Across 
4. Invented by Adolph Sax.
6. Wishful.
8. A crane or an oil driller. Named for a famous hangman.
9. Inventor of those bumps that let the blind read.
11. A race and a hat.
14. A dance garment. It was named after a guy too.
15. Find not guilty.
16. Side view.
22. Beg.
23. A type of engine named after the inventor.
24. A sweater. Named after an earl.
26. Dude. (Duh.)
27. Named after a landlord who charged such high rents that people refused to deal with him.
28. Hypnotized. Named after a guy who was supposedly good at it.
Down 
1. The big wheel at the fair.
2. A horse and a non-conformist.
3. This was the original name of Hawaii.
4. A giant tree named after an American Indian.
5. Got scared and stopped thinking.
7. A type of facial hair,
9. A flower named after Michel Begon.
10. The guy who invented those sweet crackers.
12. You might ride like this if you were in a hurry.
13. Named after an inventor, it is a measure of electricity.
17. Insulted.
18. You might hear these in a big room.
19. Named after a German baron.
20. More than one erupting mountain.
21. Helpful.
23. Determined.
25. Suspicious.