US Patent: 68,061
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| Improvement in belt-shifting device
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Patentee:
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| Aaron M. Freeland (exact or similar names) - New York, NY |
| USPTO Classifications: |
| 474/6 |
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Patent Dates:
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| Granted: |
Aug. 27, 1867 |
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Patent Pictures:
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Joel Havens
"Vintage Machinery" entry for Freeland Tool Works
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Description: |
| Munn & Co.- patent attorneys
The inventor won a gold medal at the 1849 Fair of the American Institute for his "proved self acting boring, turning and screw cutting slide lathe" His address at the time was "78 Mangin-street". The description of this belt-shifter suggests that it is intended for metal planers.
This patent was also licensed to Hewes & Phillips Iron Works, Newark, NJ and Bement & Doughetry, Philadephia, PA.
In planing and other machines in which the work or tool requires to be driven in opposite directions it is usual to employ independent belts, the one being, crossed and the other straight, or so driven as that accordingly as either belt is shifted on to the fast or driving-pulley of the machine the latter will he operated in opposite directions. Various belt-shifters have been employed for this purpose, and so constructed as that a single motion will serve either to throw both belts on to their loose pulleys, when it is required to stop the machine, or either one belt on to the fast and the other on to its loose pulley; but such belt-shifters have ordinarily involved an extensive movement of the belts in effecting such changes, thus retarding the reversal of the motion and contributing to the wear of the belts. Segments of an internal and external wheel working about a common centre also have been employed, the same operating, by means of teeth, belt-shifters at separate intervals to act first upon the one belt and then upon the other, according to the change required to give the driver. My improvement, however, essentially differs from all such arrangements, and the nature of my invention consists of a novel combination of belt-shifting forks, arms, or levers, connected in a jointed manner by rods or bars with a rocking arm or sector on opposite sides of the centre of motion of the latter, or so that while either one fork, according to the direction in which the rocking or operating arm is swung, is having its maximum motion to shift its belt the other is having a minimum movement, so as not to remove its belt from .the pulley on which it is running, thus securing a smoothly operating belt-shifting motion, with a small amount of slide or play to the belts in effecting their changes from the fast to their loose pulleys.
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