EXTRA INFO
PHOTO CAMBRIDGE MUSEUM OF TECHNOLOGY - STEAM ENGINE THE 'STEAM MAN' A DETAILED VIEW OF ONE OF THE TWO HATHORN DAVEY HORIZONTAL COMPOUND NON-ROTATIVE 'DIFFERENTIAL' PUMPING ENGINES BUILT IN 1894. THIS COMPLEX LOOKING PIECE OF MACHINERY IS KNOWN COLLOQUIALLY AS THE 'STEAM MAN' AND CONTROL THE ENGINE'S SLIDE VALVES. IT CONTROLS BOTH THE SPEED AT WHICH THE ENGINE STROKES AND THE PAUSE BETWEEN STROKES. THE CONTROL OF THE SPEED IS AS A RESULT OF THE DIFFERENTIAL BETWEEN A FIXED SPEED (PROVIDED BY THE STEAM MAN OPERATING AGAINST A WATER CATARACT) AND A VARIABLE SPEED (THE ENGINE'S PISTON SPEED THAT VARIES WITH THE LOAD OR CHANGES IN THE LOAD ON THE PUMPS). IT IS THIS DIFFERENTIAL THAT GIVES THIS TYPE OF ENGINE ITS NAME - THE DIFFERENTIAL ENGINE. COPYRIGHT (Photograph and text in Extra Info) CHRIS ALLENPHOTO PAPER THICKNESS NORMAL PHOTOGRAPH THICKNESS
NOTES
REF NO CALLENV-3138
PHOTO SIZE SIZE 6 X 4 inches
CONDITION: SOME CROPPING OR WHITE LINES TOP/BOTTOM MAY OCCUR DUE TO PHOTO RATIO
WATERMARK IF PRESENT ON THE IMAGE WILL NOT APPEAR ON ITEM SENT TO YOU: NOTES This is a print and supply service for an image that is COPYRIGHT (Photograph and text in Extra Info) Chris Allen obtained from GEOGRAPH and licensed for reuse under the Creative Commons Attribution-ShareAlike 2.0 Generic License Details of licence available here: https://creativecommons.org/licenses/by-sa/2.0/ MANY OTHER ITEMS ARE BEING ADDED TO MY SHOP DAILY