This page separates what the source dossier on the Schaeffer steam generator asserts from what it demonstrates. The distinction matters because archive dossiers and patents are frequently read as if they were evidence of function, and they are not.
The claim side
| Item | Status in the available record |
|---|---|
| A steam generator attributed to an inventor surnamed Schaeffer | Asserted by the dossier's existence and title |
| The device's operating principle | Stated: water-hammer/cavitation shock waves in a distended water chamber (patent and press article) |
| Any performance figure (steam rate, efficiency, input power) | Reported: Battelle 97.3–99.0% (8 runs); a reported 117% reading; McDonald 1.09–1.30; Zumwalt figures exceeding nameplate motor efficiency |
| Any patent number or filing date | US Patent #3,791,349, granted February 12, 1974 |
| Any press coverage establishing dates or context | NewsReal (June 1977) by Tom Valentine; Infinite Energy (July–Aug 1995) by Michael Huffman |
Eight figure images (00fig1a–00fig8, 0nr2.jpg) |
Present as file references |
The claim side is therefore almost empty. What exists is a record of a record: an archive page, a topic tag, and a set of illustrations.
The evidence side
| Evidence type | Present? |
|---|---|
| Independent measurement of steam output | No |
| Calorimetric input-energy measurement | No |
| Third-party test or replication | No |
| Peer-reviewed publication | No |
| Patent grant (which would establish disclosure, not performance) | Not present in the available material |
| Archive listing | Yes — but this is provenance, not evidence |
Why the gap matters
Two common errors are worth naming explicitly.
A patent is not proof of effectiveness. Patents are granted on novelty, utility as disclosed, and enablement. They are not examined for whether the disclosed device actually performs as claimed, and no working prototype is required. A patent number in a dossier would establish that someone filed paperwork, nothing more.
An archive listing is not proof of effectiveness. the source archive collects and reproduces material. Collection is an editorial act. It carries no implication that the collected claim has been tested, replicated, or endorsed.
What would change the assessment
The following would move this from an unassessable record to an assessable one:
- A stated mechanism, so that the claim can be checked against thermodynamics.
- Any performance figure with its measurement conditions.
- A named independent test, with the test protocol and the identity of the tester.
- A replication by a party with no stake in the outcome.
None of these are present. The dossier's capture is also flagged as possibly incomplete, so some of them may exist on the live page and be missing from the ingested copy.
Verdict
Partially assessable, with the extraordinary claim unverified. The source documents a stated mechanism, a granted patent, and several reported efficiency measurements, including a Battelle test reporting 97.3–99.0% efficiency and a reported 117% reading. The over-unity claims (efficiencies above 100%) rest on barrel-calorimetry tests that the testers themselves flagged as uncertain and recommended verifying with a dynamometer; they are not independently replicated. The conventional-efficiency claim is plausible; the over-unity claim is not established.
Related
- Schaeffer Steam Generator — the device.
- Schaeffer (steam generator inventor) — the attributed inventor.
- Steam Generator Claim — the general class of claim.
- source-types — how archive dossiers differ from other source kinds.
Further reading
- US Patent 3,791,349 (1974): The Schaefer/Sonaqua Steam Generator and Its Water-Hammer Rotor — the patent text for US 3,791,349. It documents the grant and the proposed water-hammer mechanism, but neither independent claim recites an efficiency, so the performance figures tabulated above do not originate there.
- Cavitation Heat Generators for Building Heating: The 2017 Ved, Nikolsky, Oliynyk and Lipeev Study of Series Operation and Vibration-Based Control — a 2017 open-access paper on cavitation heat generators installed for building heating. It frames their performance as an advantage over gas-fired district heating, with no claim of output exceeding input, which is a useful contrast to the over-unity readings above.
Source notes & attribution
- https://rexresearch.com/schaeffe/schaeffe.htm