US687295A - Belt-tightener. - Google Patents
Belt-tightener. Download PDFInfo
- Publication number
- US687295A US687295A US6529601A US1901065296A US687295A US 687295 A US687295 A US 687295A US 6529601 A US6529601 A US 6529601A US 1901065296 A US1901065296 A US 1901065296A US 687295 A US687295 A US 687295A
- Authority
- US
- United States
- Prior art keywords
- belt
- tightener
- roller
- arm
- pulley
- 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
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H7/10—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley
- F16H7/12—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley
- F16H7/1254—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley without vibration damping means
- F16H7/1281—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley without vibration damping means where the axis of the pulley moves along a substantially circular path
Definitions
- This invention has reference to means for automatically tightening a driving-belt, and is particularly applicable to the driving-belt of a sewing-machine operating at high speed.
- a belt is employed in such machines to drive the hook or looper shaft from the main shaft, an ordinary belt-tightener will not operate in a satisfactory manner.
- the tightening-pulley has acted to take up the slack in the belt, a jerk or irregularity in running will sometimes throw the pulley back and slacken the belt again.
- this difficulty is overcome by combining with the tightening roller or pulley, which acts automatically, means, such as a pawl and detent, for preventing motion of the pulley in a direction which would slacken the belt.
- Figure 1 is an end view
- Fig. 2 a side view, of the belt-tightener
- Figs. 3 and 4 are similar views showing another form of belt-tightener.
- the drawings illustrate the invention as applied to the driving mechanism of a sewingmachine.
- the main shaft 21 carries the driving-pulley 23, from which the hook-shaft 22, carrying pulley 25, is driven through belt 24.
- the tightening-roller 43 is carried at one end of a swinging arm or frame 42, which carries at its other end a rack 40.
- Thisrack-is' engaged by a spring-pawl attached at one end of an arm 49, the other end of which is secured bya set-screw to a sleeve or-bushing 44, which surrounds shaft 22 andis fastened by a set-screw in lug 45, depending from the bed-plate of the machine.
- Arm 42, carrying the tighteningroller is pivoted to arm 49 by a headed pin 51, and surrounding this pin is a spring 47, which presses the arm 42 in such direction as to cause roller 43 to take up slack in belt 24.
- the engagement of rack 40 by spring-pawl 41 prevents movement of arm 42 in the opposite direction.
- the arm or frame 42 carrying the tighteningroller, is loosely mounted on sleeve 44, and said arm or frame has a weight 48, which serves the purpose of spring 47 in the other construction.
- Back 40 is in this case attached to sleeve 44.
- the combination with the driving and driven pulleys and connecting-belt, of the belt-tightener comprising a swinging frame carrying a tightening-roller; means for causing said roller to take up automatically the slack in said belt, and a pawl and detent for preventing movement of the roller away from the belt.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Basic Packing Technique (AREA)
Description
No. 687,295. Patented Nov. 26,190l. S. BURTON.
BELT TIGHTENER. (Application filed June 20, 1901.)
(No Model.)
UNITED STATES PATENT OFFICE.
STOCKTON BORTON, OF PROVIDENCE, RHODE ISLAND.
BELT-TIGHTENER.
SPECIFICATION formingpart of Letters Patent No. 687,295, dated November 26, 1901.
Application filed June 20,1901. Serial No. 65,296. (No model.)
To all whom it may concern.-
Be it known that I, STOCKTON BORTON, a resident of Providence, Rhode Island, have invented a new and useful Improvement; in Belt-Tighteners, which invention is fully set forth in the following specification. v
This invention has reference to means for automatically tightening a driving-belt, and is particularly applicable to the driving-belt of a sewing-machine operating at high speed. Where a belt is employed in such machines to drive the hook or looper shaft from the main shaft, an ordinary belt-tightener will not operate in a satisfactory manner. When the tightening-pulley has acted to take up the slack in the belt, a jerk or irregularity in running will sometimes throw the pulley back and slacken the belt again.- According to the present invention this difficulty is overcome by combining with the tightening roller or pulley, which acts automatically, means, such as a pawl and detent, for preventing motion of the pulley in a direction which would slacken the belt.
