This is an unusual variant of the step transformer commonly supplied with the Nicholas illuminator from Bausch & Lomb. It is similar to the type 31 35 28 transformer in that it has a three-wire line cord, but it only has a two-conductor output socket. There is also a fourth output step position marked ‘over-voltage’. This transformer would not be suitable to halogen lamps because they are highly sensitive to over-voltage conditions. The highest output position is 8v at 3 amps.

The transformer is in excellent cosmetic condition and is fully tested, working at all output settings. The bottom plate nomenclature states that the transformer is intended for use with catalog item numbers 31-33-40 and 31-34-27.

Dimensions: 6 x 4.5 x 3.25 inch

***MPN 31-35-39
***OEM Bausch & Lomb (B&L)
***SKU*** 35081

This is a single focusing a10x ocular. This ocular will ONLY fit in the right-hand eyepiece tube of the Leitz series of binocular magnifiers. These magnifiers resembled inverted porro-prism binoculars and were supplied in three variations with fixed magnification objective lenses (0.7x, 1x, and 2x). They are unique in that the diameter of the ocular tube is 31mm (instead of the more common 30mm), and the length of the two ocular tubes differed. The left-hand tube would only accept the ‘fixed’ eyelens ocular, and the right tube the focusing ocular. Consequently, the shoulders on the two types of oculars were in different positions. Oculars were always supplied in pairs with one fixed and one adjustable eyelens.

These magnifiers were first produced in the 1920’s, and production continued in one form or another until around 1980. Around 1970 Leitz changed the tube diameter to the more conventional 30mm, so if you have a very recent magnifier, you should double-check to make sure this ocular will fit!

The lens is in very fine condition – just the typical wear in the enamel on the focusing knurl. The lens is in perfect condition although it does not appear to be coated. This lens would date from the early 1960’s or very late 1950’s judging from the font face on the ‘Germany’ engraving. It is more recent than the other a10x we have available.

Photo set 2064
***MPN
***OEM Leitz
***SKU*** 32256

This is an earlier Olympus eyepiece as supplied with their compound microscopes. It has a chrome-plated brass barrel with a black anodized front lens bezel. Nomenclature on the bezel reads:

CK 10x
Olympus Tokyo
‘Bi’

The glass is in near-perfect condition. The chrome-plated barrel does have some minor scuffing.

Photo set 2063
***MPN
***OEM Olympus
***SKU*** 32255

This appears to be a generic copy (albeit a very good one) of the American Optical type 1265 phase focusing telescope. It is identical in form and function, missing only the identifying catalog number and manufacturer’s markings. The focusing telescopes work very nicely (focusing is via a sleeve mount) and are capable of imaging objects anywhere from 120mm away to infinity.

These focusing telescopes are new and unused inventory, however they do not include the original packaging. Phase telescopes are typically used to align phase rings for phase contrast work, as well as checking the alignment of lamp filaments by observing the exit pupil of the objective.

Photo set 2035
***MPN
***OEM Custom
***SKU*** 32228

This quadruple nosepiece seems to have disappeared from the more recent Melles Griot catalogs. It is identical to the triple nosepieces but with four RMS threaded positions. The nosepiece is very well made, with two ball-bearing races akin to the Leitz nosepieces of similar vintage. The click-stop detent is internal and remains very positive. It is marked ‘Germany’.

The nosepiece is in excellent condition, however the lubricant is a bit stiff. It would benefit from a cleaning and relubrication but is functional the way it sits.

Photo set 2034
***MPN
***OEM Melles Griot
***SKU*** 32227

The Volpi fiber optic illumination systems are among the finest produced. The Intralux 6000 was a top-of-the-line illuminator. It featured a three-position lamp intensity switch alternating between two direct connections to the transformer secondaries (no resistors in series for reducing intensity). The middle position switches off the mains supply.

A very quiet cage fan is positioned immediately behind the lamp socket and provides very ample cooling even with the higher intensity selected. Additional regulation of the lamp output is possible using a helical wedge that reduced the amount of light to the end of the fiber bundle. A special dichroic heat filter is interposed between the lamp and the fiber bundle. In addition, there is a slot on the top of the unit for reception of special filter carriers. An empty holder is supplied with the illuminator.

The illuminator uses type DDL halogen lamps (150w 20v). Access to the lamp socket is via a wide door on the top of the housing. Lamps are easily exchanged without the use of any tools. The port for the fiber bundles is 15mm in diameter, and has a small keyway used to prevent rotation of the gooseneck type (semi-rigid) bundles.

The lamp socket is in very good condition and holds the lamp very firmly. It may be easily replaced when required using a terminal block accessed after removing the door. The instrument is fully functional. Cosmetically, the finish of the housing does have a few scratches near the handle, and the rubber molded grip on the aluminum handle has frayed a bit on one end (see photo).

Don’t see what you are looking for? Use our orange search box on the top right hand corner of this page to customize your search.
***MPN Intralux 6000
***OEM Volpi
***SKU*** 30147

This is a W.A. Technologies STM Control Unit.

STM scanning tunneling microscope is an instrument for imaging surfaces at the atomic level based on the concept of quantum tunneling.

This W.A. Technologies unit is a STM control component for this process.

Other STM components must be sourced outside BMI Surplus.

***MPN
***OEM W.A. Technologies
***SKU*** 15372

This is a Reichert 1190 High Intensity Lightsource
***MPN 1190
***OEM Reichert
***SKU*** 15232

Dolan-Jenner 180 Fiber-Lite High Intensity Illuminator.
Units may not have fibre adapters.
***MPN 180
***OEM Dolan-Jenner
***SKU*** 15227