US3633197A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loom operation indicator circuit
Assignee: Greenwood Mills Inc
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Filing: 1968-04-26
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Granted: 1972-01-04
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Expires: 1988-04-26
Abstract
Abstract Determination of whether a textile machine, specifically a loom, is operating or not, is accomplished by the apparatus disclosed herein by means of sensing machine motion. A switch, either SPST, SPDT, or DPST, is mounted on the rocker shaft of the loom or other oscillating part of the loom essential to cloth production for oscillation therewith and is connected to remote RC circuitry which biases a transistor to an on state only while the switch is oscillating. A central computer senses the condition of the transistor for each of the looms so equipped in a mill, to produce information for management.
Inventors
- 👤 Frederick A Dunlap
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:22
CPC Classifications
D; D01; D01H; D01H13/00; D01H13/32; D03; D03J; D03J1/00; D03J2700/00; D03J2700/04
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
285 words
Apparatus for use with a textile machine of the type which Has a part that moves in a given manner only during operation of said machine, comprising: switch means having first and second electrical states and adapted to oscillate between said first and second states only while said part moves in said given manner, thereby sensing operation of said machine, electric circuit means connected to said switch means for exhibiting a first only when said switch means is oscillating between said states as aforesaid to indicate operation of said machine and for exhibiting a second output signal during the absence of oscillation of said switch means, regardless of its electrical state then, to indicate nonoperation of said machine comprising RC means including connected first and second RC circuits the first of which includes a first capacitor connected to said switch means for alternate charge and discharge, respectively, during said first and second electrical states and the second of which is connected to said switching device input and wherein said electric circuit means includes a DC source connected to said first RC circuit by said switch means for causing the said alternate charge and discharge of said first capacitor to develop in said second RC circuit a charge sufficient to maintain said switching device in an on condition only during oscillation of said switching means, and a bilevel switching device having off and on conditions for producing said first and second output signals and having an input connected to said RC means for operation of said switching device in one of said conditions only while said switch means is oscillating as aforesaid and in the other of said conditions while said switch means does not oscillate.
Claim 2
Dependent Claim
285 words
Apparatus for use with a textile machine of the type which Has a part that moves in a given manner only during operation of said machine, comprising: switch means having first and second electrical states and adapted to oscillate between said first and second states only while said part moves in said given manner, thereby sensing operation of said machine, electric circuit means connected to said switch means for exhibiting a first only when said switch means is oscillating between said states as aforesaid to indicate operation of said machine and for exhibiting a second output signal during the absence of oscillation of said switch means, regardless of its electrical state then, to indicate nonoperation of said machine comprising RC means including connected first and second RC circuits the first of which includes a first capacitor connected to said switch means for alternate charge and discharge, respectively, during said first and second electrical states and the second of which is connected to said switching device input and wherein said electric circuit means includes a DC source connected to said first RC circuit by said switch means for causing the said alternate charge and discharge of said first capacitor to develop in said second RC circuit a charge sufficient to maintain said switching device in an on condition only during oscillation of said switching means, and a bilevel switching device having off and on conditions for producing said first and second output signals and having an input connected to said RC means for operation of said switching device in one of said conditions only while said switch means is oscillating as aforesaid and in the other of said conditions while said switch means does not oscillate.
Claim 3
Dependent Claim
14 words
Apparatus as in claim 1 wherein said switch means includes a three terminal switch.
Claim 4
Dependent Claim
78 words
Apparatus as in claim 1 wherein said switch means is a mercury switch having a housing containing electrical contacts in at least one of the opposite ends of the housing and a ball of mercury which moves during a part of each oscillation to one of said ends to connect the contacts there and establish said first state and moves during another part of each oscillation to the other end of said housing to establish said second state.
Claim 5
Dependent Claim
34 words
A textile machine in combination with the apparatus of claim 1 and comprising a loom having as said moving part a rocker shaft on which said switch means is mounted for oscillation as aforesaid.
Claim 6
Dependent Claim
150 words
Apparatus for use with a textile machine of the type which has a part that moves in a given manner only during operation of said machine, comprising: switch means having first and second electrical states and adapted to oscillate between said first and second states only while said part moves in said given manner, thereby sensing operation of said machine, and, electric circuit means connected to said switch means for exhibiting a first output signal only when said switch means is oscillating between said states as aforesaid to indicate operation of said machine and for exhibiting a second output signal during the absence of oscillation of said switch means, regardless of its electrical state then, to indicate nonoperation of said machine, including a first capacitor and a first resistor connected in parallel, said capacitor having a charge only when said switch is oscillating between said first and second electrical states.
