US3754107A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wall plug-in time switch
Assignee: TELECHRON Inc A CORP OF
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Filing: 1972-06-08
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Granted: 1973-08-21
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Expires: 1992-06-08
Abstract
Abstract A wall plug-in time switch wherein a pair of shouldered wall prongs are uniquely mounted in a housing of the time switch for connecting the time switch to a conventional wall mounted outlet box. The construction includes shoulders on the wall prongs which are sandwiched between bosses which are formed on a rear casing and a front cover of the time switch housing. Electrical outlet receptacle spring contacts are placed directly over the wall prongs, and terminals for an electric motor are also located in the vicinity of the wall prongs so that the wall prongs, receptacle spring contacts, and electric motor are reliably connected to each other and positioned within the housing with the use of relatively few parts.
Inventors
- 👤 C Balchunas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:26
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/22; H02K5/225; G; G04; G04C; G04C23/00; G04C23/02; G04C23/04; H01; H01R; H01R13/00; H01R13/66; H01R13/70
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
195 words
A wall plug-in switch mechanism comprising: a. a housing formed of electric insulating material including a rear casing and a front cover; b. a pair of switch contacts positioned in said housing; c. a switch operator mounted on said housing for operating said switch contacts; d. a forwardly extending boss formed in said rear housing having a pair of slots extending therethrough; e. a pair of shouldered inlet prongs extending rearwardly through said slots and protruding rearwardly from said housing, the shoulders on said inlet prongs being in abutting relationship with the inner front surfaces of said boss; f. a complementary boss formed in said front cover having a rear surface for sandwiching the shoulders of said inlet prongs between the bosses formed on said rear casing and said front cover for securely holding said inlet prongs on said housing; g. a pair of slots formed in said front cover adjacent to the boss which is formed in said front cover; and h. a pair of receptacle spring contacts positioned in said housing behind said slots formed in the front cover, one of said receptacle spring contacts being connected to one of the inlet prongs.
Claim 2
Dependent Claim
195 words
A wall plug-in switch mechanism comprising: a. a housing formed of electric insulating material including a rear casing and a front cover; b. a pair of switch contacts positioned in said housing; c. a switch operator mounted on said housing for operating said switch contacts; d. a forwardly extending boss formed in said rear housing having a pair of slots extending therethrough; e. a pair of shouldered inlet prongs extending rearwardly through said slots and protruding rearwardly from said housing, the shoulders on said inlet prongs being in abutting relationship with the inner front surfaces of said boss; f. a complementary boss formed in said front cover having a rear surface for sandwiching the shoulders of said inlet prongs between the bosses formed on said rear casing and said front cover for securely holding said inlet prongs on said housing; g. a pair of slots formed in said front cover adjacent to the boss which is formed in said front cover; and h. a pair of receptacle spring contacts positioned in said housing behind said slots formed in the front cover, one of said receptacle spring contacts being connected to one of the inlet prongs.
Claim 3
Dependent Claim
31 words
A time switch as defined in claim 1 wherein one of said switch contacts is connected to a switch blade and the switch blade is riveted to the other inlet prong.
Claim 4
Dependent Claim
33 words
A time switch as defined in claim 2 wherein the other switch contact is connected to a second switch blade and the second switch blade is riveted to the other receptacle spring contact.
Claim 5
Dependent Claim
39 words
A time switch as defined in claim 3 wherein complementary inwardly extending surfaces are formed on said front cover and rear casing for holding and guiding portions of the switch blades between the front cover and the rear casing.
Claim 6
Dependent Claim
50 words
A time switch as defined in claim 1 wherein a screw or other securing means is positioned within the bosses formed in said rear casing and said front cover for securely holding the front cover to the rear casing and for securely holding the shouldered inlet prongs between the bosses.
