Patent US3748532A successfully refreshed from Google Patents.
US3748532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removable dimmer attachment for a portable lamp
Assignee: FRIEDRICH AIR CONDITIONING AND REFRIGERATION Co Inc A CORP OF TEX
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Filing: 1971-12-15
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Granted: 1973-07-24
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Expires: 1991-12-15
Abstract
Abstract The present invention pertains to a removable dimmer attachment for a portable incandescent lamp. A conductor cord connects the lamp to a source of alternating current and is divided into two sections. The two sections of the lamp cord are connected by a plug and receptacle for operation of the lamp in the normal manner. The removable dimmer attachent is connected between the two sections of the lamp cord when desired and provides variable control over the level of illumination from the lamp. The connections between the two sections of the lamp cord and the connections of the lamp cord to the dimmer attachment are polarized.
Inventors
- 👤 S Rosenbaum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:21
CPC Classifications
H; H01; H01C; H01C10/00; H01C10/50; F; F21; F21V; F21V23/00; H01H; H01H3/00; H01H3/02; H01H3/0213; H01H9/00; H01H9/02; H01H9/0214; H01H9/0228; Y; Y10; Y10S; Y10S315/00; Y10S315/07
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
139 words
In a portable incandescent lamp, the combination comprising: a. a conductor cord connecting an incandescent lamp socket to a source of alternating current; b. said cord being divided into two sections; c. mating electrical connectors attached to ends of each of said sections; and d. an adjustable dimmer removably connected between the connectors attached to the cord; e. said dimmer comprising a housing containing a lamp dimming circuit; f. said housing having recesses formed at opposite ends thereof; g. each of said recesses being shaped to receive one end of the connectors attached to the two sections of the conductor cord; and h. a pair of electrical contacts located in each of said recesses and being connected to the lamp dimming circuit; i. each pair of said contacts detachably engaging with contacts of the connector received in said recess.
Claim 2
Dependent Claim
139 words
In a portable incandescent lamp, the combination comprising: a. a conductor cord connecting an incandescent lamp socket to a source of alternating current; b. said cord being divided into two sections; c. mating electrical connectors attached to ends of each of said sections; and d. an adjustable dimmer removably connected between the connectors attached to the cord; e. said dimmer comprising a housing containing a lamp dimming circuit; f. said housing having recesses formed at opposite ends thereof; g. each of said recesses being shaped to receive one end of the connectors attached to the two sections of the conductor cord; and h. a pair of electrical contacts located in each of said recesses and being connected to the lamp dimming circuit; i. each pair of said contacts detachably engaging with contacts of the connector received in said recess.
Claim 3
Dependent Claim
38 words
In a portable incandescent lamp, the combination as defined in claim 1 which includEs: a. means for polarizing electrical connections between the connectors attached to the sections of the conductors cord and the contacts carried by the dimmer.
Claim 4
Dependent Claim
53 words
In a portable incandescent lamp, the combination as defined in claim 2 wherein: a. the polarizing means includes shaped walls formed on the connectors attached to the conductor cord and the recesses formed in the ends of the dimmer housing are shaped to receive one of the connectors attached to the conductor cord.
Claim 5
Dependent Claim
96 words
A lamp dimmer for removable connection in a lamp cord connecting a portable incandescent lamp to a source of alternating current which comprises: a. a split housing of insulating material; b. said housing having spaced ends and shaped recesses formed therein; c. circuit means enclosed within said housing for adjustably controlling a supply of alternating current to an incandescent lamp; and d. a pair of spaced contact elements connected to said circuit and being located in each of said shaped recesses in the housing; e. said contacts being connected to the dimmer circuit in the housing.
Claim 6
Dependent Claim
96 words
A lamp dimmer for removable connection in a lamp cord connecting a portable incandescent lamp to a source of alternating current which comprises: a. a split housing of insulating material; b. said housing having spaced ends and shaped recesses formed therein; c. circuit means enclosed within said housing for adjustably controlling a supply of alternating current to an incandescent lamp; and d. a pair of spaced contact elements connected to said circuit and being located in each of said shaped recesses in the housing; e. said contacts being connected to the dimmer circuit in the housing.
Claim 7
Dependent Claim
49 words
A lamp dimmer for removable connection in a lamp cord as defined in claim 4 wherein: a. the circuit enclosed within the housing includes: b. a thyristor connected in series between one of the contact elements of each pair; and c. an adjustable R-C network connected across said thyristor.
Claim 8
Dependent Claim
33 words
A lamp dimmer for removable connection in a lamp cord as defined in claim 4 wherein: a. the recess in the housing are shaped to polarize connections to the contact elements contained therein.
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) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |