received. The decimal register controller makes
its half revolution for the call and comes to rest, awaiting a
subsequent call, and the decimal indicator continues energized but only
momentarily, since it is released by the action of the cut-off relay
when the call is taken in charge by the divisional connective devices.

Calls may follow each other rapidly, the connective devices being
entirely independent of each other after having been assigned to the
respective calling lines. As has been described, the decimal indicator
starts the division starter and the decimal-register controller in quick
succession. The division starter, shown at the extreme bottom of the
left-hand row of Fig. 404, is a cylinder switch of the same general type
as used throughout this system. In it the terminals of a switch in each
division appear as fixed contact points in a circle over which move the
brushes of the division starter.

The decimal-register controller has the duties of transmitting to the
divisional apparatus a series of current impulses corresponding in
number to the numerical value of the tens digit of the calling line.
This is effected by providing before a movable brush ten contacts from
which the brush may receive current. These contacts are normally not
connected to battery, so that the brush in passing over them does not
receive current from them; however, when the brush has reached the
contact corresponding in number to the tens digit of the calling line, a
relay associated with the decimal-register controller charges the
contacts with the potential of the main battery, and each of the
remaining contacts passed over by the brush sends a current impulse to a
device designed to indicate on the division selected for the call the
tens digit of the calling line.

_The Connective Division._ The connective division, seven of which are
shown in Fig. 404, is an assemblage of switches comprising, as a whole,
a set suitable for a complete connection from calling to called
subscriber. Each connective division in the unit illustrated is
completely equipped to care for a called number of three digits, _i.
e._, each division will connect its calling line with any one of one
thousand lines which may be called. By a system of interconnecting
between divisions, each division may be equipped with interconnecting
apparatus so as to make it possible to complete a call with any one of
ten thousand lines. Each connecting division of a ten-thou