US1776619A - Silent gears, etc., and method of manufacture - Google Patents
Silent gears, etc., and method of manufacture Download PDFInfo
- Publication number
- US1776619A US1776619A US221301A US22130127A US1776619A US 1776619 A US1776619 A US 1776619A US 221301 A US221301 A US 221301A US 22130127 A US22130127 A US 22130127A US 1776619 A US1776619 A US 1776619A
- Authority
- US
- United States
- Prior art keywords
- gear
- blank
- disks
- groups
- metallic
- 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
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/06—Use of materials; Use of treatments of toothed members or worms to affect their intrinsic material properties
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- 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
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
- Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
- Y10T156/1043—Subsequent to assembly
- Y10T156/1044—Subsequent to assembly of parallel stacked sheets only
-
- 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
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49462—Gear making
- Y10T29/49467—Gear shaping
-
- 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
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49462—Gear making
- Y10T29/49467—Gear shaping
- Y10T29/4948—Gear shaping with specific gear material
-
- 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
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12229—Intermediate article [e.g., blank, etc.]
- Y10T428/12236—Panel having nonrectangular perimeter
- Y10T428/12243—Disk
-
- 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
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12444—Embodying fibers interengaged or between layers [e.g., paper, etc.]
-
- 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
- Y10T74/00—Machine element or mechanism
- Y10T74/19—Gearing
- Y10T74/1987—Rotary bodies
- Y10T74/19893—Sectional
- Y10T74/19916—Multiple disks
Definitions
- This invention relates particularly to gearwheels of the silent gear type having non-metallic teeth.
- gears are, at-the present time, manufactured from various non-metallic-substances.
- a highly satisfactory laminated'product for the'purpose is composed of cloth, or canvas, impregnated with a varnish of bakelite, redmanol, or other phenolic Condensation product, the massbeing compacted and hardened under heat and pressure. 4
- One of the main diflicu lties with the use of a laminated produ'ctof the character men- Th1s is particularly true, when the gear is forced onto the shaft under heavy pressure,
- Fig. 2 designates a fabric disk impregnated with a solution of a ph'enolic condensation: product, such as bakelite,
- FIG. 3 A designates a similar disk, but having a perforation A large 'gear; and Fig. 6, a broken base view of a finished gear-blank, shown partly provided enough in diameter to admit a metallic washer.
- B designates a metallic washer having a perforation B of about the to be mounted and having an external diameter corresponding with the diameter of the perforation A
- the metallic disk B is cut used in connection with the fabric disksshown in Fig. 1.
- the disks A and A are assembled in groups.
- the groups are bracketedsize. of a shaft upon which the gear-blank is and the number of disks ineach group is apv plied tothe corresponding bracket.
- each containing three of the disks A Each ofthese four groups of three blanks receives or houses one of the metallic washers B in the.
- a suitable pressure is about two thousand pounds per square inch, and a suitable temperature is about 175 C.
- the article preferably is maintained under heat and pressure until the phenolic condensation product has been converted to the final infusible and substantially insoluble condition.
- the hot-pressing operation will require from ten to forty-five minutes, depending upon the size of the gearblank, the temperature employed, etc.
- the dies may be of suitable shape to produce the form of gear-blank indicated in Fig. 5. After the blank has been produced, the teeth may be cut, as in the case of an ordinary metal gear.
- the finished gear-blank may have a bore represented by the diameters of the perforations A and B; or, if desired, the bore of the press-blank may be trimmed by means of a boring tool, although ordinarily this is unnecessary.
- the process 'of producing a gear-blank which comprises: placing in a mold an asproduct, and metallic washers, some of the fabric disks having larger perforations than the others and serving to house said washers; and consolidating the assembly under heat and pressure.
