US4364453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety installation for elevators
Assignee: Individual
•
Filing: 1980-11-26
•
Granted: 1982-12-21
•
Expires: 2000-11-26
Abstract
Abstract The installation comprises a switch 121 inserted between an electric source 117 and the motor 105 of a winch 104, a switch which is of the two-part type of which one 121a is solid with a moving contact 108 and the other 121b with a car 103. The electric elements of the installation such as motor 105, electromagnets 118 and 119 and a motor 114 of a drum 110 for connecting cables 116 are fed directly by a line 200 from electric source 117 while a line 300 runs to part 121b of switch 121, the other part 121b receiving lines corresponding to feeding other poles of said electric elements 105, 118, 119, 114. When the current is interrupted, electromagnets 118-119 are deexcited and springs 149-150 thrust levers 141-142. Car 103, thus uncoupled from moving contact 108, descends by its own weight, unwinding connecting cables 116. A centrifugal brake 112 assures a reasonable and constant speed until car 103 reaches the stop. Even if the current is reestablished while the car is descending by itself, motor 105 cannot be started since switch 121 is open.
Inventors
- 👤 Antoine Serina
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:22
CPC Classifications
B; B66; B66B; B66B5/00; B66B5/02; B66B5/027
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
322 words
Elevator safety installation of the type comprising a moving contact (108) fastened to the lower ends of carrying cables (107) wound on an electric winch (105) and a car (103) mobile along stationary guides (100-101) located under the moving contact (108) and connected to it, on the one hand, by means of direct mechanical coupling organs (141-144) which are mounted mobile between an active position in which they make the car (103) rigidly solid with the moving contact (108) and a retracted position in which they are inactive and, on the other hand, by means of a connecting cable (116) wound on a rotary drum (110) placed on the car (103), which is suspended from moving contact (108) by said cable (116) when the coupling organs (141-144) are in retracted position, characterized in that it is provided with means for automatic decoupling of the moving contact (108) and car (103), means comprising an electric circuit which is connected to the same source (117) as that supplying the circuit of winch (105) and which comprises, on the one hand, at least an electromagnet (118-119) associated with the coupling organs (141-144) and mounted so that it has to keep said organs (141-144) in active position as long as it is excited by the electric current flowing normally, while it has to release them as soon as the current is no longer supplied and therefore the current no longer flows and, on the other hand, a switch (121) inserted between the source (117) and the winch (105) and mounted so that it automatically stops in closed position as long as the coupling organs (141-144) are in active position and it is automatically placed in open position as soon as said organs (141-144) are in retracted position, these coupling organs (141-144) being associated with mechanical means (149-150) opposing the electromagnet (118-119) but with less force and which constantly pull these organs (141-144) toward their retracted position.
Claim 2
Dependent Claim
322 words
Elevator safety installation of the type comprising a moving contact (108) fastened to the lower ends of carrying cables (107) wound on an electric winch (105) and a car (103) mobile along stationary guides (100-101) located under the moving contact (108) and connected to it, on the one hand, by means of direct mechanical coupling organs (141-144) which are mounted mobile between an active position in which they make the car (103) rigidly solid with the moving contact (108) and a retracted position in which they are inactive and, on the other hand, by means of a connecting cable (116) wound on a rotary drum (110) placed on the car (103), which is suspended from moving contact (108) by said cable (116) when the coupling organs (141-144) are in retracted position, characterized in that it is provided with means for automatic decoupling of the moving contact (108) and car (103), means comprising an electric circuit which is connected to the same source (117) as that supplying the circuit of winch (105) and which comprises, on the one hand, at least an electromagnet (118-119) associated with the coupling organs (141-144) and mounted so that it has to keep said organs (141-144) in active position as long as it is excited by the electric current flowing normally, while it has to release them as soon as the current is no longer supplied and therefore the current no longer flows and, on the other hand, a switch (121) inserted between the source (117) and the winch (105) and mounted so that it automatically stops in closed position as long as the coupling organs (141-144) are in active position and it is automatically placed in open position as soon as said organs (141-144) are in retracted position, these coupling organs (141-144) being associated with mechanical means (149-150) opposing the electromagnet (118-119) but with less force and which constantly pull these organs (141-144) toward their retracted position.
Claim 3
Dependent Claim
69 words
Installation according to claim 1 wherein the switch (121) inserted between the source (117) and the motor (105) of the winch (104) is of the two-part type of which one (121a) is solid with the moving contact (108) and the other (121b) with the car (103), the switch (121) being closed when the parts (121a and 121b) work together and open when the parts (121a and 121b) are separated.
Claim 4
Dependent Claim
39 words
Installation according to claim 1, wherein it comprises means (306-304-307-308-309) to control the descent of the moving contact (108) for it to become solid with the car (103) after the breakdown has been repaired or electric power supply reestablished.
Claim 5
Dependent Claim
50 words
Installation according to claim 3, wherein it comprises an electric motor (114) to control rewinding of the connecting cable (116) on the drum (110) during descent of the moving contact (108) to become solid with the car (103) after the breakdown has been repaired or the electric power supply reestablished.
Claim 6
Dependent Claim
95 words
Installation according to claim 4, wherein it comprises an electric circuit (309) feeding the winch (105) when the car (103) and the moving contact (108) are uncoupled, a switch (308) to close simultaneously the circuit of the electric motor (114) for rewinding the connecting cable (116) on the drum (110) and the electric circuit of the winch (105), but only in the direction of descent of the moving contact (108) and a limit switch (304) to open the circuit of the switch (308) when the moving contact (108) and the car (103) have been recoupled.
