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4,266 · Hyatt · "Illuminating Vault Cover" · Page 2
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    Having thus fully described the nature of my improvements in the illuminating vault-cover, what I claim therein is new, and desire to secure by Letters Patent, is--
    The combining with the covering plate B B, a series of glasses of any suitable form, or of lenses, such as are shown at A A; said combination being effectively substantially in the manner described, by the aid of laminæ
of wood, or of soft metal, as shown at C C' and the glasses, or lenses, being defended from injury by knobs, or protuberances, as herein set forth.
THADDEUS HYATT.
Witnesses:
    WM. B. AITKEN,
    ALFRED B. KETCHAM.
[First Printed 1914.]