- An article of the character set forth consisting of interspersed groups of fabric disks impregnated with a phenolic condensation product, said groups having bores of different diameters and metallic washers housed in some of the larger bores, all of said groups being consolidated under heat and pressure into an integral body within which said metallic washers are embedded, the inner circumferences of said metallic washers forming a part of the bore of the consolidated body.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- Gears, Cams (AREA)
Description
Sept. 23, 1930'. s. H. CLARK 1,776,619
v v SILENT GEARS ETC., AND METHOD OF MANUFACTURE Filed Sept. 22. 1927 Patented Sept. 23.1930
; UNITED. STA ES PATENT OFFICE enonenn. cmmx, or cmcr nna'rr, 01110, ASSIGNOR To 'IHE ronmrca msuLA'rrom COMPANY, OF CINCINNATI, OHIO, A CORPORATION OF OHIO srmnr cases, are, AND mn'rnon or ms'nurac'runn I Application filed September 22, 1927. Serial No. 221,301.
This invention relates particularly to gearwheels of the silent gear type having non-metallic teeth. Such gears are, at-the present time, manufactured from various non-metallic-substances. A highly satisfactory laminated'product for the'purpose is composed of cloth, or canvas, impregnated with a varnish of bakelite, redmanol, or other phenolic Condensation product, the massbeing compacted and hardened under heat and pressure. 4 One of the main diflicu lties with the use of a laminated produ'ctof the character men- Th1s is particularly true, when the gear is forced onto the shaft under heavy pressure,
which may unintentionally exceed the'elastic limit. In such a case, the material will cold- Attemptsvhave been made to overcome the difliculty mentioned by molding within the laminated disk a complete metal bushing, but
this adds considerably to the cost of the gear-j blank, and requires machining. I
In accordance wifll the present invention,
' disks of bakelite-impregnated fabric are perforated and assembled in a special manner and have associated therewith stamped metal rings which are so I'GIBtQdfitOthB stack of fabric disks that' a gear-blank may beformed in an economical "manner in a heated hydraulic press, such gear-blank having embedded in its hub-portion'the metalli'c disks so firmly anchored to the non-metallic body as to provide a reliable-connection between the gear-blank and a shaft when a press-fit is tioned for gear-blanks, or gears, is'the tendency of the disk to become loose on the shaft.
I flow and the gear will loosen from the shaftn F ig.3, a perspective view of a fabric disk having a perforation of a size adapted to ad- .mlta metallic washer; Fig. 4, a perspective View of one of the metallic washers employed; Fig. 5, a sectional View of afinished with teeth. v I
Referring to Fig. 2,'A designates a fabric disk impregnated with a solution of a ph'enolic condensation: product, such as bakelite,
mounted. Referring to Fig. 3, A designates a similar disk, but having a perforation A large 'gear; and Fig. 6, a broken base view of a finished gear-blank, shown partly provided enough in diameter to admit a metallic washer.
Referring to Fig. 4, B designates a metallic washer having a perforation B of about the to be mounted and having an external diameter corresponding with the diameter of the perforation A The metallic disk B is cut used in connection with the fabric disksshown in Fig. 1.
' In the diagrammatic view shown in Fig. 1,'
the disks A and A are assembled in groups.
For convenience, the groups are bracketedsize. of a shaft upon which the gear-blank is and the number of disks ineach group is apv plied tothe corresponding bracket.
The disks shown in Fig. 1 are arranged in the same relation in which they enter into I the finished gear shown in Fig. 5, the finished gearbeing I designated 0. Thus, reading from right to left on Fig. 1, there are six of the blanks A; then six of the blanks A then one of the blanks A; then three of the blanks A The further arrangement will beunderstood from'the diagram itself.
It will be noted that there are four groups,
each containing three of the disks A Each ofthese four groups of three blanks receives or houses one of the metallic washers B in the.
assembly of the pack for insertion into the heat and pressure, such as is ordinarily employed for producing laminated phenolic condensation products. A suitable pressure is about two thousand pounds per square inch, and a suitable temperature is about 175 C. The article preferably is maintained under heat and pressure until the phenolic condensation product has been converted to the final infusible and substantially insoluble condition. Ordinarily, the hot-pressing operation will require from ten to forty-five minutes, depending upon the size of the gearblank, the temperature employed, etc.
