US Patent: 329,181
|
| Micrometer Gage
|
|
Patentee:
|
|
| Edward A. Marsh (exact or similar names) - Newton, MA |
| Manufacturer: |
| Not known to have been produced |
|
|
Patent Dates:
|
| Applied: |
Jul. 03, 1885 |
| Granted: |
Oct. 27, 1885 |
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward
Joel Havens
|
|
Description: |
| In the manufacture of watches, and in various other mechanical operations of like nature, it is necessary that there should be provided means for convenient and accurate measurements. Various devices have been designed to meet this want; but nearly all are very limited in their scope, and also unreliable in action, and lacking in accuracy and uniformity in different portions of their range. Some of them, moreover, by the nature of their construction and mode of use, are of necessity subject to such wear as renders them certain of constant deviation, and therefore unreliable for accuracy. To overcome all the above-mentioned serious difficulties, and to provide an Instrument or gage simple and cheap in construction, durable in its nature, comprehensive in its scope, and accurate in performance, as well as convenient in use, is the object of my invention, which consists in the several improvements hereinafter described and claimed. As a means for the accomplishment of this object, I employ an accurately cut screw, which is accepted as being the most reliable means known for obtaining accurate graduations. |
|
