Re: Monochromator Repair Help Needed

[Brian Whatcott <betwys@DIRECTVINTERNET.COM>]

At 04:37 PM 9/10/02, you wrote:

> Greetings Physics Colleagues:
>
> We have a Bausch & Lomb Monochromator (Cat NO 33-86-76) that is in need of
> repair.  It looks like it once had a waxed string wrapped around two wheels
> that look they were designed for a toothed belt.  These wheels and
> connecting string? connected the external handle to the gearing that
> rotates the grating and reads out the wavelength.
>
> Have any of you had any experience repairing this type of device or do any
> of you have suggestions?  Maybe I just need to raid my wifes sewing
> supplies for some good strong string and put a few turns around both
> wheels/gears. Ideas?
>
> Ivan Rouse

I don't have an example to look at.
 But your observation suggests that a toothed belt would be ideal.
I have a catalog that shows belts of various tooth pitch distance.
If it happens that your pulleys use a pitch shown below,
I would recommend you call for a copy of the relevant catalog.
It is free.

Available pitches.
0.080 in.
0.0816
0.200
0.375 in.
                  3 mm
                  5
                  2.5
                10
                  2
                  3 mm

"World of Timing Belts"  cat D260
Stock Drive Products/Sterling Instrument   phone 516-328-3300
web:  <http:/www.sdp-si.com>




Brian Whatcott
  Altus OK                      Eureka!