US3700839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Watthour meter indicator with improved cam and microswitch operator structure
Assignee: Sangamo Electric Co
•
Filing: 1971-06-28
•
Granted: 1972-10-24
•
Expires: 1991-06-28
Abstract
Abstract An arrangement for effecting snap-action transfer of a switch between first and second switch conditions in response to movement of a slowly rotating control cam. The switch has a pair of actuating arms secured thereto one of which is movable to effect snap-action transfer of the switch from a first to a second switch condition in response to movement of the control cam, the other of arms being movable to effect snap-action transfer of the switch from the second back to the first switch condition in response to further movement of the control cam.
Inventors
- 👤 Donald A Eggleston
- 👤 Trevor N Samuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:52
CPC Classifications
H; H01; H01H; H01H19/00; H01H19/54; H01H19/60; H01H19/62; G; G01; G01R; G01R11/00; G01R11/02; H01H3/00; H01H3/02; H01H3/0253
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
184 words
In combination with a meter device having a mounting plate and at least one rotatable recording shaft; at least one switch means transferable between first and second switch contact conditions and including a switch body pivotally supported by the mounting plate, first actuator arm means pivotally supported by said switch body and movable to effect transfer of said switch between its said first and second switch conditions, second actuator arm means fixedly secured to said switch body and movable therewith, and control means rotatably movable with the recording shaft and engaging said first and second actuator arm means to move said actuator arm means to positions establishing said first switch contact condition during rotation of the recording shaft, said control means thereafter effecting a snapaction movement of one of said actuator arm means to transfer the switch to said second switch contact condition during continued rotation of the recording shaft, and said control means thereafter effecting a snap-action movement of the other of said actuator arm means to transfer the switch bAck to said first contact condition during continued rotation of the recording shaft.
Claim 2
Dependent Claim
184 words
In combination with a meter device having a mounting plate and at least one rotatable recording shaft; at least one switch means transferable between first and second switch contact conditions and including a switch body pivotally supported by the mounting plate, first actuator arm means pivotally supported by said switch body and movable to effect transfer of said switch between its said first and second switch conditions, second actuator arm means fixedly secured to said switch body and movable therewith, and control means rotatably movable with the recording shaft and engaging said first and second actuator arm means to move said actuator arm means to positions establishing said first switch contact condition during rotation of the recording shaft, said control means thereafter effecting a snapaction movement of one of said actuator arm means to transfer the switch to said second switch contact condition during continued rotation of the recording shaft, and said control means thereafter effecting a snap-action movement of the other of said actuator arm means to transfer the switch bAck to said first contact condition during continued rotation of the recording shaft.
Claim 3
Dependent Claim
25 words
The combination of claim 1 including means biasing said first actuating arm means to a position establishing one of said first and second switch conditions.
Claim 4
Dependent Claim
48 words
The combination of claim 1 wherein said control means comprises cam means mounted on the recording shaft for rotation therewith, said cam means having actuating lobes engageable with said first and second actuating arm means to effect said snap-action movement of said first and second actuating arm means.
Claim 5
Dependent Claim
38 words
The combination of claim 3 wherein said cam means includes a plurality of circumferentially spaced actuating lobes to effect sequential transfer of said switch between its first and second switch contact conditions during rotation of said cam means.
Claim 6
Dependent Claim
56 words
The combination of claim 3 wherein said cam means comprises a pair of axially aligned cam members each of which is cooperative with one of said first and second actuator arm means, each of said cam members having at least one actuating lobe thereon adapted to effect said snap-action movement of the associated actuator arm means.
Claim 7
Dependent Claim
105 words
The combination of claim 1 wherein said control means is engageable with said first and second actuator arm means to simultaneously move both of the actuator arm means to positions establishing one of said first and second switch conditions, thereafter effect snap-action movement of one of said actuator arm means to a position transferring said switch to the other of its switch conditions, and thereafter effect snap-action movement of the other of said actuator arm means to a position transferring said switch back to its initial switch condition, said snap-action movement of said actuator arm means being sequentially effected during rotation of the recording shaft.
Claim 8
Dependent Claim
42 words
The combination of claim 1 wherein said switch body is supported for pivotal movement about an axis off-set from the center of gravity of the switch body so that said second actuator arm means is urged against said control means by gravity.
Claim 9
Dependent Claim
170 words
In a switch actuating system for use with a switch having a switch body, two fixed spaced contacts, and a contact arm movable between the fixed contacts to selectively establish first and second switch conditions, the combination comprising means supporting the switch body for pivotal movement, first actuator arm means pivotally supported by the switch body and movable to effect transfer of the contact arm between its first and second switch conditions, second actuator arm means secured to the switch body and movable therewith, and movable control means engaging said first and second actuator arm means to move said actuator arm means to positions establishing said first switch condition, said control means during continued movement thereof effecting a snap-action movement of one of said actuator arm means to transfer the contact arm to establish said second switch condition, and said control means during further movement thereof effecting a snap-action movement of the other of said switch actuator arm means to transfer the contact arm back to its first switch condition.
Claim 10
Dependent Claim
170 words
In a switch actuating system for use with a switch having a switch body, two fixed spaced contacts, and a contact arm movable between the fixed contacts to selectively establish first and second switch conditions, the combination comprising means supporting the switch body for pivotal movement, first actuator arm means pivotally supported by the switch body and movable to effect transfer of the contact arm between its first and second switch conditions, second actuator arm means secured to the switch body and movable therewith, and movable control means engaging said first and second actuator arm means to move said actuator arm means to positions establishing said first switch condition, said control means during continued movement thereof effecting a snap-action movement of one of said actuator arm means to transfer the contact arm to establish said second switch condition, and said control means during further movement thereof effecting a snap-action movement of the other of said switch actuator arm means to transfer the contact arm back to its first switch condition.
Claim 11
Dependent Claim
21 words
The combination of claim 8 including means biasing said first actuator arm means to a position establishing a pre-determined switch condition.
Claim 12
Dependent Claim
34 words
The combination of claim 8 wherein said control means comprises rotatable cam means having at least one actuating lobe thereon cooperative with each of said actuating arm means to establish said snap-action movement thereof.
Claim 13
Dependent Claim
32 words
The combination of claim 10 wherein said cam means comprises at least two axially aligned cam members each of which is cooperative with one of said first and second actuating arm means.
Claim 14
Dependent Claim
22 words
The combination of claim 11 wherein said cam members are formed integral with each other and are rotatable about a common axis.
References Cited (Backward Citations)
US2081295A
Cited
US2844670A
Cited
US2997565A
Cited
US3094602A
Cited
US3182150A
Cited
US3306997A
Cited
US3352987A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |