Use of an oscillograph in mechanical measurements

THE oscillograph is an instrument which has been extensively employed by electrical engineers in electrical measurements. It has been used not only in connection with electrical oscillations, such as alternating electromotive forces and alternating currents, but also in connection with acyclic electrical phenomena, such as the current required to blow a fuse, or the discharge current of a condenser. This paper describes methods by which the oscillograph may be used in mechanical measurements. This requires that the mechanical phenomena must affect an electric current which is being continuously recorded on the oscillograph.