US2571589A - Boring attachment for electric hand drills - Google Patents
Boring attachment for electric hand drills Download PDFInfo
- Publication number
- US2571589A US2571589A US714979A US71497946A US2571589A US 2571589 A US2571589 A US 2571589A US 714979 A US714979 A US 714979A US 71497946 A US71497946 A US 71497946A US 2571589 A US2571589 A US 2571589A
- Authority
- US
- United States
- Prior art keywords
- electric hand
- boring
- attachment
- bit
- housing
- 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 - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27C—PLANING, DRILLING, MILLING, TURNING OR UNIVERSAL MACHINES FOR WOOD OR SIMILAR MATERIAL
- B27C3/00—Drilling machines or drilling devices; Equipment therefor
- B27C3/08—Operator-supported drilling machines or devices
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/65—Means to drive tool
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/91—Machine frame
Definitions
- My invention relates to boring devices, and more particularly, to a boring attachment for electric hand drills which affords a power unit for driving a bit.
- This attachment is especially designed for use in boring holes in joists, partitions and the like and through which holes electric cables are to be threaded during the installation of electric wiring.
- Another object of this invention is to provide such an attachment for boring holes in restricted places, especially in old structures.
- a further object of this invention is to provide such an attachment that can be quickly and easily adjusted for holding a bit at a predetermined elevation.
- the invention consists of the novel devices and combinations of devices hereinafter described and defined in the claim.
- Fig. 1 is a fragmentary edge elevational view of the boring attachment having an electric hand drill mounted thereon; I-
- Fig. 2 is a fragmentary side elevational view o the invention as shown in Fig. 1;
- Fig. 3 isla detail view principally in section taken on the line 3-3 of Fig. 2, on an enlarged scale;
- Fig. 4 isa detail view principally in section taken on the line 4-4 of Fig. 1, on an enlarged scale.
- the numeral 5 indicates a long tubular housing for a drive shaft 6 and having a radially projecting handle 1. This housing 5 is attached to a tubular standard 8 by an adjustable clamp 9.
- This clamp 9 comprises two overlapped atplates
- the clamp 9 permits relative endwise adjustment of the housing 5 and the standard 8 to vary their combined operative length. This clamp 9 holds the housing 5 and the standard 8 parallel and laterally spaced and also permits relative adjustment of said housing and standard toward or from each other.
- a long round rod I6 Slidably mounted in the standard 8 is a long round rod I6, the outer end portion of which is pointed at I1 for engagement with a floor or other base of resistance for supporting the tool.
- the rod I6 is adjustably secured to the standard 8 for endwise adjustment by a set-screw
- This bit 25 is turned by an electric hand drill, indicated as an entirety by the numeral 3
- is detachably secured to the standard 8 by a union 33.
- the inner end of the drive shaft 6 is held in the chuck 32 and driven from the drill 3
- may be very quickly and easily removed from the boring attachment simply by manipulating the union 33 and releasing the clutch 32.
- a long upright rod having on its lower end a floor-engaging member, a long tubular member telescoped onto the rod for endwise adjustment, means for securing the tubular member toy the rod where endwise adjusted thereon, a hand drill having an upstanding chuck with its axis parallel to the axis of the rod, a tting attaching the hand drill to the tubular member to turn about an axis perpendicular to the axis of the tubular member, a long tubular housing parallel to the tubular member, a clamp securing the tubular housing to the tubular member for relative lateral and swinging adjustment'about the axis of the tubular member to align its axis with the axis of the chuck, a drive shaft in the tubular housing with its lower end portion held by the chuck, a bearingV on the upper end portion of the housing, a bit holder journaled in the bearing, and meshingy 4 REFERENCES CITED The following references are of record in the le of this
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Drilling And Boring (AREA)
Description
Oct. 16, 1951 c. G. LINDELL BORING ATTACHMENT FOR ELECTRIC HAND DRILLS Filed Dec. 9, 1946 Patented Oct. 16, 1951 UNITED .STATES PATENT oFFIcE BORING ATTACHMENT FOR ELECTRIC VIIAND DRILLS Carl G. Lindell, Minneapolis, Minn. Application December 9, 1946, Serial No. 714,979
l Claim. 1
My invention relates to boring devices, and more particularly, to a boring attachment for electric hand drills which affords a power unit for driving a bit. This attachment is especially designed for use in boring holes in joists, partitions and the like and through which holes electric cables are to be threaded during the installation of electric wiring.
