B-646. ELONGATION GAUGE. Hounsfield Patent. Patented in 1933 by Leslie Hounsfield of London (UK Patent No. 394609 and used to measure the increase in length of metal under tension. There is a trough in which the piece being tested is inserted, but someone thought it was a type of inclinometer and inserted a Preston level which we're throwing in (vial is dry anyway). Clearly marked with the patent information and the manufacturer, Tensometer Ltd. of London. 6" long. Different. Fine 60 - 120 **All absentee bids must be submitted by end of day Friday, Nov. 1st. Current high bids can be obtained by calling our office at (800) 248-8114. See Auction Rules page for more information**