Petrus

Petrus may refer to:

See also

Petrus (Archbishop of Uppsala)

Petrus was the third archbishop of Uppsala, Sweden, between 1187-1197.

He was ordained by the mighty Danish archbishop Absalon in Lund, the primate of Sweden at that time. When Sweden got a new king, Sverker, who was related to the Danish Royal Court, Absalon extended his authority over Sweden. When Petrus in 1196 elected three bishops, Absalon requested the Pope to interact since the bishops were the sons of other priests, and this was not allowed according to Canon law. He also mentioned that several Swedish bishops refused to travel to Absalon's synods. Absalon was an authoritative person whom the Pope entrusted and gave him right, but by this time Petrus had already died.

References

See also

Petrus (given name)

Petrus is a Latin name derived from the Greek meaning "rock", and is the common English prefix "petro-" used to describe rock-based substances, like petros-oleum or "rock oil." As the source of Peter, it is a common name for people from antiquity through the medieval era.

People with the name

Switch

In electrical engineering, a switch is an electrical component that can break an electrical circuit, interrupting the current or diverting it from one conductor to another. The mechanism of a switch may be operated directly by a human operator to control a circuit (for example, a light switch or a keyboard button), may be operated by a moving object such as a door-operated switch, or may be operated by some sensing element for pressure, temperature or flow. A relay is a switch that is operated by electricity. Switches are made to handle a wide range of voltages and currents; very large switches may be used to isolate high-voltage circuits in electrical substations.

Description

The most familiar form of switch is a manually operated electromechanical device with one or more sets of electrical contacts, which are connected to external circuits. Each set of contacts can be in one of two states: either "closed" meaning the contacts are touching and electricity can flow between them, or "open", meaning the contacts are separated and the switch is nonconducting. The mechanism actuating the transition between these two states (open or closed) can be either a "toggle" (flip switch for continuous "on" or "off") or "momentary" (push-for "on" or push-for "off") type.

PDT

PDT may refer to:

Computers

Medicine

Other