It is an object of this invention to provide a boring attachment for electric hand drills that is comparatively inexpensive to manufacture and wherein the electric hand drill may be used for other purposes.
Another object of this invention is to provide such an attachment for boring holes in restricted places, especially in old structures.
A further object of this invention is to provide such an attachment that can be quickly and easily adjusted for holding a bit at a predetermined elevation.
Other objects of this invention will be apparent from the following description, reference being had to the drawing.
To the above end, generally stated, the invention consists of the novel devices and combinations of devices hereinafter described and defined in the claim.
In the accompanying drawing, which illustrates the invention, like characters indicate like parts throughout the several views.
Referring to the drawing:
Fig. 1 is a fragmentary edge elevational view of the boring attachment having an electric hand drill mounted thereon; I-
Fig. 2 is a fragmentary side elevational view o the invention as shown in Fig. 1;
Fig. 3 isla detail view principally in section taken on the line 3-3 of Fig. 2, on an enlarged scale; and
Fig. 4 isa detail view principally in section taken on the line 4-4 of Fig. 1, on an enlarged scale.
The numeral 5 indicates a long tubular housing for a drive shaft 6 and having a radially projecting handle 1. This housing 5 is attached to a tubular standard 8 by an adjustable clamp 9.
This clamp 9, as shown, comprises two overlapped atplates |0 and adjustably connected by a pair of screws I2 that extend through elone gated slots I3 in the plate I0 and have threadedv The outer endscrews I4 which extend through holes in the re.
spective end portion of the plate I0 and have threaded engagement with the body portion of said plate. The outer end portion of the plate I I is folded around the standard 8 and frictionally clamped thereon by screws I5 that extend through holes in the respective end portion of the plate I I and have threaded engagement with the body portion of said plate. Obviously, the clamp 9 permits relative endwise adjustment of the housing 5 and the standard 8 to vary their combined operative length. This clamp 9 holds the housing 5 and the standard 8 parallel and laterally spaced and also permits relative adjustment of said housing and standard toward or from each other.
Slidably mounted in the standard 8 is a long round rod I6, the outer end portion of which is pointed at I1 for engagement with a floor or other base of resistance for supporting the tool. The rod I6 is adjustably secured to the standard 8 for endwise adjustment by a set-screw |8 having threaded engagement with a loose collar I9 on said standard, extends through a hole in the standard 8 and impinges the rod I6, see Fig. 4.
The drive shaft 6 extends outwardly of the outer end of the housing 5 and mounted vthereon is a bevel gear 20, that meshes with a bevel gear 2| on a bit holder '22. This bit holder 22 is a cylindrical member having an axial bore 23 for the shank 24 of a bit 25. The bit holder 22 is journaled in a bearing 26 attached to the outer end of the housing 5 Iby a bracket 21. Said bit holder 22 is held in the bearing 2B against axial movement by the gear 2| and a collar 28 attached to said bit holder by a set screw 29. The bit shank 24 is removably held in the bit holder 22 by two set screws 30. This mounting and driving of the bit 25 makes a very compact structure and positions the bit 25 close to the housing 5 that facilitates the entering of said bit into a very restricted area, which is highly important when boring holes in old structures.
This bit 25 is turned by an electric hand drill, indicated as an entirety by the numeral 3|, with the exception of its chuck 32. This drill 3| is detachably secured to the standard 8 by a union 33. The inner end of the drive shaft 6 is held in the chuck 32 and driven from the drill 3|.
Obviously, the drill 3| may be very quickly and easily removed from the boring attachment simply by manipulating the union 33 and releasing the clutch 32.
