We illustrate herewith a very simple little device for attaching
traces to the single tree. It forms a secure fastening which may be
instantly attached, and which, by its construction, is prevented from
wearing out rapidly.
[Illustration: Figs. 1 and 2]
Fig. 1 shows the cockeye attached to the single tree, and Fig. 2
exhibits parts in section, displaying the construction very clearly.
The yoke is of the usual pattern. Swiveled to it is a long loop, which
is chambered out to receive a spiral spring which acts upon a plunger.
The latter is provided with a follower having a semicircular notch,
which corresponds in form to the inside of the end of the loop. The
follower also has guiding lips which extend over the sides of the
loop. Through the yielding of the spring, the space between the
follower and loop adjusts itself to studs or hooks of any size.
Patented December 12, 1876, through the Scientific American Patent
Agency. For further particulars, address the inventors, Messrs. F.W.
Knapp and C. Schallhorn, Fiddletown, Amador county, Cal.
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