
1) Accelerator 2) Pedal
Found on
https://www.crosswordclues.com/clue/treadle

1) Broad pedal 2) Bus platform 3) Bus-exit device 4) Early Singer feature 5) Foot lever 6) Foot pedal 7) Footlever 8) Grindstone part 9) It may be worked by a tailor 10) It needs a foot 11) It requires footwork 12) Large pedal 13) Lever 14) Lever on a loom 15) Lever worked by the foot 16) Old player piano mechanism
Found on
https://www.crosswordclues.com/clue/treadle

A treadle [from OE tredan, to tread] is a part of a machine which is operated by the foot to produce reciprocating or rotary motion in a machine such as a weaving loom (reciprocating) or grinder (rotary). Treadles can also be used to power water pumps (as in the treadle pump), or to turn wood lathes (as in the pole lathe). In the past, treadles ha...
Found on
http://en.wikipedia.org/wiki/Treadle
[railway] In railway signalling, a treadle is a mechanical or electrical device that detects that a train axle has passed a particular location. They are used where a track circuit requires re-inforcing with additional information about a train`s location, such as around an automatic level crossing, or in an annunciator circuit, that sounds...
Found on
http://en.wikipedia.org/wiki/Treadle_(railway)

• (n.) The part of a foot lathe, or other machine, which is pressed or moved by the foot. • (n.) The chalaza of a bird`s egg; the tread.
Found on
http://thinkexist.com/dictionary/meaning/treadle/

(from the article `bicycle`) There is evidence that a small number of two-wheeled machines with rear treadle drives were built in southwestern Scotland during the early 1840s. ...
Found on
http://www.britannica.com/eb/a-z/t/75

a device close to or attached to a rail, activated by the passage of a wheel
Found on
http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=821-03-34

A treadle is a foot operated lever used to impart motion to a machine, such as a sewing-machine or lathe for example.
Found on
http://www.probertencyclopaedia.com/browse/GT.HTM

A mechanical or electrical device for detecting the presence of a rail vehicle with a pin-point accuracy, unlike a track circuit which can be detection over a length of up to several kilometres.
Found on
http://www.translationdirectory.com/glossaries/glossary256.php

[
v] - tread over 2. [v] - operate by a treadle, of machinery
Found on
http://www.webdictionary.co.uk/definition.php?query=treadle
No exact match found.