Abstract: A method installs building control software. The method includes the transmission of an identity of a runtime environment from the runtime environment to a software delivery entity. A file is generated by the software delivery entity, wherein the file contains the transmitted identity and the software to be installed or a hash of the software to be installed. The generated file is signed by the software delivery entity by a key of the software delivery entity. The signed file is transmitted from the software delivery entity to the runtime environment. An installation and/or an authorization of the software to be installed in the runtime environment are performed, if and only if the identity of the runtime environment corresponds with the identity that has actually been transmitted in the signed file. Devices for installing the building control software are also discussed.

Abstract: A method installs building control software. The method includes the transmission of an identity of a runtime environment from the runtime environment to a software delivery entity. A file is generated by the software delivery entity, wherein the file contains the transmitted identity and the software to be installed or a hash of the software to be installed. The generated file is signed by the software delivery entity by a key of the software delivery entity. The signed file is transmitted from the software delivery entity to the runtime environment. An installation and/or an authorization of the software to be installed in the runtime environment are performed, if and only if the identity of the runtime environment corresponds with the identity that has actually been transmitted in the signed file. Devices for installing the building control software are also discussed.

Abstract: A fill level measuring device for measuring the fill level of liquid food in a container is provided which includes a sensor unit and a processing unit. The processing unit being is connected to the sensor unit and embodied such that the processing unit determines the fill level of the liquid food in the container depending on the measuring signals of the sensor unit, with the sensor unit comprising a container pressure sensor. The container pressure sensor is effectively connected with the liquid food in the container in order to measure the fluid pressure of the liquid food in the container and the processing unit is embodied such that it determines the fill level of the liquid food in the container depending on a difference of the fluid pressure measured in reference to the environmental pressure.

Abstract: The invention relates to a gear rack arrangement, which, for the compensation of backlash, comprises two gear racks (A, B) which are mutually displaceable on latch elements and are resiliently braced, and refers both to the assembly and disassembly characteristics of the gear rack arrangement and to the number of moulded elements used. Application is envisaged, in particular, for a positioning device in a recording and reproducing instrument for optical recording carriers, although the field of application is not however thereby restricted. According to the invention, an anti-detachment safeguard is provided, which is formed by an elastic boss (F). In order to prevent the detachment of a second gear rack (B) from a first gear rack (A) during the assembly or disassembly, the elastic boss (E) is provided at one end of one of the gear racks (A, B).

Abstract: The invention relates to a gear rack arrangement, which, for the compensation of backlash, comprises two gear racks (A, B) which are mutually displaceable on latch elements and are resiliently braced, and refers both t o the assembly and disassembly characteristics of the gear rack arrangement and to the number of moulded elements used. Application is envisaged, in particular, for a positioning device in a recording and reproducing instrument for optical recording carriers, although the field of application is not however thereby restricted. According to the invention, an anti-detachment safeguard is provided, which is formed by an elastic boss (E). In order to prevent the detachment of a second gear rack (B) from a first gear rack (A) during the assembly or disassembly, the elastic boss (E) is provided at one end of one of the gear racks (A, B).

Abstract: A resilient scanning or recording head support made of deformable material comprising a resilient molded part being step like shaped and resiliently deformable in at least one direction and/or through an angle. This construction accommodates deflection of the scanning head analogously to a parallel guide, in a straight line as well as through at least one angle deviating from the preferred directions of the parallel guide.

Abstract: A drum for a rotatable cylinder head includes an opaque disc-shaped member having a plurality of opaque fins affixed thereto and arranged substantially normal to the disc-shaped member. A first plurality of the fins has a first width and a second plurality of the fins has a second width broader than the first width. Every fin has a distal end remote from the disc-shaped member, and an opaque circumferential ring is affixed to the distal end of each fin. The disc-shaped member, the fins and the circumferential ring form a plurality of apertures about the drum.

Abstract: A brushless DC motor system includes a multi-pole DC motor having coils and permanent magnets. Optically scannable markers are applied on the circumference of a rotating member of the motor in fixed association with the magnets. By means of a scanner, these markers are converted to signals. These signals are evaluated with respect to their phase position and moment of commutation, and as a result commutation current is supplied to the coils.