Patent US4188540A successfully refreshed from Google Patents.
US4188540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-ray apparatus comprising a weight compensation device
Assignee: US Philips Corp
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Filing: 1978-09-21
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Granted: 1980-02-12
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Expires: 1998-09-21
Abstract
Abstract An X-ray apparatus, comprising a weight compensation device which is suspended from the ceiling and which includes a carriage which is displaceable along the ceiling. A component is displaceable along a patient table is suspended from the carriage by means of a cable. A signal from a transducer is applied to an electric motor which drives the carriage compensate for the relative displacement between the carriage and the suspended component.
Inventors
- 👤 Friedrich Reiniger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:21
CPC Classifications
A; A61; A61B; A61B6/00; A61B6/44; A61B6/4429; A61B6/4464; G; G05; G05D; G05D3/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
108 words
In X-ray apparatus of the type which includes a carriage which is suspended from and displaceable along a ceiling; motor means which function to displace said carriage along said ceiling; a flexible connecting member having a first end attached to said carriage; and a displaceable component suspended from a second end of said flexible member, the improvement comprising: transducer means which generate an output signal which represents a relative horizontal displacement between the carriage and the displaceable component and control circuit means which receive the output signal from the transducer and operate the motor means to decrease said relative displacement whenever said relative displacement exceeds a reference value.
Claim 2
Dependent Claim
108 words
In X-ray apparatus of the type which includes a carriage which is suspended from and displaceable along a ceiling; motor means which function to displace said carriage along said ceiling; a flexible connecting member having a first end attached to said carriage; and a displaceable component suspended from a second end of said flexible member, the improvement comprising: transducer means which generate an output signal which represents a relative horizontal displacement between the carriage and the displaceable component and control circuit means which receive the output signal from the transducer and operate the motor means to decrease said relative displacement whenever said relative displacement exceeds a reference value.
Claim 3
Dependent Claim
59 words
The improvement claimed in claim 1 wherein the transducer means comprise: a position detector means connected to the carriage and a pivotable arm which couples the position detector to the flexible connecting member; and wherein said position detector means functions to supply a signal which is representative of the angle enclosed between the connecting member and a vertical line.
Claim 4
Dependent Claim
84 words
The improvement claimed in claim 2 wherein the position detector means comprise a first switch and a second switch; said pivotable arm being disposed to operate said first switch when rotated in a first direction and to operate said second switch when rotated in a second opposite direction; said first switch functioning, when operated, to supply said motor means from a first polarity power source and said second switch functioning, when operated, to supply said motor means from a second, opposite polarity power source.
Claim 5
Dependent Claim
68 words
The improvement claimed in claim 1 wherein the transducer means comprises: a stationary light source disposed on one side of the connecting member; two stationary optical-electrical converters disposed opposite the light source on an opposite side of the connecting member; and wherein the control circuit means comprise comparator means connected to receive signals from the optical-electrical converters and to supply power to the motor means in response thereto.
Claim 6
Dependent Claim
92 words
Apparatus of claim 1 wherein the transducer means comprise: a first potentiometer connected to produce a first output signal which is a measure of the position of the carriage with respect to a fixed frame of reference; a second potentiometer connected to produce a second output signal which is a measure of the position of the displaceable component with respect to said frame of reference; and the control circuit means comprise comparator means which receives signals from the potentiometers at its inputs and supplies power to the motor means in response thereto.
References Cited (Backward Citations)
US3916203A
Cited
US3933251A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-02-11 | 1983-08-13 | 1984-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-11 | 1987-08-13 | 1988-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-11 | 1991-08-13 | 1992-02-12 | $7700.00 | Window Closed / Lapsed |