Internal Vibrator Provided With A Liberation Device
A system for routing telephone calls from a calling party instrument to a called party instrument and involving at least one internet protocol network includes: (a) a first internet protocol interface apparatus effecting a first communicative coupling between the calling party instrument and the at least one internet protocol network; (b) a second internet protocol interface apparatus effecting routing telephone calls according to routing criteria to establish a second communicative coupling between the at least one internet protocol network and the called party instrument; and (c) a call routing system apparatus coupled with the second internet protocol interface apparatus and storing information relating to a geographical or geospatial relationship of calling party instruments and called party instruments. The second internet protocol interface apparatus and the call routing system apparatus cooperate to establish the routing criteria.
1 . An internal vibrator device comprising:
an electric motor,
a vibrator housing,
an imbalance device situated in the vibrator housing and driven by the electric motor so as to be capable of rotation, and
a main switch for switching the electric motor on and off,
the electric motor being capable of being operated, in a normal operating state, with a rotational characteristic suitable for the compacting of liquid concrete,
wherein
an operating state change device by which the internal vibrator device is able to be operated in a liberation operating state in which the rotational characteristic of the electric motor differs from the rotational characteristic in the normal operating state, in such a way that via the operating state change device the direction of rotation of the electric motor is capable of being reversed automatically at periodic time intervals.
2 . An internal vibrator device according to claim 1 , wherein, via the operating state change device the direction of rotation of the electric motor is capable of being reversed in relation to the direction of rotation in the normal operating state.
3 . An internal vibrator device according to claim 1 , wherein the operation of the electric motor is capable of being interrupted at periodic time intervals via of the operating state change device.
4 . An internal vibrator device according to claim 6 , wherein the time duration of the periodic time intervals is able to be fixedly predetermined, or is variable.
5 . An internal vibrator device according to claim 1 , wherein the rotational speed of the electric motor is capable of being modified or is capable of being controlled by means of the operating state change device.
6 . An internal vibrator device according to claim 1 , wherein the vibrator housing, the electric motor, and the imbalance device are combined to form a vibrator device, the vibrator device being capable of being made to pass through its natural frequency through a modification of the rotational speed of the electric motor.
7 . Method for freeing a jammed internal vibrator device, in which an imbalance device in a vibrator housing is driven by an electric motor, and, in a normal operating state, the electric motor is operated with a rotational characteristic in order to compact liquid concrete, the method comprising:
alternatively to operation in the normal operating state, operating the electric motor in a liberation operating state in which the rotational characteristic of the electric motor differs from the rotational characteristic in the normal operating state if an operator activates the liberation operating state.
8 . A method according to claim 11 , wherein the rotational characteristic of the electric motor includes at least one of the following parameters: direction of rotation, rotational speed, temporal change of the rotational speed, and a temporal change of the direction of rotation.
9 . A method according to claim 7 , further comprising at least one of the following steps:
reversing the direction of rotation of the electric motor,
predetermining the direction of rotation of the electric motor,
automatically changing the direction of rotation of the electric motor,
reversing the direction of rotation of the electric motor at periodic time intervals,
interrupting the direction of rotation of the electric motor at periodic time intervals, and
modifying the rotational speed of the electric motor.
10 . Method according to one of claims 7 , wherein a vibrator device, comprising the electric motor, the vibrator housing, and the imbalance device, is made to pass through its resonant frequency through a modification of the rotational speed of the electric motor.