Microphone Cable Adaptor Plenum Seal via O-Ring
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Solution Overview
Problem
Wired microphones face challenges in precise directional control and cable routing, particularly when suspended, and existing solutions fail to maintain plenum ratings when cables pass through ceilings, requiring frequent adjustments that often result in unsightly coiled cables and compromised installations.
Innovation Solution
A cable adaptor system that allows adjustable microphone positioning by varying cable length and maintaining an air-tight seal through an O-ring mechanism, enabling 360-degree rotation and length adjustments without compromising plenum ratings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the microphone cable is extended through the drop ceiling to allow positioning adjustment, then the microphone can be repositioned flexibly, but the plenum rating is destroyed by creating an air passageway
Solution Approach 1:
The patent introduces an intermediary device (adaptor with seal) that mediates between the cable and ceiling opening. The adaptor body fits into the ceiling opening while the seal member (grommet or O-ring) creates an air-tight barrier, allowing the cable to pass through without compromising the plenum rating. This intermediary structure enables both cable routing and plenum maintenance simultaneously.
Solution Approach 2:
The system segments the cable routing function from the ceiling structure by introducing a separate adaptor component. The adaptor is divided into distinct functional elements: the body that interfaces with the ceiling, the seal member that prevents air leakage, and the cable guide that manages cable passage. This segmentation allows each component to perform its specific function without compromising the overall plenum integrity.
2Reliability
If the cable length is fixed during installation to maintain plenum seal, then the plenum rating is maintained, but the microphone cannot be repositioned without cutting and splicing the cable
Solution Approach 1:
The patent applies dynamics by making the cable length adjustable within the adaptor system. The cable can be extended or retracted through the seal member without compromising the plenum seal, allowing the microphone to be repositioned dynamically. The seal member maintains its sealing function regardless of cable position, enabling flexible adjustment while preserving plenum integrity.
Solution Approach 2:
The system allows parameter changes in cable length and microphone position without changing the fundamental sealing mechanism. The seal member accommodates variations in cable extension while maintaining the air-tight barrier, enabling parameter adjustments (cable length, microphone position) without compromising plenum rating.
3Adaptability or versatility
If extra cable is added to adjust length for repositioning, then the microphone can be repositioned, but unsightly coiled cable results
Solution Approach 1:
The patent applies the nesting principle by allowing excess cable to be stored within the adaptor body or coiled in an organized manner within the ceiling space. The adaptor structure provides a containment space for managing extra cable length, preventing it from hanging loosely or creating unsightly coils. The cable can be neatly arranged within the adaptor or routed through designated pathways.
4Adaptability or versatility
If the cable is allowed to rotate freely for positioning adjustment, then the microphone can be oriented in any direction, but precise directional control becomes difficult
Solution Approach 1:
The patent applies preliminary action by providing pre-marked angular positions or alignment features on the adaptor or ceiling structure. These pre-established reference points guide the user in positioning the microphone at precise angles before final installation. The alignment features may include notches, markers, or mechanical stops that indicate standard directional positions (e.g., 0°, 45°, 90°), enabling accurate orientation without requiring complex adjustment mechanisms during installation.
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
Facilitates precise microphone positioning and directional control while maintaining a plenum seal, allowing for flexible cable management without the need for frequent cable cutting or unsightly coiled cables, thus meeting building codes and aesthetics.
Implementation Method 1
The adaptor creates an air-tight seal between the adaptor body and the microphone cable
Data Source
AI summary
An adaptor for retaining and suspending cabled microphones comprises a main body having a first threaded end and an opposite second threaded end with a circumferential flange separating the first and second threaded ends and extending from the main body. A bore extends longitudinally through main body. A cap threads onto the first threaded end and a nut threads onto the second threaded end. The microphone cable extends through a bore in each of the nut and the cap and through the bore 20 through main body. An O-ring is captured between the cap and main and prevents relative movement between the cable and the main body when the cap is tightened, and creates a plenum seal through the adaptor.