US170949A - Improvement in screw-cutting-die holders - Google Patents
Improvement in screw-cutting-die holders Download PDFInfo
- Publication number
- US170949A US170949A US170949DA US170949A US 170949 A US170949 A US 170949A US 170949D A US170949D A US 170949DA US 170949 A US170949 A US 170949A
- Authority
- US
- United States
- Prior art keywords
- screw
- cutting
- improvement
- die
- bolt
- 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 2
- 238000010276 construction Methods 0.000 description 2
- 230000000284 resting Effects 0.000 description 2
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G1/00—Thread cutting; Automatic machines specially designed therefor
- B23G1/02—Thread cutting; Automatic machines specially designed therefor on an external or internal cylindrical or conical surface, e.g. on recesses
- B23G1/08—Machines with a plurality of working spindles
Definitions
- Screw-Cutting is used for cutting screw-threads upon bolts by means of suitable dies fixed in one part of the machine, while the bar upon which the thread is to be cutis rotated by suitable mechanism, so as to pass through the die.
- the bolt is usually turned by a mechanism similar to the head of a lathe, While a number of dies are held in sockets around the circumference of a rotating' disk or barrel, so as to cut different threads in the same machine by placing the proper die opposite the end ofthe bolt.
- My invention consists in suspending the rotating barrel holding the several dies upon trunnions, so that the bolt can pass entirely through it when desired, and cut a thread ot' any required length.
- Figure l is a side view of my improved mechanism
- Fig. 2 is a top view of the same.
- A is the head or slide which carries the rotating die-holder B.
- This die-holder B is a short hollow cylinder, with circular openings C around its circumference, in which the screw-cutting dies are placed and secured by set-screws D. There are an even number of these openings C, so that one is always diametrically opposite to another, to permit ot' passing a bar or bolt entirely through the barrel B.
- This construction permits of any length of screw being cut upon a bar or bolt.
- One end of a bar, or the head of a bolt is secured in the jaws of the head in the usual manner, and as it revolves the die is pressed up to the other end.
- the screw is cut the end of the bolt passes into the barrel B, and, if a long screw is required, out through the opposite opening to any length desired.
- G is a lockingfbolt attached to the box or frame A, which is actuated by a spring, and is pressed into one of the holes H, when the dies are in a proper position to operate.
- two ofthe openings C are horizontal, and in line with the axis of B; but, as the trunnions E F do not cross the interior part of B, the bolt can pass horizontally through it, in the manner described.
Description
J. s. GRANL *SCREW-CUTTING DIE HOLDER.
Patented- Dec. 14, 1875.
Illllql!! Il lllvl/ [n We fait N- PETERS, PHOTLTHOGRPNER, WSHINGTON. D C.
` UNITED STATES PATENT OFFICE.
JOHN J. GRANT, OF HARTFORD, CONNECTICUT, ASSIGNOR TO THE PRATT & WHITNEY COMPANY, OF SAME PLACE.
IMPROVEMENT IN SCREW-CUTTING-DIE HOLDERS.
Specification forming part of Letters Patent No. 170,949, dated December 14, 1875; application led November 15, 1875.
To all whom it may concern:
Be it known that I, JOHN J. GEANT, of Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Screw-Cutting are used for cutting screw-threads upon bolts by means of suitable dies fixed in one part of the machine, while the bar upon which the thread is to be cutis rotated by suitable mechanism, so as to pass through the die. The bolt is usually turned by a mechanism similar to the head of a lathe, While a number of dies are held in sockets around the circumference of a rotating' disk or barrel, so as to cut different threads in the same machine by placing the proper die opposite the end ofthe bolt. These rot-ating disks have been heretofore constructed with an axis passing through their centers, and resting in the frame of the machine, or a sliding block, which advanced as the thread was out. This 'axis prevents the bolt from passing beyond it, and limits the length of thread that can be cut.
My invention consists in suspending the rotating barrel holding the several dies upon trunnions, so that the bolt can pass entirely through it when desired, and cut a thread ot' any required length.
In the accompanying drawing, Figure l is a side view of my improved mechanism, and Fig. 2 is a top view of the same.
A is the head or slide which carries the rotating die-holder B. This die-holder B is a short hollow cylinder, with circular openings C around its circumference, in which the screw-cutting dies are placed and secured by set-screws D. There are an even number of these openings C, so that one is always diametrically opposite to another, to permit ot' passing a bar or bolt entirely through the barrel B. E and Fare trunnions, forming the axis of the barrel B, upon which it rotates. In the drawing they are represented as attached to the box A, with journal-bearings in the sides of the barrel B; but they may lform part of B, and rest in bearings in A. ln either case the central part of the cylinder B is left open, so n that a bar can be passed through one ot' the apertures C, and out through the opposite one across the center of B.
This construction permits of any length of screw being cut upon a bar or bolt. One end of a bar, or the head of a bolt, is secured in the jaws of the head in the usual manner, and as it revolves the die is pressed up to the other end. As the screw is cut the end of the bolt passes into the barrel B, and, if a long screw is required, out through the opposite opening to any length desired.
G is a lockingfbolt attached to the box or frame A, which is actuated by a spring, and is pressed into one of the holes H, when the dies are in a proper position to operate. In this case two ofthe openings C are horizontal, and in line with the axis of B; but, as the trunnions E F do not cross the interior part of B, the bolt can pass horizontally through it, in the manner described.
What I claim as my invention is- The revolving die-holder B, whenprovided with trunnions E F, which leave the center unobstructed, and an even number of openin gs,C, forholdin g thedies placed diametrically opposite each other on the barrel, substantially as and for the purpose herein described.
JOHN J. GRANT.
Witnesses:
THEO. G. ELLIS, WENDELL R. CURTIs.
Publications (1)
Publication Number | Publication Date |
---|---|
US170949A true US170949A (en) | 1875-12-14 |
Family
ID=2240356
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US170949D Expired - Lifetime US170949A (en) | Improvement in screw-cutting-die holders |
Country Status (1)
Country | Link |
---|---|
US (1) | US170949A (en) |
-
0
- US US170949D patent/US170949A/en not_active Expired - Lifetime
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2358741A (en) | Automatic flat - bottom countersinking attachment for milling machines | |
US170949A (en) | Improvement in screw-cutting-die holders | |
US1159790A (en) | Oiling mechanism for machine-tools. | |
US1889136A (en) | Boring machine | |
US252515A (en) | Moses w | |
US767592A (en) | Machine-tool stop. | |
US68064A (en) | Improvement in milling-tools | |
US3308696A (en) | Lathe live center | |
US1065774A (en) | Mold-forming mechanism. | |
US316330A (en) | Adjustable screw-cutting die-stock | |
US1883397A (en) | Diestock | |
US1272188A (en) | Turret. | |
US1604114A (en) | Tool-slide mechanism | |
US777952A (en) | Boring-bar. | |
US576717A (en) | Turret-machine | |
US115291A (en) | Luthee e | |
US162458A (en) | Improvement in machines for boring cylinders | |
US873886A (en) | Axle-cutter. | |
US2596482A (en) | Tool-holding indexing turret | |
US166462A (en) | Improvement in shell-cutters for metal-turning lathes | |
US1250113A (en) | Die-stock. | |
US2763488A (en) | Chuck with adjustable tool bar support | |
US758840A (en) | Screw-cutting implement. | |
US180869A (en) | Improvement in devices for cutting screw-threads | |
US120351A (en) | Improvement in holders for screw-cutting dies |