Patent US3779170A successfully refreshed from Google Patents.
US3779170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control for the lateral adjustment of a track working tool assembly
Assignee: Franz Plasser Bahnbaumaschinen Industrie GmbH
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Filing: 1971-12-30
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Granted: 1973-12-18
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Expires: 1991-12-30
Abstract
Abstract The lateral adjustment of a track tamping unit is controlled by a sensor associated with the unit and arranged to sense the lateral position of the track in respect of the unit as the tamper moves on the track rails. The sensor produces electrical control signals corresponding to the sensed track deviations, and an adjustable control device for the track tamping unit drive is electrically connected to the sensor and receives the control signals. The signals adjust the control device for moving the track tamping unit laterally in response to the control signals.
Inventors
- 👤 F Plasser
- 👤 J Theurer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:49
CPC Classifications
E; E01; E01B; E01B27/00; E01B27/12; E01B27/13; E01B27/16
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
168 words
An apparatus for controlling the lateral adjustment of a track working tool assembly mounted on the frame of a track working machine for lateral movement transversely of the track relative to the frame, the machine frame being mounted for mobility on the track rails, and a drive being provided for laterally moving the track tool assembly for said adjustment, the control apparatus comprising 1. a sensor associated with the track working tool assembly and arranged to sense the lateral position of the track in respect of the track working tool assembly as the machine frame moves on the track rails, a. the sensor including means for producing electrical control signals corresponding to the sensed lateral track position, and 2. an adjustable control device for the track tool assembly moving drive electrically connected to the sensor and continuously receiving the control signals, a. the control signals adjusting the control device in response to the control signals for moving the track working tool assembly laterally responsively to the control signals.
Claim 2
Independent Claim
168 words
An apparatus for controlling the lateral adjustment of a track working tool assembly mounted on the frame of a track working machine for lateral movement transversely of the track relative to the frame, the machine frame being mounted for mobility on the track rails, and a drive being provided for laterally moving the track tool assembly for said adjustment, the control apparatus comprising 1. a sensor associated with the track working tool assembly and arranged to sense the lateral position of the track in respect of the track working tool assembly as the machine frame moves on the track rails, a. the sensor including means for producing electrical control signals corresponding to the sensed lateral track position, and 2. an adjustable control device for the track tool assembly moving drive electrically connected to the sensor and continuously receiving the control signals, a. the control signals adjusting the control device in response to the control signals for moving the track working tool assembly laterally responsively to the control signals.
Claim 3
Dependent Claim
16 words
The apparatus of claim 1, wherein the track working tool assembly is a track tamping unit.
Claim 4
Dependent Claim
49 words
an adjustable control device for the track tool assembly moving drive electrically connected to the sensor and continuously receiving the control signals, a. the control signals adjusting the control device in response to the control signals for moving the track working tool assembly laterally responsively to the control signals.
Claim 5
Dependent Claim
49 words
an adjustable control device for the track tool assembly moving drive electrically connected to the sensor and continuously receiving the control signals, a. the control signals adjusting the control device in response to the control signals for moving the track working tool assembly laterally responsively to the control signals.
Claim 6
Dependent Claim
29 words
The apparatus of claim 2, wherein each of the track rails has one of the track tamping units associated therewith, and the drive is arranged to move both assemblies.
Claim 7
Dependent Claim
34 words
The apparatus of claim 2, wherein each of the track rails has one of the track tamping units associated therewith, and a separate one of the drives is provided for each of the assemblies.
Claim 8
Dependent Claim
20 words
The apparatus of claim 1, wherein the track working tool assembly is pivotal for lateral movement transversely of the track.
Claim 9
Dependent Claim
61 words
The apparatus of claim 1, wherein the sensor is constituted by an induction switch arranged laterally adjacent, but spaced from, the head of at least one of the track rails at respective sides of the rail, each of the induction switches having a contact inductively operable by a variation in the lateral distance between the switch and the adjacent rail head.
Claim 10
Dependent Claim
49 words
The apparatus of claim 6, wherein the track comprises rail fastening elements spaced along the track elongation, and the induction switch has another contact inductively operated by the spaced rail fastening elements for moving the machine frame on the track in response to the operation of the other contact.
Claim 11
Dependent Claim
62 words
The apparatus of claim 6, wherein the sensor comprises a further induction switch arranged laterally adjacent, but outwardly spaced from, each of the first-named induction switches, and means for switching off the further induction switches when the first-named switches are electrically connected to the drive and for electrically connecting the further switches to the drive when the first-named switches are switched off.
Claim 12
Dependent Claim
101 words
The apparatus of claim 1, wherein the drive comprises a double-acting hydraulic motor operable by a hydraulic fluid circuit, the hydraulic circuit including a source of hydraulic fluid, a fluid supply line leading from the fluid source to one chamber of the hydraulic motor, a fluid return line leading from the other chamber of the hydraulic motor to the fluid source, and a constant-speed fluid pump in the fluid supply line, and the adjustable control device comprises a solenoid Valve in the hydraulic circuit, the solenoid valve having a coil electrically connected to the sensor and actuated by the control signals.
Claim 13
Dependent Claim
23 words
The apparatus of claim 9, further comprising an amplifier connected between the sensor and the solenoid valve coil for amplifying the control signals.
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) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |