US3899872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital timer and time indicator drums therefor
Assignee: Robertshaw Controls Co
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Filing: 1974-04-30
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Granted: 1975-08-19
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Expires: 1994-04-30
Abstract
Abstract A digital timer having a selector to set a selected period of time that the timer is to be operated by the drive motor for only that set period of time, the timer comprising a pair of indicator drums rotatably mounted to the timer frame by a shaft. The drums have a pinion gear disposed therebetween and operatively associated therewith so that one of the drums will cause incremental movement of the other drum in a timed relation to incremental movement of that one drum caused by a drive connection of that one drum to the timer motor.
Inventors
- 👤 Paul T Flumm
- 👤 Vernon B Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:04
CPC Classifications
G; G04; G04C; G04C23/00; G04C23/14; G04C23/16; G04F; G04F7/00; G04F7/04; G04F7/08; G04F7/0866; G04F7/0871
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
218 words
In combination, a frame means, shaft means carried by said frame means, and a pair of digital time indicating drums rotatably mounted to said frame means by said shaft means, said drums having means cooperating together so that one of said drums will cause incremental movement of the other drum in a timed relation to incremental movement of said one drum, said cooperating means comprising a pinion-like gear means rotatably mounted to said frame means intermediate said drums, said one drum having drive means operatively associated with said gear means to drive the same as said one drum is rotated, said other drum having driven means operatively associated with said gear means to be driven thereby in a timed relation to the incremental movement of said one drum, said one drum having driven means to be driven by drive means when interconnected thereto, said driven means of said one drum comprising a plurality of pins extending in a circular array from said one drum substantially parallel to the axis of rotation of said one drum, said drive means that drives said pins of said one drum comprising a gear rotatably mounted to said frame means to rotate about an axis substantially transverse to said axis of rotation of said one drum and meshing with certain of said pins.
Claim 2
Dependent Claim
218 words
In combination, a frame means, shaft means carried by said frame means, and a pair of digital time indicating drums rotatably mounted to said frame means by said shaft means, said drums having means cooperating together so that one of said drums will cause incremental movement of the other drum in a timed relation to incremental movement of said one drum, said cooperating means comprising a pinion-like gear means rotatably mounted to said frame means intermediate said drums, said one drum having drive means operatively associated with said gear means to drive the same as said one drum is rotated, said other drum having driven means operatively associated with said gear means to be driven thereby in a timed relation to the incremental movement of said one drum, said one drum having driven means to be driven by drive means when interconnected thereto, said driven means of said one drum comprising a plurality of pins extending in a circular array from said one drum substantially parallel to the axis of rotation of said one drum, said drive means that drives said pins of said one drum comprising a gear rotatably mounted to said frame means to rotate about an axis substantially transverse to said axis of rotation of said one drum and meshing with certain of said pins.
Claim 3
Dependent Claim
35 words
A combination as set forth in claim 1 wherein said drive means of said one drum comprises ring gear means carried by said one drum and disposed in meshing relation with said pinion gear means.
Claim 4
Dependent Claim
41 words
A combination as set forth in claim 1 wherein said driven means of said other drum comprises a plurality of pins extending in a circular array from said other drum substantially parallel to the axis of rotation of said other drum.
Claim 5
Dependent Claim
22 words
A combination as set forth in claim 1 wherein said shaft means comprises a single shaft carrying said drums in side-by-side relation.
Claim 6
Dependent Claim
37 words
A combination as set forth in claim 1 wherein another shaft means is carried by said frame means and another pair of digital time indicator drums are rotatably mounted to said frame means by said shaft means.
Claim 7
Dependent Claim
26 words
A combination as set forth in claim 5 wherein said other shaft means comprises a single shaft carrying said other pair of drums in side-by-side relation.
Claim 8
Dependent Claim
50 words
A combination as set forth in claim 5 wherein one of said drums of one of said pairs thereof indicates minutes from 0 to 9 in increments of ones and the other drum thereof indicates increments of hours in increments of 1''s and 10''s of minutes in increments of 10''s.
Claim 9
Dependent Claim
43 words
A combination as set forth in claim 5 wherein one of said drums of one of said pairs thereof indicates minutes from 0 to 55 in increments of 5 minutes and the other drum thereof indicates increments of hours in increments of 1''s.
Claim 10
Dependent Claim
19 words
A combination as set forth in claim 5 wherein said two pairs of drums are substantially identical in construction.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |