Appeal No. 2003-0144 Page 6
Application No. 09/400,932
the bar means allows further flexible manipulation of the hose to guide the delivery
concrete. Using the bar guide, the workers my assume a more physiologically
comfortable and secure stance than would be possible if ropes or chains were used.
Metzger states (column 4, lines 36-40) that;
the depiction of FIG. 4 is of course figurative rather than literal and it is evident
that horizontal and pumped delivery of concrete through the hose and different
numbers of workers may be used in a hose gang employing the guide of the
invention.
Henderson's invention relates to devices for sustaining speaking or sound
transmitting tubes and is especially well adapted for the speaking tubes used in
connection with the phonograph, graphophone and kindred machines. Henderson
teaches (page 1, lines 13-28) that:
Heretofore it has been the practice to hold the speaking tube with one hand
while dictating to the machine. This very often is very inconvenient, and allows
the operator the use of only one hand for handling papers or for other uses. It is
very desirable often that the operator may have the use of both hands, and it is
with the foregoing difficulties in mind that this invention has been devised to
remove them and to give to the operator the freedom of both hands while
dictating to the machine, and also to avoid the necessity of picking up the tube
when the dictation is to be made and to lay it down when the dictation is to be
suspended.
Figure 1 of Henderson is a perspective of a phonograph speaking tube 1 with his
invention applied thereto. Figure 2 is a similar view on a smaller scale, and in which is
also shown by dotted lines two of the many positions to which the tube can be adjusted.
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