Photoelectric pulsemeter

• US 3,983,866 A
• Filed: 02/17/1972
• Issued: 10/05/1976
• Est. Priority Date: 11/16/1971
• Status: Expired due to Term

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Ulrich, Alfred, Naser, Georg
• Primary Examiner(s): Michell, Robert W.
• Assistant Examiner(s): Cohen, Lee S.
• Application Number:
  US05/227,175
• Time in Patent Office: 1,692 Days
• Field of Search: 128/2.05 P, 128/2.05 T, 128/2.06 F, 128/2.1 Z, 128/2.05 R, 128/2 L, 128/2 B, 128/2.05 E, 356/39, 356/40, 356/41, 356/42, 250/239, 250/227
• US Class Current: 600/479
• CPC Class Codes: A61B 5/02427 Details of sensor

Abstract

A photoelectric pulsemeter has an applicator connected to an electrical line and containing a light transmitting source fed from an electrical lamp and a photo-electrical receiver screened upon the application side from the light transmitting source. The invention is particularly characterized in that the applicator is divided and has a carrier containing the application side and the source of transmitting light and a supporting plate removable from the carrier and having the lamp, the receiver and possibly other electrical structural parts and conduits. The lamp and the receiver are so constructed and arranged that when the applicator is mounted they functionally properly adapt themselves to the carrier.

Claims

1. A photoelectric pulsemeter, comprising an applicator having a support member and a supporting plate removably connected with said support member, said support member having an application surface, light transmitting means carried by said support member, a photo-electrical receiver carried by said supporting plate, a lamp carried by said supporting plate and feeding said light transmitting means, said lamp and said receiver fitting functionally to said support member when the applicator is mounted, a supply line having leads attached to the applicator and connected with said lamp and said receiver, and current supplying means connected with said supply line.

2. A pulsemeter according to claim 1, wherein said supporting plate comprises a cover on its outer side.

3. A photoelectric pulsemeter according to claim 1, wherein said support member has an outer surface located opposite said application surface, said supporting plate being mounted upon said outer surface, and a cover covering said supporting plate.

4. A pulsemeter according to claim 3, wherein said cover and said supporting plate constitute a single unit.

5. A pulsemeter according to claim 1, wherein said supporting plate is a printed wiring board having a printed circuit arrangement, said lamp and said receiver being mounted upon said printed circuit arrangement.

6. A pulsemeter according to claim 5, comprising a condenser mounted upon said printed wiring board and electrically connected parallel with said lamp.

7. A pulsemeter according to claim 6, comprising contacts upon said printed wiring board for a removable connection between the supply line and said lamp, said receiver and said condenser carried by said board.

8. A pulsemeter according to claim 7, wherein said contacts are plugs.

9. A pulsemeter according to claim 1, wherein said light transmitting source is a ring-shaped light conductor located coaxially to said receiver and having a recess corresponding to the size of said lamp and located upon its side directed away from the application surface.

10. A pulsemeter according to claim 9, wherein said light conductor is made of a prefabricated plastic material, preferably polymethylmethacrylate and comprises a coating consisting preferably of evaporated on aluminum layer and reflecting light toward the application side, said coating being located upon the side of the light conductor directed away from the application side.

11. A pulsemeter according to claim 10, wherein said coating is also located upon the side walls of said light conductor and extends close to the application side.

12. A pulsemeter according to claim 1, wherein the application surface of said support member has a raised part extending between said light transmitting source and said receiver to screen the receiver from the source.

13. A pulsemeter according to claim 12, wherein said reaised part extends annularly around receiver.

14. A pulsemeter according to claim 12, wherein said light transmitting source is a ring-shaped light conductor located coaxially to said receiver and wherein said raised part is disk-shaped and is located concentrically to said light transmitting source.

15. A pulsemeter according to claim 12, wherein said raised part is about 0.4 mm. high.

16. A pulsemeter according to claim 12, comprising a foil gluable on both sides and having a side extending over the application side, said foil being recessed within the range of said raised part.