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US3736391A Expired / Lapsed US ⏱️ 0.0 years remaining

Timing device with adjustable cam operated microswitch assembly

Assignee: Individual
•
Filing: 1972-05-01
•
Granted: 1973-05-29
•
Expires: 1992-05-01
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Abstract

Abstract A timing disk has switch controlling members mounted in a circular series about its axis of rotation and independently rotatable about their axes to adjust the position of a pin projecting latterly from a radially outwardly extending arm on each controlling member. The movable contact of a micro-switch, biased toward a first position controlling a first motor for driving the disk, is movable into a second position controlling a second motor, driving the disk at a much slower speed than the first motor. A cam having an arcuate high portion is rotatable about an axis out of the pin path and has a finger movable with it projecting into this path to rotate the cam through an arc dependent on how long the pin contacts the finger. A switch operating member holds the movable contact in its second position as long as a follower engaging the operating member engages the cam high portion. A spring rotates the cam to engage its low portion with the follower upon disengagement of the pin from the finger. A contact moving with the disk successively engages a circular series of stationary contacts concentric with the disk, each corresponding to a controlling member and each in the circuit of a different electrically operated valve. A ring contact concentric with and rotating with the disk has a gap and cooperates with a stationary contact to open both motor circuits upon completion of a rotation of the disk.

Inventors

  • 👤 L Caviar

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 16:28
CPC Classifications
G; G04; G04C; G04C23/00; G04C23/14; G04C23/18; H; H01; H01H; H01H43/00; H01H43/02; H01H43/04; H01H43/06; H01H43/065

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 232 words
In a timer having a rotatable timing disk, a pair of motors alternately rotating said disk, each at a different speed, a switch having a pair of stationary contacts each in a circuit of one of said motors, and a movable contact biased toward a first position in engagement with only one of said stationary contacts and movable into a second position in engagement with only the other stationary contact, means for determining the position of said movable contact comprising controlling members mounted on said disk in a circular series, each for independent rotatable adjustment about its axis, a pin projecting from each of said controlling members in spaced relation to said controlling member axis, a cam mounted for rotation about a fixed axis out of the path of said pins, said cam having a high portion extending over the major portion thereof concentric with said fixed axis, a finger projecting from said cam into the path of said pins for engagement therewith, a cam follower, means biasing said cam toward a position with said follower engaging the low portion thereof, said cam having the high portion thereof in engagement with said follower during engagement of a pin with said finger, and a switch operating member engaged by said follower to move into and hold said movable contact in said second position during engagement of said cam high portion with said follower.
Claim 2
Dependent Claim 232 words
In a timer having a rotatable timing disk, a pair of motors alternately rotating said disk, each at a different speed, a switch having a pair of stationary contacts each in a circuit of one of said motors, and a movable contact biased toward a first position in engagement with only one of said stationary contacts and movable into a second position in engagement with only the other stationary contact, means for determining the position of said movable contact comprising controlling members mounted on said disk in a circular series, each for independent rotatable adjustment about its axis, a pin projecting from each of said controlling members in spaced relation to said controlling member axis, a cam mounted for rotation about a fixed axis out of the path of said pins, said cam having a high portion extending over the major portion thereof concentric with said fixed axis, a finger projecting from said cam into the path of said pins for engagement therewith, a cam follower, means biasing said cam toward a position with said follower engaging the low portion thereof, said cam having the high portion thereof in engagement with said follower during engagement of a pin with said finger, and a switch operating member engaged by said follower to move into and hold said movable contact in said second position during engagement of said cam high portion with said follower.
Claim 3
Dependent Claim 45 words
In the timer claimed in claim 1 providing said disk with a circular series of openings, said controlling members each mounted in one of said openings, each having a radially extending arm thereon and one of said pins projecting laterally from each of said arms.
Claim 4
Dependent Claim 70 words
In the timer claimed in claim 1 in which a conductor common to the circuits of both said motors has a switch interposed therein comprising a ring contact concentric with the axis of said disk having a gap therein mounted to move with said disk about said axis and a pair of stationary contacts engaged by said disk, one of said stationary contacts being in the path of said gap.
Claim 5
Dependent Claim 40 words
In the timer claimed in claim 1 said cam has a body portion rotatably mounted on a bearing and said finger is Ntegral with said body portion and projects radially with respect to the axis of rotation of said cam.
Claim 6
Dependent Claim 55 words
In the timer claimed in claim 1 said cam has a body portion rotatably mounted on a bearing and a stop member integral therewith, a fixed stop member in the path thereof and spring means tending to rotate said body portion in a direction to engage said integral stop member with said fixed stop member.
Claim 7
Dependent Claim 21 words
In the timer claimed in claim 1 in which the finger has a beveled end portion, providing a sharp edge thereon.

References Cited (Backward Citations)

US3227821A Cited
US3379894A Cited
US3359382A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-05-28 1976-11-27 1977-05-29 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-05-28 1980-11-27 1981-05-29 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-05-28 1984-11-27 1985-05-29 $7700.00 Window Closed / Lapsed

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