§
Luxuse
Patent Intelligence
Sign In
← Back to Patent Explorer
US3876273A Expired / Lapsed US ⏱️ 0.0 years remaining

Electrical safety service block

Assignee: Cable Electric Products Inc
•
Filing: 1973-07-05
•
Granted: 1975-04-08
•
Expires: 1993-07-05
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract A rectangular service block is mounted at one end of an extension cord. The block is provided with two pairs of slots on one face and a single pair of slots on the opposite face for receiving the male contact plugs. The block is preferably molded of a plastic, dielectric material. A pair of rectangular dielectric flaps are molded with the block for each pair of the slots on the face having two pairs of slots. Each flap is integrally connected at one end to the block by a flexible web of material. The connection to the block is from the side in transverse alignment with each pair of slots. Each flap is provided with a pair of spaced, integral, rectangular tabs extending at right angles and adapted to enter the slots. The tab nearest the hinge on each flap being shorter to permit the pivotal action. The tabs are pushed into the slots with a fraction grip to provide a safety capping of the two pairs of slots when only the single pair of slots on the opposite face is in use.

Inventors

  • 👤 Frederic W Schwartz

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 05:05
CPC Classifications
H; H01; H01R; H01R13/00; H01R13/44; H01R13/443; H01R13/46; H01R13/50; H01R13/501; H01R31/00; H01R31/02

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 121 words
A multiple service block comprising a molded rectangular block of dielectric material, means for connecting said block to a source of electric current, said block having a plurality of pairs of slots for receiving male contact plugs, and dielectric means integral with said block for plugging at least one pair of said slots when not in use, said dielectric means including a rectangular flap of dielectric material integrally connected to said block by a web of flexible material, said flap having a pair of integral extending tabs of dielectric material for each pair of slots to be plugged, said tabs frictionally fitting into said slots, said tabs said pair being of unequal length, the tab closer to said web being shorter.
Claim 2
Dependent Claim 121 words
A multiple service block comprising a molded rectangular block of dielectric material, means for connecting said block to a source of electric current, said block having a plurality of pairs of slots for receiving male contact plugs, and dielectric means integral with said block for plugging at least one pair of said slots when not in use, said dielectric means including a rectangular flap of dielectric material integrally connected to said block by a web of flexible material, said flap having a pair of integral extending tabs of dielectric material for each pair of slots to be plugged, said tabs frictionally fitting into said slots, said tabs said pair being of unequal length, the tab closer to said web being shorter.
Claim 3
Dependent Claim 45 words
A multiple service block as in claim 1, wherein a separate rectangular flap of dielectric material is provided for each pair of slots to be plugged, each flap having an integral web of flexible material extending from one end of the flap to said block.
Claim 4
Dependent Claim 34 words
A multiple service block as in claim 1, wherein said means for connecting comprises a pair of male contact blades extending from said block on a face opposite said plurality of pairs of slots.
Claim 5
Dependent Claim 18 words
A multiple service block as in claim 1, wherein said means for connecting comprises an electrical extension cord.
Claim 6
Dependent Claim 56 words
A multiple service block as in claim 2, wherein said block is provided with a plurality of pairs of slots on one face thereof and a single pair of slots on another opposite face thereof, said each flap being mounted on said block for plugging said plurality of pairs of slots on the one face thereof.

References Cited (Backward Citations)

US2702893A Cited
US2799839A Cited
US2932811A Cited
US3064229A Cited
US3239791A Cited
US3389367A Cited
US3439315A Cited
US3646499A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-04-07 1978-10-07 1979-04-08 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-04-07 1982-10-07 1983-04-08 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-04-07 1986-10-07 1987-04-08 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag