US3680692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Board transfer device
Assignee: US PLYWOOD Corp A CORP OF
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Filing: 1970-12-10
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Granted: 1972-08-01
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Expires: 1990-12-10
Abstract
Abstract A transfer device which lifts a board from a conveyor and moves it to one side for storage purposes. A sensing means is provided which controls the transfer means so that the board is engaged when it is midway over the transfering means. A photoelectric sensor measures the length of the board and a rejection means is provided for eliminating boards that are too large or too short.
Inventors
- 👤 Ronald W Southworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:14
CPC Classifications
G; G01; G01B; G01B11/00; G01B11/02; G01B11/04; G01B11/043; B; B07; B07C; B07C5/00; B07C5/04; B07C5/10; B65; B65G; B65G47/00; B65G47/52; B65G47/53
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
235 words
An article transfer device for moving articles from a conveyor to a position adjacent to the conveyor comprising: a. a conveyor means for moving articles in one direction; b. a first sensing means positioned along the conveyor to reveal the presence of the article at that position; c. a counting means for storing binary bits, controlled by the first sensing means to count in an additive manner at a first speed during the time the article is adjacent to the first sensing means; d. a second sensing means also positioned along the conveyor and spaced from the first sensing means to reveal the presence of the article at that position and to control the counting means to count in a subtractive manner at a second speed twice the first speed; e. a third sensing means for determining when the counter has reached its zero count condition, said means including a first ''''AND'''' gate circuit for generating a pulse only when the zero count is reached by the counting means; f. a second ''''AND'''' gate having one input line connected to the first ''''AND'''' gate circuit, a second input line connected to the second sensing means and an output line which produces a current only when the counter is zero and the secone sensing means produces no current; and g. a control means for activating the transverse transfer device when the gate circuit transmits a pulse.
Claim 2
Dependent Claim
235 words
An article transfer device for moving articles from a conveyor to a position adjacent to the conveyor comprising: a. a conveyor means for moving articles in one direction; b. a first sensing means positioned along the conveyor to reveal the presence of the article at that position; c. a counting means for storing binary bits, controlled by the first sensing means to count in an additive manner at a first speed during the time the article is adjacent to the first sensing means; d. a second sensing means also positioned along the conveyor and spaced from the first sensing means to reveal the presence of the article at that position and to control the counting means to count in a subtractive manner at a second speed twice the first speed; e. a third sensing means for determining when the counter has reached its zero count condition, said means including a first ''''AND'''' gate circuit for generating a pulse only when the zero count is reached by the counting means; f. a second ''''AND'''' gate having one input line connected to the first ''''AND'''' gate circuit, a second input line connected to the second sensing means and an output line which produces a current only when the counter is zero and the secone sensing means produces no current; and g. a control means for activating the transverse transfer device when the gate circuit transmits a pulse.
Claim 3
Dependent Claim
15 words
A transfer device as claimed in claim 1 wherein said conveyor is an endless belt.
Claim 4
Dependent Claim
66 words
A transfer device as claimed in claim 1 wherein said first and second sensing means each include a source of light on one side the conveyor and a plurality of photosensitive transducers on the other side of the conveyor. 4. A transfer device as claimed in claim 1 wherein said counting means is an electric counter including a plurality of bistable multivibrators for storing the count.
Claim 5
Dependent Claim
28 words
A transfer device as claimed in claim 4 wherein the first sensing means is coupled to a first source of electrical pulses which determines the first counting speed.
Claim 6
Dependent Claim
28 words
A transfer device as claimed in claim 4 wherein the second sensing means is coupled to a second source of electrical pulses which determines the second counting speed.
Claim 7
Dependent Claim
38 words
A transfer device as claimed in claim 1 wherein a bistable multivibrator is coupled to a source of alternating current for dividing the frequency by two and for providing the counting means with said first and second speeds.
Claim 8
Dependent Claim
71 words
A transfer device as claimed in claim 1 wherein a second counter is coupled between a source of pulses having a frequency corresponding to said first speeD and said first mentioned counting means, said second counter adapted to reduce the number of pulses applied to the first counting means when in its additive mode and thereby cause the first counting means to register zero in advance of the normal counting action.
Claim 9
Dependent Claim
66 words
A transfer device as claimed in claim 1 wherein a third counting means is coupled to the first counting means for obtaining a count responsive to the length of the article, said third counting means adapted to produce a signal which prevents activation of the transverse transfer device and permits the article to proceed along the conveyor when its length is less than a predetermined value.
Claim 10
Dependent Claim
30 words
A transfer device as claimed in claim 9 wherein the activation of the transverse transfer device is produced by a current pulse applied to a winding on a solenoid valve.
Claim 11
Dependent Claim
37 words
A transfer device as claimed in claim 1 wherein said transverse transfer device includes a plurality of endless belts moving at right angles to the conveyor means and normally positioned below the level of the conveyor means.
Claim 12
Dependent Claim
58 words
A transfer device as claimed in claim 11 wherein said transverse transfer device is moved to a position above the level of the conveyor means to lift the article and move it to a position to one side of the conveyor means, the motion of the transverse transfer device provided by a piston device operated by compressed gas.
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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) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |