US3737606A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manual reset device with indicating means
Assignee: Emerson Electric Co
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Filing: 1971-12-07
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Granted: 1973-06-05
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Expires: 1991-12-07
Abstract
Abstract An indicating reset device for moving a safety cutoff switch or valve from its tripped or cutoff position toward which it is biased to an operative set position, the device having a slidably mounted plunger biased in one direction to an indicating position and operative when pushed oppositely to a non-indicating position to move a safety switch or valve to its set position, the device further including means for latching the plunger in its nonindicating position, the latching means being released by the biasing force of the safety switch or valve when an unsafe operating condition causes it to be tripped, and the plunger member having a conspicuously colored end portion which is retracted from view when in a non-indicating position and exposed when released to an indicating position.
Inventors
- 👤 E Becker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:53
CPC Classifications
H; H01; H01H; H01H37/00; H01H37/02; H01H37/64; H01H37/70; H01H9/00; H01H9/16; H01H71/00; H01H71/10; H01H71/50; H01H71/505; H01H2071/506
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
187 words
An indicating manual reset device comprising an elongated support member having an axial bore therethrough, a plunger longer than said support member axially slidable therein, means biasing said plunger in one direction to an indicating position wherein one end portion thereof projects from one end of said support member, stop means limiting plunger movement in said one direction, the other end of said plunger projects from the other end of said support member and is adapted to engage and move a control device from a biased released position to a set position when said one end portion thereof is manually depressed to a nonindicating position substantially flush with said one end of said support member, latch means operative to retain said plunger in said non-indicating position when it is moved there, said latch means including a rod member axially slidable in said plunger, said rod member being axially biased in a latching position wherein an end portion thereof projects beyond said other end of said plunger, and said latch means being tripped when said rod member is moved axially inward a short distance from said projected position.
Claim 2
Dependent Claim
187 words
An indicating manual reset device comprising an elongated support member having an axial bore therethrough, a plunger longer than said support member axially slidable therein, means biasing said plunger in one direction to an indicating position wherein one end portion thereof projects from one end of said support member, stop means limiting plunger movement in said one direction, the other end of said plunger projects from the other end of said support member and is adapted to engage and move a control device from a biased released position to a set position when said one end portion thereof is manually depressed to a nonindicating position substantially flush with said one end of said support member, latch means operative to retain said plunger in said non-indicating position when it is moved there, said latch means including a rod member axially slidable in said plunger, said rod member being axially biased in a latching position wherein an end portion thereof projects beyond said other end of said plunger, and said latch means being tripped when said rod member is moved axially inward a short distance from said projected position.
Claim 3
Dependent Claim
51 words
The device claimed in claim 1 in which said latch means further includes radially movable elements moved radially by said rod member to latching positions between opposing surfaces on said support member and said plunger when said rod member is moved to a latching position, thereby to preclude their relative movement.
Claim 4
Dependent Claim
34 words
The device claimed in claim 2 in which said rod member includes an axially inclined surface engaging said radially movable elements and in which said opposing surface on said support member is axially inclined.
Claim 5
Dependent Claim
39 words
The device claimed in claim 3 in which said opposing surface on said support member comprises a bevelled annular shoulder formed in its axial bore and in which said elements are slidable in a transverse bore through said plunger.
Claim 6
Dependent Claim
33 words
The device claimed in claim 4 in which said elements comprise a plurality of balls in said transverse bore in said plunger between said operating rod and the wall of said support member.
Claim 7
Dependent Claim
63 words
The device claimed in claim 1 in which said elongated support member is of hollow cylindrical form, is provided with an internal screw-threaded end portion, and includes a centrally perforated and headed screw-threaded plug, which plug provides means for mounting the device in a perforated casing wall, retains said plunger member therein, and slidably guides said smaller diameter other end of said plunger.
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) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |