Abstract: The disclosure relates to an improved bark tool for the removal of tree bark from logs in the lumber and papermaking industries, wherein a novel structural tool and connection are disclosed.

Abstract: An improvement in an atomic or molecular magnetic quantum state selector wherein the bore and gap spacing may be adjusted or calibrated precisely after assembly by providing adjustable segments in the supporting structure surrounding the pole tips. The adjustable bore and gaps make it feasible to construct small size state selectors with precision bore and gap dimensions which have heretofore been difficult or impossible to realize due to the unrealistically small dimensional tolerances which would be required in previous conceptions of these devices.

Abstract: A self feeding floating fish feeder for distributing fish food on a body of water from a hopper on the bank of the impoundment.

Abstract: Ground water containing ferrous compounds is first treated with aluminum sulfate before aeration followed by lime addition after aeration to produce an iron-aluminum sludge possessing an oxidative capacity. Portions of the sludge are recycled back to utilize the oxidative capacity of the sludge. Chlorine is added after the oxidative capacity of the sludge has been utilized. An improved oxidation and removal of iron is obtained, yielding a treated water low in iron content with decreased requirements for chlorine.

Abstract: A method of making a halftone contact screen having a plurality of discrete different optical transmittance levels by making multiple relative translations of light-sensitive material under and in close contact with a ruling mask while exposures to light through the ruling mask are made between the translations. The mask comprises a thin flat plate having an array of parallel periodic equal width opaque straight bars separated by an array of parallel equal width transparent bars. In a first process, translations are normally made perpendicular to the parallel of the bars. Two-dimensional or dot halftone contact screens are made by repeating the process wherein the light-sensitive material is rotated relative to the ruling mask, in its own plane, at an angle greater than zero to the direction of the ruling bars during the first process. Using the single process creates a line halftone contact screen; adding the second process creates a dot halftone contact screen.

Abstract: An improvement in an atomic or molecular frequency standard, more particularly, the atomic hydrogen maser, by the use of electrode structures circumferentially placed around the exterior of the atomic or molecular storage vessel and in a surface of revolution about the initial atomic hydrogen beam path. These electrodes allow maser action in maser devices of physical dimensions much smaller than those formerly possible.

Abstract: The invention relates generally to a novel arrangement of fixed flat plate solar reflectors and collectors whereby an increased efficiency is obtained during year-long use.

Abstract: A trap setting device especially useful for setting beaver traps. A fixed upward pointing hook is attached to the lower end of a tubular frame, and a closing downward pointing hook is attached to a movable rod which is forced downwardly through the frame by a ratchet mechanism with great mechanical advantage. The ratchet device provides a stop whereby closing force is maintained between the hooks while the operator sets the trigger in the trap. Force is removed from the closing hooks by twisting the ratchet rod and withdrawing it and the attached upper hook.

Abstract: A portable desk combining storage capability of an openable container for legal size and other conventional folding files, and for papers and printed forms in general, and a writing surface with clamping system devised to hold multiple copies of pressure-sensitive forms with minimal pressure. The article consists of a slidable compartmented receptacle movably positionable to (a) either side of a covering writing surface equipped with a clamping system, or (b) a position directly below the writing surface for relatively moisture resistant storage of forms, papers, and writing equipment. The receptacle is equipped with an integral loop of like material at one end for hand carrying and storage on wall hooks. The clamping system is especially suited for pressure-sensitive duplicating forms. The article may be suitably made of plastic of various kinds, with a clamping means made of stamped sheet metal.