We claim, 1st, the arrangement and combined action of the two frames, so that when any permanent obstruction comes against any of the plows the frames will disconnect, and the back frame ride or move up on the front one and thus avoid breakage, substantially as described.
2d, Also a frictional spring hook upon the tongue or tongue frame, for catching or holding upon a cross bar of the rear frame so that the two frames will not disconnect until the pressure upon the plow or plows exceeds that for which the hook has been adjusted, substantially as described.
72,028.--HOSE SHIELD.--John A. Hasse, Philadelphia, Pa.
I claim the combination of the floor or footway, C, with the side pieces, b b, of a sectional hose bridge, constructed substantially as described.
72,029.--SKY ROCKET.--John W. Hadfield, Newtown, N.Y.
I claim the application of detachable wings to a sky rocket, through the medium of a collar or band, arranged so that the wings may be detached from the collar or band, or the latter detached from the rocket, substantially as shown and described.
72,030.--SKY ROCKET.--John W. Hadfield, East Williamsburg, N.Y.
I claim the attachment to a sky rocket of three or more sticks, at equal distances apart, substantially in the manner and for the purpose set forth.
72,031.--MACHINE FOR REFITTING CONICAL VALVE.--Chas. F. Hall, Brooklyn, N.Y.
I claim, last, A milling tool with one or more cutters attached to one or more arms or longitudinal sections of a cone, whether straight or oblique, whereby conical valves of different sizes may refitted, constructed substantially as shown and described.