Luminous Pointer for Felling Notch Alignment
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Solution Overview
Problem
Existing methods for aligning felling notches in trees to determine the direction of fall are imprecise, leading to potential damage to other trees or objects and instability during felling, especially under external forces like wind.
Innovation Solution
A collapsible measuring device with a straight measuring edge and a luminous pointer aligned normal to the measuring edge, which is placed in the notch to project a beam indicating the direction of fall, allowing for precise alignment and adjustment of the felling notch.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a simple line is drawn on the chainsaw housing to indicate fall direction, then the method is simple and practical, but the direction prediction is imprecise
Solution Approach 1:
The patent introduces a luminous pointer as an intermediary element between the chainsaw and the fall direction indication. This pointer, when aligned with the notch edge, projects a visible beam that clearly shows the intended fall direction, resolving the ambiguity of the simple line method while maintaining ease of use
Solution Approach 2:
The patent utilizes light emission and reflection properties to create a visible indication system. The luminous pointer emits light that reflects off the terrain or objects, providing a clear visual marker for the fall direction that overcomes the invisibility problem of the simple line method
2Reliability
If a tree lifter device is inserted into the cutting plane to push cut surfaces apart, then the tree can be forced to fall in the specified direction against external forces, but the device does not correct misaligned notches
Solution Approach 1:
The patent applies preliminary action by providing a measurement and alignment tool (luminous pointer device) that is used before the actual felling operation. This allows the operator to check and adjust the notch alignment beforehand, preventing the need for corrective force application during the fall process
Solution Approach 2:
The luminous pointer acts as an intermediary measurement tool that bridges the gap between the notch geometry and the intended fall direction. It provides visual feedback that allows precise alignment without requiring physical intervention in the cutting plane
3Measurement precision
If a measuring device with luminous pointer is used to align the notch precisely, then the fall direction can be predicted reliably, but the device may be complex and heavy for transport
Solution Approach 1:
The patent makes the luminous pointer device universal by integrating it with existing chainsaws. The device can be attached to the chainsaw housing and utilizes the chainsaw's own power source, allowing one device to serve multiple operators and multiple felling operations without requiring separate power supplies or complex infrastructure
Solution Approach 2:
The patent implements nesting by integrating the luminous pointer device into the existing chainsaw structure. The pointer mounts on the chainsaw housing and uses the chainsaw's battery compartment for power, creating a compact integrated system that is portable and easy to transport
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
Enables reliable prediction and control of the tree's fall direction, reducing the risk of damage and ensuring accurate orientation, even under external forces, while being easy to use, lightweight, and cost-effective.
Implementation Method 1
a luminous pointer 2.2, which emits a luminous beam 2.3, which is directed normal to the measuring edge 2.1 and shines away from it
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The instrument (2) for alignment of a wedge (1.1) cut into a tree trunk (1) and the like, to ensure a correct fall when felling by a cut (1.2) opposite the wedge cut, has a measurement edge (2.1) inserted into the wedge point (1.1.1). A laser pointer (2.2) directs a light beam (2.3) on the normal plane to the measurement edge.