US198280A - Improvement in bit-clamps for boring-machines - Google Patents
Improvement in bit-clamps for boring-machines Download PDFInfo
- Publication number
- US198280A US198280A US198280DA US198280A US 198280 A US198280 A US 198280A US 198280D A US198280D A US 198280DA US 198280 A US198280 A US 198280A
- Authority
- US
- United States
- Prior art keywords
- bit
- machines
- boring
- clamps
- improvement
- 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
- 210000001847 Jaw Anatomy 0.000 description 16
- 210000001699 lower leg Anatomy 0.000 description 4
- 230000000875 corresponding Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
- B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
- B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
- B23B31/18—Chucks with simultaneously-acting jaws, whether or not also individually adjustable pivotally movable in planes containing the axis of the chuck
-
- 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
- Y10T279/00—Chucks or sockets
- Y10T279/18—Pivoted jaw
- Y10T279/185—Internal-cone actuated
Definitions
- Figure 1 represents a side elevation of my improved bit-clamp
- Fig. 2 a vertical central section of the same.
- This invention relates to an improved bitclamp for power-machines, which is quickly adjusted to ditterently-sized shanks of bits, so as to firmly hold and quickly release the same without working loose by the motion of the machine; and the invention consists of two bit-holding jaws, that are fulcrumed to the ends of a rigid T-piece of a threaded centerpiece, the jaws being adjusted by a conical nut turning on the threaded centerpiece, and acting on the upper concaved ends of the jaws.
- A represents the center-piece, that is screwed into the lower end of the stock of the power-machine, the lower part of the same being threaded in opposite direction to the thread on the upper part, and provided at the lower end with a fixed cross-head or T-piece, B, that is rigidly keyed thereto.
- the jaws G which are provided in the customary manner, at the inside, with angular recesses or grooves a, for taking hold of the bit-shanks, in connection with a square socket-hole, b, of the center-piece.
- a conical nut, D works on the lower screw portion of the center-piece, and bears on the concaved upper ends of the jaws, so as to bring the lower ends closer together when the screwnut is turned, while admittingthe ready spreading or opening of the jaws or screwing the nut up.
- a bit-shank of any size may be firmly clamped for work, and
- the screw-nut D is provided with holes for the insertion of an adjusting lever-pin, by which the required turns of the nut are readily given until the shank is firmly clamped or released.
- bit-shanks of all sizes are self-centering, and holds a bit so as not to work loose by the motion of the machine, griping all ordinary bit-shanks and auger-shanks equally well, and being readily attached to the stock of a power-machine by the threaded shaft.
- a bit-clamp for power-machines consisting of athreaded center-piece,with bottom T-piece, fulcrum'ed jaws, and a verticallyadjustable conical screw-nut bearing on the upper ends of jaws, for setting them to the bit-shank, substantially in the manner set forth.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Description
F. DEZENDORF. Bit-Clamp for Boring-Machines.
Patented Dec. 18, 1877.
I11 velztar.
ATTORNEYSZ N. PETERS. PHOTO-LITHOGRAPNEFI. WASHINGTON. D c
UNITED STATES PATENT OFFICE.
FREDERICK DEZENDORF, OF CORNWALL-ON-HUDSON, NEW YORK.
- IMPROVEMENT IN BIT-CLAMPS FOR BORING-MACHINES.
Specification forming part of Letters Patent No. 198,280, dated December 18, 1877; application filed November 3, 1877.
To all whom it may concern:
Be itknown that I FREDERICK DEZENDORF, of Oornwall-on-the-Eudson, in the county of Orange and State of New York, have invented a new and Improved Bit-Clamp, of which the following is a specification:
In the accompanying drawings, Figure 1 represents a side elevation of my improved bit-clamp, and Fig. 2 a vertical central section of the same.
Similar letters of reference indicate corresponding parts. A
This invention relates to an improved bitclamp for power-machines, which is quickly adjusted to ditterently-sized shanks of bits, so as to firmly hold and quickly release the same without working loose by the motion of the machine; and the invention consists of two bit-holding jaws, that are fulcrumed to the ends of a rigid T-piece of a threaded centerpiece, the jaws being adjusted by a conical nut turning on the threaded centerpiece, and acting on the upper concaved ends of the jaws.
Referring to the drawings, A represents the center-piece, that is screwed into the lower end of the stock of the power-machine, the lower part of the same being threaded in opposite direction to the thread on the upper part, and provided at the lower end with a fixed cross-head or T-piece, B, that is rigidly keyed thereto.
To the recessed ends of the T-piece B are fulcrumed the jaws G, which are provided in the customary manner, at the inside, with angular recesses or grooves a, for taking hold of the bit-shanks, in connection with a square socket-hole, b, of the center-piece.
A conical nut, D, works on the lower screw portion of the center-piece, and bears on the concaved upper ends of the jaws, so as to bring the lower ends closer together when the screwnut is turned, while admittingthe ready spreading or opening of the jaws or screwing the nut up. By turning the nut down, a bit-shank of any size may be firmly clamped for work, and
by turning the nut up the same may be quick 1y taken out. The screw-nut D is provided with holes for the insertion of an adjusting lever-pin, by which the required turns of the nut are readily given until the shank is firmly clamped or released.
In this manner a powerful and quickly-adj usted bit-clamp for bit-shanks of all sizes is furnished that is self-centering, and holds a bit so as not to work loose by the motion of the machine, griping all ordinary bit-shanks and auger-shanks equally well, and being readily attached to the stock of a power-machine by the threaded shaft.
Having thus described my invention, I claim as new and desire to secure by Letters Patent A bit-clamp for power-machines, consisting of athreaded center-piece,with bottom T-piece, fulcrum'ed jaws, and a verticallyadjustable conical screw-nut bearing on the upper ends of jaws, for setting them to the bit-shank, substantially in the manner set forth.
FREDERICK DEZENDORF.
Witnesses CHAS. E. CoLDwnLL, DANIEL DRIscoLL.
Publications (1)
Publication Number | Publication Date |
---|---|
US198280A true US198280A (en) | 1877-12-18 |
Family
ID=2267687
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US198280D Expired - Lifetime US198280A (en) | Improvement in bit-clamps for boring-machines |
Country Status (1)
Country | Link |
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US (1) | US198280A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100301569A1 (en) * | 2009-06-01 | 2010-12-02 | Rohr Jr Edward John | "Bi-directional quick change tool-less lever and wedge actuated collet chuck, system and/or method for using the same" |
-
0
- US US198280D patent/US198280A/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100301569A1 (en) * | 2009-06-01 | 2010-12-02 | Rohr Jr Edward John | "Bi-directional quick change tool-less lever and wedge actuated collet chuck, system and/or method for using the same" |
US8608414B2 (en) | 2009-06-01 | 2013-12-17 | Robert Bosch Gmbh | Bi-directional quick change tool-less lever and wedge actuated collet chuck, system and/or method for using the same |
US9302329B2 (en) | 2009-06-01 | 2016-04-05 | Robert Bosch Gmbh | Bi-directional quick change tool-less lever and wedge actuated collet chuck, system and/or method for using the same |
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