US3585949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for stopping a working element in a given position
Assignee: Individual
•
Filing: 1969-02-27
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Granted: 1971-06-22
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Expires: 1989-02-27
Abstract
Abstract A device for stopping a working element in a given position. For example, in the case of a sewing machine, the working element is a needle which should always be located in a given position displaced out of the work when the machine stops operating. The device includes a high-speed drive operatively connected with the working element to drive the latter at a relatively high speed during normal operation of the machine. In addition there is a low-speed drive connected with the working element to drive the latter at a relatively low speed, and the operator of the machine can switch over from the high-speed drive to the low-speed drive in preparation for stopping the operation of the machine. A blocking component coacts with the low-speed drive for blocking the transmission of power therefrom to the working element as soon as the latter reaches a given position so that the working element will remain in this latter position. Because the termination of the drive to the working element and the location thereof in the predetermined stopped position takes place only when driving through the low-speed drive, the stressing of the machine components is reduced and the smoothness of the entire stopping operation is enhanced.
Inventors
- 👤 Joseph Chudner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:12
CPC Classifications
D; D05; D05B; D05B69/00; D05B69/22; D05B69/26; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20528
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
279 words
In a machine which has a working element which is to be located in a given position when it does not operate, high-speed drive means for transmitting a relatively high-speed drive to the working element during normal operation of the machine, low-speed drive means for transmitting a drive of a lower speed to the working element only in preparation for stopping the operation thereof, means coacting with both of said drive means for switching over from said high-speed to said low-speed drive means preparatory to stopping the operation of said working element, each of said drive means having an operating and a nonoperating position, said low-speed drive means automatically assuming its operating position in response to changing of said high-speed drive means from its operating to its nonoperating position and said high-speed drive means automatically assuming its operating position in response to changing of said low-speed drive means from its operating to its nonoperating position, so that at any given moment one of said drive means is in its operating position, and blocking means coacting with said low-speed drive means for blocking, whenever said low-speed drive means assumes its operating position, the transmission of a drive from the latter to the working element when the working element has been located in said given position by said low-speed drive means, the latter drive means thus operating only during stopping of the working element to drive the latter at said lower speed until said blocking means blocks the transmission of the drive from said low-speed drive means to said working element, said high and low speed drive means both having a common input transmission component and a common output transmission component.
Claim 2
Dependent Claim
279 words
In a machine which has a working element which is to be located in a given position when it does not operate, high-speed drive means for transmitting a relatively high-speed drive to the working element during normal operation of the machine, low-speed drive means for transmitting a drive of a lower speed to the working element only in preparation for stopping the operation thereof, means coacting with both of said drive means for switching over from said high-speed to said low-speed drive means preparatory to stopping the operation of said working element, each of said drive means having an operating and a nonoperating position, said low-speed drive means automatically assuming its operating position in response to changing of said high-speed drive means from its operating to its nonoperating position and said high-speed drive means automatically assuming its operating position in response to changing of said low-speed drive means from its operating to its nonoperating position, so that at any given moment one of said drive means is in its operating position, and blocking means coacting with said low-speed drive means for blocking, whenever said low-speed drive means assumes its operating position, the transmission of a drive from the latter to the working element when the working element has been located in said given position by said low-speed drive means, the latter drive means thus operating only during stopping of the working element to drive the latter at said lower speed until said blocking means blocks the transmission of the drive from said low-speed drive means to said working element, said high and low speed drive means both having a common input transmission component and a common output transmission component.
Claim 3
Dependent Claim
38 words
The combination of claim 1 and wherein said high-speed drive means has a direct transmission between said common input and output transmission components and said low-speed drive means has a stepdown transmission between said input and output components.
Claim 4
Dependent Claim
65 words
The combination of claim 2 and wherein said stepdown transmission of said low-speed drive means includes a slip clutch and a driven element driven thereby, said blocking means being positioned in the path of movement of said driven element to stop the movement thereof when said working element reaches said given position and said slip clutch slipping when said driven element engages said blocking means.
Claim 5
Dependent Claim
22 words
The combination of claim 3 and wherein a high-speed slip clutch forms the direct transmission between the input and output transmission components.
Claim 6
Dependent Claim
41 words
The combination of claim 3 and wherein a means for switching from said low-speed to said high-speed drive means acts on said blocking means to displace the latter away from said driven element to release the drive to said working element.
Claim 7
Dependent Claim
36 words
The combination of claim 5 and wherein a catch means coacts with said blocking means for pReventing return of the latter to a position where it is located in the path movement of said driven element.
Claim 8
Dependent Claim
67 words
The combination of claim 6 and wherein a spring means urges said blocking means to said position in the path of movement of said driven element and the means for switching from said high-speed to said low-speed drive means coacting with said catch means to release the latter so as to release said blocking means to said spring means to be displaced thereby to said blocking position.
Claim 9
Dependent Claim
52 words
The combination of claim 1 and wherein a driving motor is operatively connected with said common input component for driving the latter, and operator-actuated means coacting with said driving motor for releasing the latter for operation both when operating through said high-speed drive means and when operating through said low-speed drive means.
Claim 10
Dependent Claim
95 words
The combination of claim 8 and wherein said working element is a needle of a sewing machine, said operator-actuated control means including a swing-lever having a neutral rest position when a drive is not transmitted from said driving motor to said common input component, a treadle, and a linkage means interconnecting said treadle with said swing lever for swinging the latter in the same direction when the treadle is turned in one direction to actuate the high-speed drive means and when said treadle is turned in an opposite direction to actuate the low-speed drive means.
Claim 11
Dependent Claim
57 words
The combination of claim 8 and wherein the means for switching between said high-speed and low-speed drive means includes an elongated switching component operatively connected with said treadle to move in one direction when said treadle is turned in one direction and to move in an opposite direction when said treadle is turned in the opposite direction.
Claim 12
Dependent Claim
73 words
The combination of claim 1 and wherein said working element is a sewing machine needle, an operating head assembly connected to the needle for operating the latter, said high- and low-speed drive means together with said blocking means forming part of a unit separate from said operating head, and transmission means transmitting the drive from said unit to said operating head so that said unit can be separately assembled with a sewing machine.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |