PRINCIPAL
THINKING LLC

PRODUCT DEVELOPMENT · INTELLECTUAL PROPERTY

Real problems.
Original thinking.
Better possibilities.

Principal Thinking develops original products inspired by real industrial work. Our inventions and available intellectual property are open to purchase, licensing, or leasing discussions. Explore the work. See the opportunity. Talk directly with the inventor.

FOUNDED BY A WELDER.
DRIVEN BY POSSIBILITY.
INDEPENDENTLY DEVELOPED
PRINCIPAL THINKING, LLC
THE PORTFOLIO / 01—02ORIGINAL PRODUCT DEVELOPMENT
Matte black finish visualization based on Jonathan Evans’s patented contoured welding handleERGONOMIC TIG HANDLEU.S. DESIGN PATENT D969,580 S ↗

PRACTICAL EXPERIENCE. ORIGINAL THINKING.

Designed around
the work.

↗
PRODUCT INNOVATIONIP ACQUISITIONLICENSING & LEASING

01 / PRODUCT PORTFOLIO

Our inventions.
Your next opportunity.

Explore our products and designs. Interested buyers can inquire about our products and IP, or request licensing or leasing terms. Each project’s stage and available rights guide the next step.

Explore the Hot Weld concept, operating modes & development plan +

HOT WELD WARNING LIGHT / PRODUCT EXPLAINED

Make lingering heat
easier to recognize.

A portable warning concept developed by a working pipe welder to address a hazard that can remain after the visible welding activity has ended.

The problem it addresses

A welded pipe, plate, fitting, or other workpiece can retain heat after the torch or electrode is put down. A person arriving later may not have seen the welding and may not recognize the hazard before reaching toward the metal or moving through the work area.

The challenge is communicating that residual heat to the next person. An unnoticed hot surface can lead to accidental contact, interrupted work, and avoidable disruption. HWL is intended to bring the warning closer to the hazard and draw attention when someone approaches.

Why Jonathan invented it

Jonathan Evans developed the idea from his experience as a professional pipe welder. The goal is a practical warning that can stay near the workpiece after welding ends, helping coworkers recognize the need for caution even when the welder has moved on.

The upgraded version connects that warning to a monitored surface temperature. Instead of relying only on someone remembering when the welding finished, the planned temperature mode uses a measured condition to determine whether an approaching person should receive an alert.

How the upgraded version is intended to work

  1. Position it near the hazard.

    Place the unit approximately one foot away from the hot workpiece on a suitable nearby support, rather than directly on the weld. The magnetic base is intended to offer mounting flexibility on suitable steel surfaces, subject to retention and heat-exposure testing.

  2. Aim at the surface to monitor.

    The upgraded head is designed to adjust up and down through 180° and side to side through 180°. A laser aiming aid helps the operator point the infrared sensor toward the intended area. The infrared sensor measures temperature without touching the workpiece; the laser helps with aiming.

  3. Select the warning mode.

    Choose a motion-activated voice-and-light warning, a motion-activated light-only warning, or temperature-linked operation. In temperature mode, the design target is to enable approach warnings when the monitored surface is above 120°F (about 49°C).

  4. Warn when someone approaches.

    Motion detection is intended to trigger a flashing red dome and, when enabled, a spoken “Hot Weld” or “Hot Surface” warning. Temperature-linked mode combines the measured heat condition with detected motion to deliver the warning at the point of approach.

  5. Follow the cooling condition.

    In temperature mode, the planned control logic stops heat-triggered approach warnings once the monitored surface falls below the configured threshold. A below-threshold reading is not a declaration that the entire workpiece is safe to touch.

MODE 01

Motion + voice + light

Detected movement triggers flashing red light and a spoken warning. This mode provides an approach reminder without requiring temperature-linked operation.

MODE 02

Motion + light only

The visual warning responds to motion while the audible warning is muted. This offers a planned option for situations where a voice alert is unsuitable.

MODE 03 / UPGRADED

Temperature + motion

The aimed infrared sensor monitors a selected surface. Above the threshold, detected motion triggers the configured warning; below it, heat-triggered warnings end.

