US211937A - Improvement in expansion-pulleys - Google Patents
Improvement in expansion-pulleys Download PDFInfo
- Publication number
- US211937A US211937A US211937DA US211937A US 211937 A US211937 A US 211937A US 211937D A US211937D A US 211937DA US 211937 A US211937 A US 211937A
- Authority
- US
- United States
- Prior art keywords
- sections
- pulley
- springs
- pulleys
- disk
- 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
- 238000010276 construction Methods 0.000 description 2
- 230000000875 corresponding Effects 0.000 description 2
- 230000003292 diminished Effects 0.000 description 2
- 230000001105 regulatory Effects 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
- F16H55/52—Pulleys or friction discs of adjustable construction
- F16H55/54—Pulleys or friction discs of adjustable construction of which the bearing parts are radially adjustable
Definitions
- My invention relates to that class of pulleys or drums which are expansible and my improvements consist in a series of details of construction, as hereinafter more fully described and claimed.
- Figures 1 and 2 are views of my device.
- Fig. 3 is a section of the same.
- the pulley is formed in sections C, as many of these sections as may be considered necessary being used.
- Each section has attached to it a staple or lug, D, which projects through the slot b, so as to come through the disk B, as shown.
- springs E On the opposite side of the disk from that on whiclrthe sections are placed are secured springs E, corresponding in numher to the sections of the pulley, and to each lug on each section is fastened one of these springs.
- the pulley-sections are then each one attached to the disk by means of the lugs and springs; but the elongated slots admit of a certain amount of play to the lugs and sections outwardly from the center.
- the slots in the disk are cut so that when the springs draw the lugs to the point nearest the center, and the pulley-sections are in close contact with each other, a circular slot, (1, is left around the shaft, and between it and the pulley-sections, the inner ends of said sections being cut, as shown, so as to leave said slot.
- This pulley is adapted for use in any place where pulleys are ordinarily employed; but I have intended it more particularly for use in a clock for which I have applied for Letters Patent, and in that case it is used for regulatin g the speed of the hands by being enlarged or diminished at will, the endless cord operating said hands, and leading from the clockmovement passing around said pulley.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ropes Or Cables (AREA)
Description
SQ SERIGHELLI. Expansion Pulley.
No. 211,937. Patentd' Feb. 4. 1879-.
Witnesses I- vfior -N PEIERS, PHOTO-UTHDGRAPMER. WASHINGTON o c UNITED STATES PATENT OFFICE.
SILVESTRO SERIGHELLI, OF SAN FRANCISCO, CALIFORNIA.
IMPROVEMENT IN EXPANSlON-PULLEYS.
Specification forming part of Letters Patent No. 211,937, dated February 4 1879; application filed November 22, 1878.
To all whom it may concern:
Be it known that I, SILvEsTRo SERIGHELLI, of the city and county of San Francisco, and State of California, have invented an ExpansionPulley; and I hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawings.
My invention relates to that class of pulleys or drums which are expansible and my improvements consist in a series of details of construction, as hereinafter more fully described and claimed.
Figures 1 and 2 are views of my device. Fig. 3 is a section of the same.
Let A represent the shafting in which my expansible pulley is mounted. On this shaft is keyed the metallic disk B, having slots 1) formed in it, as shown.
The pulley is formed in sections C, as many of these sections as may be considered necessary being used. Each section has attached to it a staple or lug, D, which projects through the slot b, so as to come through the disk B, as shown. On the opposite side of the disk from that on whiclrthe sections are placed are secured springs E, corresponding in numher to the sections of the pulley, and to each lug on each section is fastened one of these springs. The pulley-sections are then each one attached to the disk by means of the lugs and springs; but the elongated slots admit of a certain amount of play to the lugs and sections outwardly from the center.
The slots in the disk are cut so that when the springs draw the lugs to the point nearest the center, and the pulley-sections are in close contact with each other, a circular slot, (1, is left around the shaft, and between it and the pulley-sections, the inner ends of said sections being cut, as shown, so as to leave said slot.
