Patent US4742321A successfully refreshed from Google Patents.
US4742321A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molded case circuit breaker with accessory functions
Assignee: General Electric Co
•
Filing: 1987-06-25
•
Granted: 1988-05-03
•
Expires: 2007-06-25
Abstract
Abstract A molded case circuit breaker includes accessory functions such as an auxiliary switch and a shunt trip device mounted within the circuit breaker cover. A stain relief assembly interfaces the accessory wires with the circuit breaker case and cover. The strain relief fixture prevents inadvertent or intentional displacement of the wires from the accessory devices.
Inventors
- 👤 Joseph G. Nagy
- 👤 Richard E. Bernier
- 👤 Gregory T. DiVincenzo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:58
CPC Classifications
H; H01; H01H; H01H71/00; H01H71/02; H01H71/0207; H01H71/0228; H01H71/08; H01H2071/086
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
123 words
A circuit breaker and accessory unit comprising: a molded plastic case and cover; a pair of separable contacts within said case; an operating mechanism within said case arranged for separating said contacts upon occurrence of an overload condition through said contacts; a circuit breaker accessory mounted within said cover and arranged for separating said contacts upon command; a wire conductor connecting with said accessory and passing outside said case and cover for providing external electrical access to said accessory; and a strain relief wire support within said case intermediate said accessory and said case for preventing damage to said accessory when tensile force is applied to said wire conductor said strain relief wire support comprising a planar member having a V-shaped groove therein.
Claim 2
Dependent Claim
123 words
A circuit breaker and accessory unit comprising: a molded plastic case and cover; a pair of separable contacts within said case; an operating mechanism within said case arranged for separating said contacts upon occurrence of an overload condition through said contacts; a circuit breaker accessory mounted within said cover and arranged for separating said contacts upon command; a wire conductor connecting with said accessory and passing outside said case and cover for providing external electrical access to said accessory; and a strain relief wire support within said case intermediate said accessory and said case for preventing damage to said accessory when tensile force is applied to said wire conductor said strain relief wire support comprising a planar member having a V-shaped groove therein.
Claim 3
Dependent Claim
17 words
The circuit breaker and accessory of claim 1 wherein said wire conductor is arranged within said groove.
Claim 4
Dependent Claim
23 words
The circuit breaker and accessory of claim 1 wherein said accessory comprises a shunt trip device supported between pair of side support frames.
Claim 5
Dependent Claim
24 words
The circuit breaker and accessory unit of claim 3 wherein said strain relief wire support is attached to one of said side support frames.
Claim 6
Dependent Claim
24 words
The circuit breaker and accessory unit of claim 1 wherein said accessory comprises a remote switch supported between a pair of side support frames.
Claim 7
Dependent Claim
24 words
The circuit breaker and accessory unit of claim 5 wherein said remote switch strain relief wire support comprises one of said side support frames.
Claim 8
Dependent Claim
31 words
The circuit breaker and accessory unit of claim 6 wherein said remote switch strain relief wire support comprises a V-shaped groove formed on a top surface of said one side support.
Claim 9
Dependent Claim
24 words
The circuit breaker and accessory unit of claim 5 wherein said one support frame includes an access slot for passage of said wire conductor.
Claim 10
Dependent Claim
106 words
A flux shifter circuit breaker accessory comprising: a pair of support side frames; an apertured solenoid intermediate said support frame; an armature slidably arranged within said solenoid for becoming extended in response to electric signals applied to said solenoid; a wire support member attached to one of said support frames, a top of one of said support frames being slotted; and a pair of led wires attached to said solenoid at one end thereof and arranged within said slots proximate said one end, whereby any force applied to an opposite end causes said lead wires to move downwards within said slots said slots comprising V-shaped grooves.
Claim 11
Dependent Claim
106 words
A flux shifter circuit breaker accessory comprising: a pair of support side frames; an apertured solenoid intermediate said support frame; an armature slidably arranged within said solenoid for becoming extended in response to electric signals applied to said solenoid; a wire support member attached to one of said support frames, a top of one of said support frames being slotted; and a pair of led wires attached to said solenoid at one end thereof and arranged within said slots proximate said one end, whereby any force applied to an opposite end causes said lead wires to move downwards within said slots said slots comprising V-shaped grooves.
Claim 12
Dependent Claim
79 words
An auxiliary switch circuit breaker accessory comprising: a pair of opposing side frames; an electric switch intermediate said side frames and attached thereto; and a pair of lead wires attached to said electric switch at one end and extending within slots formed within a top surface of one of said side frames proximate said one end, whereby any force applied to an opposite end causes said lead wires to move downwards within said slots said slots comprising V-shaped grooves.
Claim 13
Dependent Claim
79 words
An auxiliary switch circuit breaker accessory comprising: a pair of opposing side frames; an electric switch intermediate said side frames and attached thereto; and a pair of lead wires attached to said electric switch at one end and extending within slots formed within a top surface of one of said side frames proximate said one end, whereby any force applied to an opposite end causes said lead wires to move downwards within said slots said slots comprising V-shaped grooves.
Claim 14
Dependent Claim
26 words
The auxiliary switch of claim 10 further including a pair of rollers, said lead wires being arranged between said rollers, intermediate said slots and said switch.
References Cited (Backward Citations)
US3720892A
Cited
US4297663A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-03 | 1991-11-02 | 1992-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-03 | 1995-11-02 | 1996-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-03 | 1999-11-02 | 2000-05-03 | $7700.00 | Window Closed / Lapsed |