What I claim is:
In a device of the class described, a long upright rod having on its lower end a floor-engaging member, a long tubular member telescoped onto the rod for endwise adjustment, means for securing the tubular member toy the rod where endwise adjusted thereon, a hand drill having an upstanding chuck with its axis parallel to the axis of the rod, a tting attaching the hand drill to the tubular member to turn about an axis perpendicular to the axis of the tubular member, a long tubular housing parallel to the tubular member, a clamp securing the tubular housing to the tubular member for relative lateral and swinging adjustment'about the axis of the tubular member to align its axis with the axis of the chuck, a drive shaft in the tubular housing with its lower end portion held by the chuck, a bearingV on the upper end portion of the housing, a bit holder journaled in the bearing, and meshingy 4 REFERENCES CITED The following references are of record in the le of this patent:
UNITED STATES PATENTS Number Name Date 757,734 Gadfleld Apr. 19, 1904 1,426,476 Henderson Aug. 22, 1922 1,859,133 v Fitzgerald May 17, 1932 2,143,975 Crofton Jan. 17, 1939 2,208,025 Feucht July 16, 1940 2,291,729 Koets Aug. 4, 1942 FOREIGN PATENTS Number Country Date 702,854 Germany Feb. 18, 1941
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US714979A US2571589A (en) | 1946-12-09 | 1946-12-09 | Boring attachment for electric hand drills |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US714979A US2571589A (en) | 1946-12-09 | 1946-12-09 | Boring attachment for electric hand drills |
Publications (1)
Publication Number | Publication Date |
---|---|
US2571589A true US2571589A (en) | 1951-10-16 |
Family
ID=24872237
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US714979A Expired - Lifetime US2571589A (en) | 1946-12-09 | 1946-12-09 | Boring attachment for electric hand drills |
Country Status (1)
Country | Link |
---|---|
US (1) | US2571589A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2711199A (en) * | 1952-06-13 | 1955-06-21 | Oscar B Salsberg | Drill extension |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US757734A (en) * | 1903-07-17 | 1904-04-19 | Charles E Gadfield | Boring-machine. |
US1426476A (en) * | 1920-03-13 | 1922-08-22 | Henderson Robert Halsey | Collapsible joist-boring machine |
US1859133A (en) * | 1931-06-04 | 1932-05-17 | Fitzgerald Mfg Co | Handle and motor assembly for electric utility devices |
US2143975A (en) * | 1936-08-11 | 1939-01-17 | Crofton Harold Buston | Portable drilling machine |
US2208025A (en) * | 1938-07-26 | 1940-07-16 | Cleveland Rock Drill Co | Supporting means for rock drills |
DE702854C (en) * | 1937-09-18 | 1941-02-18 | Friedrich Klingl | Portable knothole drill |
US2291729A (en) * | 1940-01-16 | 1942-08-04 | Albert C Koett | Drilling apparatus |
-
1946
- 1946-12-09 US US714979A patent/US2571589A/en not_active Expired - Lifetime
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US757734A (en) * | 1903-07-17 | 1904-04-19 | Charles E Gadfield | Boring-machine. |
US1426476A (en) * | 1920-03-13 | 1922-08-22 | Henderson Robert Halsey | Collapsible joist-boring machine |
US1859133A (en) * | 1931-06-04 | 1932-05-17 | Fitzgerald Mfg Co | Handle and motor assembly for electric utility devices |
US2143975A (en) * | 1936-08-11 | 1939-01-17 | Crofton Harold Buston | Portable drilling machine |
DE702854C (en) * | 1937-09-18 | 1941-02-18 | Friedrich Klingl | Portable knothole drill |
US2208025A (en) * | 1938-07-26 | 1940-07-16 | Cleveland Rock Drill Co | Supporting means for rock drills |
US2291729A (en) * | 1940-01-16 | 1942-08-04 | Albert C Koett | Drilling apparatus |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2711199A (en) * | 1952-06-13 | 1955-06-21 | Oscar B Salsberg | Drill extension |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2303565A (en) | Power tool | |
US2679770A (en) | Tool selective device | |
US4082474A (en) | Drill attachment | |
US2545659A (en) | Adjustable handle for tools | |
US2374919A (en) | Milling and drilling adapter for boring bars | |
US2779259A (en) | Soil stirring device | |
US4796319A (en) | Combination screw-tapping and screwdriving tool | |
US2318172A (en) | Universal tool | |
US2662562A (en) | Saw attachment for electric hand drills | |
US2291729A (en) | Drilling apparatus | |
US2571589A (en) | Boring attachment for electric hand drills | |
US2674907A (en) | Drill jig | |
US3329043A (en) | Drilling machine for bowling balls | |
US2978931A (en) | Drill stop | |
US2340941A (en) | Burring attachment for drills | |
US4012162A (en) | All purpose magnetic base drill | |
US2617455A (en) | Portable boring machine | |
US4082473A (en) | Manually operated hand drill | |
US2242475A (en) | Motorized hand tool | |
US2164455A (en) | Shaft indexing device | |
US2465541A (en) | Tapping accessory for drill presses | |
US2642761A (en) | Drill press attachment | |
US2464660A (en) | Drill press converter and power take-off for rotary saws | |
US2373927A (en) | Centering attachment | |
US2341926A (en) | Lathe chuck |