Abstract: In a process and apparatus for forming parts from a sheet of metal stock material so that they can be separated by a shake-and-break operation, elongated holes are punched in the sheet to separate the first part from the second part except at at least one shake-and-break location. At the shake-and-break location, a frusto-conical shape punch and die punch an opening on either side of a center tab connecting the parts. The wider ends of the frusto-conical shape holes face the tab, and the narrower ends adjoin the elongated holes and have the same width as such holes. In such a manner, the points where ends of the tab connect to the first and second parts are located in recesses located to the outside of the edges of the elongated holes. When the pieces are subsequently separated in a shake and break process, any residual burrs from where the tabs separate from the parts are located in the recesses, rather than along the edges of the part, and do not need to be removed.

Abstract: A roped hydraulic elevator has a hydraulic jack whose upper end, preferably the plunger end, is secured to an upper region of the elevator hoistway, and whose lower end is free to move vertically. A first sheave is supported by the lower end of the jack, and at least one overhead sheave is supported in the upper hoistway region. A rope has one end secured to the hoistway near the top of the hoistway. The rope extends downwardly, around the first sheave, upwardly from the first sheave to the overhead sheave, and downwardly from the overhead sheave to the car, where it is secured. Preferably, a counterweight is supported by the lower end of said jack. Also, preferably one or more guide rails and guide shoes are used to guide the movement of the jack lower end and counterweight. The elevator is relatively simple in design, and the roping system produces a 2:1 ratio of car movement to jack movement, which allows the use of a shorter jack or, alternatively, a greater range of car travel.

Abstract: An elevator cab is formed of a plurality of adjacent panels. The adjoining ends of the panels are locked together by a J-shaped latch member on one panel, and a hook member on the other panel. The J-shaped members include a first leg portion extending rearwardly from the forward wall of the panel, and a second leg portion extending at least generally parallel to the forward wall towards the opposite end of the panel. The hook shaped end includes first and second hook portions designed to abut the first and second leg portions of the J-shaped latch members, and a third hook portion extending from the second hook portion at an acute angle relative thereto. With the aforesaid structure, the panels may be assembled from inside said cab, with the J-shaped members and hook shaped members of adjacent panels forming an interlocking joint.