Patent CA-2214401-A1 (CA)
Inventor: CHEN RUEY-ZON
IPC: B23D51/02
Filed: 1997-09-03
Abstract: A coping saw having slantly and angularly adjusted working table is provided. The coping saw comprises a left and right U-shape brackets which are locked together. The lower portion of the right bracket is locked with a front housing in which a receiving space is defined therein for fixedly mounting an in-line motor. The output shaft of the in-line motor is connected with a blade and which can be oscillated upward and downward within a certain stroke to cut a workpiece disposed on the working table. Said working table is disposed between an opening between the left and right bracket and which is provided with a rectangular through hole in which a robust space is provided and the blade can be passed through without any interfering. Wherein even when the working table is angularly adjusted, the blade will not be interfered. The bottom of theworking table is provided with a front and rear mounting sockets and each of themounting sockets is provided with a shaft hole through its center. The left and bottom of the working table is also provided with a plurality of bulges and eachof which is provided with a deep threaded hole. The assembling of the working table is mounted to the left bracket and which is integrally provided with a tubular bulge in the opening. Said working table can be pivotally mounted by means of a pivoting element which passes through the shaft hole of the rear socket. Said front sectional housing is provided with a transitional surface and a tubular bulge is disposed at the top of the transitional surface. Another pivoting element is provided and which is pivotally mounted within the shaft hole of the front socket. The lower portion of the transitional surface is provided with a pair of bulges in which a pointer can be mounted thereof by means of a pluralityof screws which are locked into a plurality of corresponding threaded holes of the bulges such that the pointer is fixedly mounted. The lower portion of the bulgesbeing provided with a stopping tab in which a compressed spring and a steel ballare mounted. The upper portion of the bulges is further provided with an upper threaded hole for positioning. An angle displaying plate which has a circular shape is provided and which is provided with a circular slot. The lower portion of the circular slot is inscribed with a serial of numbers and each of which is represented a certain angle. The lower portion of the circular slot is further provided with a plurality of cutouts and each of which is represented with a standard angle, such as plus and minus 15 degrees, 30 degrees and 45 degrees. The left and upper portions of the angle displaying plate are provided with a transitional surface in which a plurality of through holes are provided. Whereina locking screw may pass through the though hole firstly and then locked into the deep threaded hole located at the left and bottom of the working table. An adjusting knob and a washer is provided and which are passed through the circular slot firstly and finally locked into the upper threaded hole of the bulge such that the shallow cutout which represents the 0 degree is biased by the steel ball. Then the adjusting knob is locked tightly such that the working table is fixed horizontally. Wherein when a workpiece is to cut slantly, the adjusting knob can be firstly loosened and then the working table can be rotated to a desired angle such that the steel ball is aligned and received into the shallow cutout. during the rotation, a clear click sound made between the steel ball andthe shallow cutout can be heard. As a result, the desired angle can be readily attained. By this provision, the adjusting of the angle can be readily attained and the angular adjustment can be performed on both left and right directions.