Wheelock Valve and Valve Seat Model

Description:

This is a nicely made model of the valve and valve seat patented by Jerome Wheelock, of Worcester, Massachusetts, September 22, 1885, no. 326820.

The model represents a wide gridiron slide valve assembled on a skeletonized taper plug, which serves as the valve seat and supports the rock shaft connected to the slide by links or “toggles.” The whole assembly is designed to fit into a taper hole bored into the cylinder block and connected by suitable ports to the cylinder. The advantage of this arrangement over ordinary plug valves is that it does not require that a valve seat be formed within the large cylinder casting, and it permits the delicate fitting of the valve to the valve seat to be performed at a work bench or upon a machine away from the engine.

The complete Wheelock valve gear (U.S. patent number 326819) consists of one steam valve and one exhaust valve at each end of a cylinder with the rock arms of the exhaust valves permanently connected to the eccentric, so that the valve is at rest during part of the travel of the eccentric, while the steam valves are connected through a detachable latch so that they may be detached and closed quickly at any point during the stroke of the piston.

Reference:

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: 1885

Location: Currently not on view

Place Made: United States: Massachusetts

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

Exhibition:

Exhibition Location:

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

Credit Line: Gift of Franklin Machine Company, Providence, R. I.

Data Source: National Museum of American History

Id Number: MC.310251Catalog Number: 310251Accession Number: 108073

Object Name: valve with plugvalve with plug, engine steam valve

Measurements: overall: 1 1/2 in x 6 1/4 in x 1 1/2 in; 3.81 cm x 15.875 cm x 3.81 cm

Guid: http://n2t.net/ark:/65665/ng49ca746a6-8c03-704b-e053-15f76fa0b4fa

Record Id: nmah_847367

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