GB588577A - Improvements relating to guards for machine tools - Google Patents
Improvements relating to guards for machine toolsInfo
- Publication number
- GB588577A GB588577A GB125445A GB125445A GB588577A GB 588577 A GB588577 A GB 588577A GB 125445 A GB125445 A GB 125445A GB 125445 A GB125445 A GB 125445A GB 588577 A GB588577 A GB 588577A
- Authority
- GB
- United Kingdom
- Prior art keywords
- guard
- machine
- lever
- catch
- shaft
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/22—Safety devices specially adapted for cutting machines
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanical Operated Clutches (AREA)
Abstract
588,577. Machinery guards. BRITISH THOMSON-HOUSTON CO., Ltd., and JARVIS, W. W. G. Jan. 16, 1945, No. 1254. [Class 80 (iv)] In a power operated machine tool in which power is supplied thereto through a slipping clutch, the driving shaft of the machine has releasable means for preventing its rotation, said means being released from a position in which it prevents rotation of the shaft by a connection with the operating pedal only after the latter has been moved sufficiently to depress the guard into the safety position. As shown, a guillotine has a fixed guard (not shown) mounted on arms 6 at the front of the machine and a sliding guard 21 to guard the operator at the rear of the machine. The guard 21 is connected by a link 20, lever 18 and link 17 to a lever 13 secured to the pivot shaft 14 of the operating pedal 5. A pin 15 on the lever 13 engages a slot in the forked end of a lever 12, the other end of which is slotted to receive a crank arm 11 on a spindle 10. The latter also carries a catch 8 engageable with a notch 9 in a collar fixed on the driving shaft 7, the latter being connected to the source of power through a slipping clutch. When the operator at the front of the machine depresses the pedal 5 to start the machine the guard 21 is moved downwards to a completely closed position before the pin 15 on lever 13 reaches the end of the slot in lever 12 to cause the catch 8 to be moved out of the notch in the collar, thereby permitting operation of the machine. The guard 21 is locked in its closed position by a pivoted catch 23 engaging a pin 22 on the guard. When the guillotine blade 3 reaches the bottom of its stroke, a tappet 30 on the guillotine beam engages a rod 25 which acts on a pivoted lever 27 to release the catch 23 and allow the guard 21 to rise under the action of a counterweight 29 fixed to the shaft 14. If the guard 21 does not complete its guarding movement the catch 8 is not disengaged from the notch 9 and the machine is not operated. The guard 21 may be actuated by electrical means controlled by the pedal 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB125445A GB588577A (en) | 1945-01-16 | 1945-01-16 | Improvements relating to guards for machine tools |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB125445A GB588577A (en) | 1945-01-16 | 1945-01-16 | Improvements relating to guards for machine tools |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB588577A true GB588577A (en) | 1947-05-28 |
Family
ID=9718797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB125445A Expired GB588577A (en) | 1945-01-16 | 1945-01-16 | Improvements relating to guards for machine tools |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB588577A (en) |
-
1945
- 1945-01-16 GB GB125445A patent/GB588577A/en not_active Expired
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