US214785A - Improvement in screw-drivers - Google Patents
Improvement in screw-drivers Download PDFInfo
- Publication number
- US214785A US214785A US214785DA US214785A US 214785 A US214785 A US 214785A US 214785D A US214785D A US 214785DA US 214785 A US214785 A US 214785A
- Authority
- US
- United States
- Prior art keywords
- bolster
- screw
- tang
- drivers
- 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
- 210000001699 lower leg Anatomy 0.000 description 10
- 241000333074 Eucalyptus occidentalis Species 0.000 description 2
- 229910001296 Malleable iron Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- 239000010959 steel Substances 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
- B23B31/117—Retention by friction only, e.g. using springs, resilient sleeves, tapers
- B23B31/1179—Retention by friction only, e.g. using springs, resilient sleeves, tapers using heating and cooling
-
- 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
- Y10T279/17—Socket type
- Y10T279/17957—Friction grip
Definitions
- the object of my invention is to furnish a bolster, against which thehandle comes, which will allow the instrument to be used with a mallet or hammer.
- the invention consists in making the tang and bolster in one piece, and in shrinking the bolster onto the shank of the instrument; also, in providing the bolster with projections, which fit into the handle and ferrule on the same, as is hereinafter morefully set forth and claimed.
- Figure '1 is a View of the screwdriver; Fig. 2, a view of the tang, bolster, and a portion of the shank; Fig. 3, a longitudinal section of the bolster and tang and Fig.4 a view of the bolster and tang.
- A, Fig. 1 is the shank or blade made of set forth round steel and flattened at the end in the usual form.
- B, Figs. 1, 2, and 4 is the bolster having the projections a, and is made in one piece with the tang O, and, preferably, of malleable iron.
- Fig. 3 is a longitudinal section of the bolster and tang, and shows the perforation a: in the bolster.
- D is the ferrule
- E is the handle.
- the bolster B is shrunk onto the shank A. The projections a fit into the slotted ferrule and handle, as shown in Fig. 1, and prevent the turning of the handle on the tang.
- the screw-driver herein described consisting of the shank A of the bolster B,-l1aving the projections a of the tang G made in one piece with the bolster, and of the slotted ferrule and handle, as shown and described.
- the bolsterB and tang 0 made in one piece, the bolster having the projections to and perforations 00, as shown and ELI MORRIS.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Description
E. M'G-RRIS. Screw-Driver.
No. 214 785. Egyteyted April 29, 1879.
NJ'EYERS, PHOTO LITHOGRAPHER, WASHINGTON D C UNITED STATES PATENT OFFICE.
' ELI MORRIS, OF NEW HAVEN ,GONNECTIOUT, ASSIGNOR OF ONE-HALF HIS RIGHT TO JOHN A. PEGKHAM, OF SAME PLACE.
IMPROVEMENT IN SCREW-DRIVERS.
Specification forming part of Letters Patent No. 214,785, dated April 29, 1879; application filed. I
' February 19, 1879.
To all whom it may concern:
Be it known that I, ELI MORRIS, of New Haven, in the county of New Haven and State of Connecticut, have invented certain new and useful Improvements in Screw Drivers, of which the following is a specification.
As screw-drivers have wed ge-shaped-ends and are frequently used as a substitute for a wedge, their handles being poundedupon and split when so used, the object of my invention is to furnish a bolster, against which thehandle comes, which will allow the instrument to be used with a mallet or hammer.
The invention consists in making the tang and bolster in one piece, and in shrinking the bolster onto the shank of the instrument; also, in providing the bolster with projections, which fit into the handle and ferrule on the same, as is hereinafter morefully set forth and claimed.
In the drawings, which I include in the specification, Figure '1 is a View of the screwdriver; Fig. 2, a view of the tang, bolster, and a portion of the shank; Fig. 3, a longitudinal section of the bolster and tang and Fig.4 a view of the bolster and tang.
To enable others to make and use my improved screwdriver, I will describe it in detail.
A, Fig. 1, is the shank or blade made of set forth round steel and flattened at the end in the usual form. B, Figs. 1, 2, and 4, is the bolster having the projections a, and is made in one piece with the tang O, and, preferably, of malleable iron.
' Fig. 3 is a longitudinal section of the bolster and tang, and shows the perforation a: in the bolster. D is the ferrule, and E is the handle. The bolster B is shrunk onto the shank A. The projections a fit into the slotted ferrule and handle, as shown in Fig. 1, and prevent the turning of the handle on the tang.
Having described my invention, what I claim as new, and desire to secure by Letters Patent, is-
1. The screw-driver herein described consisting of the shank A of the bolster B,-l1aving the projections a of the tang G made in one piece with the bolster, and of the slotted ferrule and handle, as shown and described.
2. In a screw-driver, the bolsterB and tang 0, made in one piece, the bolster having the projections to and perforations 00, as shown and ELI MORRIS.
Witnesses GEORGE TERRY, GEORGE BARNES.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US214785A true US214785A (en) | 1879-04-29 |
Family
ID=2284189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US214785D Expired - Lifetime US214785A (en) | Improvement in screw-drivers |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US214785A (en) |
-
0
- US US214785D patent/US214785A/en not_active Expired - Lifetime
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