On the shaft on which the pulley is mounted areformedscrew-threads, onto whichisscrewed a cone, F, and when said cone is screwed up so as to enter the slot d it pushes the sections apart and increases the diameter of the pulley. This action brings a tension on the springs, which hold the sections to the disk by means of the lugs, and when the cone is screwed back the springs draw the sections together again and decrease the diameter of the pulley. A nut-lock, G, on the shaft holds the cone in position firmly.
By this means I furnish an expansible pulley, which is quickly and easily regulated. There is never at any time any direct pressure on the springs, since when at the least diameter the sections meet each other, and bring no strain on the springs. When fully expanded the pressure is taken by the cone, the springs merely holding the sections to the disk by means of the lugs.
This pulley is adapted for use in any place where pulleys are ordinarily employed; but I have intended it more particularly for use in a clock for which I have applied for Letters Patent, and in that case it is used for regulatin g the speed of the hands by being enlarged or diminished at will, the endless cord operating said hands, and leading from the clockmovement passing around said pulley.
Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is
In an expanding pulley, the combination of the disk B, slotted radially, the wedgesliaped sections C, provided with lugs D, projecting through the slots in plate or disk 13, springs E, arranged on 'the face of plate B, shaft A, cone F, and nut G, all constructed, arranged, and operated as set forth.
In witness whereof I have hereunto set my hand;
SILVESIRO SERIGHELLI.
Witnesses:
OHAs. G. YALE, FRANK A. BRooKs.
Publications (1)
Publication Number | Publication Date |
---|---|
US211937A true US211937A (en) | 1879-02-04 |
Family
ID=2281344
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US211937D Expired - Lifetime US211937A (en) | Improvement in expansion-pulleys |
Country Status (1)
Country | Link |
---|---|
US (1) | US211937A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2800332A (en) * | 1954-04-21 | 1957-07-23 | Charles P Peirce | Expanding mandrel for recording belt |
US3087349A (en) * | 1960-11-28 | 1963-04-30 | Gale B Herting | Hydraulic adjustable peripheral hub and wheel combination |
US4487518A (en) * | 1981-05-07 | 1984-12-11 | Honeywell Information Systems Italia | Adjustable printer head drive |
-
0
- US US211937D patent/US211937A/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2800332A (en) * | 1954-04-21 | 1957-07-23 | Charles P Peirce | Expanding mandrel for recording belt |
US3087349A (en) * | 1960-11-28 | 1963-04-30 | Gale B Herting | Hydraulic adjustable peripheral hub and wheel combination |
US4487518A (en) * | 1981-05-07 | 1984-12-11 | Honeywell Information Systems Italia | Adjustable printer head drive |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US211937A (en) | Improvement in expansion-pulleys | |
US680063A (en) | Belt-placer. | |
US444081A (en) | Balance-wheel | |
US360393A (en) | Timothy rogers | |
US1212023A (en) | Hopple. | |
US756363A (en) | Speed-governor. | |
US855237A (en) | Belt-tightening idler. | |
US786306A (en) | Slip-gear. | |
US1065438A (en) | Stirrup. | |
US838358A (en) | Shroud member for blades. | |
US1258088A (en) | Machine-belt buckle. | |
US113210A (en) | Improvement in treadles | |
US409427A (en) | Milton | |
US779910A (en) | Elastic-fluid turbine. | |
US118855A (en) | Improvement in toy-hoops | |
US472598A (en) | Gaerick m | |
US811352A (en) | Self-governing clutch. | |
US739583A (en) | Pawl-and-ratchet connection. | |
US38749A (en) | Improvement in friction-brakes | |
US846321A (en) | Combined trousers-button and drawers-supporter. | |
US317586A (en) | Governor for animal-powers | |
US219558A (en) | Improvement in governors for horse-powers | |
US176150A (en) | fowler stoddard | |
US403857A (en) | reeves | |
US1217258A (en) | Expanding friction-clutch. |