Landis & Gyr Betriebs Ag

Siemens Building Technologies, Inc.

Wolfgang Huber

Peter Ries

Paul Nauer

Randall J Amerson

The present invention relates to a system and method for securing wiring to a device housing. The device housing is provided with a base capable of securing different types of wiring. A reversible clamp strap is provided that may be used to further provide for the securing of different types of conductors into the device housing.

Apparatus for securing electrical wiring to a device

A device for measuring or controlling a property of a flow medium comprises a conduit which carries a flow medium. A choke element located in the conduit has a first open operating position and a second closed operating position. A driver drives the choke element from one operating position to the other. A pressure sensor measures the difference in pressure before and after the choke element in said conduit. A processor responsive to the pressure difference calculates a flow or thermal property of the flow medium. The processor comprises an input for receiving a continuous control signal which indicates a desired value of a flow or thermal property of the flow medium and a converter for converting the continuous control signal into a pulse-pause signal for controlling the driver.

Device to measure and/or control flow-through and/or quantity of heat

A heat circuit comprises an initial conduit containing a flow medium and a return conduit. A choke element located in a conduit such as the initial conduit of a heat circuit serves to control the flow of the flow medium. The choke element has several active positions in which openings having differently sized cross-sections are inserted into the path of flow. The choke element is moved by a drive so that a particular position of the choke is active. A differential pressure sensor measures the presure difference before and after the choke element. A computer resposive to the differential pressure sensor controls the drive so that a particular cross-section of the choke element takes effect and the flow of the medium is measured with sufficient precision over a wide measuring range. The inventive arrangement may also include a temperature sensor for measuring the temperature difference between the initial and return conduits. The computer which controls the choke drive may also be responsive to this temperature difference.

Growing community of inventors

Cham, Switzerland

Wolfgang Huber