|
Description: |
| Edgar Tate & Co. - patent attorneys
This invention relates to rulers or measuring-sticks, and the object thereof is to provide a scaled ruler having an adjustable sliding portion, the construction and arrangement being such that while the sliding part is not scaled it still enables us to measure any distance up to twice the length of the ruler proper, which advantages, together with others, we secure by means of the construction described in the following specification, in which Figure 1 represents our improved ruler with the slide partially extended.
|
|
