All The Claims

1. A bushing for at least one of electric current or voltage through a grounded plane, comprising:
a substantially rotationally symmetrical insulating body surrounding a central electrical conductor, said bushing comprising a sealing member for gasliquid sealing between the conductor and the insulating body, said insulating body comprising insulating material wound onto the conductor and impregnated with a hardening material, and being transferred into solid shape by a hardening process, wherein said sealing member comprises at least one sealing element comprising a compressible member arranged on a part of an axial direction of the conductor between the insulating body and the conductor, a compressed state being imparted to the sealing element during said hardening process by the insulating body, said sealing element forming a gasliquid seal, integrated with the insulating body, between the conductor and the insulating body.
2. The bushing according to claim 1, wherein the compressible member of the sealing element comprises grooves formed on an annular band, wherein the grooves are arranged perpendicular to the axial direction of the conductor facing the axial direction of the conductor.
3. The bushing according to claim 1, wherein the compressible member of the sealing element comprises gas filled cavities.
4. The bushing according to claim 1, wherein the compressible member of the sealing element comprises grooves and gas-filled cavities.
5. The bushing according to claim 1, wherein the sealing element has a cross section with an increasing thickness in a direction towards a center of the bushing for geometrically locking the sealing element.
6. The bushing according to claim 1, wherein the sealing element is arranged at an outer end of the insulating body and is arranged towards the outer end with a lip, which during a process for manufacturing the bushing serves as a flexible spacer that relieves force between the conductor and the outer end of the insulating body.
7. The bushing according to claim 1, wherein the sealing element comprises rubber.
8. The bushing according to claim 1, wherein the sealing element in a non-compressed state has a largest thickness of between 0.5 and 10 millimeters, a width of between 10 and 100 millimeters, and an inner diameter of between 20 and 300 millimeters, said diameter being somewhat smaller than an outer diameter of the conductor.
9. The bushing according to claim 1, wherein the bushing is designed for a lowest system voltage of 36 kilovolts and up to a highest system voltage of at least 800 kilovolts.
10. The bushing according to claim 1, wherein the insulating body further comprises a field control element.
11. The bushing according to claim 10, wherein the field control element comprises field-controlling linings.
12. The bushing according to claim 1, wherein the bushing is arranged in a transformer and is part of an electrical connection of the transformer to a force line, whereby the grounded plane comprises a wall of a transformer tank.
13. The bushing according to claim 1, further comprising:
gas-insulated equipment, whereby the grounded plane comprises an enclosure around an insulating gas.
14. The bushing according to claim 1, wherein the bushing comprises part of a cable termination, whereby the grounded plane comprises a ground casing in a cable segment.
15. The bushing according to claim 1, wherein the insulating material comprises insulating paper.
16. The bushing according to claim 1, wherein the hardening material comprises-epoxy.
17. The bushing according to claim 1, wherein the bushing is designed for a lowest system voltage of 170 kilovolts and up to a highest system voltage of at least 800 kilovolts.
18. A method for manufacturing a bushing for at least one of electric current or voltage through a grounded plane comprising a substantially rotationally symmetrical insulating body surrounding a central electrical conductor, said bushing comprising a sealing member for gasliquid sealing between the conductor and the insulating body, the method comprising:
forming said insulating body by winding insulating material onto the conductor,
impregnating said insulating body with a hardening material,
transferring the insulting body into solid shape by a hardening process, said sealing member comprising at least one sealing element comprising a compressible member applied to a part of axial direction of the conductor between the insulating body and the conductor prior to the winding of the insulating material, said material being applied so as to cover the sealing element, and
imparting a permanent and substantially radial compressive force to the sealing element with the compressible member during the subsequent manufacturing process by the insulating body, whereby the sealing element in a compressed state serves as the gasliquid seal between the conductor and the insulator body.
19. The method according to claim 18, wherein the sealing element comprises rubber and is compressed by deformation of the compressible member comprising grooves making contact with the conductor.
20. The method according to claim 18, wherein the sealing element comprises rubber and is compressed by deformation of the compressible member comprising cavities which are compressed.
21. The method according to claim 18, wherein the sealing element is compressed by deformation of grooves and gas-filled cavities.
22. The method according to claim 18, wherein after the hardening process, a final shape is imparted to the bushing by a machining.
23. The method according to claim 22, wherein the machining comprises turning in a lathe.
24. The method according to claim 18, wherein an end of the sealing element facing an outer end of the insulating body is formed with a lip, wherein said lip, during the machining of the insulating body, is exposed, alternatively removed.
25. The method according to claim 18, further comprising:
winding a field control element into the insulator body between the insulating material.
26. The method according to claim 25, wherein the field control element comprises field-controlling linings.
27. The method according to claim 18, wherein a pressure-equalizing layer is applied between part of the conductor and the insulator body.
28. The method according to claim 18, wherein the method is adapted to manufacturing of a bushing for a lowest system voltage of 36 kilovolts and up to a highest system voltage of at least 800 kilovolts.
29. The method according to claim 18, wherein the insulating material comprises insulating paper.
30. The method according to claim 18, wherein the hardening material comprises-epoxy.
31. The method for manufacturing a bushing according to claim 18, wherein the hardening process comprises hardening shrinkage.
32. The method according to claim 18, wherein the method is adapted to manufacturing of a bushing for a lowest system voltage of 170 kilovolts and up to a highest voltage of at least 800 kV kilovolts.

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 waveform generating device comprising:
waveform data storage means for storing waveform data of a chain of a plurality of separated sound components;
performance data input means for inputting performance data;
performance data storage means for storing first performance data that has been input by the performance data input means;
performance data detection means for detecting a sound production length of second performance data that has been input by the performance data input means;
performance data updating means for updating the first performance data based on the sound production length;
time compression and expansion percentage acquisition means for acquiring a time compression and an expansion percentage of each of the separated sound components of waveform data based on the first performance data that have been updated; and
waveform generation means for generating a waveform in conformance with the time compression and the expansion percentage and in accordance with second performance data that is input by the performance data input means.
2. The waveform generating device cited in claim 1, wherein the performance data detection means includes tempo detection means for detecting a tempo of the second performance data based on the sound production length; and
wherein the performance data updating means updates the first performance data based on the tempo of the second performance data.
3. The waveform generating device of claim 1, wherein the performance data updating means updates a tempo of the first performance data based on the sound production length.
4. The waveform generating device of claim 2, wherein the performance data updating means updates a tempo of the first performance data based on the sound production length.
5. The waveform generating device of claim 1, wherein the performance data updating means updates the first performance data based on the sound production length when there has been a specified alteration to the second performance data.
6. The waveform generating device of claim 2, wherein the performance data updating means updates the first performance data based on the sound production length when there has been a specified alteration to the second performance data.
7. The waveform generating device of claim 3, wherein the performance data updating means updates the first performance data based on the sound production length when there has been a specified alteration to the first performance data.
8. The waveform generating device of claim 4, wherein the performance data updating means updates the first performance data based on the sound production length when there has been a specified alteration to the first performance data.
9. A waveform generating device comprising:
waveform data storage memory configured to store waveform data of a chain of a plurality of separated sound components;
performance data input electronics configured to receive input performance data;
performance data storage memory configured to store first input performance data received by the performance data input electronics;
performance data processing electronics configured to detect a sound production length of second performance data received by the performance data input electronics and to update the first performance data based on the sound production length;
time compression and expansion percentage acquisition processing electronics configured to acquire a time compression and an expansion percentage of each of the separated sound components of waveform data based on the first performance data that has been updated; and
a waveform generator configured to generate a waveform in conformance with the time compression and the expansion percentage and in accordance with second performance data that is received by the performance data input electronics.
10. The waveform generating device cited in claim 9, wherein the performance data processing electronics includes tempo detection electronics configured to detect a tempo of the second performance data based on the sound production length; and
wherein the performance data processing electronics is configured to update the first performance data based on the tempo of the second performance data.
11. The waveform generating device of claim 9, wherein the performance data processing electronics is configured to update a tempo of the first performance data based on the sound production length.
12. The waveform generating device of claim 10, wherein the performance data processing electronics is configured to update a tempo of the first performance data based on the sound production length.
13. The waveform generating device of claim 9, wherein the performance data processing electronics is configured to update the first performance data based on the sound production length when there has been a specified alteration to the second performance data.
14. The waveform generating device of claim 10, wherein the performance data processing electronics is configured to update the first performance data based on the sound production length when there has been a specified alteration to the second performance data.
15. The waveform generating device of claim 11, wherein the performance data processing electronics is configured to update the first performance data based on the sound production length when there has been a specified alteration to the first performance data.
16. The waveform generating device of claim 12, wherein the performance data processing electronics is configured to update the first performance data based on the sound production length when there has been a specified alteration to the first performance data.