In the accompanying drawings, which form part of this specification, Figure 1 is an end view, and Fig. 2 a side view, of the belt-tightener. Figs. 3 and 4 are similar views showing another form of belt-tightener.
The drawings illustrate the invention as applied to the driving mechanism of a sewingmachine. The main shaft 21 carries the driving-pulley 23, from which the hook-shaft 22, carrying pulley 25, is driven through belt 24.
In the construction shown in Figs. 1* and 2 the tightening-roller 43 is carried at one end of a swinging arm or frame 42, which carries at its other end a rack 40. Thisrack-is' engaged by a spring-pawl attached at one end of an arm 49, the other end of which is secured bya set-screw to a sleeve or-bushing 44, which surrounds shaft 22 andis fastened by a set-screw in lug 45, depending from the bed-plate of the machine. Arm 42, carrying the tighteningroller, is pivoted to arm 49 by a headed pin 51, and surrounding this pin is a spring 47, which presses the arm 42 in such direction as to cause roller 43 to take up slack in belt 24. The engagement of rack 40 by spring-pawl 41 prevents movement of arm 42 in the opposite direction.
In the construction shown in Figs. 3 and 4 the arm or frame 42, carrying the tighteningroller, is loosely mounted on sleeve 44, and said arm or frame has a weight 48, which serves the purpose of spring 47 in the other construction. Back 40 is in this case attached to sleeve 44.
The construction shown in Figs. 1 and 2 has certain advantages over that of Figs. 3
and 4. The bearing on which arm 42 swings is almost directly opposite the belt and pulley, avoiding the clamping action which occurs when the bearing is to one side of the belt and pulley. The spring-power is applied opposite the belt, which is advantageous, and the construction requires less room between the under side of .the bed-plate and the pan which is usually attached beneath the machine.
I claim-- 1. The combination with the driving and driven pulleys and the connecting-belt, of the belt-tightener comprising a movable frame, a tightening-roller carried thereby, means for causing said roller to take up automatically the slack in said belt, and means for preventing movement of said roller in the oppositedirection. 7
2. The combination with the driving and driven pulleys and the connecting-belt, of the belt-tightener comprising a swinging frame, a tightening-roller carried thereby, means for causing said roller to take up automatically the slack in said belt, and means for preventing movement of said roller in the opposite direction. I
3. The combination with the driving and driven pulleys and connecting-belt, of the belt-tightener comprising a swinging frame carrying a tightening-roller; means for causing said roller to take up automatically the slack in said belt, and a pawl and detent for preventing movement of the roller away from the belt.
In testimony whereof I have signed this specification in the presence of two subscribing witnesses.
STOCKTON HORTON. Witnesses:
JOHN B. SEDGWIOK, RALPH H. CHAPMAN.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US6529601A US687295A (en) | 1901-06-20 | 1901-06-20 | Belt-tightener. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US6529601A US687295A (en) | 1901-06-20 | 1901-06-20 | Belt-tightener. |
Publications (1)
Publication Number | Publication Date |
---|---|
US687295A true US687295A (en) | 1901-11-26 |
Family
ID=2755839
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US6529601A Expired - Lifetime US687295A (en) | 1901-06-20 | 1901-06-20 | Belt-tightener. |
Country Status (1)
Country | Link |
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US (1) | US687295A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2719435A (en) * | 1952-06-30 | 1955-10-04 | Arvo A Rinta | Rope tensioner |
US3052465A (en) * | 1956-12-31 | 1962-09-04 | Ibm | Sheet separating apparatus |
-
1901
- 1901-06-20 US US6529601A patent/US687295A/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2719435A (en) * | 1952-06-30 | 1955-10-04 | Arvo A Rinta | Rope tensioner |
US3052465A (en) * | 1956-12-31 | 1962-09-04 | Ibm | Sheet separating apparatus |
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