USRE2182E - Improvement in machines for shaving and nicking screws - Google Patents
Improvement in machines for shaving and nicking screws Download PDFInfo
- Publication number
- USRE2182E USRE2182E US RE2182 E USRE2182 E US RE2182E
- Authority
- US
- United States
- Prior art keywords
- shaving
- blank
- head
- nicking
- cutter
- Prior art date
Links
- 210000001847 Jaw Anatomy 0.000 description 20
- 210000001699 lower leg Anatomy 0.000 description 12
- 230000036633 rest Effects 0.000 description 6
- 244000145845 Chattering Species 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000010902 straw Substances 0.000 description 2
Images
Definitions
- the shank of the blank is gripped in a pair of jaws ona rotating mandrel, and rotated as in a lathe, and by combining therewith a rest to bear against the shank to steady it, and a chasing-tool on a tool-stock, which gradually approaches the head to shave it, and also a rotating cutter to cut the nick, the operation of shaving the head is performed as perfectlyas if turned in a lathe-a result which cannot be attained when the cutters for shaving the head are on a rotating mandrel while at the same time, by the use of a rest, the blank, though held in the jaws of a mandrel, which must rotate freely during the shaving operation, is held firmly (when the mandrel is stopped) during the operation of nicking, and I am enabled to perform in succession the operation of shaving, nicking, and reshaving by subjecting the blank to the three successive operations while it is held in the same jaws, although for the purpose of greater expedition I use
- 11 represents the frame, and b a shaft mounted in appropriate boxes 0 c. On this shaft there are two sets of arms,
- the shaft 1) carries on its rear end a pinion, f, the cogs of which engage a rack, 9, that slides in a part, h, of the frame. This rack is drawn down by a spring, 7:, and its lower end rests on the periphery of a cam, j, (11 the cam-shaft It.
- this cam is such that from the point 1 to 2 it is concentric to keep the rack in its lowest position, that the two mandrels may be in the same horizontal plane; from 2 to 3 it gradually runs out to iorce up the rack to turn the shaft so as to reverse the position of the mandrels, and from 3 to a the cam is concentric to retain the rack and shaft in this position, and from 4 to 1 the cam runs in toward the shaft to reshift the mandrels.
- the cam-shaft receives motion from the driving-shaft l by a pinion and cog-wheel, m m, and on the driving-shaft there is a bandwheel, n, that drives the mandrels e e one after the otherthat is to say, it drives the mandrel that is in line for presenting the blank to be shaved.
- a band, 0, passes from the band-wheel 12 around a pulley, p, on the mandrel that is in position to shave the head of the blank, thence the band passes around a tightening-pulley, q, and back to the wheel a.
- the cam j acts on and forces up the rack to shift the mandrels, by which the blank which has been shaved is presented on the other side to a nicking-saw, 0, on an appropriate arbor mounted in the upper end of a lever, 01, that turns on a fulcrum at e, the lower arm of the said lever being provided with a wrist-pin, j, which is kept in contact with the face of the cam 9 (represented as developed at Fig.8) by the tension of a spring, h.
- the form of the cam is such as to carry the nicking-saw toward the head of the blank to cut the nick and then back when the nick is completed.
- the arbor of the saw is provided with a pulley, i, by which it is driven by some first mover.
- the shank of the blank is held firmly by a permanent rest, j, on one side, and a movable rest, It, on the other.
- This movable rest is on a rocker, Z, provided with an arm, m, acted upon by a cam, n, on the cam-shaft. While the nicking operation on this blank is going on, a blank previously nicked is presented to the action of the shaver, and the rest and;
- shaving-cutter are again carried up to remove the burrs, but no more.
- cams that give the motions to the rest and the shaving-cutter for the shaving operations are made to acton the parts to be operated twice to once of the cams which operate the movable rest and nickingsaw for the nicking operation, for the reason that the two shaving operations are perform edthat is, the last shaving on one blank and the first shaving on anotherwhile a blank is being nicked.
Family
ID=
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| USRE2182E (en) | Improvement in machines for shaving and nicking screws | |
| US632678A (en) | Tool for cutting screw-threads. | |
| US8456A (en) | sloan | |
| US633548A (en) | Scoring-tool for veneer-lathes. | |
| US552717A (en) | Form-turning machine | |
| US8155A (en) | Improvement in the method of finishing the heads of screws | |
| US611811A (en) | hormby | |
| US1659385A (en) | Attachment for machine tools for turning and boring irregular surfaces | |
| US938304A (en) | Gear-cutting machine. | |
| US300041A (en) | Machine for threading sc rew-taps | |
| US54096A (en) | Improved screw-tap | |
| US350141A (en) | Machine for facing counterbores | |
| US302239A (en) | Screw threads upon conical articles | |
| US1317311A (en) | Pmnooralt | |
| US491256A (en) | Waltee lee cheney | |
| US148A (en) | Improvement in machines for nicking and turning the heads of wood-screws | |
| US27370A (en) | Machine for finishing plugs of stop-cocks | |
| US108648A (en) | Improvement in machines for shaving the heads of screw-blanks | |
| US861567A (en) | Device for cutting screw-threads. | |
| US870499A (en) | Screw-machine. | |
| US569554A (en) | And lynn | |
| US177976A (en) | Improvement in machines for threading screws | |
| US287688A (en) | Wood-turning lathe | |
| US125269A (en) | Improvement in machines for threading wood screws | |
| US242468A (en) | Hub-lathe |