Abstract: A window scraper and method are provided wherein a scraping brush has filaments and wherein the tips of the filaments are moved linearly across the work surface as the brush rotates. Preferably, the brush has brass filaments trimmed to a point, and the brush drive mechanism moves the brush in an oscillating arcuate path while cams and cam surfaces simultaneously cause the brush to move toward and away from the work surface to maintain the tip of the filaments in substantially the same plane at a constant distance and pressure relative to the work surface. A novel brush has filaments trimmed to a point, an axle of rotation and cams to engage cam surfaces. The device includes an oscillating drive mechanism, a slot to rotatably and slidingly receive the brush axle, and cam surfaces to engage the brush cams and cause the brush axle to slide in the slot, causing the brush to move toward and away from the work surface during portions of the rotating brush sweep.

Abstract: The trocar is provided with a leaf spring in the housing which abuts a collar on a protective tube which surrounds the sharp tip of the stylet. A spring finger extending from the leaf spring is actuated by a slider when the two housings of the trocar components are squeezed together. The spring finger initially lifts the leaf spring from the collar to release the protective tube for sliding proximally while the collar subsequently lifts the spring finger from the shoulder of the slider to prevent a re-release of the leaf spring when the protective tube 16 is moved back into the extended position.

Abstract: A device for gathering and retaining a portion of a fabric article such as an article of clothing, includes a first, elastic ribbon- or cord-shaped element fastened at one end to the article to be gathered within a seating or sleeve provided on the fabric article. The first element is also attached at at least two points to a second ribbon- or cord-shaped element such that the overlapping portion of one of the elements is longer than that of the other element. A rigid lamina is provided attached to the larger overlapping portion to engage the front edge of the fabric sleeve, thereby securing the fabric in the gathered position.