Robert Boschgmbh

Leica Instruments Pte. Ltd.

Gernot Hansel

Karl Wanner

Manfred Bleicher

Karl Seitz

Wilbert Reibetanz

Herbert Wiesner

Horst Sigg

Werner Holbl

Wolfgang Schmid

Reinhard Hahner

In order that biological and histological sections may be produced without the risk of injury and at an expenditure acceptable for hobby and instructional purposes, a specimen arm whose distal end carries a specimen holder is supported on the base plate of the microtome. The specimen arm is attached to the base by a spindle which is mounted on the base plate such that it can be displaced in the direction of the cutting knife. An adjusting member is provided for adjusting the position of displacement of the spindle. Uniform section thicknesses are facilitated by a locking ball received in the adjusting member. A clamp is provided on the base plate for holding commercially available cutting blades at the required clearance angle of the cutting edge. Movement of the specimen arm can be brought about by means of a handle or a crank. When the specimen arm is tilted away, unintentional contact with the cutting edge is prevented by a movable blade guard.

Microtome

A dust-intercepting member is so mounted on a hand-held power tool as to contact a structure being acted upon around the tool element of the power tool, by a mounting arrangement which includes two hollow elongated mounting members one of which is received within the other for telescoping relative thereto while being retained against rotation with respect to the other mounting member about the common axis of the mounting members, and a helical compression spring the ends of which are respectively received in the interiors of the mounting members and urge the latter in opposite directions. The other mounting member is attached to an auxiliary hand grip which, in turn, is mounted on a cylindrical extension of the housing by a quick-release clamping arrangement. A setting ring on the inner one of the mounting members determines the depth of penetration of the tool element into the structure. A depth-determining profiled rod is displaceably and arrestably mounted on the auxiliary hand grip. The outer one of the mounting members is connected to the profiled rod when the intercepting arrangement is mounted on the auxiliary hand grip.

Particulate material intercepting arrangement for a hand-held tool

Particulate material intercepting arrangement for a hand held tool

A portable torque and impulse transmitting machine comprises an elongated housing having a median plane of symmetry which extends in direction of the elongation of the housing, and a tool holder which is mounted on the housing for holding a material-penetrating tool. A drive motor is mounted in the housing and has a rotary output shaft which is mounted in the housing so as to lie in and substantially bisect the median plane. An impeller assembly is also mounted in the housing and includes an impeller mounted for reciprocting movement therein and operative for transmitting impulses to the tool. A first power train is mounted in the housing and arranged to effect reciprocatory movement of the impeller in response to rotation of the rotary shaft of the drive motor. The first power train comprises a crank gear having an axis of rotation which is substantially parallel to the rotary shaft and which is also offset from the median plane. A second power train is mounted in the housing and arranged to transmit torque to the tool in the holder. The second power train includes an intermediate gear laterally adjacent the crank gear and in motion-transmitting engagement therewith. A safety overload clutch is mounted in series between the rotary shaft of the motor and the tool and is operative to terminate the transmission of torque from the rotary shaft to the tool when the latter encounters a resistance to rotation which exceeds a predetermined value.

Torque and impulse transmitting machine

Growing community of inventors

Stuttgart, Germany

Gernot Hansel