GB731051A - Improvements relating to press guards - Google Patents
Improvements relating to press guardsInfo
- Publication number
- GB731051A GB731051A GB614252A GB614252A GB731051A GB 731051 A GB731051 A GB 731051A GB 614252 A GB614252 A GB 614252A GB 614252 A GB614252 A GB 614252A GB 731051 A GB731051 A GB 731051A
- Authority
- GB
- United Kingdom
- Prior art keywords
- guard
- cam
- brake
- switch
- clutch
- 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
- F16P3/02—Screens or other safety members moving in synchronism with members which move to and fro
- F16P3/04—Screens or other safety members moving in synchronism with members which move to and fro for machines with parts which approach one another during operation, e.g. for stamping presses
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
- Control Of Presses (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
731,051. Machinery guards. FAIRWAY ENGINEERING CO., Ltd., and ROSE, M. B June 5, 1953 [March 10, 1952], No. 6142/52. Class 80 (4). [Also in Group XL (b)] In a brake press, or other press, wherein a sliding guard 6 is actuated by a cam shaft 4 which also controls the operation of the ram and which is driven by a continuously running electric motor through an electrically controlled clutch and brake, switches 22 in the brake and clutch circuits are operated by a safety rail 21, which may be in sections, resiliently mounted along the bottom edge of the guard so that should the rail meet an obstruction, such as an operator's hand, the cam shaft 4 is brought to rest. Alternatively the brake and clutch may be controlled by a stationary photo-cell co-operating with a stationary light beam passing immediately above the work and under the lowest position of the guard, so that an operator's hand or other obstruction is forced downwards to interrupt the light beam. In operation, on depression of a foot switch the brake is released and the clutch engaged to rotate the cam shaft 4, whereupon cams 5 thereon lower the guard against the action of return springs 19. As the guard closes, a cam 7 opens an air valve to start the ram shaft 9 and a cam 10 closes a switch to energize a solenoid which holds the valve open. A cam 13 opens a switch to stop the cam shaft 4 after one revolution, while a cam 15 on the ram shaft 9 opens a switch to release the air valve after one stroke. The cams 5 allow the guard 6 to be raised rapidly by the springs 19 just before the work is shaped, to avoid obstruction of the work by the guard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB614252A GB731051A (en) | 1952-03-10 | 1952-03-10 | Improvements relating to press guards |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB614252A GB731051A (en) | 1952-03-10 | 1952-03-10 | Improvements relating to press guards |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB731051A true GB731051A (en) | 1955-06-01 |
Family
ID=9809186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB614252A Expired GB731051A (en) | 1952-03-10 | 1952-03-10 | Improvements relating to press guards |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB731051A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3179763A (en) * | 1960-02-26 | 1965-04-20 | Kummer Freres S A Fabrique De | Electrical switching means providing a safety feature in automatic machinery |
| US3315049A (en) * | 1965-09-15 | 1967-04-18 | Gardiner M Cain | Safety switch means for machine having a power-stroking operation |
| US3487182A (en) * | 1969-02-06 | 1969-12-30 | Positive Safety Mfg Co The | Safety mechanism for power-operated presses and the like |
-
1952
- 1952-03-10 GB GB614252A patent/GB731051A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3179763A (en) * | 1960-02-26 | 1965-04-20 | Kummer Freres S A Fabrique De | Electrical switching means providing a safety feature in automatic machinery |
| US3315049A (en) * | 1965-09-15 | 1967-04-18 | Gardiner M Cain | Safety switch means for machine having a power-stroking operation |
| US3487182A (en) * | 1969-02-06 | 1969-12-30 | Positive Safety Mfg Co The | Safety mechanism for power-operated presses and the like |
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