초록 ▼

An insulation system for an embedded track construction for a transit railway having spaced parallel railway rails includes a rail boot for substantially enclosing each of the rails along its length, rail clips extending on each side of each of the rails for securing the rails to supporting ties, an

An insulation system for an embedded track construction for a transit railway having spaced parallel railway rails includes a rail boot for substantially enclosing each of the rails along its length, rail clips extending on each side of each of the rails for securing the rails to supporting ties, and fillers extending on each side of each of the rails, frictionally engaging and removably mounting the rails to an associated one of said rail clips. The fillers cooperate to provide a coplanar roadway with said rails.

대표청구항 ▼

An insulation system for an embedded track construction for a transit railway having spaced parallel railway rails includes a rail boot for substantially enclosing each of the rails along its length, rail clips extending on each side of each of the rails for securing the rails to supporting ties, an

An insulation system for an embedded track construction for a transit railway having spaced parallel railway rails includes a rail boot for substantially enclosing each of the rails along its length, rail clips extending on each side of each of the rails for securing the rails to supporting ties, and fillers extending on each side of each of the rails, frictionally engaging and removably mounting the rails to an associated one of said rail clips. The fillers cooperate to provide a coplanar roadway with said rails. a slot to receive the balance bar.4. The key structure of claim 2, wherein the retainer further comprises a protrusion to hold the balance bar.5. The key structure of claim 1, wherein the first end portion of the scissors-shaped frame is slidably coupled to the cap, and the first end of the balance bar is rotatably coupled to the cap.6. The key structure of claim 1, wherein the first end portion of the scissors-shaped frame is rotatably coupled to the cap, and the first end of the balance bar is slidably coupled to the cap.7. A keyboard comprising a plurality of keys, at least some of said plurality of keys having a long key structure comprising: a base;a cap;a balance bar, disposed between the base and the cap, said balance bar having a first end coupled to the cap and a second end coupled to the base; anda scissors-shaped frame disposed between the base and the cap, said scissors-shaped frame having a first end portion, a second end portion, a third end portion, and a fourth end portion, the first end portion being coupled to the cap, the second end portion being coupled to the first end of the balance bar, the third and fourth end portions being coupled to the base;wherein the cap moves vertically relative to the base due to the action of the balance bar and the scissors-shaped frame.8. A key structure comprising: a base;a cap;a balance bar disposed between the base and the cap, said balance bar having a first end and a second end, said second end coupled to the base; anda scissors-shaped frame disposed between the base and the cap, said scissors-shaped frame having a first end portion, a second end portion, a third end portion, and a fourth end portion, the first and second end portions being coupled to the cap, the third and fourth end portions being coupled to the base, the cap moving vertically relative to the base due to action of the scissors-shaped frame; wherein the first end connects to the second end portion.9. The key structure of claim 8, wherein the second end portion further comprises a retainer for retaining the first end of the balance bar.10. The key structure of claim 9, wherein the retainer further comprises a slot to receive the balance bar.11. The key structure of claim 9, wherein the retainer further comprises a protrusion to hold the balance bar.12. The key structure of claim 8, wherein the first end portion is slidably coupled to the cap, and the second end portion is rotatably coupled to the cap.13. The key structure of claim 8, wherein the first end portion is rotatably coupled to the cap, and the second end portion is slidably coupled to the cap.14. A keyboard comprising a plurality of keys, at least one of said plurality of keys comprising: a base;a cap;a balance bar disposed between the base and the cap, said balance bar having a first end and a second end, said second end coupled to the base; anda scissors-shaped frame disposed between the base and the cap, said scissors-shaped frame having a first end portion, a second end portion, a third end portion, and a fourth end portion, the first and second end portions being coupled to the cap, the third and fourth end portions being coupled to the base, the cap moving vertically relative to the base due to action of the scissors-shaped frame;wherein the first end of said balance bar is coupled to the second end portion of said scissors-shaped frame. chever et al., 235/462; US-5679941, 19971000, Iizaka et al., 235/383; US-5747784, 19980500, Walter et al., 235/383; US-5796088, 19980800, Wall, 235/472; US-5806071, 19980900, Balderrama et al., 707/104; US-5821518, 19981000, Sussmeier et al., 235/462; US-5832463, 19981100, Funk, 235/379.X; US-5859414, 19990100, Grimes et al., 235/383; US-5895453, 19990400, Cook, 705/022; US-5920056, 19990700, Bonnet, 235/383; US-5923017, 19990700, Bjorner et al., 235/385; US-5953055, 19990900, Huang et al., 348/155; US-5969317, 19991000, Espy et al., 235/378; US-5984186, 19991100, Tafoya, 235/462.24; US-5992570, 19991100, Walter et al., 186/036; US-6023688, 20000200, Ramachandran et al., 705/044; US-6038553, 20000300, Hyde, Jr., 705/045; US-6236736, 20010500, Crabtree et al., 382/103; US-6296187, 20011000, Sheareer, 235/462.14; US-6343739, 20020200, Lippert, 235/379.X; US-6397194, 20020500, Houvener et al., 705/016