Nikola Tesla Patents
422 mode how Sub a³ the usual way from a distant station by means of short and long signals, the apparatus may readily be made to record, or to enable an operator to read the message, since the receiver, supposing it to be an ordinary magnetic relay for example, will be operated by each signal from the sending station a certain number of times having some relation to the duration of each signal. It will be readily seen, however, that if the rays are varied in any other way, as by impressing upon them changes in intensity, the succeeding condenser discharges will undergo corresponding changes in intensity, which may be indicated or recorded by a suitable receiver and distinguished irrespectively of duration. Q With reference to Fig. 1 it may be useful to state that the electrical connections of the various devices illustrated may be made in many different ways. For instance, the sensitive device, instead of being in series as shown, may be in a shunt to the condenser, in which case less energy will be stored in the latter when the device is not acted upon by the rays, and the adjustment will be such that the receiver will (21 be operated only when the rays are diminished in intensity or interrupted and entirely prevented from falling upon the sensitive cell. Or, this device may be connected in a shunt to the resistance r, or inserted in any suitable way in the circuit including the receiver, or the several instruments may be connected in the manner of a Wheatstone bridge, or otherwise connected or related, but in each case the sensitive device will have the same duty to perform, that is, to control the energy stored and utilized in some suitable way for causing the operation of the receiver in correspondence with the intermittances or variations of the effects or disturbances, and in each instance, by a judicious selection of the devices and 12 This page retyped from microfilm for better readability - Ed.
