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US 4,038,666 AGranted
Portable medical data recorder
AssigneeAmerican Optical Corporation
InventorHenry Edward Fuller, Jr.
Life of this patent
Estimating the term…
Abstract
A portable medical data strip chart recorder in which a drive roller for drawing the strip across a platen includes integral motive means for rotating the roller at a selected angular velocity. A D.C. motor is mounted internally and concentrically with the roller shaft which upon energization drives the roller and hence the strip paper at a desired linear velocity. The incorporation of a D.C. motor internally of the drive shaft permits reduction in size and weight of the recorder as well as achieving a more efficient drive power transmission.
Claims5
A portable medical data strip chart recorder comprising:
- a supply roller on which the strip chart is stored;
- a platen across which the strip is drawn at a predetermined linear velocity and tension;
- and
- drive roller means for drawing the strip across the platen including integral motive means for rotating the roller means at a selected angular velocity, the drive roller means including a hollow shaft about which is affixed a concentric cylinder pad member of selected durometer, DC motor means mounted internally and concentrically of the shaft and affixed thereto having a DC motor axially aligned with a gearbox of selected ratio for providing the selected angular velocity and wherein the DC motor stator is affixed to the drive shaft and the rotor held stationary thereby causing the shaft and stator to rotate about the rotor at the selected angular velocity, the recorder includes a frame member to which the rotor is affixed and bearing members mounted to the frame in which marginal ends of the shaft are mounted, and a DC power source energizes the DC motor through brush means contacting means on one of the bearing members.
1 more element
Dependencies are inferred from the claim text.