1. A metal can body comprising:
a cylindrical, metal sidewall having a circular cross-section which defines a volume;
a circular, metal end panel that closes one end of the cylindrical sidewall, the end panel including:
a circular center panel having a perimeter defined by a bead and a first plane contacting a surface of the panel;
an annular, elastic portion extending from the sidewall to a boundary and having a second plane substantially perpendicular to the sidewall and contacting the elastic portion, the elastic portion including a plurality of ridges substantially concentric with the sidewall;
a frustoconical transition portion extending from the boundary to the bead connecting the center panel and the elastic portion such that the first plane is offset from the second plane to support the center panel at a first position in the interior;
the center panel being moveable from the first position to a second position by a force exerted from the interior upon the end panel, the second position being outside of the volume, and the center panel returnable to the first position when the force is reduced.
2. The can body of claim 1, wherein the metal is one of steel and aluminum.
3. The can body of claim 2, wherein the concentric ridges are uniformly spaced.
4. The can body of claim 2, wherein there are at least five ridges in the elastic portion.
5. The can body of claim 4, wherein the sidewall has a first radius from the center of the center panel, the perimeter has a second radius which is between 50% and 60% of the first radius, and the boundary has a third radius between 20% and 30% of the first radius.
6. The can body of claim 5, wherein the transition portion extends from the center panel at an angle of between 17\xb0 and 21\xb0 when the center panel is in the first position.
7. The can body of claim 4, wherein the metal sidewall and the end panel are joined together at the sidewall with a double seam.
8. The can body of claim 4, wherein the metal sidewall and the end panel are integrally formed.
9. A method of filing a can comprising:
providing a can body having a sidewall extending along a longitudinal axis from a first open end to a second end and an end panel sealing the second end, the end panel having a center panel portion in a first configuration extending along a first plane, a transition portion extending radially outwardly from the center panel portion, and a radially outer elastic portion extending between the transition portion and the sidewall along a second plane, the second plane being non-coplanar with the first plane;
filling the can body;
coupling a can end to the sidewall to hermetically seal the can body;
heating the contents of the sealed can body, wherein the increased pressure inside the can body resulting from the heating causes the center panel portion to transition from the first configuration to a second configuration in which the center panel portion extends along a third plane on an opposite side of the second plane than the first plane;
wherein the second plane and the third plane are non-coplanar;
cooling the contents of the sealed can body; and
applying a force to the center panel portion toward the first plane causing the center panel portion to transition from the second configuration to the first configuration.
10. The method of claim 9, wherein the heating step includes heating the contents of the container by induction.
11. A can body comprising:
a sidewall extending along a longitudinal axis from a first open end to a second end; and
an end panel closing the second end of the sidewall, the end panel including an outer annular portion including a plurality of ridges, a frustoconical portion extending radially inwardly from the outer annular portion at a first angle, and a center portion extending from the frustoconical portion;
wherein the center portion is configured to be displaced between a first configuration in which the center portion is located above the lower axial periphery of the sidewall and a second configuration in which the center portion is located below the lower axial periphery of the sidewall.
12. The can body of claim 11, wherein the end panel has a first diameter and wherein the center portion has a second diameter;
wherein the second diameter is between 20% and 30% of the first diameter.
13. The can body of claim 11, wherein the outer annular portion includes a plurality of ridges generally concentric with the sidewall; and
wherein the center portion has a perimeter defined by a bead generally concentric with the sidewall.
14. The can body of claim 11, wherein the outer annular portion extends along a first plane;
wherein the frustoconical portion extends at a first angle to the first plane when the center portion is in the first configuration; and
wherein the first angle is between 17\xb0 and 21\xb0.
15. The can body of claim 11, wherein the can body has a first height;
wherein the center portion in the first configuration extends along a second plane;
wherein the second plane is a second height above the first plane; and
wherein the second height is between 2% and 3% of the first height.
16. The can body of claim 11, wherein the outer annular portion is configured to allow the center portion to transition between the first configuration and the second configuration and to resume its shape prior to the transition after the transition.
17. The can body of claim 11, wherein the center portion is configured to transition from the first configuration to the second configuration when the pressure inside the can body is between 35 psig and 40 psig.
18. The can body of claim 11, wherein the outer annular portion includes six ridges.
19. The can body of claim 11, wherein the end panel is coupled to the sidewall by a double seam.
20. The can body of claim 11, wherein the end panel is configured to allow the center portion to transition between the first configuration and the second configuration without permanently deforming the end panel; and
wherein the end panel is configured so that the center portion is maintained in the second configuration when the interior pressure of the can body decreases.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.

