US3755772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanical interlock for electric circuit
Assignee: Individual
•
Filing: 1972-08-16
•
Granted: 1973-08-28
•
Expires: 1992-08-16
Abstract
Abstract A mechanical interlock for components in an electric circuit necessitating a mechanical separation of mating parts which interrupts the electric circuit before access thereto or components thereof is possible, thereby preventing electric shocks to users.
Inventors
- 👤 D Reed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:08
CPC Classifications
H; H01; H01R; H01R13/00; H01R13/66; H01R13/70; H01R13/707; Y; Y10; Y10S; Y10S439/00; Y10S439/911
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
160 words
A mechanical interlock for an electric circuit comprising: A. a plug connected to a first section of said circuit; B. a receptacle connecteD to a second section of said circuit adapted for coupling with said plug; C. a receptacle cover encompassing said receptacle and including: i. an elongate handle extending longitudinally exteriorly thereof; D. a locking stem and holder connected to said plug and extending longitudinally exteriorly thereof; E. said handle and said locking stem having coacting and mating free end portions adapted for locking interengagement upon longitudinal movement of said receptacle cover and said plug with respect to one another to lock said plug and said receptacle against displacement and disengagement. F. a circuit component compartment connected in said first section, an access opening to said compartment, a detachable access cover on said access opening, said locking stem being attached to said access cover and preventing removal thereof when said locking stem and said handle are in locking interengagement.
Claim 2
Dependent Claim
160 words
A mechanical interlock for an electric circuit comprising: A. a plug connected to a first section of said circuit; B. a receptacle connecteD to a second section of said circuit adapted for coupling with said plug; C. a receptacle cover encompassing said receptacle and including: i. an elongate handle extending longitudinally exteriorly thereof; D. a locking stem and holder connected to said plug and extending longitudinally exteriorly thereof; E. said handle and said locking stem having coacting and mating free end portions adapted for locking interengagement upon longitudinal movement of said receptacle cover and said plug with respect to one another to lock said plug and said receptacle against displacement and disengagement. F. a circuit component compartment connected in said first section, an access opening to said compartment, a detachable access cover on said access opening, said locking stem being attached to said access cover and preventing removal thereof when said locking stem and said handle are in locking interengagement.
Claim 3
Dependent Claim
30 words
A mechanical interlock as claimed in claim 1, said access cover being screw threadedly engaged with said compartment and rotation thereof for removal being prevented by said attached locking stem.
Claim 4
Dependent Claim
18 words
A mechanical interlock as claimed in claim 2, said locking stem being detachably connected to said access cover.
Claim 5
Dependent Claim
51 words
A mechanical interlock as claimed in claim 1, said locking stem having an elongated slot in the free end thereof, said handle having a laterally extended ear thereon, said ear being slidable within said slot upon said longitudinal movement of said receptacle cover and said plug and lockingly interengaging the members.
Claim 6
Dependent Claim
24 words
A mechanical interlock as claimed in claim 4, said ear having an aperture therethrough, said aperture being adapted for engagement by a removable lock.
Claim 7
Dependent Claim
48 words
A mechanical interlock as claimed in claim 5, the free end of said locking stem having a slotted transversely extending lug, said ear being slidable through the slot in said lug and prevented from removal when a said lock is operatively engaged in said aperture in said ear.
Claim 8
Dependent Claim
16 words
A mechanical interlock as claimed in claim 6, wherein said component compartment comprises a fuse box.
Claim 9
Dependent Claim
19 words
A mechanical interlock as claimed in claim 6, wherein said component compartment comprises a control box for said circuit.
Claim 10
Dependent Claim
21 words
A mechanical interlock as claimed in claim 6, including a removable end cap for said receptacle and screw threadedly engageable therewith.
References Cited (Backward Citations)
US1549437A
Cited
FR695256A
Cited
US2384267A
Cited
US2700141A
Cited
US2782391A
Cited
US3052863A
Cited
US3633150A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |