US4100868A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for limiting maximum number of stitches of sewing-machines
Assignee: Frankl and Kirchner GmbH and Co KG
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Filing: 1976-12-09
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Granted: 1978-07-18
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Expires: 1996-12-09
Abstract
Abstract A motor, a clutch and a brake part are provided to drive a sewing machine. Two potentiometers are connected in series with individual ones of two respective switches and in parallel across two leads of a control cable which is connected to a control box. The control box supplies power to the motor under the control of a pedal. One of the switches is a contact switch controlled by a knee switch one of whose surfaces, swivelable about an axis, rests against the actuating member of the contact switch. The other switch is a position switch, such as a toggle switch, and is carried by another surface of the knee switch.
Inventors
- 👤 Harry Reinecke
- 👤 Gerhard Bachmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:22
CPC Classifications
D; D05; D05B; D05B69/00; D05B69/14; D05B69/18
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
146 words
In an apparatus for limiting the maximum number of stiches of sewing machines having a motor, a clutch and brake part associated with the motor, control means for the clutch and brake, and regulating circuit means including a first and a second potentiometer and switch means in circuit to limit the maximum rotational speed of the drive, the improvement wherein said switch means includes a contact switch, a position switch and an independent knee switch having a first surface and a second surface, said first surface being swivelable about an axis; an actuating member connected to said contact switch, said actuating member being in contact with said first surface and said position switch being mounted on said second surface; and adjusting members coupled to respective ones of said two potentiometers for allowing adjustment thereof, said adjusting members being positioned on a surface of said knee switch.
Claim 2
Dependent Claim
146 words
In an apparatus for limiting the maximum number of stiches of sewing machines having a motor, a clutch and brake part associated with the motor, control means for the clutch and brake, and regulating circuit means including a first and a second potentiometer and switch means in circuit to limit the maximum rotational speed of the drive, the improvement wherein said switch means includes a contact switch, a position switch and an independent knee switch having a first surface and a second surface, said first surface being swivelable about an axis; an actuating member connected to said contact switch, said actuating member being in contact with said first surface and said position switch being mounted on said second surface; and adjusting members coupled to respective ones of said two potentiometers for allowing adjustment thereof, said adjusting members being positioned on a surface of said knee switch.
Claim 3
Dependent Claim
27 words
An apparatus according to claim 1, wherein said adjusting members of said first and second potentiometers are mounted on a surface which is opposite said first surface.
Claim 4
Dependent Claim
19 words
An apparatus according to claim 2 including a socket located on said surface which is opposite said first surface.
Claim 5
Dependent Claim
15 words
An apparatus according to claim 3, wherein said second surface is opposite said first surface.
Claim 6
Dependent Claim
15 words
An apparatus according to claim 2, wherein said second surface is opposite said first surface.
Claim 7
Dependent Claim
15 words
An apparatus according to claim 1, wherein said second surface is opposite said first surface.
Claim 8
Dependent Claim
13 words
Apparatus according to claim 1, including a socket located on said second surface.
Claim 9
Dependent Claim
15 words
An apparatus according to claim 7, wherein said second surface is opposite said first surface.
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) | 1981-07-17 | 1982-01-16 | 1982-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-17 | 1986-01-16 | 1986-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-17 | 1990-01-16 | 1990-07-18 | $7700.00 | Window Closed / Lapsed |