Abstract: A readers clip for holding the pages of a book open at a desired place comprising an integral wire article having a straight back tine, a front page retainer having book gripping portions and lateral page holding portions, and a coil spring portion connecting the upper end of the tine with the upper end of the page retainer biasing the tine and page retainer together. The tine fits down the spine of a book while the front page retainer extends downwardly along the front of the book spine with the lateral portions overlying and holding adjacent open pages at a desired location in the book.

Abstract: A security door guard in the form of a foldable and telescoping brace connected between the inside face of a door and an adjacent supporting surface such as a wall. The brace includes two tubular sections hinged in the middle and connectible at opposite ends with the inside face of the door and the adjacent wall surface to provide a rigid prop or brace to prevent unauthorized opening of the door. The section of the brace connected with the door includes a telescoping portion which is shown in two forms for allowing partial opening of the door from the inside.

Abstract: An electrical generator system including a waterwheel apparatus as a prime mover. The waterwheel apparatus as a plurality of pivoted buckets mounted in circumferentially spaced relation around a central hub and having an outer rim provided with a ring gear driving a pinion gear on the generator shaft for obtaining a high rotational speed in a generator from a relatively slow turning waterwheel. The waterwheel buckets each fold outwardly to hold a maximum quantity of water as the bucket reaches approximately the horizontal center line of the wheel on the downwardly moving side of the wheel while each bucket empties at the vertical center line of the wheel as the bucket passes the bottom side and thereafter folds inwardly as the bucket moves upwardly and over the top of the wheel.

Abstract: A stiff-leg crane for use in handling loads in the erection of buildings and the like, including a base rotatable 360.degree. on a bearing, a vertical mast rigidly mounted at a lower end at the center of rotation of the base, a boom pivoted at a foot end along one end of the base, boom support and load handling lines from the top of the mast to the boom, a pair of adjustable lay leg mast braces for boom and mast support from either the crane base or the structure being erected by the crane, and means for securing the lower free ends of the lay legs to either the base or the structure being erected. The lay legs are adjustable both in length and the angle between the lay legs and the mast. Additionally the lay legs are fully rotatable 360.degree. about the mast and may swing between the mast and the boom for relocation from one side of the mast to the other without interference with the boom or the boom support and load handling lines.