Patent US2297506A successfully refreshed from Google Patents.
Patent US3686450A successfully refreshed from Google Patents.
US3686450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interval timing mechanism with improved cam and cam follower structure
Assignee: HOUSEHOLD INTERNATIONAL Inc A CORP OF DELAWARE
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Filing: 1971-03-03
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Granted: 1972-08-22
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Expires: 1991-03-03
Abstract
Abstract A timing device including a switch for automatically controlling the energizing time of an appliance. The timing device includes a rotor disc having a face which defines a predetermined cam profile. Rotary motion of the rotor disc in response to a motive device, provides axial motion of a cam follower for operating the switch.
Inventors
- 👤 Thomas G Willis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:29
CPC Classifications
G; G04; G04C; G04C23/00; G04C23/14; G04C23/16; H; H01; H01H; H01H19/00; H01H19/54; H01H19/60; H01H19/63
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
333 words
A timing device, comprising: a stator structure, a rotor disc mounted for rotation about an axis relative to said stator structure, a control shaft disposed to control the angular position of said rotor disc, a predetermined continuous portion on a face of said rotor disc defining a first arcuate path including a predetermined cam profile spaced from said face and extending arcuately from one end of said first arcuate path, and further defining a second arcuate path extending between said one end and the other end of said first arcuate path, a rotating motive means having a regular rate of rotation, a switch operable between open and closed conditions, means for actuating said switch including a cam follower biased against the predetermined face portion of said rotor disc, said cam follower being oriented to be responsive to the face portion and to the cam profile thereon such that when positioned at said one end of said first arcuate path said switch is placed in one of said conditions and when positioned along said second arcuate path said switch is placed in the other of said conditions, and means selectively coupling and decoupling said motive means to said rotor disc in response to the rotational positions of said rotor disc, wherein said motive means is coupled to said rotor disc when said cam follower is located against said second arcuate path so as to rotate said rotor disc and drive said one end of said first arcuate path directly toward said cam follower and wherein said motive means is decoupled from said rotor disc when said cam follower is located against said one end of said first arcuate path, whereby said control shaft is positionable to set said rotor disc so that when said cam follower is located on said second arcuate path at variable arcuate distances from said one end of said first arcuate path corresponding variable time intervals are established for actuating said switch from said one condition to said other condition.
Claim 2
Dependent Claim
333 words
A timing device, comprising: a stator structure, a rotor disc mounted for rotation about an axis relative to said stator structure, a control shaft disposed to control the angular position of said rotor disc, a predetermined continuous portion on a face of said rotor disc defining a first arcuate path including a predetermined cam profile spaced from said face and extending arcuately from one end of said first arcuate path, and further defining a second arcuate path extending between said one end and the other end of said first arcuate path, a rotating motive means having a regular rate of rotation, a switch operable between open and closed conditions, means for actuating said switch including a cam follower biased against the predetermined face portion of said rotor disc, said cam follower being oriented to be responsive to the face portion and to the cam profile thereon such that when positioned at said one end of said first arcuate path said switch is placed in one of said conditions and when positioned along said second arcuate path said switch is placed in the other of said conditions, and means selectively coupling and decoupling said motive means to said rotor disc in response to the rotational positions of said rotor disc, wherein said motive means is coupled to said rotor disc when said cam follower is located against said second arcuate path so as to rotate said rotor disc and drive said one end of said first arcuate path directly toward said cam follower and wherein said motive means is decoupled from said rotor disc when said cam follower is located against said one end of said first arcuate path, whereby said control shaft is positionable to set said rotor disc so that when said cam follower is located on said second arcuate path at variable arcuate distances from said one end of said first arcuate path corresponding variable time intervals are established for actuating said switch from said one condition to said other condition.
Claim 3
Dependent Claim
61 words
The timing device of claim 1 wherein the rotor disc includes a mutilated gear, and the selective coupling and decoupling means includes an idler gear disposed to engage the teeth of the mutilated gear when the mutilated gear is set between two predetermined angular positions corresponding to the location of said cam follower at opposite ends of said second arcuate path.
Claim 4
Dependent Claim
50 words
The timing device of claim 2 including means yieldably biasing said idler gear toward the mutilated gear for enabling the teeth of the idler gear and mutilated gear to demesh when the control shaft is actuated to rotate the mutilated gear to a position intermediate said two predetermined angular positions.
Claim 5
Dependent Claim
133 words
The timing device of claim 1 wherein the face of the rotor disc includes a further predetermined continuous portion with the latter and first named predetermined face portions being concentric to each other with the latter face portion having first and second arcuate paths corresponding to said first and second arcuate paths of the first named face portion, and wherein first and second depressions disposed on opposite sides of the axis form the cam profiles said first arcuate paths of each predetermined face portion, with the first and second depressions being on first and second differeNt radii relative to the axis, respectively, and the cam follower includes first and second spaced members, oriented to contact each of the predetermined face portions of the rotor disc at said first and second different radii, respectively.
Claim 6
Dependent Claim
56 words
The timing device of claim 1 wherein the means for actuating the switch includes a lever mechanism pivotally mounted to the stator structure, and means biasing the lever mechanism in a predetermined direction about its pivot point such that the lever mechanism pivots in response to the cam follower and cam profile on the rotor disc.
Claim 7
Dependent Claim
107 words
The timing device of claim 1 wherein the motive means includes a start member mounted for rotation about an axis relative to the stator structure intermediate said motive means and the selective coupling and decoupling means which has a first axial position effective to disconnect said motive means from the selective coupling and decoupling means and upon approaching a preselected interval starting time the motive means is effectively decoupled from the rotor disc, and said start member having a second axial position in response to arrival at said preselected starting time, which position is effective to enable the rotor disc to be coupled with the motive means.
Claim 8
Dependent Claim
67 words
The timing device of claim 6 wherein the rotor disc is a mutilated gear and the motive means includes an idler gear disposed to couple the start member and the mutilated gear, and said device includes means yieldably biasing said idler gear toward said mutilated gear for enabling the idler gear and mutilated gear to demesh while the angular position of the mutilated gear is being changed.
Claim 9
Dependent Claim
43 words
The timing device of claim 6 wherein the means for actuating the switch includes a lever mechanism pivotally mounted relative to the stator structure, with the cam follower and the start member being disposed to actuate said lever mechanism from opposite ends thereof.
Claim 10
Dependent Claim
58 words
The timing device of claim 3 wherein said other end of said first arcuate path is coextensive with said face of said face of said rotor disc such that when said cam follower is located on said other end said switch is placed in the other of said conditions while the idler gear and mutilated gear are demeshed.
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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) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |