US425734A - Half to charles j - Google Patents
Half to charles j Download PDFInfo
- Publication number
- US425734A US425734A US425734DA US425734A US 425734 A US425734 A US 425734A US 425734D A US425734D A US 425734DA US 425734 A US425734 A US 425734A
- Authority
- US
- United States
- Prior art keywords
- rim
- sheave
- segments
- complete
- wearing
- 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
- 239000002965 rope Substances 0.000 description 12
- 238000010276 construction Methods 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 241000239290 Araneae Species 0.000 description 2
- 241000219495 Betulaceae Species 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 206010022114 Injury Diseases 0.000 description 2
- 210000003491 Skin Anatomy 0.000 description 2
- 235000018185 birch Nutrition 0.000 description 2
- 235000018212 birch Nutrition 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
Images
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
- F16H55/32—Friction members
- F16H55/36—Pulleys
- F16H55/50—Features essential to rope pulleys
Definitions
- My invention relates to the class of sheaves or pulleys; and it consists in the novel improved construction thereof, hereinafter fully described, and specifically pointed out in the claims.
- the object of my invention is to provide a sheave having a separc ble or detachable easily-renewable wearing-surface, whereby the body of the sheave may be preserved indefinitely.
- my improved sheave may be used in any place or connection, it is especially of value in the construction and maintenance of cable roads, being adapted for use in the tension-carriage, at all places where a change of direction of the rope is had, at the terminus 2 5 of the road where the rope returns, and wherever there is particular strain and wear of the cable.
- the sheaves always wear out on their rims, and'they then have to be entirely renewed-a difficult and expensive proceedingand in the operation of cable roads a delay is caused,'the'effect of which is to tie up the entire road.
- My invention avoids this necessity, and also gives other advantages, which will be presently pointed 3 5 out.
- Figure 1 is a side elevation of one-half of my sheave.
- Fig. 2 is a cross-section of the rim and separable or detachable segments thereof, the latter being shown as slightly removed from the rim for better illustration.
- the sheaveA is formed of the usual hub a, arms a, and complete grooved rim B. On 5 each side of the rim is formed a flange b. C
- segments are separable or detachable independent segments. These are formed with a base adapted to be fitted properly in thegroove of rim B, a groove 0 in their face, and side flanges c, which fit on the flanges b of the rim. These segments may be of any desired length, and they are suflicient in number to extend around the entire periphery of the rim B and form the wearing-surface of the sheave. They are secured to the rim by means of bolts D, passing through the side flanges Z) and c, the heads of said bolts being countersunk, in order to avoid any projecting points or portions which might catch the clothes of a person working at or about the sheave.
- the sheave is of cast-iron.
- the segments being small pieces, comparatively, are made of very close iron, and are consequently harder than the sheaverim.
- a very important advantage of this construction lies in the provision of such a thick wearing-surface as is shown. Such thickness would not too be practicable in the rim itself, for in casting it the shrinkage would be so unequal as to tively small segments may be cast smooth in their grooves, thereby preserving the skin and adding to their wearing qualities.
- An improved sheave formed with a complete rim and laterally-projecting side flanges,- and separable or detachable grooved and flanged segments secured to the face of said rim on each side, and forming a renewable wearing-surface for the sheave, substantially as herein described.
- An improved sheave formed with a complete rim having a groove in its face and laterally-projecting side flanges, and separable or detachable segments fitted in the groove of the rim and forming a renewable wearing-surface for the sheave, said segments having a thick wearing-surface at their bases, substantially as herein described.
Description
(No Model.)
W. H. BIRCH.
SHBAVE.
No. 425,734. Patented Apr. 15. 1890.
V UNITED STATES PATENT OFFICE.
IVILLIAM H. BIRCH, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR OF ONE- I'IALF TO CHARLES J. KAIGHIN, OF SAME PLACE.
SH EAVE.
SPECIFICATION forming part of Letters Patent No. 425,734, dated April 15, 1890. Application filed December 20, 1889. Serial No. 334,427. (No model.)
To aZZ whom it'may concern:
Be it known that I, VVILLIAM l-I. BIRCH, a citizen of the United States, residing in the city and county of SanFrancisco, State of California, have invented an Improvement in Sheaves; and I hereby declare the following to be a full, clear, and exact description of the same. I
My invention relates to the class of sheaves or pulleys; and it consists in the novel improved construction thereof, hereinafter fully described, and specifically pointed out in the claims.
The object of my invention is to provide a sheave having a separc ble or detachable easily-renewable wearing-surface, whereby the body of the sheave may be preserved indefinitely.
Though my improved sheave may be used in any place or connection, it is especially of value in the construction and maintenance of cable roads, being adapted for use in the tension-carriage, at all places where a change of direction of the rope is had, at the terminus 2 5 of the road where the rope returns, and wherever there is particular strain and wear of the cable. In these and similar places the sheaves always wear out on their rims, and'they then have to be entirely renewed-a difficult and expensive proceedingand in the operation of cable roads a delay is caused,'the'effect of which is to tie up the entire road. My invention avoids this necessity, and also gives other advantages, which will be presently pointed 3 5 out.
Referring to the accompanying drawings for a more complete explanation of my invention, Figure 1 is a side elevation of one-half of my sheave. Fig. 2 is a cross-section of the rim and separable or detachable segments thereof, the latter being shown as slightly removed from the rim for better illustration.
The sheaveA is formed of the usual hub a, arms a, and complete grooved rim B. On 5 each side of the rim is formed a flange b. C
are separable or detachable independent segments. These are formed with a base adapted to be fitted properly in thegroove of rim B, a groove 0 in their face, and side flanges c, which fit on the flanges b of the rim. These segments may be of any desired length, and they are suflicient in number to extend around the entire periphery of the rim B and form the wearing-surface of the sheave. They are secured to the rim by means of bolts D, passing through the side flanges Z) and c, the heads of said bolts being countersunk, in order to avoid any projecting points or portions which might catch the clothes of a person working at or about the sheave.
It will be readily seen from the foregoing that an improved sheave of this kind will obviate the main disadvantages heretofore mentioned. It can be used continuously until the segments wear down, and even then, if the sheave cannot be immediately attended to, no injury will result for an appreciable time, for the reason that the rim B itself will serve for the rope. This feature of having a complete and operative rim, which can and will come into action when the segments are worn down, is of prime importance in cable roads, for these sheaves are generally located in obscure places and situations difficult of access.
\Vith my sheave the necessity of immediate 7 5 attention is not present, for the rim B will. serve for the rope after the segments are worn down. Again, when using the ordinary sheave, the tendency of the rope is to cut off one of the walls or sides of the grooved face of the rim, and to drop down onto the hub or other parts of the structure and be thereby injured. IVith my sheave this does not occur. When the segments are worn,they canbe easily removed and others substituted,thus making the body of the sheave last indefinitely.
The particular construction of the rim with its side flanges and that of the segments with their side flanges are to be noticed as furnishing practical means of uniting them, leaving the groove of the segments clear of all boltheads, whereby it can wear uniformly and not injure the rope.
In practice the sheave is of cast-iron. The segments being small pieces, comparatively, are made of very close iron, and are consequently harder than the sheaverim. A very important advantage of this construction lies in the provision of such a thick wearing-surface as is shown. Such thickness would not too be practicable in the rim itself, for in casting it the shrinkage would be so unequal as to tively small segments may be cast smooth in their grooves, thereby preserving the skin and adding to their wearing qualities.
I am aware of that improvement in the manufact-nre of pulleys which contemplates the use of a separable spider and rim; but this is not like my invention, for I propose to use a complete sheave composed of hub, arms, and rim, which gives me the advantage of the rim strength and endurance, and to this complete device I apply my wearing-segments.
Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is
1. An improved sheave formed with a complete rim and laterally-projecting side flanges,- and separable or detachable grooved and flanged segments secured to the face of said rim on each side, and forming a renewable wearing-surface for the sheave, substantially as herein described.
2. An improved sheave formed with a complete rim having a groove in its face and laterally-projecting side flanges, and separable or detachable segments fitted in the groove of the rim and forming a renewable wearing-surface for the sheave, said segments having a thick wearing-surface at their bases, substantially as herein described.
An improved sheave formed with a complete rim havinga grooved face and separable substantially as herein describe 5. An improved sheave formed with a complete rim with a grooved face and a flange on each side, separable or detachable segments,
each provided with a deeply-grooved face fitted in the grooved face of the rim and forming a renewable wearing-surface for the sheave, saidsegments having side flanges fitting on the flanges of the rim, and bolts securing said flanges together, and having their headscoum tersunk in the flanges of the segments, substantially as herein described.
In Witness whereof I have hereunto set my hand.
WVILLIAM H. BIRCH.
Witnesses:
' S. H. NOURSE,
I-I.'C. LEE.
Publications (1)
Publication Number | Publication Date |
---|---|
US425734A true US425734A (en) | 1890-04-15 |
Family
ID=2494647
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US425734D Expired - Lifetime US425734A (en) | Half to charles j |
Country Status (1)
Country | Link |
---|---|
US (1) | US425734A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2850125A (en) * | 1956-06-18 | 1958-09-02 | Jersey Prod Res Co | Fluid-cooled braking device |
US2925739A (en) * | 1957-01-15 | 1960-02-23 | Livermore Corp H F | Harness sheaves |
US3707883A (en) * | 1971-10-02 | 1973-01-02 | Goodrich Co B F | Power transmission pulley and means for changing the diameter of same |
USRE30039E (en) * | 1974-09-19 | 1979-06-26 | Caterpillar Tractor Co. | Segmented and cushioned idler for track-type vehicles |
US4571225A (en) * | 1984-10-31 | 1986-02-18 | Modern Machine Works Inc. | Sheave assembly |
US20100141026A1 (en) * | 2008-12-10 | 2010-06-10 | Caterpillar Inc. | Isolated center tread rim idler |
CN104736899A (en) * | 2012-10-22 | 2015-06-24 | 株式会社Ihi | Sheave |
-
0
- US US425734D patent/US425734A/en not_active Expired - Lifetime
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2850125A (en) * | 1956-06-18 | 1958-09-02 | Jersey Prod Res Co | Fluid-cooled braking device |
US2925739A (en) * | 1957-01-15 | 1960-02-23 | Livermore Corp H F | Harness sheaves |
US3707883A (en) * | 1971-10-02 | 1973-01-02 | Goodrich Co B F | Power transmission pulley and means for changing the diameter of same |
USRE30039E (en) * | 1974-09-19 | 1979-06-26 | Caterpillar Tractor Co. | Segmented and cushioned idler for track-type vehicles |
US4571225A (en) * | 1984-10-31 | 1986-02-18 | Modern Machine Works Inc. | Sheave assembly |
US20100141026A1 (en) * | 2008-12-10 | 2010-06-10 | Caterpillar Inc. | Isolated center tread rim idler |
US7905559B2 (en) | 2008-12-10 | 2011-03-15 | Caterpillar Inc | Isolated center tread rim idler wheel |
CN104736899A (en) * | 2012-10-22 | 2015-06-24 | 株式会社Ihi | Sheave |
CN104736899B (en) * | 2012-10-22 | 2019-09-03 | 株式会社相浦机械 | Sheave |
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