US422174A - Ors to the waite - Google Patents
Ors to the waite Download PDFInfo
- Publication number
- US422174A US422174A US422174DA US422174A US 422174 A US422174 A US 422174A US 422174D A US422174D A US 422174DA US 422174 A US422174 A US 422174A
- Authority
- US
- United States
- Prior art keywords
- blank
- wheel
- carbon
- waite
- electrodes
- 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
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 24
- 229910052799 carbon Inorganic materials 0.000 description 24
- 238000004519 manufacturing process Methods 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 240000001973 Ficus microcarpa Species 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/02—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work
- B24B5/04—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding cylindrical surfaces externally
Description
Patented Peb.25,1890.
. I Q/ -Z M i. f ,N
S. H. BARTLETT 8v H. E. WAITIL eRINDINe BLEGTRODBS Foe MIGRQPHONBS.
M j w i m, w o e (No Model.)
UNITED STATES PATENT OEEICE.
SAMUEL H. BARTLETT AND HENRY E. VAITE, OF NEW7 YORK, ASSIGN- ORS TO THE VAITE & BARTLETT MANUFACTURING COMPANY, OF SAME PLACE.
GRINDING ELECTRODES FgoR MICROPHONES.
SPECIFICATION forming part of Letters Patent'No.422,1'74, dated February 25, 1890.
Application filed June 9, 1884:. Serial No. 134,352. (No model.)
To all whom it may concern:
Be it known that we, SAMUEL H. BARTLETT and HENRY E. WAITE, citizens ofthe United States, residing in the city, county, and State of New York, have invented certain new and useful Improvements in Grinding Electrodes for Microphones, of which the following is a specification.
O ur invention relates to the grinding of elecxo trodes for microphones; and it consists in subjecting a cylinder of carbon to the operations hereinafter fully set forth, so as to rapidly reduce the ends to any desired extent and without danger' of fracture.
Our inventionfurther consists of apparatus for eecting the desired operations upon the cylinder.
In the accompanying drawings, Figure l is a plan of apparatus which we employ in the zo manufacture of microphone-electrodes. Fig. 2 is a section on the line l 2, Fig. l. Fig. 3 is a longitudinal section of the holder. Fig. l is a perspective view of the carbon blank. Fig. 5 is a perspective view of the completed eleclt is usual in some classes of microphones to employ electrodes of carbon consisting of cylinders or pencils with terminal stems or iingers, as illustrated in Fig. 5. The manufacture of these electrodes each from one blank of carbon has proved to be difficult and expensive, as they must be made from cylinders or blanks of carbon of the shape of the blank X, Fig. li, and the reduction of the blank at the 3 5 ends to form the fingers a, owing to the hardness of the carbon, is difficult and apt to result in the fracture of the blank, and when such fracture ensues after a great part of the labor has been performed there is a considerable 4o loss of time and labor, and consequent expense. The fracture is most apt to result as the electrode approaches completion, when the ngers have been reduced in size, as the cutter must bear upon the thin stems with sufficient force to cut away the surface without breaking them away from the main cylinder. l'leretofore no mode of operation has been devised that would eect this result with certainty.
We have discovered that by using an emery- 5o wheel traveling at the periphery at a high speed and supplied with water to keep it moist, and by cutting the blank in the direction of its length, we are enabled to cut the carbon with rapidity without subjecting the same to such pressure as to result in fracturing the material. The use of dry wheels will not effect the purpose; but we have found that when the wheel is moistened it has a peculiar capacity and special adaptability for acting upon car- 6o bon, and will cut it with great ease and rapidity. The carbon block is presented to the edge of the wheel and revolved and moved toward the wheel until reduced to the desired extent. to be effective in these operations is shown in the drawings.
A is the frame, of suitable shape to support the bearings of the emerywheel B, and of a sliding and rotating holder or cylinder C. 7o The shaft of the wheel B is provided with a pulley c, receiving the driving-belt b, 'and the holder C fits a cylindrical socket or recess in the bearing-block E, and is provided with a handle or crank I, so that it may be both revolved and slid longitudinally in the bearing. The holder has an axial socket adapted to receive the carbon blank X, and a set-screw e serves to secure the blank in its position in the holder, in which case the axial line of 8o the blank, Fig. l, will be a distance from the face of the wheel B equal to the radius of the stem or finger oJ to be formed at the end of the blank.
