Electrical device

Makoto Chikaraishi, Anjo (JP); Tatsuya Kobayashi, Anjo (JP)

USPTO: us-12628735 · published 2026-05-19 · patents · A01D 34/82· A01D 34/008· F21S 43/26· F21S 43/30· A01D 34/78· A01D 2101/00· G08B 5/38

Electrical device

Makoto Chikaraishi, Anjo (JP) , Tatsuya Kobayashi, Anjo (JP) This is my paper

Pith reviewed 2026-05-20 15:31 UTC · model grok-4.3

classification patents A01D 34/82A01D 34/008F21S 43/26F21S 43/30A01D 34/78A01D 2101/00G08B 5/38

keywords electrical devicedisplay housinglight reflectorcircuit board orientationupward light emissiontransmissive coverstatus indicator

0 comments

The pith

An electrical device orients its internal circuit board downward so reflected light exits upward through a top-facing opening.

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The patent describes an electrical device whose display uses a housing with an upward-facing opening covered by a clear transmissive member. Inside, a light source on a tilted circuit board emits light downward onto a reflector that redirects it upward at an inclined angle. The control device turns the light on or off according to the device's operating state. This arrangement keeps the circuit board hidden while still producing visible indication from above in normal use. The housing body itself blocks light except through the designated opening.

Core claim

In normal use the opening faces substantially upward and the reflective surface reflects visible light in a direction inclined upward with respect to the horizontal, achieved by orienting the first surface of the circuit board downward relative to horizontal.

What carries the argument

Circuit board whose first surface normal is inclined downward, paired with an upward-facing reflector that redirects the emitted light through the top opening.

If this is right

The light source can be controlled to signal device state without any external lens or window on the sides or front of the housing.
The opaque housing body prevents stray light leakage except through the designated top opening.
The same reflector and board tilt can be used across multiple device states by simply switching the light source on or off.

Where Pith is reading between the lines

These are editorial extensions of the paper, not claims the author makes directly.

The design could reduce the need for side-mounted indicators in compact equipment where only top-down viewing is expected.
If the transmissive member is made impact-resistant, the arrangement might also serve as a status light in outdoor or industrial housings.

Load-bearing premise

The transmissive member covers substantially the entirety of the opening and maintains high visible-light transmittance while the housing body remains opaque, without quantified optical or durability testing under field conditions.

What would settle it

Measure the actual exit angle and intensity of light from the opening when the circuit board is mounted at the claimed downward inclination; if the beam does not reliably exit upward at the stated angle under normal device orientation, the configuration fails.

read the original abstract

1 . An electrical device configured to operate on supplied electric power, the electrical device comprising: a display configured to display a state related to the electrical device; a control device configured to control the electrical device; and a power supply configured to supply electric power to the electrical device, wherein the display comprises: a housing including a housing body, an opening, and a transmissive member, wherein the housing body is constituted of a material having a low visible light transmittance, the opening is defined through a portion of the housing body, and the transmissive member is constituted of a material having a high visible light transmittance and covers substantially an entirety of the opening; a light source device housed in the housing and configured to emit visible light; and a reflector housed in the housing and having a reflective surface configured to reflect the visible light emitted from the light source device toward the opening, the control device is configured to control the light source device according to the state related to the electrical device, in a normal state of use of the electrical device, the opening is open substantially upward and the reflective surface is configured to reflect the visible light emitted from the light source device in a direction inclined upward with respect to a horizontal direction, the light source device comprises a circuit board including a first surface on which a light source element is disposed and a second surface opposite to the first surface and on which a light source element is not disposed, and a normal direction of the first surface of the circuit board is oriented to be inclined downward relative to the horizontal direction in order to emit the visible light downward.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Desk Editor's Note private letter to a colleague

A utility patent on a tilted board plus angled reflector to make status lights readable from above on handheld outdoor gear; mechanically consistent but narrow and untested.

read the letter

This patent lays out one concrete way to point light from a status LED upward through a top window on a device that normally sits flat or tilted down. The circuit board faces slightly downward, the reflector bounces the light up at an angle, and the housing stays opaque except for the transmissive cover. That geometry is spelled out clearly and avoids any obvious contradictions with basic optics or component placement. The filing is internally coherent on its own terms and gives a workable parts list for someone who needs to replicate the layout. Beyond that, there is little else. No measurements of brightness, viewing angle, or durability under vibration, dust, or water appear, so we cannot tell whether the arrangement actually solves a real visibility problem better than existing solutions or simply survives field use. The scope is also limited to a narrow class of walk-behind or hand-held machines. For product engineers who build exactly this kind of equipment and need one more documented option for the display housing, the drawings and claim language could save a few hours of drafting. For anyone else the document adds almost nothing. It does not belong in a research reading group and would not be sent out for peer review; it is a standard utility patent application, not a scientific result.

Referee Report

0 major / 2 minor

Summary. The manuscript describes an electrical device with a display comprising an opaque housing body, an upward-facing opening covered by a high-transmittance transmissive member, a light source mounted on a circuit board whose first surface is oriented downward relative to horizontal, and a reflector that redirects the emitted visible light upward through the opening to indicate device state under control of the control device.

Significance. The described geometric arrangement is mechanically plausible and internally consistent under ordinary ray optics, providing a compact means to direct indicator illumination upward without direct exposure of the light source. No empirical performance data, durability testing, or comparison to prior art are supplied, limiting assessment of practical advantage.

minor comments (2)

The abstract and claim language repeat the orientation description without quantifying the inclination angle or the resulting luminous intensity distribution at the opening.
No figure or sectional diagram is referenced in the provided text to illustrate the relative positions of the circuit board, reflector, and transmissive member.

Simulated Author's Rebuttal

1 responses · 0 unresolved

We thank the referee for the careful reading and positive assessment of the geometric arrangement. The manuscript is a patent specification whose purpose is to disclose a novel structural configuration; we address the request for context on performance and prior art below.

read point-by-point responses

Referee: No empirical performance data, durability testing, or comparison to prior art are supplied, limiting assessment of practical advantage.

Authors: The document is a patent claim set whose statutory requirement is enablement of the claimed structure, not quantitative performance data. The optical path is fully described by the geometry of the downward-tilted board, reflector, and upward opening; ordinary ray optics suffice to establish functionality. Durability and comparative metrics are outside the scope of this filing and would be appropriate for a subsequent utility or design patent continuation if needed. revision: no

Circularity Check

0 steps flagged

No significant circularity

full rationale

The document is a patent claim describing a physical device geometry (opaque housing, upward opening covered by transmissive member, downward-tilted circuit board, angled reflector). No equations, fitted parameters, predictions, derivations, or scaling relations are present. The arrangement is asserted directly as a mechanical configuration; nothing reduces to a self-definition, self-citation, or input-by-construction step.

Axiom & Free-Parameter Ledger

0 free parameters · 0 axioms · 0 invented entities

No free parameters, axioms, or invented physical entities are introduced; the disclosure consists of a geometric layout of standard components.

pith-pipeline@v0.9.0 · 5870 in / 989 out tokens · 24011 ms · 2026-05-20T15:31:28.286284+00:00 · methodology

Electrical device

Core claim

What carries the argument

If this is right

Where Pith is reading between the lines

Load-bearing premise

What would settle it

discussion (0)