Device for an infinite adjustment of the specimen stroke in microtomes and ultramicrotomes专利检索-组织切片诊断设备和程序专利检索查询-专利查询网

Device for an infinite adjustment of the specimen stroke in microtomes and ultramicrotomes

阅读：694发布：2022-12-17

专利汇可以提供Device for an infinite adjustment of the specimen stroke in microtomes and ultramicrotomes专利检索，专利查询，专利分析的服务。并且A microtome having continuous adjustment to vary the length of the specimen cutting stroke is provided by a pair of eccentric members mounted on a drive shaft with one eccentric member selectively positionable about the periphery of the other eccentric member in order to provide a continuous range of eccentricity with a corresponding adjustment range in the specimen stroke. A cam may be also connected to the drive shaft and adjustable about the drive shaft to operate a switch for controlling the return stroke of the specimen arm. In motor driven microtomes, a means for varying the cutting and/or return stroke speed is desirable to accommodate long and short cutting strokes and provide consistent tissues.，下面是Device for an infinite adjustment of the specimen stroke in microtomes and ultramicrotomes专利的具体信息内容。

权利要求

1. A microtome having an adjustable stroke comprising a body, a knife mounted on said body, a specimen holder arm, said arm being pivotably mounted on said body at one end and adapted to hold a specimen adjacent said knife at the other end, a rotatable drive shaft mounted on said body, means carried on said drive shaft to oscillate said specimen holder arm, said means including first and second members, the first member being eccentrically attached to said drive shaft, the second member being eccentrically positioned about the periphery of said first member, manually operable means to rotate said second member about said first member to a selected eccentric position with respect to said first member, releasable lock means to couple said first and second members to provide a maximum eccentricity equal to the total eccentricity of said first and second members and a minimum eccentricity equal to the eccentricity of said first member less the eccentricity of said second member.

2. A microtome according to claim 1 wherein said manually operable means includes a sleeve enclosing a portion of the periphery of said drive shaft, means carried on one end of said sleeve to rotatably couple said sleeve to said second member and means attached to the other end of said sleeve to carry said lock means.

3. A microtome according to claim 2 wherein said first member is a cylinder secured to said drive shaft and has a cylindrical axis parallel to and spaced from said drive shaft and said second member is a hollow cylinder having a bore adapted to mate with the periphery of said first member; said bore having an axis parallel to and spaced from the cylindrical axis of said second member.

4. A microtome according to claim 3 wherein said lock means is a manually-rotatably, threaded member radially mounted in a flange on said sleeve and adapted to engage said drive shaft, an index means on said flange and a cylindrical seal attached to the end of said drive shaft adjacent one end of said flange and cooperating with said indexing means.

5. A microtome according to claim 4 wherein said sleeve has a second flange at the one end of said sleeve adjacent to said member, said second member has a radially extending recess in an end thereof and said second flange has an axially-aligned, eccentrically-positioned pin member adapted to cooperate with said recess to rotate said second member when said sleeve is manually rotated.

6. A microtome of claim 3 further including a collar mounted on the drive shaft and adapted to rotate therewith, said collar having a radially extending bore opening through the periphery, a member movably mounted on said body and adapted to normally rest in a position spaced from said collar, and manually operable means to move a portion of said member into said bore to temporarily prevent rotation of said drive shaft during adjustment of said second member.

7. A microtome according to claim 5 further including a collar mounted on the drive shaft and adapted to rotate therewith, said collar having a radially extending bore opening through the periphery, a member movably mounted on said body and adapted to normally rest in a position spaced from said collar, and manually operable means to move a portion of said member into said bore to temporarily prevent rotation of said drive shaft during adjustment of said second member.

8. A microtome according to claim 3 further including a motor means for rotating said drive shaft and means for controlling the return stroke of said specimen arm having adjustable switching means for signalling the shift of said specimen arm from cutting stroke to return stroke.

9. A microtome according to claim 7 further including a motor means for rotating said drive shaft and means for controlling the return stroke of said specimen arm having adjustable switching means for signalling the shift of said specimen arm from cutting stroke to return stroke.

10. A microtome according to claim 9 further including means for varying the speed at which said drive shaft is rotated during the cutting stroke.

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Device for an infinite adjustment of the specimen stroke in microtomes and ultramicrotomes

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