Moore and Wright Tachometer (Catalogue item 360) from 1960

Does anybody have a user guide for this 1960's Moore and Wright tacho. Moore and Wright say they dont have any records that far back which is a bit disappointing. Its more of a turns counter and I guess you use it with a clock to calculate the RPM. The central dial is movable on its own and is kept in the desired postion by the small black spring on the lower right . The outer dial rotates from input from the shaft on the left. Perhaps is a vernier type turns measure? I have not yet counted the ratio of input turns to dial.....

Any help in using this instument or a copy of the user guide would be very welcome. Thanks, Mike

I havealways wodered how these work. Presumably you need to k now the shaft diameter as well as it's really measuring surface speed?

Neil

Neil, I dont think its for surface speed, the rubber boss that slips on the left end is not big enough to get traction, it is used at the centre of a spindle, also indicated by the scuff marks on the end of the rubber boss.

Somebody must know how to use it, but if not I guess I will have to experiement..... Mike

I have one of these and it's lots older than 1960. Have the instructions as well, but at the moment its location eludes me. As soon as found will scan and send.

As far as can remember set all the dials to zero by loosening centre screw slightly. Hold it against centre of item, e.g. item in chuck as the chuck is spinning. As it starts to spin the dials will rotate and the count will increment. Stop after say 15 seconds, read the value of the dials, multiply by four to get rpm.

Colin

Colin

Colin you have saved the day! Many thanks. I would very much appreciate the scanned instructions when you find them. Have sent my email address to you. Thanks again, Mike

Hi Mike & Guys
Its for counting Revs. The pointed probe at the front is for inserting into a center at the end of shaft . Set it to zero and with a watch ready with a second hand with M/C running push probe into center it will start to rotate Remove after say about 15 sec see what it the reading is say 40 then x 4 thats 160 revs per min if my maths is corrrect If there no center in the shaft you then use the rubber end/probe
Nobby

Hi Mike I have a similar one but mine is made by STARRETT &co USA Pat apr 13:97 Mar 28:05

I think the "05"is 1905 as mine looks very old and no box .I think Nobby is right its for rev counting.

Mine has two lines of measurements outer one 0 to 100 clockwise and inner dial 100 to 0 anti clock .If Iturn the driving rod 1 turn the dial measures 1 count .backwards or for wards.

Not much help but its nice to know theres another one out there Best wishes Maurice

.

Hi Mike, bekow is a scan from a 1964 Buck and Hickman catalogue, showing it as a speed indicator.

Regards Nick.

Some tachos, similar to this had a little bell fitted so that you could count the number of turns the dial makes. Ian S C