Where it could be useful

Intended settings include welding and fabrication shops, shipbuilding, manufacturing, and industrial maintenance. The “Hot Surface” message broadens the concept beyond welds to other monitored hot surfaces, subject to application testing.

The intended benefit is clearer hazard awareness before accidental contact. Reducing burns, work interruptions, and downtime are development goals that require testing; no measured reduction is claimed.

Development and validation

The CAD visual shows the original housing configuration; the adjustable infrared head is a later design revision. Mechanical housing CAD is prepared; electronics, firmware, prototype assembly, and validation remain ahead. Testing must assess motion coverage, voice audibility, warning visibility, mounting security, and temperature accuracy across surface finishes and aiming conditions.

The 120°F setting is a proposed operating threshold, not a universal safe-touch limit. HWL is intended to supplement workplace precautions, PPE, and established hot-work procedures. Final features and performance depend on prototype evaluation.

Discuss this product or its IP ↗

02 / WELDING ERGONOMICS

Ergonomic TIG
welding handle

A contoured handle design inspired by the way welders hold and guide a TIG torch. Its purpose is to support a comfortable, controlled grip during precise work, with the handle shape forming the core of the design.

Understand the purpose & design ↓U.S. DESIGN PATENT D969,580 S

Issued November 15, 2022 · Inventor: Jonathan Evans

Download issued patent & drawings ↓

Our product and IP are open
to sale, licensing, or leasing
discussions with interested buyers.

Request commercial details ↗

Compatibility and performance depend on application and evaluation.

Explore the handle design, application & commercial possibilities +

ERGONOMIC TIG HANDLE / PRODUCT EXPLAINED

A considered grip.
For work that demands control.

An original handle design shaped by Jonathan Evans’s experience holding welding tools through demanding, detailed work.

The problem it addresses

TIG welding requires the operator to guide a torch with care. The handle is the connection between the welder’s hand and that movement. A grip that does not suit the user or working position can feel awkward, encourage repeated repositioning, or make sustained control more difficult.

Jonathan’s design focuses on that everyday interaction: how the handle sits in the hand and how its shape can support the welder while directing the torch.

Why Jonathan developed it

The ergonomic TIG handle grew from practical welding experience and the desire to improve the feel of a familiar tool. Its purpose is to give welders a more natural gripping surface while preserving the deliberate control needed to guide a TIG torch.

Comfort, reduced grip effort, and consistent handling are intended benefits for evaluation. The website does not claim that the handle has been proven to prevent strain or improve weld quality.

How the handle design works

  1. The contour provides the hand interface.

    The shaped grip shown in the patent drawings is intended to give the hand a defined surface to hold and orient, rather than treating the handle as a purely straight tube. The design centers on the handle’s physical form.

  2. The welder guides the torch through the grip.

    During use in a compatible torch assembly, the operator holds the handle and directs the torch. The intended improvement comes from the feel and geometry of that grip; it is not an automated welding function or a change to the welding process.

  3. Fit and comfort are evaluated for the application.

    Integration requires review of the target torch’s connections, dimensions, cable arrangement, heat exposure, and electrical insulation requirements. Evaluation with welding gloves, different hand sizes, and realistic working positions is needed before making performance claims.

What visitors can inspect

Open “View Patent Drawings” above to compare all seven published views of the handle. These drawings show the protected design from multiple angles and provide an accurate reference for its contours. They are patent illustrations rather than photographs of a finished production product.

U.S. Design Patent D969,580 S, issued November 15, 2022, identifies Jonathan Evans as the inventor.

Commercial possibilities

Principal Thinking welcomes individuals and companies interested in the ergonomic handle design, including welding equipment manufacturers and other potential buyers. Discussions can cover a product purchase where available, acquisition of available IP, or licensing or leasing agreed rights.

Contact Jonathan to review the design, intended application, available development information, and commercial terms. Compatibility, production readiness, pricing, and delivery are confirmed for the proposed arrangement.

Discuss this handle or its IP ↗

02 / COMMERCIAL OPPORTUNITIES

Everything we invent.
Open to opportunity.

Every invention we develop is available for a commercial conversation. Buy an available product, acquire available intellectual property, or negotiate a license or lease. Product readiness and the rights included are confirmed for each agreement.

01 / PRODUCTS

Products for sale

Interested in one of our products? Contact us to purchase an available product or discuss future orders for a design still in development. We welcome individual and company inquiries.

Inquire about our products ↗Development-stage products may not yet be orderable.
02 / OWNERSHIP

Our IP for sale

We welcome offers from individuals and companies interested in buying our intellectual property. Discuss outright acquisition of our product designs, associated patent rights, and available development assets.

Inquire about buying our IP ↗Available rights and transaction scope are agreed for each project.
03 / RIGHTS TO USE

License or lease

Interested in using our designs while Principal Thinking retains ownership? Discuss licensing or leasing agreed rights to our products or IP, including duration, territory, permitted use, and exclusivity.

Explore licensing / leasing ↗Every arrangement is subject to a negotiated written agreement.

Principal Thinking is the developer and seller of the products and IP presented here. Pricing, availability, rights, and delivery are confirmed individually; inquiries do not create a purchase or agreement.

03 / DEVELOPMENT APPROACH

Good ideas begin
with paying attention.

Practical experience shapes the question. A disciplined development process helps shape the answer.

01 / OBSERVE

Start with
the real problem.

Look closely at the task, the environment, and the people doing the work. Define what a useful improvement needs to accomplish.

02 / DEVELOP

Give the
idea form.

Translate the concept into requirements, design studies, and engineering work with qualified technical collaborators.

03 / VALIDATE

Put assumptions
to the test.

Plan prototyping and evaluation to understand feasibility, usability, and performance before making commercial claims.

04 / COLLABORATE

Find a path
to the market.

Explore manufacturing, licensing, and distribution relationships that can help promising products move forward.

THE PERSPECTIVE BEHIND THE PRODUCTS
Start with the work.
Find the friction.
Design a better way.
Jonathan EvansPIPE WELDER · FOUNDER · INVENTOR

04 / OUR STORY

Built from experience.
Looking ahead.

Principal Thinking, LLC is a product development company founded by Jonathan Evans, a professional pipe welder whose welding career began in 2003.

Years of industrial work offer a close view of everyday challenges—how tools feel in the hand, how hazards are communicated, and where a thoughtful design could make a difference.

That perspective drives our work: original product concepts grounded in practical needs, developed independently, and advanced through the right partnerships.

Meet Jonathan, Founder & CEO ↗
Jonathan Evans, Founder and CEO of Principal Thinking
Jonathan EvansFounder & CEO · Principal Thinking, LLC

05 / WORK WITH US

Your next product.
Our original thinking.

Manufacturing

Explore materials, production feasibility, and paths from prototype to manufacturing.

Licensing & distribution

Interested companies can purchase or license our designs to complement their product line, or explore an agreed lease arrangement.

Development & investment

Connect around engineering, testing, or funding opportunities for product development.

Start a conversation ↗

LET’S TALK

What could we
build together?

Interested in buying our products or IP, or licensing or leasing our designs? Contact Jonathan directly with the product and arrangement you have in mind. Individual and company inquiries are welcome. Email is preferred.

Charlotte, North Carolina · United States

Prepare your inquiry

This opens a draft in your email app. Nothing is sent until you send it.

Hot Weld revised design

Approved color concept showing the recessed, articulating infrared temperature sensor and integrated red aiming laser. The head aims up, down and side to side. This is a design visualization; electronics, sensor-head integration, and performance validation remain in development.

Approved revised Hot Weld color concept showing the articulating infrared sensor and red aiming laser.

Ergonomic TIG handle

Issued U.S. Design Patent D969,580 S · November 15, 2022. These are the actual patent drawings, not product photographs.

Ergonomic welding handle patent drawing, Figure 1.Download all drawings ↓

Privacy

This website does not use advertising trackers or save your inquiry form entries to a website database. The inquiry form prepares an email draft in your own email app.

Information you choose to email to Principal Thinking is used to respond to your inquiry. Website hosting may process standard access logs. Contact jonathan@principalthinking.com with privacy questions.