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.
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.