A milling apparatus for mounting and moving curtains that contain scale, water and/or other debris within a hood structure. The hood structure can form a housing that contains fixed metal curtains and/or movable metal curtains. The movable metal curtain can include a cartridge attached to the movable metal curtain. The cartridge can be attached to the movable metal curtain. The cartridge can be attached to and/or mounted on or with respect to a support, such as a support structure mounted and/or fixed with respect to the housing. A lock can be used to selectively secure the position of the cartridge with respect to the support.

A device for monitoring a machine movement of a movable constructional element includes a detecting device and a control device. The detection device comprises at least one transmission unit which transmits a signal, and a reception unit which receives the signal. The control device comprises an evaluation unit which evaluates the signal received at the reception unit. The control device allows the machine movement upon a receipt of the signal at the reception unit, and to output a first triggering pulse to stop the machine movement in an absence of the signal at the reception unit. The evaluation unit comprises a first threshold value measuring unit to detect a signal strength of the signal received at the reception unit and which, upon detection that a predetermined threshold value of a signal strength is fallen short of, outputs a second triggering pulse to stop the machine movement.

A device for monitoring a machine movement of a movable constructional element includes a detecting device and a control device. The detection device comprises at least one transmission unit which transmits a signal, and a reception unit which receives the signal. The control device comprises an evaluation unit which evaluates the signal received at the reception unit. The control device allows the machine movement upon a receipt of the signal at the reception unit, and to output a first triggering pulse to stop the machine movement in an absence of the signal at the reception unit. The evaluation unit comprises a first threshold value measuring unit to detect a signal strength of the signal received at the reception unit and which, upon detection that a predetermined threshold value of a signal strength is fallen short of, outputs a second triggering pulse to stop the machine movement.

A protective housing for a testing, measuring or production device has a protective element, which seals a housing opening and is held and guided by guide devices and can be moved into an open position by a drive device. The guide devices have arched sections which are outwardly curved forward and extend backwards in a straight line on an upper side of the protective housing. The protective element includes two flexurally stiff rectangular plates, which have straight longitudinal sides and a curve approximating the arched sections and are connected to each other on a longitudinal side via a hinge. The guide devices include a number of guide elements guided on a guide rail, wherein a respective guide element is arranged on the hinge and further guide elements are arranged on both sides of the hinge. The drive device drives the rearmost guide element via two traction transmissions, which have traction mechanisms running parallel to the straight section of the guide devices.

A protective housing for a testing, measuring or production device has a protective element, which seals a housing opening and is held and guided by guide devices and can be moved into an open position by a drive device. The guide devices have arched sections which are outwardly curved forward and extend backwards in a straight line on an upper side of the protective housing. The protective element includes two flexurally stiff rectangular plates, which have straight longitudinal sides and a curve approximating the arched sections and are connected to each other on a longitudinal side via a hinge. The guide devices include a number of guide elements guided on a guide rail, wherein a respective guide element is arranged on the hinge and further guide elements are arranged on both sides of the hinge. The drive device drives the rearmost guide element via two traction transmissions, which have traction mechanisms running parallel to the straight section of the guide devices.

An enclosure for a laser in which on side of the enclosure includes a rotatable positioner and a vertically slidable door movable between open and closed positions. With the door in the open position, the positioner is free to rotate, thereby enabling an workstation to rotate into and out of the enclosure.

A work-machine splash guard for enclosing a space for machining a workpiece, and preventing the spraying of chips and machining fluid, is equipped with: a front-surface door for opening and closing in the horizontal direction via an arc-shaped movement, and positioned on the front-surface side of the work machine; a side-surface door for opening and closing by performing an arc-shaped movement that is concentric with the front-surface door, and overlapping with the front-surface door; and door-locking switches for selectively allowing the opening/closing of the front-surface door and the side-surface door according to an opening/closing pattern.

A work-machine splash guard for enclosing a space for machining a workpiece, and preventing the spraying of chips and machining fluid, is equipped with: a front-surface door for opening and closing in the horizontal direction via an arc-shaped movement, and positioned on the front-surface side of the work machine; a side-surface door for opening and closing by performing an arc-shaped movement that is concentric with the front-surface door, and overlapping with the front-surface door; and door-locking switches for selectively allowing the opening/closing of the front-surface door and the side-surface door according to an opening/closing pattern.

A protective device for a machine, for example a container treatment machine, includes a protective element movable in the vertical direction and a pneumatic unit connected to the protective element. The pneumatic unit comprises a pressurizable pneumatic element, which is configured to substantially compensate for the weight force of the protective element during a movement along the vertical direction.