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Bernhard Gratz
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Individual
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Individual
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Publication of GB190813791ApublicationCriticalpatent/GB190813791A/en
13,791. Grõtz, B. Dec. 7, 1907, [date applied for under Section 91 of Patents &c. Act, 1907]. Gas and like engines.- The valves are kept cool by means of the construction shown. The hollow valve stem a ends in a plate b which is covered by a plate c. The plate c may screw on to the valve stem, or it may be slipped loosely over the stem and secured by a nut. The joint g may be formed as a rim and groove as shown, or the part b may be formed with a conical seating with which the part c engages. The interior of the spindle is in communication with the hollow valve through the slot i.