Claim 7
Dependent Claim
140 words
A time switch comprising: a. a housing formed of electric insulating material including a rear casing and a front cover; b. a pair of switch contacts positioned in said housing; c. a switch operator rotatably mounted on said front cover for operating said switch contacts; d. a forwardly extending boss formed in said rear housing having a pair of slots extending therethrough; e. a pair of shouldered inlet prongs extending rearwardly through said slots and protruding rearwardly from said housing, the shoulders on said inlet prongs being in abutting relationship with inner front surfaces of said boss; and f. a complementary boss formed in said front cover having a rear surface for sandwiching the shoulders of said inlet prongs between the bosses formed on said rear casing and said front cover for securely holding said inlet prongs on said housing.
Claim 8
Dependent Claim
140 words
A time switch comprising: a. a housing formed of electric insulating material including a rear casing and a front cover; b. a pair of switch contacts positioned in said housing; c. a switch operator rotatably mounted on said front cover for operating said switch contacts; d. a forwardly extending boss formed in said rear housing having a pair of slots extending therethrough; e. a pair of shouldered inlet prongs extending rearwardly through said slots and protruding rearwardly from said housing, the shoulders on said inlet prongs being in abutting relationship with inner front surfaces of said boss; and f. a complementary boss formed in said front cover having a rear surface for sandwiching the shoulders of said inlet prongs between the bosses formed on said rear casing and said front cover for securely holding said inlet prongs on said housing.
Claim 9
Dependent Claim
248 words
A wall plug-in time switch mechanism comprising: a. a housing formed of electric insulating material including a rear casing and a front cover; b. a pair of switch contacts positioned in said housing; c. a time driven dial rotatably mounted on said front cover; d. a switch operator rotatably mounted on said front cover adjacent to said time driven dial; e. switch on and switch off members rotatable with said dial for moving said switch operator at preset times to open and close said pair of switch contacts; f. a forwardly extending boss formed in said rear housing having a pair of slots extending therethrough; g. a pair of shouldered inlet prongs extending rearwardly through saId slots and protruding rearwardly from said housing, the shoulders on said inlet prongs being in abutting relationship with the inner front faces of said boss; h. a complementary boss formed in said front cover having a rear surface for sandwiching the shoulders of said inlet prongs between the bosses formed on said rear casing and said front cover for securely holding said inlet prongs on said housing; and i. an electric motor positioned in said housing for driving said time driven dial as a function of time, said motor including a coil having a pair of terminals positioned adjacent to said inlet prongs, one of said motor coil terminals being directly connected to one of the inlet prongs and the other motor coil terminal being directly connected to the other inlet prong.
Claim 10
Dependent Claim
248 words
A wall plug-in time switch mechanism comprising: a. a housing formed of electric insulating material including a rear casing and a front cover; b. a pair of switch contacts positioned in said housing; c. a time driven dial rotatably mounted on said front cover; d. a switch operator rotatably mounted on said front cover adjacent to said time driven dial; e. switch on and switch off members rotatable with said dial for moving said switch operator at preset times to open and close said pair of switch contacts; f. a forwardly extending boss formed in said rear housing having a pair of slots extending therethrough; g. a pair of shouldered inlet prongs extending rearwardly through saId slots and protruding rearwardly from said housing, the shoulders on said inlet prongs being in abutting relationship with the inner front faces of said boss; h. a complementary boss formed in said front cover having a rear surface for sandwiching the shoulders of said inlet prongs between the bosses formed on said rear casing and said front cover for securely holding said inlet prongs on said housing; and i. an electric motor positioned in said housing for driving said time driven dial as a function of time, said motor including a coil having a pair of terminals positioned adjacent to said inlet prongs, one of said motor coil terminals being directly connected to one of the inlet prongs and the other motor coil terminal being directly connected to the other inlet prong.
Claim 11
Dependent Claim
55 words
A time switch as defined in claim 7 wherein a spacer member formed of electrical insulating material is positioned between the boss formed on said front cover and the shoulders of said inlet prongs for shielding the inlet prongs and for securely holding them between the bosses formed on the rear casing and front cover.
References Cited (Backward Citations)
US2673901A
Cited
US3588391A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |