Keystone set

Details Keystone set Keystone set

1990-10-09

1991-12-03

Murtagh, John E.

Static structures (e.g., buildings)

Trapezoid-shaped block

52245, 52608, 52 89, 110335, 110337, E04C 338, E04B 132, F27D 102, F23M 506

Patent

active

050690159

ABSTRACT:
The invention relates to a keystone set for installation in the transition region between two sections of an arch-shaped support structure, the set consisting of two transition stones, between which at least one keystone is axially insertable.

REFERENCES:
patent: 307155 (1884-10-01), Williams
patent: 693826 (1902-02-01), Bottger
patent: 1230441 (1917-06-01), Stevens
patent: 1242669 (1917-10-01), Erken
patent: 1648363 (1927-11-01), Reintjes
patent: 2561933 (1951-07-01), Longenecker

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