0239
  PRISM ADAPTER 
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  Surveying Instrument Collection 

Maker

Hewlett-Packard, Loveland, USA

Model

Prism Adapter HP 11425A

Serial Number

none

Dimensions

73 mm diameter, 51 mm high

Image

HP11425A Prism Adaptor

Description

The prism adapter ('swivel base') is shown on the left in the above figure.

The HP 11425A prism adapter ('prism interface base') allows to fit accessories (such as reflectors) with 5/8 inch centring threads to the heavy duty HP 11426A tribrach used for the HP 3820A electronic tacheometer.

The top of the prism adapter rotates about the vertical axis with friction coupling.

The collection holds three prism adapters labelled A, B, C.

 

History & comments

See brochure HP "Civil Engineering Products" (Part No. 5952-9153) for details.

Conservation

 

Condition

Lightly corroded aluminium parts.

Remarks

A: engraved P.C. 44732, marked Made in USA

B: engraved '2' (only)

C: engraved P.C. 44732, marked Made in USA

Dates

Catalogued in 2007 by JMR. Photo by JMR.

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