U.S. Philips Corporation

Hollandse Signaalapparaten B.v.

Antonius A Benschop

Gerardus N Van Veen

Andreas J Garenfeld

Petrus Henricus De Leeuw

Johannus C Roelofs

Johannes C Roelofs

A shaving apparatus is provided which has at least one cutting unit (3) comprising an external cutting member (4) and an internal cutting member (5) which is drivable relative thereto, which internal cutting member comprises at least one cutter rim (11), which external cutting member has at least one slot-shaped hair-entry aperture (15), a part of the cutter rim (11) constantly extending over an associated hair-entry aperture (15), and each point (A) of the cutter rim (11) performing a movement in accordance with a closed curve, the hair-entry aperture (15) being passed at least once when the closed curve is traversed one time. Preferably, both the cutter rim (11) and the slot-shaped hair-entry aperture (15) are circular and the movement of the cutter rim is an eccentric circular movement.

Shaving apparatus

The invention relates to a Stirling cooler, comprising a compressor for generating a time-varying pressure in a gaseous medium, a cooling element provided with at least a displacer and at least a regenerator and additionally comprising a connecting line between the compressor and the cooling element. The incorporation of heat flow-reduction means for reducing the heat flow from the compressor to the cooling element causes a sharp drop in temperature on the warm side of the cooling element as a result of which heat sinking will no longer be required.

Stirling cooler

A motor compressor unit comprises a hermetically sealed housing, a vibration motor with a rotationally vibrating drive shaft, and a symmetrical twin free-piston compressor comprising two oppositely disposed identical free pistons which can be reciprocated in respective cylinders by the drive shaft. In order to minimize piston drift from the center position, each cylinder is formed with a duct connecting the respective compression space to the space between the housing and the motor-compressor where the suction pressure prevails, which ducts are situated at equal distances from the respective cylinder end walls and can be closed by the respective pistons. As a result of this, the pressure in both cylinders is built up with the same swept volume and piston drift is minimized.

Motor-compressor unit

A motor-compressor unit is provided which comprises a vibration motor (1) having an armature (3) which can perform a rotationally vibrating movement about a drive shaft (4), and a compressor (10) having at least one piston (12) which can be reciprocated in a cylinder (11) by an arm (9) of the armature (3). The couping between the piston (12) and the arm (9) comprises a sleeve (15), which is slidable in a bore (16) in the piston and which is connected to the arm (9) by a ball joint (21). The oscillating movement of the arm (9) produces a helical reciprocating movement of the piston (12). This leads to an improved lubrication.

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Waalre, Netherlands

Antonius A Benschop