WIPO logo
Mobile | Deutsch | Español | Français | 日本語 | 한국어 | Português | Русский | 中文 | العربية |
PATENTSCOPE

Search International and National Patent Collections
World Intellectual Property Organization
Search
 
Browse
 
Translate
 
Options
 
News
 
Login
 
Help
 
Machine translation
1. (WO1980000036) INTRUSION DETECTOR FOR PRESS BRAKE
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1980/000036    International Application No.:    PCT/US1979/000379
Publication Date: 10.01.1980 International Filing Date: 05.06.1979
IPC:
F16P 3/14 (2006.01), G01V 8/20 (2006.01)
Applicants:
Inventors:
Priority Data:
913253 06.06.1978 US
Title (EN) INTRUSION DETECTOR FOR PRESS BRAKE
(FR) DETECTEUR D"INTRUSION POUR PRESSE PLIEUSE
Abstract: front page image
(EN)An intrusion detection system is disclosed for safeguarding an operator of an industrial machine such as a press brake. A light screen barrier (420) comprises sequentially pulsed beams (422) which are spaced far enough apart to permit penetration by a work piece (144) without obstructing more than one beam whereas penetration by the operator"s hand will obstruct at least two adjacent, successively pulsed beams. A pulse train of regularly spaced signal pulses (BRS) with each pulse corresponding to a light beam is produced when none of the light beams are obstructed. A missing pulse detector (600, 40") with a logic circuit (502) produces a control signal for stopping the machine only when two or more adjacent light beams are obstructed causing two or more successive missing pulses in the pulse train.
(FR)Un systeme de detection d"intrusion protege un operateur travaillant sur une machine industrielle telle qu"une presse plieuse. Une barriere a ecran lumineux (420) comprend des rayons pulses successifs (422) qui sont espaces suffisamment pour permettre l"introduction d"une piece a travailler (144) sans provoquer l"obstruction de plus d"un rayon tandis que la penetration de la main de l"operateur provoquera l"interruption d"au moins deux rayons pulses successifs adjacents. Un train pulse de signaux espaces regulierement (BRS) dont chaque pulsation correspond a un rayon lumineux est produit lorsqu"aucun des rayons lumineux n"est interrompu. Un detecteur d"absence de pulsations (600, 40") avec un circuit logique (502) produit un signal de commande pour arreter la machine seulement lorsque deux ou plusieurs rayons lumineux adjacents sont interrompus, provoquant l"absence de deux ou plusieurs pulsations successives dans le train de pulsations.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)