VINTAGE PRECISION TOOL & INSTRUMENT CO. LTD ENGLAND MICROSCOPE TYPE 2152, US $99.00 – Picture 0

VINTAGE PRECISION TOOL & INSTRUMENT CO. LTD ENGLAND MICROSCOPE TYPE 2152, US $99.00 – Picture 1

VINTAGE PRECISION TOOL & INSTRUMENT CO. LTD ENGLAND MICROSCOPE TYPE 2152, US $99.00 – Picture 2

VINTAGE PRECISION TOOL & INSTRUMENT CO. LTD ENGLAND MICROSCOPE TYPE 2152, US $99.00 – Picture 3

VINTAGE PRECISION TOOL & INSTRUMENT CO. LTD ENGLAND MICROSCOPE TYPE 2152, US $99.00 – Picture 4

VINTAGE PRECISION TOOL & INSTRUMENT CO. LTD ENGLAND MICROSCOPE TYPE 2152, US $99.00 – Picture 5

VINTAGE PRECISION TOOL & INSTRUMENT CO. LTD ENGLAND MICROSCOPE TYPE 2152, US $99.00 – Picture 6

VINTAGE PRECISION TOOL & INSTRUMENT CO. LTD ENGLAND MICROSCOPE TYPE 2152, US $99.00 – Picture 7

VINTAGE PRECISION TOOL & INSTRUMENT CO. LTD ENGLAND MICROSCOPE TYPE 2152, US $99.00 – Picture 8

VINTAGE PRECISION TOOL & INSTRUMENT CO. LTD ENGLAND MICROSCOPE TYPE 2152, US $99.00 – Picture 9

VINTAGE PRECISION TOOL & INSTRUMENT CO. LTD ENGLAND MICROSCOPE TYPE 2152, US $99.00 – Picture 10

VINTAGE PRECISION TOOL & INSTRUMENT CO. LTD ENGLAND MICROSCOPE TYPE 2152, US $99.00 – Picture 11

Vintage Precision Tool & Instrument Co. Ltd England Microscope Type 2152

US $99.00

Suffield, Connecticut, United States
Jan 30th

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Travelling Vernier Microscope/ Microscope Type: 2152 The Precision Tool & Instrument Co. Ltd. Thornton Heath, Surrey, England Serial No. 7938-HB With PTI Ramsden x7 Eyepiece & Wooden Carry / Storage Case 2152 - Vernier Microscope These vernier microscopes are the standard instruments used in schools and colleges. In addition to operating to a greater accuracy, they incorporate features enabling them to be used for a greater range of experiments. The carriage slides on a cast-iron base and is guided by means of a vee and flat machined in the base. The carriage has a locking screw, release of which permits free manual movement of the carriage. Fine adjustment is by means of the fine thread screw at the end of the slide. The saddle carries the vernier, which is read by means of a swivelling magnifier. The microscope can be mounted with its axis in any one of the three directions with respect to the travel. The base carries a metal stage plate and this can be removed to enable the microscope to view through the base when using the instrument as a short range cathetometer. Technical Specification The instruments, which are supplied in polished cases, are identical except for travel and weight, and are supplied complete with 50 mm objective, 7x ramsden eyepiece, and glass crossline graticule, giving an overall magnification of approximately 20x. The microscope is focused by friction rack and pinion, and it is fitted with a draw tube. Vernier Microscope No. 2152 has a travel of 165 mm with vernier reading to 0.01 mm. Weight: 18 lbs, 10.5 oz. With Wooden Case, the weight is 23 lbs., 13.5 oz. "A travelling microscope is an instrument for measuring length with a resolution typically in the order of 0.01mm. The precision is such that better-quality instruments have measuring scales made from Invar to avoid misreadings due to thermal effects. The instrument comprises a microscope mounted on two rails fixed to, or part of a very rigid bed. The position of the microscope can be varied coarsely by sliding along the rails, or finely by turning a screw . The eyepiece is fitted with fine cross-hairs to fix a precise position, which is then read off the vernier scale . Some instruments, such as that produced in the 1960s by the Precision Tool and Instrument Company of Thornton Heath, Surrey, England, also measure vertically. The purpose of the microscope is to aim at reference marks with much higher accuracy than is possible using the naked eye. It is used in laboratories to measure the refractive index of liquids using the geometrical concepts of ray optics. It is also used to measure very short distances precisely, for example the diameter of a capillary tube. This mechanical instrument has now largely been superseded by electronic- and optically-based measuring devices that are both very much more accurate and considerably cheaper to produce." Maximum Dimensions Microscope:- Width: 12.5 inches; Height: 16 inches; Depth: 6.25 inches Dimensions Wooden Carrying Case:- Width: 14 inches; Height: 9 inches; Depth: 7 inches Pre-owned. Offered in good, used condition.

Condition	Used : An item that has been used previously. The item may have some signs of cosmetic wear, but is fully operational and functions as intended. This item may be a floor model or store return that has been used. See the seller’s listing for full details and description of any imperfections.
Seller Notes	“Fine Condition: No Damage.”