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A catch for two objects moveable in relation to one another, in particular a door catch, includes a cylinder, which is operatively connected to a first object, a friction surface carrier, which is operatively connected to a second object, a friction element for creating a frictional grip between the

A catch for two objects moveable in relation to one another, in particular a door catch, includes a cylinder, which is operatively connected to a first object, a friction surface carrier, which is operatively connected to a second object, a friction element for creating a frictional grip between the cylinder and the friction surface carrier through an energy input. The friction element being connected to an electrical voltage supply device, wherein a change in the volume of the friction element, which constitutes an actuating movement of the friction element in relation to the friction surface, occurs as a function of the voltage applied to the friction element.

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1. A catch for first and second objects moveable in relation to one another, comprising:a cylinder for connection to the first object; a fiction surface carrier for connection to the second object, said friction surface carrier being moveably connected to said cylinder such that said friction surfac

1. A catch for first and second objects moveable in relation to one another, comprising:a cylinder for connection to the first object; a fiction surface carrier for connection to the second object, said friction surface carrier being moveably connected to said cylinder such that said friction surface carrier is movable relative to said cylinder; a friction element arranged between said cylinder and said friction surface carrier, said friction element being actuatable in response to an electrical voltage signal applied thereto for creating a frictional grip between said cylinder and said friction surface carrier to prevent relative movement between said cylinder and said friction surface carrier, said friction element changing in volume as a function of the electrical voltage signal applied thereto; and a sensor assembly for registering a relative movement of said cylinder and said friction surface carrier, wherein said sensor assembly comprises a mechanism having an input part and an output part, one of said input and output parts is connected to said friction surface carrier and the other of said input and output parts is connected to said cylinder. 2. The catch of claim 1, wherein said catch comprises a swivel hinge and said friction surface carrier comprises a hinge pin of said swivel hinge, said hinge pin comprising a flange forming a cover for said swivel hinge, and wherein said flange of said hinge pin is designed as said one of said input and output parts.3. The catch of claim 1, wherein said cylinder comprises a central axis and said cylinder has a bearing for receiving the other one of said input and output parts of said mechanism, said bearing being formed eccentrically in relation to said central axis.4. The catch of claim 1, wherein said mechanism comprises a gear mechanism.5. A catch comprising a swivel hinge for first and second objects moveable in relation to one another, comprising:a cylinder for connection to the first object; a friction surface carrier comprising a hinge pin of the swivel hinge for connection to the second object, said friction surface carrier being pivotally connected to said cylinder such that said friction surface carrier is pivotal relative to said cylinder; and a friction element arranged between said cylinder and said friction surface carrier, said friction element being actuatable in response to an electrical voltage signal applied thereto for creating a frictional grip between said cylinder and said friction surface carrier to prevent relative movement between said cylinder and said friction surface carrier, said friction element changing in volume as a function of the electrical voltage signal applied thereto. 6. The catch of claim 5, wherein said friction element comprises a carbon actuator.7. The catch of claim 6, wherein said carbon actuator is made of fullerenes.8. The catch of claim 6, wherein said carbon actuator comprises fused capillaries.9. The catch of claim 7, wherein said fullerenes are fused to form a non-woven fabric.10. The catch of claim 8, wherein said capillaries are fused to form a non-woven fabric.11. The catch of claim 9, wherein said carbon actuator is coated with a friction coating.12. The catch of claim 10, wherein said carbon actuator is coated with a friction coating.13. The catch of claim 5, further comprising an electrolyte at least partially enclosing said friction element.14. The catch of claim 13, wherein said electrolyte comprises a salt solution.15. The catch of claim 5, wherein said hinge pin comprises a flange forming a cover for said swivel hinge.16. The catch of claim 5, further comprising a sensor assembly for registering a relative movement of said cylinder and said friction surface carrier.17. The catch of claim 16, wherein said sensor assembly comprises a mechanism having an input part and an output part, one of said input and output parts is connected to said friction surface carrier and the other of said input and output parts is connected to said cylinder.18. The catch of claim 17, wherein said catch comprises a swivel hinge and said friction surface carrier comprises a hinge pin of said swivel hinge, said hinge pin comprising a flange forming a cover for said swivel hinge, and wherein said flange of said hinge pin is designed as said one of said input and output parts.19. The catch of claim 17, wherein said cylinder comprises a central axis and said cylinder has a bearing for receiving the other one of said input and output parts of said mechanism, said bearing being formed eccentrically in relation to said central axis.20. The catch of claim 17, wherein said mechanism comprises a gear mechanism.