US3585941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Checking device for single and double cable cableways with automatic clamping
Assignee: CERETTI AND TANFANI
•
Filing: 1969-10-08
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Granted: 1971-06-22
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Expires: 1989-10-08
Abstract
Abstract In cableways in which each car is frequently coupled and decoupled from the traction cable by means of an automatic locking clamp arranged on the principal trolley, a device, independent of the coupling device arranged on the car trolley, for checking the grip of the car coupling clamp on the traction cable.
Inventors
- 👤 Maurizio Primo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:22
CPC Classifications
B; B61; B61B; B61B12/00; B61B12/12; B61B12/122
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
200 words
A device for checking the grip of the car coupling clamp of the traction cable in single and double cableways with automatic clamping which comprises: a checking carriage which moves on wheels along a path of its own which is rigid with a guardrail of the path of the clamp trolley; a motor which causes said carriage to advance autonomously with a velocity slightly less than that of the clamp trolley in order to permit the latter to reach the carriage without appreciable impact and to drag it beyond; a braking means acting with a preestablished torque value on the carriage; and finally a tracer carried by the carriage and maintained in contact with the traction cable which senses possible relative sliding between the cable and clamp trolley in the case of defective grip of the clamp, and in such a case to operate a signal device and switch for stopping the operation of the cableway; the rail for the carriage being provided with a terminal ascending ramp for causing detachment of the carriage from the clamp trolley after checking and the cessation of braking torque in order to allow the carriage to return by inertia to its initial position.
Claim 2
Independent Claim
200 words
A device for checking the grip of the car coupling clamp of the traction cable in single and double cableways with automatic clamping which comprises: a checking carriage which moves on wheels along a path of its own which is rigid with a guardrail of the path of the clamp trolley; a motor which causes said carriage to advance autonomously with a velocity slightly less than that of the clamp trolley in order to permit the latter to reach the carriage without appreciable impact and to drag it beyond; a braking means acting with a preestablished torque value on the carriage; and finally a tracer carried by the carriage and maintained in contact with the traction cable which senses possible relative sliding between the cable and clamp trolley in the case of defective grip of the clamp, and in such a case to operate a signal device and switch for stopping the operation of the cableway; the rail for the carriage being provided with a terminal ascending ramp for causing detachment of the carriage from the clamp trolley after checking and the cessation of braking torque in order to allow the carriage to return by inertia to its initial position.
Claim 3
Dependent Claim
71 words
A device as claimed in claim 1, in which the test carriage is inserted between the ends of a cable looped around two pulleys situated at the ends of the path of travel of the carriage; one of the said pulleys being driven by a reversible electric motor, in order that it can provide both the torque for driving the carriage and, on reversing, the braking torque acting on the carriage.
Claim 4
Dependent Claim
107 words
A device as claimed in claim 1, in which said electric motor is operated by way of remote switches arranged along the path of travel, a first contact being actuated by the clamp trolley for starting the motor for driving the carriage; a second contact being actuated by the carriage successive to the moment of impact between the clamp trolley and carriage; and a third contact being actuated at the end of the test path of the carriage, when this latter disengages itself from the clamp trolley, in order to remove current from the motor and allow the free return of the carriage to its final position.
Claim 5
Dependent Claim
138 words
A device as claimed in claim 1, in which the carriage comprises two frames one inner and one outer, the former sliding with respect to the latter, connected by means of springs which thrust in the longitudinal sense, the outer frame being anchored at its two ends to the ends of the cable loop, the inner frame being provided with two elastic rollers against which the clamp trolley rests and thrusts, and being further provided with a tracer member operated by a lever mechanism actuated by the clamp trolley for lowering on the traction cable; said tracer being interlocked with a device for signalling and interrupting the flow of electric current to the installation, and acting only in the case in which sliding occurs between the clamp trolley and traction cable under the action of the braking torque.
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) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |