US Patent: 2,302,506
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| Duplicating Attachment for Milling Machines
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Patentee:
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| James H. Richards (exact or similar names) - Glendale, Los Angeles County, CA |
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Patent Dates:
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| Applied: |
Mar. 11, 1941 |
| Granted: |
Nov. 17, 1942 |
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Joel Havens
Fray Milling Machine
"Vintage Machinery" entry for Fray Machine Tool Co.
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Description: |
| This invention relates to duplicating attachments for milling machines and the principal object is to provide a simple, economical and efficient attachment adapted for application to any conventional milling machine and embodying a tracer element arranged for traversing the surfaces of a work pattern which is to be duplicated and so mounted with respect to the milling tool and stem that when the tool cuts on a work blank to the depth of the surface of the pattern a signal will be afforded the operator, thereby requiring substantially less time of the operator in making frequent observations and measurements to ascertain the depth or extent to which the tool has previously cut.
My present improvements are particularly adaptable to milling attachments of my inventions as disclosed in my pending application for patent for All angle milling attachments, filed February 16, 1940, Serial Number 319,290,(patent #2,349,199) in which the cutting tool is universally adjustable relative to the work at any desired angle and in any desired plane, and though the invention is not limited for use to my particular apparatus, I will describe herein its application to such apparatus for illustrating the use and operation of the device.
An cb.ject, also, is to provide a duplicating attachment of but few parts and is preferably electrical in character and so mounted on the quill of a milling tool support, with adequate adjustments, that when a pattern and a work blank are similarly mounted upon a bed or work table of a milling machine the tracer and tool will contact the pattern and work blank, respectively, the tracer and tool being in substantial parallelism during a duplicating operation.
The invention comprehends, therefore, the provision of an electric signal, such as a low voltage electric lamp arranged for connection with a source of current and where necessary for connection with a transformer in the circuit for reducing the voltage from standard service voltage as when connected with electric supply systems, and a pair of contacts which are spaced apart and between which a contact which is movable with the tracer is disposed, normally engaged with one of said contacts but capable of being swung into contact with the other contact for first indicating to an operator when the required depth of a cut is attained and thereafter the fact that the cut has been made too deep. |
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