The dies may be of suitable shape to produce the form of gear-blank indicated in Fig. 5. After the blank has been produced, the teeth may be cut, as in the case of an ordinary metal gear.
It will be noted that the use of the fabric disks arranged in the manner shown at the right-hand portion of Fig. 1 enables the dies to form therecess C at one side of the gearblank. ,Also, the dies, when this particular arrangement is employed, effect a certain amount of dishing of the washers B, and this tends to strengthen the bond between the metal washers and non-metallic body of the gear-blank.
It has been found in practice that metallic washers may in this manner be introduced into a gear-blank in such manner as to be come virtually integral with the gear-blank; and when agear-blank thus constructed is pressed onto a. shaft under pressure of several tons, the gear-blank becomes so firmly fixed upon the shaft that there is no liability of its working loose. The gear-blank is shown provided with a central perforation sembly' comprising annular disks of fabric impregnated with aphenolic condensation C to receive the shaft. This preparation may represent the bore of the gear-blank after it has been forced onto a shaft. That is, the finished gear-blank may have a bore represented by the diameters of the perforations A and B; or, if desired, the bore of the press-blank may be trimmed by means of a boring tool, although ordinarily this is unnecessary.
The foregoing detailed description has been given for clearness of understanding only, and no unnecessary limitations should be understood therefrom.
, lVhat I regard as new, and desire to secure by Letters Patent, is:
1. The process 'of producing a gear-blank which comprises: placing in a mold an asproduct, and metallic washers, some of the fabric disks having larger perforations than the others and serving to house said washers; and consolidating the assembly under heat and pressure.
2. The process of producing a gear-blank which comprises: assembling groups of fabric disks having bores of relatively small diameter and interspersed groups of fabric disks having bores of relatively large diameter and metallic washers within some of the larger bores; and consolidating the assembly under heat and pressure.
3. The process of forming a: gear-blank which comprises: assembling alternating groups of disks impregnated with a binder, said groups having bores of different diameters and metallic washers housed in some of the larger bores, the outer groups at the ends of the assembly having small bores; and molding the assembly under heat and pressure.
4. The method of forming an article of th character described which comprises: as sembling groups of fabric disks, impregnated with a phenolic condensation product, said groups having bores of different diameters and being arranged in alternation, and introducing metallic washers within the bores of intermediate groups vof large diameter, the assembly providing an end group of disks having bores of small diameter and an adjacent group of disks having bores of large diameter; and subjecting the assembly to heat and pressure in a mold adapted to dish the body of the article at one side.
5. An article of the character set forth consisting of interspersed groups of fabric disks impregnated with a phenolic condensation product, said groups having bores of different diameters and metallic washers housed in some of the larger bores, all of said groups being consolidated under heat and pressure into an integral body within which said metallic washers are embedded, the inner circumferences of said metallic washers forming a part of the bore of the consolidated body.
'- GEORGE H. CLARK.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US221301A US1776619A (en) | 1927-09-22 | 1927-09-22 | Silent gears, etc., and method of manufacture |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US221301A US1776619A (en) | 1927-09-22 | 1927-09-22 | Silent gears, etc., and method of manufacture |
Publications (1)
Publication Number | Publication Date |
---|---|
US1776619A true US1776619A (en) | 1930-09-23 |
Family
ID=22827232
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US221301A Expired - Lifetime US1776619A (en) | 1927-09-22 | 1927-09-22 | Silent gears, etc., and method of manufacture |
Country Status (1)
Country | Link |
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US (1) | US1776619A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3385679A (en) * | 1965-10-11 | 1968-05-28 | Schlumberger Technology Corp | Blank for forming an expansible ring member |
-
1927
- 1927-09-22 US US221301A patent/US1776619A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3385679A (en) * | 1965-10-11 | 1968-05-28 | Schlumberger Technology Corp | Blank for forming an expansible ring member |
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