What is claimed is:

1. A hydraulic drive unit comprising:
a pair of main circuits (1), (2) each connecting an oil pressure source with a hydraulic motor (M);
a counter-balancing valve (3) disposed halfway of the main circuits (1), (2) so as to be capable of being changed over from one position to another, said counter-balancing valve (3) being provided with:
a pair of discharge passages (10), (11) and a pair of return passages (12a), (12b), both of which are adapted to be opened and closed for the main circuits (1), (2);
a pair of first check valves (13), (14) disposed halfway of the discharge passages (10), (11);
a pair of orifices (28), (29) disposed halfway of the return passages (12a), (12b); and
a pair of branch passages (21), (22) which are connected to the discharge passages (10), (11) on upstream sides of the first check valves (13), (14) and selectively connected to the by-pass circuit(27);

return circuits (23), (24) each connected to the main circuits (1), (2) in a position therebetween;
a pair of second check valves (25), (26) disposed halfway of the return circuits (23), (24); and
a by-pass circuit (27) connected to the return circuits (23), (24) in a position between the second check valves (25), (26).
2. A hydraulic drive unit comprising:
a pair of main circuits (1), (2) each connecting an oil pressure source with a hydraulic motor (M) and having first main circuits (1a), (2a) and second main circuits (1b), (2b) which are in parallel with each other;
first check valves (13), (14) disposed halfway of the first main circuits (1a), (2a);
a counter-balancing valve (3) disposed halfway of the second main circuits (1b), (2b) so as to be capable of being changed over from one position to another, said counter-balancing valve (3) being provided with:
a pair of branch passages (21), (22) selectively opening and closing the second main circuits (1b), (2b) for the first by-pass circuit (27);
a pair of return passages (12a), (12b) opened and closed for the second main circuits (1b), (2b); and
a pair of orifices (28), (29) disposed halfway of the return passages (12a), (12b);

return circuits (23), (24) each connected to the main circuits (1), (2) in a position therebetween;
a pair of second check valves (25), (26) disposed halfway of the return circuits (23), (24); and
a first by-pass circuit (27) connected to the return circuits (23), (24) in a position between the second check valves (25), (26).
3. A hydraulic drive unit comprising:
a pair of main circuits (1), (2) each connecting an oil pressure source with a hydraulic motor (M) and having first main circuits (1a), (2a) and second main circuits (1b), (2b) which are in parallel with each other;
first check valves (13), (14) disposed halfway of the first main circuits (1a), (2a);
a counter-balancing valve (3) disposed halfway of the second main circuits (1b), (2b) so as to be capable of being changed over from one position to another, said counter-balancing valve (3) being provided with:
a pair of return passages (12a), (12b) opened and closed for the second main circuits (1b), (2b); and
a pair of orifices (28), (29) disposed halfway of the return passages (12a), (12b);

return circuits (23), (24) each connected to the main circuits (1), (2) in a position therebetween;
a pair of second check valves (25), (26) disposed halfway of the return circuits (23), (24);
a first by-pass circuit (27) connected to the return circuits (23), (24) in a position between the second check valves (25), (26);
second by-pass circuits (40), (41) connected to the main circuits (1), (2) in a position therebetween in parallel with the return circuits (23), (24); and
a change-over valve (42) disposed halfway of the second by-pass circuits (40), (41) and at the same time of changing-over thereof, selectively opening and closing the first by-pass circuit (27) to one of the second by-pass circuits (40), (41).
4. A hydraulic drive unit comprising:
a pair of main circuits (1), (2) each connecting an oil pressure source with a hydraulic motor (M);
a counter-balancing valve (3) disposed halfway of the main circuits (1), (2) so as to be capable of being changed over from one position to another, said counter-balancing valve (3) being provided with:
a pair of discharge passages (10), (11) and a pair of return passages (12a), (12b), both of which are adapted to be opened and closed for the main circuits (1), (2);
a pair of first check valves (13), (14) disposed halfway of the discharge passages (10), (11);
a pair of orifices (28), (29) disposed halfway of the return passages (12a), (12b); and
a pair of branch passages (21), (22) which are connected to the discharge passages (10), (11) on upstream sides of the first check valves (13), (14) and are selectively connected to the by-pass circuit (27);

return circuits (23), (24) each connected to the main circuits (1), (2) in a position therebetween;
a high pressure selection valve (4) disposed halfway of the return circuits (23), (24) so as to be capable of being changed over from one position to another; and
a by-pass circuit (27) connected to the return circuits (23), (24) on a downstream side of the high pressure valve (4) so as to be capable of being changed over from one position to another.
5. A hydraulic drive unit according to claim 4, wherein auxiliary passages (131), (132) which communicate with a brake cylinder-side circuit (133) so as to be capable of being opened and closed are connected to the branch passages (21), (22) of the counter-balancing valve (3).
6. A hydraulic drive unit according to any one of claims 1 to 5, wherein the counter-balancing valve (3) consists of a spool type valve body inserted slidably into a valve hole (140) of a valve body (30), said valve hole (140) being provided with a land groove (60) having a suitable width which opens and closes the by-pass circuit (27) and the branch circuits (21), (22) in accordance with a stroke of the counter-balancing valve (3).