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Of the making of many instruments as well as "of the making of many books there is no end." This would appear especially true in the obstetric art, for there seems as many forceps as there are individual obstetricians. However, the forceps herein described and delineated is believed to possess advantages heretofore not brought out in any other instrument. When it is considered that the primary object of the forceps is traction, Figure 1 will of itself indicate the merit claimed for this instrument.
It will be observed that the lock is at the center of two equal circles (the outer circle in the figure is not to be considered in the description), of which the handles are arcs, and which, at any angle made by the blades while grasping the fetal head, constantly coincide (overlap). The lower arc is marked off in centimeters and inches, which continually measures the
SPÄCH AB. A NEW OBSTETRIC FORCEPS.. JAMA. 1896;XXVII(26):1358-1359. doi:10.1001/jama.1896.02431040026013