Claim 7
Dependent Claim
144 words
Installation according to claim 5, wherein one of the poles of the source (117) is connected directly lines (220, 201, 202 and 203) to one of the poles of the motor (105) of the winch (104), to one of the poles of the electromagnet, respectively of each electromagnet (118-119) and to one of the poles of the optional motor (114) connected to the drum (110) and wherein the other pole of the source (117) is connected by a line (300) to one of the parts (121a) of the switch (121) while the other part (121b) of said switch (121) is connected by a line (301) to the other pole of the electromagnet, respectively of each electromagnet (118-119) and by a line (302) to a relay box (122) whose output is connected by a line (305) to the other pole (105) of the winch (104).
Claim 8
Dependent Claim
173 words
Installation according to claim 6, wherein the relay box (122) comprises two contactors (303 and 304) subjected to an organ (120-123-124) sensitive to the effective flow of current so that the first contactor (303) is closed when the current flows, while the second contactor (304) is open and vice versa the first contactor (303) is open and the second (304) closed when the current is interrupted, the first contactor (303) being placed after the switch (121) which is inserted between the source (117) and the motor (105) of the winch (104) and before said motor (105) while the second contactor (304) is placed between the line (300) connecting the source (117) to one of the parts (121a) of the switch (121) and to a first pole of a reset contactor, preferably push button (308), whose second pole is connected by a line (309) to a circuit of the motor (105) of the winch (104) designed to cause rotation of this latter in only the direction corresponding to unwinding of the carrying cables (107).
Claim 9
Dependent Claim
158 words
Installation according to claim 7, wherein the drum (110) placed on the roof (109) of the car (103) and which receives at least a connecting cable (116) is associated with an electric motor (114) whose one pole is connected directly by a line (203) to one of the poles of the source (117) and whose other pole is connected by a line (310) to the line (309) that extends from the second pole of the reset contactor to the circuit of the motor (105) of the winch (104) designed to cause rotation of this latter in the direction corresponding to unwinding of the carrying cables (107), said motor (114) associated with the drum (110) having a supply circuit designed to cause rotation of the drum (110) in the direction corresponding to winding of the connecting cable or cables (116), the motor (105) of the winch (104) and the motor (114) of the drum (110) being, in addition, synchronized.
Claim 10
Dependent Claim
47 words
Installation according to claim 1, wherein it comprises means to block the car (103) in case of breakdown or cutoff of electric power to the motor (105) of the winch (104), opposite the landing located directly below the site of the accidental stopping of the car (103).
Claim 11
Dependent Claim
71 words
Installation according to claim 9, wherein the means to block the car (103) in case of breakdown or cutoff of electric power to the motor (105) of the winch (104) opposite the landing located directly below the site of the accidental stopping of the car (103) comprise stops (160) provided along the guides (100-101) and electromagnetic bolts (163-164) carried by the car (103) and intended to work with said stops (160).
Claim 12
Dependent Claim
104 words
Installation according to claim 10, wherein it comprises an electric switch (121) to open the circuit supplying the winch (105) and to open the circuit supplying the electromagnetic bolts (163-164) when the car (103) and moving contact (108) are uncoupled, so that they remain in active position as long as the moving contact (108) and the car (103) are uncoupled, a second electric circuit (306-304-307-308-309) to control the winch (105) solely in the direction of descent of the moving contact (108) and a limit switch (304) to open the second electric circuit when the moving contact (108) and the car (103) have been recoupled.
Claim 13
Dependent Claim
72 words
Installation according to claim 11, wherein one of the poles of each electromagnetic bolt (163 and 164) is connected directly by lines (200 and 203) to one of the poles of the source (117) while the other pole of each electromagnet (163 and 164) is connected to the other pole of the source (117) by a line (302) connected to the part (121b) of the switch (121) solid with the car (103).
Claim 14
Dependent Claim
50 words
Installation according to claim 12, wherein the part (121b) of the switch (121) which receives the line (302) connected to the other pole of the electromagnetic bolts (163 and 164) also receives a line (301) connected to the other pole of the electromagnetic, respectively of each electromagnet (118 and 119).
Claim 15
Dependent Claim
62 words
Installation according to claim 1, wherein the moving contact (108) comprises a central part (136, 130-131, 137-138) which is provided with lateral arms (151 and 152) whose ends (153 and 154) work with stationary guides (100 and 101) and which preferably are adjustable in length to be fitted to the various spacings of the guides (100 and 101) depending on preexisting installations.
Claim 16
Dependent Claim
73 words
Installation according to claim 14, wherein the central part (136, 130-131, 137-138) of the moving contact (108) is provided with vertical guides (130 and 131) with which counterparts (132 and 133) solid with the car (103) are supposed to work so that the relative position of said moving contact (108) and of the car (103) is suitable determined laterally when the guides (130 and 131) and their counterparts (132 and 133) work together.
Claim 17
Dependent Claim
32 words
Installation according to claim 1, wherein the mechanical means opposing the electromagnet, respectively each electromagnet (118-119), consist of the weight of the car (103) itself which acts in the direction of uncoupling.
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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) | 1985-12-20 | 1986-06-21 | 1986-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-20 | 1990-06-21 | 1990-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-20 | 1994-06-21 | 1994-12-21 | $7700.00 | Window Closed / Lapsed |