Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof
Patent
1975-02-18
1976-05-18
Whitehead, Harold D.
Abrasive tool making process, material, or composition
With carbohydrate or reaction product thereof
51170TL, B24B 354
Patent
active
039568563
ABSTRACT:
A reciprocating sharpener includes a plastic or metal housing mounted on a rigid base. Each of four, thin, flat, rectangular steel springs has one of its edges fixedly secured to the base. The opposite edge or free end of each of the steel springs is fixedly secured to one end of one of two elongated armatures or carriage members that are mounted in the sharpener in a parallel, coplanar condition. The armatures include upper, unobstructed surfaces with abrasive material of the type used for grinding or sharpening metal affixed thereto. Each armature further includes a laminated, iron, armature core fixedly mounted thereto. A laminated, iron, stator core and field coil are fixedly mounted on the base. The two armature cores are physically spaced on opposite sides of the stator core to cause the armature cores to move toward the stator core and each other upon the energization of the field coil by periodic pulses of electric current. Thus, the armatures or bridge members move in opposite directions upon the energization of the field coil and deflect their associated steel springs. When the field coil is deenergized, the steel springs reverse the directions of movement of the armatures and of the two armature cores causing the armature cores to move away from the stator core and from each other. The natural frequency of vibration of the armature-spring-base configurations is made approximately equal to the frequency of the periodic electric current supplied to the field coil, causing the armatures to reciprocate in opposite directions of 180.degree. out of phase. When a workpiece, such as an edge of a knife blade, is placed in contact with the abrasive material affixed to the open surfaces of the bridge members, the workpiece is maintained relatively stationary by the oppositely directed motions of the two bridge members and may be easily and rapidly sharpened or ground to the desired angle and degree of sharpness.
REFERENCES:
patent: 1524902 (1925-02-01), Anderson
patent: 2024860 (1935-12-01), Hobart
patent: 2106977 (1938-02-01), Hobart
patent: 2435565 (1948-02-01), Bautz
LandOfFree
Reciprocating sharpener does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Reciprocating sharpener, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reciprocating sharpener will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2226837