PatentVote.com: Vote on your favourite invention!

Next ten patents ordered by date:
Produce grader
High speed optical matrix multiplier system
Polarization excitation device for X-ray fluorescence analysis
X-Ray topograph reproducing apparatus
Method and device for sampling gases
Method and apparatus for the separation of isotopes
Methods and apparatus for analyzing mixtures
Virtual image type double focusing mass spectrometer
Method and apparatus for processing a video signal from a scanning electron microscope
Method of and an apparatus for examining a sample or a material by measuring the absorption of .gamma.- or x-ray radiation
Translate:
En
De
Es
Fr
It
Pt
Ja
Ko
Zh 

 

Title: Photoelectric guard

Abstract: This invention relates to a protective guard for surrounding hazardous parts of a machine. The guard comprises a photoelectric barrier, connected to a circuit which will shut down the machine both when the photoelectric beam is broken, and also when a part of the photoelectric system fails to operate correctly.


Do you think this is a good invention? Vote now:

 Votes so far: For:(0) Against:(0)
Other info:


Inventors: Bechtel, Klaus (Osthofen, DT)

Application Number: 506837
Filing Date: 1974-09-17
Publication_date: 1976-03-16
Assignee: Visomat-Gerate GmbH (Mainz, DT)
Primary Class(es): 250/221 250/208.4, 340/556
Other Classes:
US Patent Ref:
2912683Apr, 1959Bagno340/258.
3742222Jun, 1973Endl250/209.
3787700Jan, 1974Chasson250/222.
3810148May, 1974Karsten et al.250/221.
3859647Jan, 1975Ross340/258.

Other Refs: 728,331
Nov, 1942DD

Primary Examiner: Stolwein, Walter
Assistant Examiner:
Attorney: Holman & Stern