GB657455A - Improvements in or relating to apparatus for avoiding the premature actuation of machine operating handles - Google Patents
Improvements in or relating to apparatus for avoiding the premature actuation of machine operating handlesInfo
- Publication number
- GB657455A GB657455A GB454549A GB454549A GB657455A GB 657455 A GB657455 A GB 657455A GB 454549 A GB454549 A GB 454549A GB 454549 A GB454549 A GB 454549A GB 657455 A GB657455 A GB 657455A
- Authority
- GB
- United Kingdom
- Prior art keywords
- handle
- electromagnet
- energized
- armature
- latch arm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
- F16P3/00—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body
- F16P3/001—Safety devices for guarding the human operator of punch presses or like machine tools performing an opening and closing travel
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
657,455. Machinery safety devices. METAL BOX CO. Ltd., PORTER, E. M. J., and CLARKE, C. S. Feb. 18, 1949, No. 4545. [Class 80(iv)] The starting handle 1 of a machine is locked in the " safe " position, against a stop 3, by a spring- loaded latch arm 11 of a bell-crank lever which is linked to the pivoted armature 7 of an electromagnet 4, the latch arm 11 cooperating with a pin 12 carried by the starting handle. The electromagnet 4 is energized upon the closing of one or more safety switch devices (which may be operated by guards, not shown), and, upon energization, the armature 7 moves the latch arm 11 and allows the handle 1 to be raised to start the machine. A second armature 15 carried by the pin 12 serves to retain the handle in its raised position, the electromagnet 4 being sufficiently powerful to hold both armatures 7 and 15 and prevent movement by normal means of the handle. When a safety switch is opened, or upon manual operation of a push button in the same circuit, the electromagnet 4 is de-energized and the handle 1 returned to the " safe " position under gravitational or spring action. Rapid de-energization of the electromagnet may be assisted by the provision of a small continuously - energized reverse winding, which may be connected in series with a resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB454549A GB657455A (en) | 1949-02-18 | 1949-02-18 | Improvements in or relating to apparatus for avoiding the premature actuation of machine operating handles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB454549A GB657455A (en) | 1949-02-18 | 1949-02-18 | Improvements in or relating to apparatus for avoiding the premature actuation of machine operating handles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB657455A true GB657455A (en) | 1951-09-19 |
Family
ID=9779176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB454549A Expired GB657455A (en) | 1949-02-18 | 1949-02-18 | Improvements in or relating to apparatus for avoiding the premature actuation of machine operating handles |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB657455A (en) |
-
1949
- 1949-02-18 GB GB454549A patent/GB657455A/en not_active Expired
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