US Patent: 354,865
|
| Pocket Rule
|
|
Patentee:
|
|
| William H. Jones (exact or similar names) - Montreal, QC Canada |
|
|
Patent Dates:
|
| Applied: |
Feb. 24, 1886 |
| Granted: |
Dec. 21, 1886 |
|
Patent Pictures:
[
1 | 2
]
|
|
|
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward
Russ Allen.
|
|
Description: |
| Designed to be an inexpensive pocket rule that can be configured to be used as a square due to an additional hinge. Rule is drawing is shown as a 12", two fold rule with a additional hinge on one arm. Known examples are 24" two fold rule with a secondary hinge 4" from the center hinge. The center hinge has 180 degree angle markings in 5 degree increments and there are additional angle hash marks on one of the rule arms. The patent describes a locking mechanism or clip but that feature does not appear to be utilized on the production rule examples. |
|
){kind=link}
){kind=link}