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257,714 · Hyatt · "Illuminating Vault-Cover or Grating" · Page 1
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UNITED STATES PATENT OFFICE
THADDEUS HYATT, OF NEW YORK, N. Y., ASSIGNOR TO
ELIZABETH ADELAIDE LAKE HYATT, OF SAME PLACE.
ILLUMINATING VAULT-COVER OR GRATING.
46 of 67
SPECIFICATION forming part of Letters Patent No. 257,714, dated May 9, 1882.
Application filed April 14, 1882. (No model.)
To all whom it may concern:
Be it known that I, THADDEUS HYATT, a citizen of the United States, and a resident of the city, county, and State of New York, have invented certain new and useful Improvements in Illuminating Vault-Covers or Gratings and Building Constructions made therefrom, of which the following is a specification.
In the accompanying drawings, making part of this specification, like letters refer to like parts in all the figures.
Figure 1 represents a "concrete light" or grating made of artificial stone and set with glasses. A A show the stone or concrete grating; B B, the glasses; a a, gutters or water-courses formed in the concrete; b b, tie metals, or the metallic tensional strength of the concrete grating.
Fig. 2 represents the concrete light faced with a soft-metal plate. C C show the soft-metal plate.
Fig. 3 represents the soft-metal plate C C before being attached to the concrete grating. a' a' show gutters or water-courses cast or formed in the surface of the plate; c c, attachment pieces or rings cast or formed upon the under face of the plate.
Fig. 4 represents an enlarged cross-section of Fig. 2 on the line x x.
Fig. 5 represents a cast-iron grating covered with concrete, faced with soft metal, and set with glasses. D D show the cast-iron grating; A" A", the concrete; C C, the soft-metal surface-plate.
Fig. 6 is an enlarged cross-section of Fig. 5 on the line y y. B" B" show the shoulder and neck of the glasses where they enter the light-openings of the grating and are cemented fast.
Fig. 7 is a full-size view of a portion of the lead plate.
The object of my invention, with respect to the illuminating-gratings called "concrete lights," is to make them ornamental by means of a channeled surface, which at the same time aids to free the face of the glasses from dust and dirt.
The object of my invention broadly, as to illuminating-gratings faced with soft metal, is to lessen the cost of making such lights, the purpose of the gutters made in the face of the soft-metal plate being the same as with respect to gutters made in the face of the concrete grating.
Fig. 2 represents the cheapest mode of
construction, and is the manufacture I prefer. In making a concrete
light such as Fig. 1 represents I cast the concrete in a mold so
formed as to leave the face of the concrete guttered, as shown, when
the concrete is removed from the mold; and I prefer to cast the concrete
grating in a mold formed with cores to produce the openings or light-holes
to be set with glasses after the concrete grating has become set and hard.
The tie metals I place in the mold with the plastic concrete. In making a
concrete light faced with soft metal, as shown by Fig. 2, I place the metal
plate face downward in the mold, and then put in the plastic concrete upon
it, adding either tie metals or a cast iron grating. The soft-metal
facing-plate represented by Fig. 3 I prefer to make of lead, and I make
the holdfasts c c preferably in the form of rings, as shown.|
The mode of fastening a soft metal foot-surface to illuminating-gratings by means of hold-fasts upon the under face of the soft-metal plates in combination with concrete I find to be cheaper and more convenient than my former method of attachment by means either of screws or "sweating," and to be equally efficacious.
What I claim as my invention, and desire to secure by Letters Patent, is--
1. A concrete light or illuminating stone grating formed with a channeled foot-surface, substantially as and for the purposes herein set forth and illustrated.
2. A concrete light or illuminating stone grating formed with a soft-metal foot-surface, substantially as and for the purposes herein set forth and illustrated.
3. A cast-iron illuminating-grating, combined with a soft-metal facing-plate and concrete, substantially as and for the purposes herein set forth and illustrated.
4. A soft-metal perforated facing-plate formed with holdfasts and a channeled face, in combination with an illuminating-grating, substantially as and for the purposes herein set forth and illustrated.
T. C. BRECHT,
LLOYD F. KELEHER.