PID Lamp Assembly With Low-Temperature Sealing and Side Driving Pads
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Solution Overview
Problem
Conventional photoionization detector (PID) lamps face issues with inconsistent size and shape due to high temperature manufacturing, necessitating elongation for driver pads, which increases voltage requirements and overall size, and suboptimal positioning of driving pads in the middle of the tube.
Innovation Solution
A PID lamp assembly design featuring a cap with a step aperture, a crystal window, and annular grooves for driving pads, along with a capillary tube sealed via a low-temperature process, allowing for a compact size and efficient electrical connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the lamp is manufactured with high temperature, then the lamp can be formed, but the size of the lamp becomes inconsistent and the shape of the tail becomes inconsistent
Solution Approach 1:
The patent changes the manufacturing temperature parameter from high temperature to low temperature process. The capillary tube is sealed to the glass tube at temperatures below the softening point of glass, eliminating thermal deformation and ensuring consistent lamp size and tail shape while maintaining manufacturability through cold sealing techniques.
2Ease of manufacture
If the lamp is elongated to ensure adequate room for driver pads, then the driver pads can be installed, but the PID becomes larger than desired
Solution Approach 1:
The patent transitions from a one-dimensional elongation approach to a two-dimensional surface utilization approach. Driver pads are positioned on the lateral surface of the glass tube rather than requiring extended length, allowing adequate spacing for electrical connections while maintaining a compact lamp length that fits desired PID dimensions.
3Ease of manufacture
If the driving pads are positioned in the middle of the tube, then the lamp can be assembled, but increased voltage requirements are needed to operate the lamp and PID
Solution Approach 1:
The patent applies local quality by positioning driving pads at specific locations on the glass tube surface rather than in the middle. This strategic positioning optimizes the electrical field distribution and reduces the voltage required for operation, while still allowing proper assembly and connection of the lamp components.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design achieves a smaller and more efficient PID lamp assembly with reduced voltage requirements, enabling effective UV light generation and ionization of gas molecules.
Implementation Method 1
a crystal window sealed over the cap and configured to allow the passing of ultraviolet (UV) light
Implementation Method 2
a first end of the capillary tube sealed with the cap via glass powder after insertion of gas within the lamp chamber
Implementation Method 3
VUV light may photo-ionize trace organic compounds, but not the air, resulting in electrons being ejected and forming positively charged molecules
Implementation Method 4
VUV light may photo-ionize trace organic compounds, but not the air, resulting in electrons being ejected and forming positively charged molecules
Data Source
AI summary
A photoionization detector (PID) lamp assembly and method are disclosed. The PID lamp assembly comprises a cap defining a lamp chamber within and the cap having a step aperture. Further, a crystal window is sealed over the cap and is configured to allow the passing of ultraviolet (UV) light. Further, a capillary tube is sealed to the cap via the step aperture of the cap. Thereafter, a pair of annular grooves are formed on the cap to install a pair of driving pads on the cap.