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US3903684A Expired / Lapsed US ⏱️ 0.0 years remaining

Pendulum timer

Assignee: Individual
•
Filing: 1973-05-04
•
Granted: 1975-09-09
•
Expires: 1993-05-04
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Abstract

Abstract An interval timer which includes a pendulum having a bob that is supported for oscillatory movement. A closure member, which is magnetically attracted to the bob, is positioned beneath the rest point of the bob. The closure member is movable from a closed to an open position by the magnetic attraction between the bob and closure member with the bob at its rest position. Signal means are actuatable by the movement of the closure member to its open position. Thus, a signal is given when the bob comes to rest through movement of the closure member by the magnetic attraction between the bob and closure member. The interval timer may also include a ball receiver having a passage for receipt of a non-magnetic ball. The closure member may block the passage through the ball receiver when the closure member is in its closed position. A pan may be positioned adjacent the passage to receive the non-magnetic ball from the passage when the closure member is moved to its open position, with the pan emitting an audible signal on receipt of the ball from the passage.

Inventors

  • 👤 Allen Wilson

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 18:03
CPC Classifications
G; G04; G04F; G04F1/00; G04B; G04B17/00; G04B17/02

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 111 words
An interval timer comprising: a pendulum including a bob supported for oscillatory movement about a fixed point; a closure member which is magnetically attracted to said bob; said closure member being positioned beneath the rest point of the bob; and said closure member being movable from a closed to an open position by the magnetic attraction between the bob and closure member when the bob is in its rest position, and signal means actuatable by movement of the closure member to its open position, whereby a signal is given when the bob has come to rest through movement of the closure member by magnetic attraction between the bob and closure member.
Claim 2
Dependent Claim 111 words
An interval timer comprising: a pendulum including a bob supported for oscillatory movement about a fixed point; a closure member which is magnetically attracted to said bob; said closure member being positioned beneath the rest point of the bob; and said closure member being movable from a closed to an open position by the magnetic attraction between the bob and closure member when the bob is in its rest position, and signal means actuatable by movement of the closure member to its open position, whereby a signal is given when the bob has come to rest through movement of the closure member by magnetic attraction between the bob and closure member.
Claim 3
Dependent Claim 13 words
The interval timer of claim 1 wherein the bob includes a permanent magnet.
Claim 4
Dependent Claim 30 words
The interval timer of claim 2 wherein said closure member includes a permanent magnet with poles positioned in attractive relation to the poles of the permanent magnet in the bob.
Claim 5
Dependent Claim 15 words
The interval timer of claim 1 including means to vary the period of the pendulum.
Claim 6
Dependent Claim 79 words
The interval timer of claim 1 including: a ball receiver having a passage for receipt of a non-magnetic ball; said closure member being positioned to block said passage when the closure member is in its closed position; a pan positioned adjacent the passage to receive a non-magnetic ball from the passage when the closure member is moved to its open position, and the pan being constructed to emit an audible signal on receipt of a ball from said passage.
Claim 7
Dependent Claim 13 words
The interval timer of claim 5 wherein the bob includes a permanent magnet.
Claim 8
Dependent Claim 30 words
The interval timer of claim 6 wherein said closure member includes a permanent magnet with poles positioned in attractive relation to the poles of the permanent magnet in the bob.
Claim 9
Dependent Claim 24 words
The interval timer of claim 4 wHerein the means to vary the period of the pendulum includes an adjustable support member for the pendulum.
Claim 10
Dependent Claim 15 words
The interval timer of claim 7 including means to vary the period of the pendulum.

References Cited (Backward Citations)

US2107673A Cited
US2220049A Cited
US3672149A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-09-08 1979-03-10 1979-09-09 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-09-08 1983-03-10 1983-09-09 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-09-08 1987-03-10 1987-09-09 $7700.00 Window Closed / Lapsed

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