Claim 7
Dependent Claim
150 words
Apparatus for use with a textile machine of the type which has a part that moves in a given manner only during operation of said machine, comprising: switch means having first and second electrical states and adapted to oscillate between said first and second states only while said part moves in said given manner, thereby sensing operation of said machine, and, electric circuit means connected to said switch means for exhibiting a first output signal only when said switch means is oscillating between said states as aforesaid to indicate operation of said machine and for exhibiting a second output signal during the absence of oscillation of said switch means, regardless of its electrical state then, to indicate nonoperation of said machine, including a first capacitor and a first resistor connected in parallel, said capacitor having a charge only when said switch is oscillating between said first and second electrical states.
Claim 8
Dependent Claim
28 words
A system as in claim 5 wherein said circuit means includes a transistor and wherein said first capacitor is connected between the base and emitter of said transistor.
Claim 9
Dependent Claim
41 words
A system as in claim 6 wherein said switch means includes three contacts and is in said first state when a first contact connects a second contact and is in said second state when said first contact connects a third contact.
Claim 10
Dependent Claim
73 words
A system as in claim 7 wherein said circuit means includes a second capacitor connected between said emitter of said transistor and said first contact, and a source of direct current, so that said source is connected across sAid second capacitor when said switch connects said first contact and said second contact, and said second capacitor is connected across said first capacitor when said switch connects said first contact and said third contact.
Claim 11
Dependent Claim
96 words
Apparatus for indicating motion in a textile machine of the type which has a part that moves only during operation of said machine, comprising: a source of direct current voltage, a first capacitor, a second capacitor and a resistor connected in parallel, and switch means adapted to be mounted on said machine part so as to cause said first capacitor to be alternately charged by said source and discharged through said second capacitor and said resistor when said part is moving, so that said second capacitor remains charged only as long as said part is moving.
Claim 12
Dependent Claim
96 words
Apparatus for indicating motion in a textile machine of the type which has a part that moves only during operation of said machine, comprising: a source of direct current voltage, a first capacitor, a second capacitor and a resistor connected in parallel, and switch means adapted to be mounted on said machine part so as to cause said first capacitor to be alternately charged by said source and discharged through said second capacitor and said resistor when said part is moving, so that said second capacitor remains charged only as long as said part is moving.
Claim 13
Dependent Claim
31 words
A system as in claim 9 including a transistor having a base and emitter between which said second capacitor is connected for providing an output indicating whether said part is moving.
Claim 14
Dependent Claim
226 words
Apparatus for indicating motion in a textile machine of the type which has a part that moves only during operation of said machine, comprising: switch means having a plurality of contacts and adapted to be mounted on said machine part to alternately connect a first contact of said plurality of contacts to one and then another of two other contacts of said plurality of contacts, a first resistor, a source of direct current electrical potential having one polarity linked to said one of two other contacts via said first resistor a first capacitor connected between said first contact and the other polarity of said source, a second resistor connected at one end to said another contact, a second capacitor connected between the end of said second resistor opposite said one end and said other polarity of said source so that when said switch is alternately connecting said contacts said second capacitor retains a charge, a third resistor connected in parallel with said second capacitor, a fourth resistor having one end connected to said end opposite said one end of said second resistor, and a transistor having its base connected to the end opposite said one end of said fourth resistor and its emitter to said other polarity of said source, so that said transistor is conductive when said second capacitor has at least a given charge.
Claim 15
Dependent Claim
226 words
Apparatus for indicating motion in a textile machine of the type which has a part that moves only during operation of said machine, comprising: switch means having a plurality of contacts and adapted to be mounted on said machine part to alternately connect a first contact of said plurality of contacts to one and then another of two other contacts of said plurality of contacts, a first resistor, a source of direct current electrical potential having one polarity linked to said one of two other contacts via said first resistor a first capacitor connected between said first contact and the other polarity of said source, a second resistor connected at one end to said another contact, a second capacitor connected between the end of said second resistor opposite said one end and said other polarity of said source so that when said switch is alternately connecting said contacts said second capacitor retains a charge, a third resistor connected in parallel with said second capacitor, a fourth resistor having one end connected to said end opposite said one end of said second resistor, and a transistor having its base connected to the end opposite said one end of said fourth resistor and its emitter to said other polarity of said source, so that said transistor is conductive when said second capacitor has at least a given charge.
Claim 16
Dependent Claim
38 words
A textile machine in combination with said apparatus of claim 11 and comprising a loom having as said moving part a rocker shaft on which said switch means is mounted to oscillate therewith and effect said alternate connections.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |