1. A sonotrode for accelerating shot for ultrasonic shot peening, comprising:
at least one vibration exciter and a cover element that comprises an output side of the sonotrode, wherein the cover element is to be operated by means of the vibration exciter with a forced vibration such that the value of the vibration amplitude of the cover element corresponds essentially to the value of the vibration amplitude of the vibration exciter, where from this cover element another cover element is set out on the further side of the vibration exciter and in which between these two cover elements is stretched a majority of spring elements in the form of tension springs.
2. The sonotrode as recited in claim 1, characterized in that the cover element is connected immediately to the at least one vibration exciter.
3. The sonotrode as recited in claim 1, characterized in that the at least one vibration exciter is an ultrasonic piezoactuator.
4. The sonotrode as recited in claim 1, wherein the value of the vibration amplitude of the cover element or the value of the vibration amplitude of the vibration exciter is in the range from approximately 40 \u03bcm to 60 \u03bcm, and is preferably approximately 50 \u03bcm.
5. The sonotrode as recited in one claim 1, wherein the at least one vibration exciter has a length of approximately 40 mm to 60 mm, preferably approximately 50 mm.
6. The sonotrode as recited in claim 1, wherein a plurality of vibration exciters are provided whose vibration amplitude values are essentially identical and correspond to the value of the vibration amplitude of the cover element.
7. The sonotrode as recited in claim 6, characterized in that the plurality of vibration exciters are operated with phase-identical vibration.
8. The sonotrode as recited in claim 1, wherein the cover element is held on the at least one vibration exciter under pre-tension via at least one spring element.
9. The sonotrode as recited in claim 8, characterized in that the spring constant of the at least one spring element is designed such that its main resonance lies outside the operating frequency of the at least one vibration exciter.
10. The sonotrode as recited in claim 1, wherein the output side of the cover element is made of a high-strength material.
11. The sonotrode as recited in claim 1, wherein the output side of the cover element is provided with a structuring.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A chip-and-PIN reader device, comprising:
a slot for accommodating a chip-and-PIN card;
a set of electrodes adapted to come into contact with corresponding electrodes on the card when the card is inserted into the slot; and
a means for ensuring correct registration between the electrodes on the card and the set of electrodes of the reader device.
2. A reader device as claimed in claim 1, wherein the slot comprises two orthogonally disposed walls of the slot only, against which, in use, the card is pushed by the user of the reader device, said two orthogonally disposed walls constituting the means for ensuring correct registration.
3. A reader device as claimed in claim 1, wherein the means for ensuring correct registration comprises a pair of electrodes on each side of the set of electrodes which are to come into contact with the electrodes on the card, the reader device being adapted to detect a short-circuit of either of the two pairs of electrodes, due to a chip electrode contacting said pair of electrodes, and to signal said short-circuit to the user of the reader device.
4. A reader device as claimed in claim 3, wherein the reader device comprises:
a plurality of numeric keys for entering a PIN number;
an indicator device, which is adapted to provide feedback to the user of the reader device, indicating that the numeric keys have been pressed correctly, said indicator device being a light-emitting element having two different colours, a first of said colours indicating the successful entering of each digit of the PIN number and a second of said colours indicating a wrong entered PIN number;
wherein the reader device is configured to signal said short-circuit by the light-emitting element showing the second of the two different colours andor by a \u201cfail\u201d signal.
5. A reader device as claimed in claim 1, wherein the slot has a width less than that of the card.
6. A reader device as claimed in claim 1, wherein the reader device is also equipped to read a magnetic-strip type card.