Pendulum for determining a standard unit of length. Made by E. Johnson

Made:: Clerkenwell

Pendulum for determining a standard unit of length. Made by E. Johnson, Clerkenwell

Details

Category:: Weighing & Measuring

Object Number:: 1884-15

type:: pendulums

credit:: Patent Museum

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Parts

Pendulum made by E. Johnson

Pendulum made by E. Johnson, Clerkenwell. It is a long metal rod with brass elements on each end one end had two balls on it.

Object Number:: 1884-15/1

type:: pendulum

Image ©: The Board of Trustees of the Science Museum

Pendulum made by E. Johnson

Pendulum made by E. Johnson, Clerkenwell. It is a long metal rod with brass elements on each end. Both ends look like they have adjustment screws at each end.

Object Number:: 1884-15/2

type:: pendulum

Image ©: The Board of Trustees of the Science Museum

Component for pendulum made by E. Johnson

Component for pendulum made by E. Johnson, Clerkenwell. It is a wooden element with a brass plate screwed on, with two adjustment screws, possibly for adjusting pendulums.

Materials:: wood and brass

Object Number:: 1884-15/3

type:: component

Component for pendulum made by E. Johnson

Component for pendulum made by E. Johnson, Clerkenwell. A metal disc with a groove cut in the middle and a channel cut into the centre. It also has two other metal elements screwed onto it protruding from each side.