What the invention claimed is:
1. A bicycle head tube and ball bearing mounting arrangement comprising a head tube, said head tube having two expanded receiving portions respectively disposed in top and bottom ends thereof, and two ball bearing assemblies respectively mounted in said expanded receiving portions of said head tube in reversed directions and adapted to support a handlebar stem and front fork assembly in said head tube, for enabling said handlebar stem and front fork assembly to be rotated relative to said head tube; wherein two gasket rings are respectively mounted in the top and bottom ends of said head tube to support said ball bearing assemblies in said expanded receiving portions of said head tube, said gasket rings each having a curved inner diameter fitted over the bottom edge of the respective ball bearing assembly to prevent direct contact of the bottom edge of the respective ball bearing assembly from direct contact with the respective expanded receiving portion of said head tube.
2. The bicycle head tube and ball bearing mounting arrangement as claimed in claim 1 wherein said gasket rings are split rings.
3. The bicycle head tube and ball bearing mounting arrangement as claimed in claim 1 wherein the inner diameter of each of said gasket rings is tapered.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1-100. (Cancelled)
101. A method for the production of ammonia, comprising the steps of:
a) contacting steam with a reactive metal in a reactor to reduce at least a portion of the steam and form hydrogen gas;
b) contacting air with said reactive metal to combust oxygen contained in said air and form a nitrogen gas stream;
c) extracting a gas stream from said reactor comprising hydrogen gas and nitrogen gas; and
d) contacting said gas stream with a catalyst to form ammonia.
102. A method as recited in claim 101, wherein said gas stream comprises a molar ratio of hydrogen gas to nitrogen gas of about 3:1.
103-110. (Cancelled)
111. A method as recited in claim 101, comprising the step of adjusting the ratio of said steam to said air to adjust the ratio of said hydrogen to said nitrogen gas.
112. A method as recited in claim 101, wherein said reactive metal comprises iron.
113. A method as recited in claim 101, further comprising the steps of:
(e) terminating said injection of steam; and
(f) contacting a metal oxide in said reactor with a reductant to reduce said metal oxide back to said reactive metal.