GB Patent: 189,207,180 - Steam-engine indicators


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GB Patent: GB-189,207,180

Steam-engine indicators

Patentees:

John Buchanan (exact or similar names) - Glasgow, Scotland

Robert McKinnell (exact or similar names) - Glasgow, Scotland

USPTO Classifications:

Tool Categories:

propulsion and energy : steam apparatus : steam engine indicators

Assignees:

None

Manufacturer:

Hannan & Buchanan - Glasgow, Scotland

Witnesses:

Unknown

Patent Dates:
Granted:	Apr. 14, 1892

Patent Pictures:

Espacenet patent
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Vintage Machinery entry for Hannan & Buchanan

Description:

"This invention relates to indicator for taking graphical diagrams of the power exerted in steam, &c., engines, and consists in a method of securing the helical pressure springs over and outside the indicating cylinder, instead of inside...The spring b is outside the cylinder A, being attached by screw caps to a nut B2 on a long piston-rod, and to a cross-bar a bolted on the base A1, this cross-bar serving also as a guide for the rod. The arrangement may be modified. In a form described by the Provisional Specification, the part a is carried by the movable head A2 on the cylinder. A double lever A3 may be used, engaging between collars on the piston-rod."