Google Patents, 2026-10-08 (Investigator, STEP I)

Site: https://patents.google.com/ (searched in Chrome via the site's own query endpoint; patent pages then saved with curl to research/pages/gp-*.html) Queries: inventor=Sinclair Tousey before:priority:19400101; inventor=Tousey before:priority:19400101; inventor=Sinclair Tousey (all dates); inventor=Sewall Cabot before:priority:19300101; inventor=Joseph T Shaw q=x-ray before:1930; inventor=Cabot q=(x-ray)(high potential)(direct current) before:1925. Result: positive.

What was found

The project folder holds no patent, and the book's preface only says it describes inventions "patented and unpatented" [read]. Google Patents lists 20 documents under the inventor name "Sinclair Tousey". Three of them (GB189716349A, a stamp-affixing machine of 1897, and the 1860s-80s publisher items) belong to the older Sinclair Tousey (1815/1818-1887), founder of the American News Company. That man is most likely the physician's grandfather; the physician's father was John Euart Tousey [read: book dedication]. The physician's patents are listed below. [web] https://patents.google.com/?inventor=Sinclair+Tousey

The "family" links for the CA and FR documents are inferred from title, inventor and date only. They are not confirmed; an Espacenet family check was not reached.

Passages that bear on the claims (OCR of the patent text, Google Patents)

• US1100037 (X-ray tube, filed 1911). Its stated object is "to secure better definition" by "utilizing only the direct rays coming from a very small point on the anode (anticathode)" while "avoiding the action of secondary rays which, in X-ray tubes as ordinarily constructed blur the image by producing a penumbra". The tube wall outside a window area is "lead-glass or ... any suitable material sufficiently opaque to X-rays whether primary or secondary". [web] https://patents.google.com/patent/US1100037A/en ; PDF https://patentimages.storage.googleapis.com/83/bf/22/13bae5f1234a55/US1100037.pdf . This is the lead-glass-bulb design the book calls the "Tousey tube" [read: deep read section 11]. Its filing date (Feb 1911) is the documentary anchor for the Tousey-versus-Cornell-tube priority dispute (claim 2). Geyser's Cornell tube is dated 1905 by Wikipedia (see 2026-10-08-wikipedia.md).
• US1372110 (X-ray apparatus, filed 1919): "means for improving radiographs by reducing the quantity of secondary rays, reaching any given part of the plate, from the glass wall of the X-ray tube". A "radiating cellular diaphragm" uses trumpet-shaped cells whose "walls form a truncated hollow cone whose apex is at the focus point upon the anticathode". [web] https://patents.google.com/patent/US1372110A/en ; PDF https://patentimages.storage.googleapis.com/c2/2a/30/538113a9dcc36e/US1372110.pdf . This is the patented form of the "radiating cellular diaphragm" in the radiography chapter (PDF 834-843) [read: deep read 3rd section, 6]. It bears on Tousey's secondary-ray principle (claim 5).
• US1535359 (X-ray filter or screen, filed 1920): a filter that varies the intensity across the subject "so that equal radiographic effect may be secured through all parts of the subject, despite ... different thicknesses and densities". This is a compensating filter. [web] https://patents.google.com/patent/US1535359A/en
• US1370858 and US1510424 (film carriers) both begin by citing his own book: "Medical Electricity Rontgen Rays and Radium, second edition ... 1915, pages 862 and 863, there is described a vertical film carrier for use in the mouth". [web] https://patents.google.com/patent/US1370858A/en . US1517767 adds that removing the film without touching it reduces "the liability of infection from the saliva of the patient". These are the carriers of the deep read's section C (dental technique) [read].
• His residence changes across the patents: New York (1911), Brooklyn and Westhampton Beach (1919), Garden City (1921). This matches the 1937 obituary ("of Garden City") [web: nytimes, see that note].

Cabot and Shaw (claim 6, the constant-potential generator)

• Sewall Cabot of Brookline, Massachusetts, filed two "Electric conversion" patents on 1912-08-22: US1112436 (granted 1914-10-06) and US1191759 (granted 1916-07-18). They cover converting alternating current to direct current "by synchronous commutation" from a supply on "a substantially constant potential basis". A later one, US1554711 (filed 1922), was assigned to General Electric. [web] https://patents.google.com/patent/US1112436A/en , https://patents.google.com/patent/US1191759A/en , https://patents.google.com/patent/US1554711A/en . None of the three mentions x-rays or Tousey in the text checked (grep for "x-ray", "Roentgen", "Shaw"). Cabot's earlier patents (1904-1907) are in wireless telegraphy (Stone Telegraph and Telephone Co.). That fits the book's description of Cabot and Shaw as wireless engineers [read: p.740-747].
• The search for Joseph T. Shaw as an x-ray inventor found nothing relevant (query above).

How this bears on the inventor's points (no verdict)

• The patents give Tousey's own principle in legal form: x-ray image quality and safety depend on cutting off secondary radiation from the glass wall and from scatter. Three patents (tube, cellular diaphragm, compensating filter) all apply that one idea, which runs through claims 2 and 5.
• The dates bear on the priority claims: the Tousey tube was filed in February 1911, and Cabot's converter was filed in August 1912, after Tousey's 1910 first edition. The order is consistent with Tousey's account that Cabot read his book first. It does not by itself show that he did.

Not downloaded: the patent PDFs. Their URLs are listed above for research/files/ if the owner approves downloading them.