US3585334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Position indicating electrical switch unit
Assignee: Westport Development and Manufacturing Co Inc
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Filing: 1969-12-22
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Granted: 1971-06-15
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Expires: 1989-12-22
Abstract
Abstract A mechanically operated switch unit having an electrical snap action switch in which the switching is effected in an hermetically sealed atmosphere but yet the unit has a removable cover to enable adjustment and/or repair in the field. The switch is protected from excessive movement which could destroy it by having the actuator movement structurally limited and by operating the switch inversely so that it is normally closed when not actuated, the latter also making the unit essentially free from vibration actuation.
Inventors
- 👤 Robert R Hellman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:03
CPC Classifications
H; H01; H01H; H01H13/00; H01H13/02; H01H13/04; H01H13/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
139 words
A position indicating electrical switch unit comprising a body formed to have a web extending between two spaced flanges, an electrical switch having an hermetically sealed case and an actuating arm extending therefrom with the actuating arm in one position causing closing of the switch and in another position causing opening of the switch, an electrical connector secured on one of the flanges, means electrically connecting the connector and the switch, means mounting the switch on the web between the flanges, switch actuating means supported by the body including a projecting portion extending outwardly from the other flange and an actuating arm engaging portion whereby movement of the projecting portion effects the shifting of the switch from one position to the other and a cover removably mounted on the body and covering at least said engaging portion and switch.
Claim 2
Dependent Claim
139 words
A position indicating electrical switch unit comprising a body formed to have a web extending between two spaced flanges, an electrical switch having an hermetically sealed case and an actuating arm extending therefrom with the actuating arm in one position causing closing of the switch and in another position causing opening of the switch, an electrical connector secured on one of the flanges, means electrically connecting the connector and the switch, means mounting the switch on the web between the flanges, switch actuating means supported by the body including a projecting portion extending outwardly from the other flange and an actuating arm engaging portion whereby movement of the projecting portion effects the shifting of the switch from one position to the other and a cover removably mounted on the body and covering at least said engaging portion and switch.
Claim 3
Dependent Claim
61 words
The invention as defined in claim 1 in which the actuating arm is biased to its open position and in which there are means for urging the switch actuating means to cause said switch to be at its closed position where said switch is normally maintained in the aBsence of forcible movement of the switch actuating means from its closed position.
Claim 4
Dependent Claim
67 words
The invention as defined in claim 2 in which the body includes a removable cap mounted on the other flange through which the projecting portion extends and is mounted for movement toward and away from the body and in which there are means for limiting the outward movement of the switch actuating means and hence the overtravel movement of the actuating arm by engagement with the cap.
Claim 5
Dependent Claim
25 words
The invention as defined in claim 3 in which there are means on said other flange for limiting inward movement of the switch actuating means.
Claim 6
Dependent Claim
57 words
The invention as defined in claim 3 in which the switch actuating means includes a rod positioned in an aperture formed in the web for longitudinal movement and having one end connected to arm engaging portion, connecting means being adjustable longitudinally of the rod to enable adjustment of the engaging portion with respect to the rod''s position.
Claim 7
Dependent Claim
53 words
The invention as defined in claim 5 in which the other end of the rod extends beyond the other flange, an abutment member secured on the other end of the rod and a surface formed on said flange for engaging the abutment member to limit the inward switch opening movement of the rod.
Claim 8
Dependent Claim
77 words
The invention as defined in claim 5 in which the other end of the rod extends beyond the other flange, an abutment member secured on the other end of the rod, spring means urging the abutment member and rod outwardly to a switch closing position, the projecting portion includes an inner portion within the cap engageable with the abutment member and in which the means for limiting the outward movement includes the inner portion engaging the cap.
Claim 9
Dependent Claim
37 words
The invention as defined in claim 7 in which the engagement between the inner portion and the abutment member includes a pair of surfaces with one surface being essentially flat and the other surface being essentially spherical.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |