Threaded Protective Shade for Light Fixture Theft Prevention
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Solution Overview
Problem
Existing exterior shades for lighting fixtures are difficult to install, remove, and maintain, often resulting in poor light distribution, theft of light bulbs, and complicated maintenance due to permanent or semi-permanent installations.
Innovation Solution
A protective exterior shade/luminaire with a thread base cover and a protective canister featuring a light-distributing thread that securely attaches to ceramic bases/sockets without screws, allowing easy installation, replacement of light bulbs, and preventing theft by ensuring a firm assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If exterior shades are fixed to surfaces by means of screws or other attachments, then the shades provide secure protection against weather and theft, but the installation and maintenance become complicated and time-consuming
Solution Approach 1:
The patent replaces the screw-based mechanical fastening system with a friction-fit cylindrical interface. The exterior shade has a cylindrical bottom portion that fits over the ceramic base with a friction grip, eliminating the need for screws or other mechanical attachments. This substitution maintains secure protection while dramatically simplifying installation and maintenance.
2Reliability
If exterior shades are permanently or semi-permanently installed, then the shades provide stable protection, but the light bulbs become difficult to exchange when they burn out
Solution Approach 1:
The patent segments the lighting assembly into three independent components: the ceramic base (fixed to surface), the exterior shade (friction-fit on base), and the light bulb (screwed into base). This segmentation allows the light bulb to be replaced independently without affecting the exterior shade or ceramic base, enabling easy bulb exchange while maintaining stable protection.
3Ease of operation
If exterior shades use flange-based attachment, then the shades can be installed without screws, but the assembly is not sufficiently secure and allows theft by easy detachment
Solution Approach 1:
The patent employs a cylindrical shell structure where the bottom portion of the exterior shade acts as a flexible yet rigid friction-fit interface. This cylindrical shell design provides sufficient friction grip to secure the shade to the ceramic base, preventing easy detachment and theft, while still allowing simple installation without screws.
Data Source
AI summary
The present invention relates to a protective exterior shade/luminaire provided with a thread base cover and a protective canister with light-distributing thread to protect light bulbs installed in ceramic bases/sockets against weather, dust, water, shock and to provide longer life and better appearance of the light bulbs, for use in the home, in industry and in general. The thread of the base cover and the protective canister ensure a secure assembly in a firm manner and prevent the theft of the light bulb and its parts. The protective covers eliminate the need to remove the ceramic bases/sockets, because the protective exterior shade/luminaire is placed between the light bulb and the ceramic bases/sockets.