Stevens Rocking Grate Bar, Patent Model


This model was submitted to the U.S. Patent Office with the application for the patent issued to Francis B. Stevens, November 11, 1879, no. 221430.

The model represents a grate surface formed of ordinary fish-bellied grate bars on each of the lower ends of which two journal bearings are formed to fit into and rest in two corresponding rounded socket bearings. The bar is made to rock in each of these bearings alternately to the right and left, so that the upper part of the grate overhangs the right-hand socket when rocked to the right, and the left-hand socket when rocked to the left. That the upper part of the grate bar will overhang the center on which it turns is the improvement claimed by the inventor.


This description comes from the 1939 Catalog of the Mechanical Collections of the Division of Engineering United States Museum Bulletin 173 by Frank A. Taylor.

Date Made: 1879Patent Date: 1879-11-11

Inventor: Stevens, Francis B.

Location: Currently not on view

Place Made: United States: New Jersey, HobokenAssociated Place: United States: New Jersey, Hoboken

See more items in: Work and Industry: Mechanical and Civil Engineering, Bulletin 173, Engineering, Building, and Architecture, Work, Industry & Manufacturing


Exhibition Location:

Related Publication: Frank A. Taylor. Catalog of the Mechanical Collections of the Division of Engineering United States National Museum, Bulletin 173

Data Source: National Museum of American History

Id Number: MC.309217Catalog Number: 309217Accession Number: 89797Patent Number: 221,430

Object Name: furnace grate, modelpatent model, furnace grateObject Type: Patent Model

Physical Description: cast iron (overall material)Measurements: overall - from catalog card: 6 1/2 in x 10 1/2 in x 1 7/8 in; 16.51 cm x 26.67 cm x 4.7625 cmoverall: 4 in x 6 3/4 in x 11 in; 10.16 cm x 17.145 cm x 27.94 cm


Record Id: nmah_847659

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