After the blank has been secured in the holder the latter' is pushed longitudinally until its end is brought against the side of the wheel B, as shown in Fig. l, and the longitudinal movement is then continued and a rotary movement also imparted, so that the 9o cutting-pressure is mainly in the direction of the length of the blank, rather than radial, and there is less tendency to force the thin finger laterally from its connection with the block. Awater-reservoir J is provided with a spout 7.1;, extending over the wheel B, so as to constantly supply the wheel with water. After one finger is cut at one end of the blank An apparatus which we have found 65 the latter is reversed and the opposite end ift-e-l duced in like manner. Ve have found that by this means the blanks can be cut With certainty and dispatch and with but little liability of breaking, so that the manufacture of the electrodess rapidly and economically effected.
We do not limit ourselves to the use of the precise appliances shown and described, as it will be obvious that other means of presenting the blank to the Wheel and moving it may be employed, and that the blank may be revolved and fed laterally instead of longitudinally, although the latterI is much preferable.
We claim-- l. In the manufacture of electrodes for microphones, the method of which consists in presenting the end of a carbon cylinder to the side of a revolving Wet abrading-Wheel, with the axis of the carbon beyond the periphery of said Wheel, and revolving and feeding the blank longitudinally, substantially as de scribed.
2. In the manufacture of electrodes for microphones, the method of Which consists in revolving and feeding a cylinder of carbon longitudinally With part of its end against the side of a revolving abrading-Wheel, the axis of the cylinder being substantially parallel to the axis of 'the wheel and to one side of the periphery, substantially as and for the purpose described.
In testimony whereof We have signed our names to this specification in the presence of two subscribing Witnesses.
SAMUEL H. BARTLETT. HENRY E. WAITE. Vitnesses:
WM. H. WOODHULL, C. SPARMAN.
Publications (1)
Publication Number | Publication Date |
---|---|
US422174A true US422174A (en) | 1890-02-25 |
Family
ID=2491091
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US422174D Expired - Lifetime US422174A (en) | Ors to the waite |
Country Status (1)
Country | Link |
---|---|
US (1) | US422174A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2930307A (en) * | 1957-09-20 | 1960-03-29 | Matthew B Skomsvold | Photographic retouching device |
-
0
- US US422174D patent/US422174A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2930307A (en) * | 1957-09-20 | 1960-03-29 | Matthew B Skomsvold | Photographic retouching device |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US422174A (en) | Ors to the waite | |
US1491079A (en) | Device for and method of forming ceramic objects | |
US396553A (en) | Machinery for grinding metallic bands | |
US1252822A (en) | Machine for shaping and cutting out alimentary pastes. | |
US212315A (en) | Improvement in paper scoring and cutting machines | |
US654248A (en) | Paper-cutting machine. | |
US624882A (en) | Spoke-finishing machine | |
USRE13226E (en) | Machine | |
US877687A (en) | Cam. | |
US2199053A (en) | Means for dressing grinding wheels | |
US627236A (en) | Lathe attachment for cutting rubber or other rings | |
US983436A (en) | Machine for shaping blanks. | |
US1219440A (en) | Method of dressing piston-rings and apparatus therefor. | |
US1573616A (en) | Cigarette-making machine | |
US845410A (en) | Machine for cutting and dressing grindstones. | |
GB410174A (en) | Improvements in or relating to tobacco cutting machines | |
US228439A (en) | Cork-cutting machine | |
US36057A (en) | Improvement in rattan machinery | |
US224824A (en) | harris | |
US609075A (en) | And howard | |
US242993A (en) | phelps | |
US439819A (en) | Cylindrical surfaces | |
US505178A (en) | Grinding-machine | |
US260658A (en) | Art of making temple wires for | |
US1720769A (en) | Rotary cutter |