The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 21, 1976
Filed:
Oct. 15, 1974
Hans R Zollinger, Geroldswil, CH;
H. A. Schlatter AG, Zurich, CH;
Abstract
Welding apparatus for welding railroad rails is movable plus or minus approximately two feet to compensate for the position of the continuous rail, i.e., the already welded together rail sections, as the latter is removed from the welding apparatus. The welding apparatus also is provided with a vertical clamping and aligning system and a horizontal clamping and aligning system, each of which contain pairs of hydraulic cylinders, one of which is larger than the other, with the larger cylinder in each case being operable to a set position with respect to the rail line of the apparatus, to position the rail. The smaller cylinder then operates to effectively clamp the rail against an arm operated by the larger cylinder. The cylinders are connected in a parallelogram-type arrangement, with the entire arrangement being adjustable by means of still another hydraulic cylinder, for a final alignment adjustment. Lever arms which support the electrodes to vertically clamp the rail are very rigid in the vertical plane in clamping the rail, but are flexible to some degree in a horizontal plane. This flexibility permits the level arms to be laterally adjustable during the horizontal clamping and aligning process, so that the horizontal and vertical aligning systems are not effectively opposing one another. The apparatus for shearing off the upset metal surrounding the welded joint can be operated without removing most of the clamps which support the rail.