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A protective device made of plastic, which is intended as an instrument housing for a measuring instrument. In order to ensure sufficient shock protection, which assures that the protective device is not damaged by hard shocks, the protective device is assembled from a core which is made of thermopl

A protective device made of plastic, which is intended as an instrument housing for a measuring instrument. In order to ensure sufficient shock protection, which assures that the protective device is not damaged by hard shocks, the protective device is assembled from a core which is made of thermoplastic material and at least in sections encloses the housing, and a sheathing, which is made particularly of rubber elastic material.

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1. In combination, a measuring instrument housing and a protective device for the measuring instrument housing surrounding the measuring instrument housing, the measuring instrument housing comprising a hollow housing body which is constructed and arranged for receiving therein a measuring device, a

1. In combination, a measuring instrument housing and a protective device for the measuring instrument housing surrounding the measuring instrument housing, the measuring instrument housing comprising a hollow housing body which is constructed and arranged for receiving therein a measuring device, and having an outer surface, a predetermined length and a longitudinal axis, andthe protective device form-fittingly held by the housing, and comprising:a core which is made of thermoplastic material externally surrounding the measuring instrument hollow housing body in sections which are spaced to expose the outer surface of the measuring instrument housing between the sections, the core being fixed to the measuring instrument housing and protecting the measuring instrument housing against shocks, anda sheathing surrounding the core and protecting the core against abrasion and penetration by sharp objects,wherein the sheathing is at least one material selected from the group consisting of a rubber elastic material, a natural rubber, a thermoplastic elastomer, an ethylene-propylene-diene rubber, and a foil or fabric laminated onto the core; andwherein the sheathing is held in place between the core and sections of the instrument housing. 2. The combination according to claim 1, wherein at least one of corners and edges of the housing, the core comprises supportable elements which are arranged at a distance from each other, and which are at least one of connected via the sheathing and surrounded by the sheathing, at least in sections. 3. The combination according to claim 1, wherein the core comprises sections which can be assembled. 4. The combination according to claim 1, wherein the sheathing is made up of a at least one component. 5. The combination according to claim 1, wherein the sheathing and the core are separately produced components. 6. The combination according to claim 1, wherein sections of the instrument housing engage in undercuts of the core, with longitudinal arms of the core radially attaching the core to the instrument housing. 7. The combination according to claim 1, wherein at least one of the core and the housing has a frame at a top and a bottom thereof with one arm each, which generate a plane, between which a handle is integrated. 8. The combination according to claim 7, wherein the handle is held in place between the frames. 9. The combination according to claim 7, wherein an offset laser optic attachment emanates from the top frame. 10. The combination according to claim 9, wherein the attachment is connected with the top frame through a snap-in or plug-in connection. 11. The combination according to claim 9, wherein the attachment comprises a first ring element, which emanates from the top frame, and a second ring element, which is connected to the first ring element through flat bars. 12. The combination according to claim 11, wherein at least one of the first ring element and the flat bars comprises plastic. 13. The combination according to claim 11, wherein the plastic is a fiber reinforced plastic. 14. The combination according to claim 11, wherein the first ring element is at least one of a receptacle for a laser and a part of a laser. 15. The combination according to claim 11, wherein the first ring element incorporates a control panel. 16. The combination according to claim 11, wherein the first ring element is secured against the instrument housing by means of the bars. 17. The combination according to claim 16, wherein the bars at a housing side have extension sleeves with internal threads, into which connection elements are inserted, which originate from a bottom plate of the instrument housing, screw into the bottom plate of the instrument housing, or both originate from and screw into the bottom plate. 18. The combination according to claim 17, wherein the connection elements penetrate longitudinal arms of the core. 19. The combination according to claim 11, wherein the bars are connected to the second ring element through plug-in connections or are built as an integral part of the second ring element. 20. The combination according to claim 11, wherein the second ring element comprises plastic. 21. The combination according to claim 11, wherein the second ring element is at least in sections enclosed by an additional ring element which is made of a thermoplastic material, which in itself is enclosed by a casing. 22. Protective device according to claim 1, wherein the core comprises expanded polypropylene. 23. The combination according to claim 1, wherein the housing body is generally circular or rectangular in cross-section. 24. The combination according to claim 1, wherein the sheathing is a skin formed by heat treatment of the core. 25. In combination, a measuring instrument housing and a protective device for the measuring instrument housing surrounding the measuring instrument housing, the measuring instrument housing comprising a hollow housing body which is constructed and arranged for receiving therein a measuring device, and having an outer surface, a predetermined length and a longitudinal axis, the hollow housing body comprising in sections along an outer surface thereof, outwardly facing open channels, each of said channels having a length substantially equal to the predetermined length of the housing body and a longitudinal axis corresponding to the longitudinal axis of the hollow housing body, andthe protective device form-fittingly held by the measuring instrument housing, and comprising:a core which is made of thermoplastic material externally surrounding the measuring instrument housing in sections which are spaced to expose the outer surface of the housing between the sections, the core protecting the measuring instrument housing against shocks, anda sheathing surrounding the core and protecting the core against abrasion and penetration by sharp objects,a section of the protective device being form-fittingly held in each of the channels, and extending outwardly therefromwherein the sheathing is at least one material selected from the group consisting of a rubber elastic material, a natural rubber, a thermoplastic elastomer, an ethylene-propylene-diene rubber, and a foil or fabric laminated onto the core. 26. The combination according to claim 25, additionally comprising sections of the protective device which extend laterally along the outer surface of the measuring instrument housing, and which connect adjacent sections of the protective device extending outwardly from adjacent channels. 27. In combination, a measuring instrument housing and a protective device for the measuring instrument housing surrounding the measuring instrument housing, the measuring instrument housing comprising a hollow housing body which is constructed and arranged for receiving therein a measuring device, and having an outer surface, a predetermined length and a longitudinal axis, andthe protective device form-fittingly held by the housing, and comprising:a core which is made of thermoplastic material externally surrounding the measuring instrument hollow housing body in sections which are spaced to expose the outer surface of the measuring instrument housing between the sections, the core being attached to the measuring instrument housing and protecting the measuring instrument housing against shocks, anda sheathing surrounding the core and protecting the core against abrasion and penetration by sharp objects,wherein the sheathing is at least one material selected from the group consisting of a rubber elastic material, a natural rubber, a thermoplastic elastomer, an ethylene-propylene-diene rubber, and a foil or fabric laminated onto the core,wherein the core comprises arms which originate from a frame with cylindrical sections, which in sections are form-fittingly received by hollow cylindrical sections, which each has one longitudinal slot, of the instrument housing. 28. The combination according to claim 27, wherein the frame has a rectangular geometry. 29. In combination, a measuring instrument housing and a protective device for the measuring instrument housing surrounding the measuring instrument housing, the measuring instrument housing comprising a hollow housing body which is constructed and arranged for receiving therein a measuring device, and having an outer surface, a predetermined length and a longitudinal axis, andthe protective device form-fittingly held by the housing, and comprising:a core which is made of thermoplastic material externally surrounding the measuring instrument hollow housing body in sections which are spaced to expose the outer surface of the measuring instrument housing between the sections, the core being attached to the measuring instrument housing and protecting the measuring instrument housing against shocks, anda sheathing surrounding the core and protecting the core against abrasion and penetration by sharp objects,wherein the sheathing is at least one material selected from the group consisting of a rubber elastic material, a natural rubber, a thermoplastic elastomer, an ethylene-propylene-diene rubber, and a foil or fabric laminated onto the core,wherein the core has a framework in the shape of a rectangular prism with longitudinal and cross arms; andwherein sections of the core are connected by connecting elements which extend through the longitudinal arms of the core.