US3875736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous cam clock
Assignee: Individual
•
Filing: 1974-08-20
•
Granted: 1975-04-08
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Expires: 1994-08-20
Abstract
Abstract A continuous cam clock is provided in which a cylindrical tube is vertically supported on a base and rotated once an hour to display time in minutes, and a cylinder is positioned within the tube to rise slowly to display the hour as the tube rotates by the interaction between a continuous cam on the inside of the tube, and a pivotally mounted elongated follower carried by the cylinder.
Inventors
- 👤 Arnold G Gulko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:09
CPC Classifications
G; G04; G04C; G04C3/00; G04C3/14; G04B; G04B19/00; G04B19/20; G04B19/21
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
119 words
A clock comprising a base, a cylindrical tube supported on said base with the axis of said tube being perpendicular to the base, means to rotate said tube, once an hour, a cylinder positioned within said tube and free for vertical movement therein, means mounted in said base for preventing rotation of said cylinder, a continuous cam on the interior of said tube and an elongated follower pivotally carried by said cylinder, said follower extending into said continuous cam whereby, upon rotation of said tube, said cylinder will rise one unit per hour so that the vertical position of the cylinder will identify the hour, and the rotational position of the tube will identify the minute of the hour.
Claim 2
Dependent Claim
119 words
A clock comprising a base, a cylindrical tube supported on said base with the axis of said tube being perpendicular to the base, means to rotate said tube, once an hour, a cylinder positioned within said tube and free for vertical movement therein, means mounted in said base for preventing rotation of said cylinder, a continuous cam on the interior of said tube and an elongated follower pivotally carried by said cylinder, said follower extending into said continuous cam whereby, upon rotation of said tube, said cylinder will rise one unit per hour so that the vertical position of the cylinder will identify the hour, and the rotational position of the tube will identify the minute of the hour.
Claim 3
Dependent Claim
37 words
A clock as recited in claim 1 in which said cylinder is formed with an axial rectangular slot and a bar is mounted on said base to extend through said slot to prevent rotation of said cylinder.
Claim 4
Dependent Claim
39 words
A clock as recited in claim 1 in which said continuous cam is formed as a helix with twelve horizontal flights which are crossed by a vertical portion through which said follower falls to permit said cylinder to descend.
Claim 5
Dependent Claim
30 words
A clock as recited in claim 1 in which a pointer serves to identify the minute of the hour and also to hold said tube in place as it rotates.
References Cited (Backward Citations)
US3593515A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |