1 · Heating
How was energy delivered to the wound hair, and how was the heating element arranged? Temperature-control claims require the actual technical specification.
Explore the six branches
01 · Origins & the Nessler System02 · Early Competing Systems03 · Winding Techniques04 · Machine Design & Salon Equipment05 · The Chemical Cold Wave06 · Modern Digital Perm
Four engineering challenges
What made a permanent-wave machine usable?
Historic machines did more than supply heat. They had to position hair, accommodate heating elements, support the apparatus and reduce the risk of contact between hot equipment and the scalp. These functions should be examined separately before attributing an invention to a particular person.
2 · Support
How were heated components suspended, balanced or held in position during treatment?
3 · Protection
What separated hot parts from the head? Patented protective features are not proof of modern safety standards.
4 · Salon operation
How could a hairdresser access individual strands, attach appliances, inspect the treatment and maintain the machine?
Primary source · US 1,693,515 · 1928
Marjorie Stewart Joyner: the supporting apparatus
Joyner’s patent documents an arrangement for supporting and positioning multiple hair-waving devices around a client's head. The apparatus includes a supporting structure, suspended implements and elements intended to help manage the application of heat. The design question is therefore how the equipment is organised around the person, rather than who first devised permanent waving itself.
SupportFramework positioned above and around the head
SuspensionMultiple waving implements arranged for individual strands
Contact managementClamping and protective elements described in the patent
Inspect the original: Joyner, US Patent 1,693,515 – specification, claims and drawings ↗
The original patent is linked rather than embedding an unverified third-party image. This avoids incorrect reproduction credits or a misleading machine photograph.
Two patents, different technical questions
| Josef Mayer (1927) | Marjorie Stewart Joyner (1928) | |
|---|---|---|
| Design emphasis | Heater construction and its relation to wound hair | Supporting and arranging several waving implements |
| Engineering question | How can the heating appliance be applied around the wound strand? | How can multiple implements be positioned around the head? |
| Primary document | US 1,619,794 | US 1,693,515 |
| What the patent alone does not prove | Extent of manufacture or adoption | Extent of manufacture or adoption |
From invention to salon equipment
To reconstruct the history of an actual salon machine, we need more than a patent. An advertisement can show how a manufacturer presented a product; a catalogue may identify its components; a dated photograph can document an installation; and a trade journal may describe practical use. Each source answers a different question.
Research status: The patents provide a firm starting point for Mayer and Joyner. Specific performance claims, sales figures and links to later commercial systems should not be inferred without additional contemporary documentation.
Find manufacturers, advertisements and trade journals → · Consult the evidence register →
Research status: the distinction between documented patent claims, technical interpretation and unresolved questions is intentional. A named system is not automatically evidence of a unique invention.
The weight and handling problem
Early electrical waving equipment had to be held near the head for extended treatments. Designers experimented with suspensions, clamps, holders and protective elements to make the procedure workable.
Marjorie Stewart Joyner: a different design approach
Joyner’s US Patent 1,693,515 (1928) describes a supporting dome and suspended electrically heated waving devices, including protective and clamping arrangements. This is a design for organising the treatment apparatus, not simply another winding pattern.
Charles Frederics: machines as commercial systems
Frederics belongs in the study of branded salon machinery and professional distribution. A precise patented innovation should not be asserted until an original machine, catalogue or patent can be securely attributed.
From workshop device to salon system
Machines depended on accessories, operating procedures, electrical supply, maintenance, training and sales networks. Those factors shaped commercial adoption but need evidence beyond patent drawings.
Research dossier · Evidence and open tasks
Original sources still needed
- Verified Joyner portrait with reuse permission
- High-resolution Joyner patent figures
- Frederics catalogue and machine photographs