanism, the cams including cam heads to operate control switches engaging therewith.
Inventors
- 👤 James G. Parks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:09
CPC Classifications
G; G04; G04C; G04C23/00; G04C23/14; G04C23/18; H; H01; H01H; H01H43/00; H01H43/10; H01H43/12; H01H43/125; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2101; Y10T74/2102; Y10T74/2106
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
210 words
A timing device for thermostatic- controlled heating units wherein the combination thereof comprises: a clock mechanism having an output shaft projecting therefrom; a threaded, support bushing removably mounted to said output shaft and having a flat-keyed portion formed thereon; a plurality of cam plates arranged to be selectively positioned on said bushing, said plates having at least one radially-projecting, cam head integrally formed thereon and a central opening disposed therein; a timing plate positioned to be superposed over said cam plates whereby said cam plates are selectively positioned relative to said timing plate, wherein said timing plate includes a central aperture having a keyed, flat side to correspond to said keyed portion of said bushing, whereby rotation on said bushing is prevented thereby; means for securing said plates to said bushing; a timing-switch means arranged to be activated by said cam heads at predetermined intervals; power means removably connected to said clock mechanism for the operation thereof; a first temperature-control-switch means electrically connected to said timing-switch means, said first temperature-control switch being operated by a selective, ambient, temperature range; and a second temperature-control-switch means electrically connected to said heating unit and being selectively operative within a lower predetermined temperature range than the selective temperature range of said first temperature-control-switch means.
Claim 2
Dependent Claim
210 words
A timing device for thermostatic- controlled heating units wherein the combination thereof comprises: a clock mechanism having an output shaft projecting therefrom; a threaded, support bushing removably mounted to said output shaft and having a flat-keyed portion formed thereon; a plurality of cam plates arranged to be selectively positioned on said bushing, said plates having at least one radially-projecting, cam head integrally formed thereon and a central opening disposed therein; a timing plate positioned to be superposed over said cam plates whereby said cam plates are selectively positioned relative to said timing plate, wherein said timing plate includes a central aperture having a keyed, flat side to correspond to said keyed portion of said bushing, whereby rotation on said bushing is prevented thereby; means for securing said plates to said bushing; a timing-switch means arranged to be activated by said cam heads at predetermined intervals; power means removably connected to said clock mechanism for the operation thereof; a first temperature-control-switch means electrically connected to said timing-switch means, said first temperature-control switch being operated by a selective, ambient, temperature range; and a second temperature-control-switch means electrically connected to said heating unit and being selectively operative within a lower predetermined temperature range than the selective temperature range of said first temperature-control-switch means.
Claim 3
Dependent Claim
54 words
A timing device for thermostatic-control units as recited in claim 1, wherein said means for securing said plates includes: a spring washer whereby tension is constantly applied to said cam plates; a lock nut threadably received on said bushing, whereby said plates are secured thereon; and a cap nut superposed over said lock nut.
Claim 4
Dependent Claim
15 words
A timing device as recited in claim 2, wherein said timing switch comprises a micro-switch.
Claim 5
Dependent Claim
65 words
A timing device as recited in claim 2, wherein said timing switch comprises: a spring-biased arm member having one end thereof fixed and the opposite end free; a magnet attached to said free end of said arm member; a cam roller attached to said arm for engagement with said cam plate and head thereof; and a reed switch arranged to be activated by said magnet.
Claim 6
Dependent Claim
45 words
A timing device as recited in claim 2, wherein said first temperature-control-switch means operates in an ambient temperature range higher than that of the selective operating range of said second temperature-control means, whereby the low and high ranges of the ambient temperature are pre-selected thereby.
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) | 1980-01-11 | 1980-07-12 | 1981-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-11 | 1984-07-12 | 1985-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-11 | 1988-07-12 | 1989-01-11 | $7700.00 | Window Closed / Lapsed |