GB376638A - Improvements in portable, motor-driven screw drivers - Google Patents
Improvements in portable, motor-driven screw driversInfo
- Publication number
- GB376638A GB376638A GB3514031A GB3514031A GB376638A GB 376638 A GB376638 A GB 376638A GB 3514031 A GB3514031 A GB 3514031A GB 3514031 A GB3514031 A GB 3514031A GB 376638 A GB376638 A GB 376638A
- Authority
- GB
- United Kingdom
- Prior art keywords
- screw
- clutch
- slidable
- casing
- spring
- 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
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
- B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
- B25B23/141—Mechanical overload release couplings
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
- Mechanical Operated Clutches (AREA)
- Transmission Devices (AREA)
Abstract
376,638. Screwing-up bolts and screws. CONNELL, E. L., 513, Greenbrier Road, Towson, Maryland, U.S.A. Dec. 18, 1931, No. 35140. [Class 83 (iii).] In a portable power-driven screw-driver the tool is driven through a friction clutch which may be adjusted to slip at a predetermined load and may also be given a further temporary adjustment to slip at a higher load, the second adjustment being such as not to affect the original adjustment when released. The machine comprises a casing 1 containing a driving motor 45 and reduction gearing 7 for rotating the tool spindle 22 which is slidable and rotatable in a bush 23 keyed to the casing at 24. The tool 34 is secured in the spindle by a ball 33 and is slidable within a guide sleeve or finder 36 which engages the head of the screw &c. being driven, and is yielding pressed forwards by a spring 38. Clutch parts 20, 21 on the driving gear 12 and spindle 22 are normally disengaged by a spring 30 but are engaged when the tool encounters the work. The initial pinion 60 of the gear train 7 is carried by ball bearings 55, 67 slidable in the casing and is connected with a ventilating fan 48, keyed to the motor shaft, through friction discs 73, 75 on the pinion shaft 65 and fan respectively. A leather &c. disc 77 may be interposed between the friction discs, the latter being pressed together by a spring 80 acting on the bearing 55 through a disc 95. The other end of the spring 80 abuts on a flange 84 on an adjusting screw 85 rotatable in a nut 90 which is slidable but not rotatable within a polygonal opening in the casing. Rotation of the screw 85 sets the clutch 73, 75 to drive home metal screws or the majority of a number of wood screws, but should any of the latter encounter an unduly hard piece of wood the pressure on the clutch may be increased by pushing the screw 85 inwards together with its nut 90, release of the screw then restoring the original pressure to the clutch. A flange 93 on the nut 90 limits its outward movement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3514031A GB376638A (en) | 1931-12-18 | 1931-12-18 | Improvements in portable, motor-driven screw drivers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3514031A GB376638A (en) | 1931-12-18 | 1931-12-18 | Improvements in portable, motor-driven screw drivers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB376638A true GB376638A (en) | 1932-07-14 |
Family
ID=10374295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3514031A Expired GB376638A (en) | 1931-12-18 | 1931-12-18 | Improvements in portable, motor-driven screw drivers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB376638A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1092399B (en) * | 1955-06-10 | 1960-11-03 | Licentia Gmbh | Power-driven hand tool, in particular screwing tool, with a clutch that can be adjusted to any torque within certain limits |
| GB2168635A (en) * | 1984-11-16 | 1986-06-25 | Matsushita Electric Ind Co Ltd | Electrically-operated driver |
-
1931
- 1931-12-18 GB GB3514031A patent/GB376638A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1092399B (en) * | 1955-06-10 | 1960-11-03 | Licentia Gmbh | Power-driven hand tool, in particular screwing tool, with a clutch that can be adjusted to any torque within certain limits |
| GB2168635A (en) * | 1984-11-16 | 1986-06-25 | Matsushita Electric Ind Co Ltd | Electrically-operated driver |
| US4617843A (en) * | 1984-11-16 | 1986-10-21 | Matsushita Electric Industrial Co., Ltd. | Electrically-operated driver |
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