US253345A - Self-closing elevator-door - Google Patents
Self-closing elevator-door Download PDFInfo
- Publication number
- US253345A US253345A US253345DA US253345A US 253345 A US253345 A US 253345A US 253345D A US253345D A US 253345DA US 253345 A US253345 A US 253345A
- Authority
- US
- United States
- Prior art keywords
- door
- latch
- self
- elevator
- spring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000005484 gravity Effects 0.000 description 4
- 230000000717 retained Effects 0.000 description 4
- 239000011449 brick Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000000875 corresponding Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 108010085990 projectin Proteins 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B13/00—Doors, gates, or other apparatus controlling access to, or exit from, cages or lift well landings
- B66B13/02—Door or gate operation
- B66B13/14—Control systems or devices
- B66B13/16—Door or gate locking devices controlled or primarily controlled by condition of cage, e.g. movement or position
- B66B13/18—Door or gate locking devices controlled or primarily controlled by condition of cage, e.g. movement or position without manually-operable devices for completing locking or unlocking of doors
- B66B13/20—Lock mechanisms actuated mechanically by abutments or projections on the cages
Definitions
- My invention relates to the doors of elevator-shafts, and has for its object to combine with self-closing doors automatically-acted devices for retaining each door open during the time the car or platform is stopped at such door.
- the invention consists in combining a pivoted latch-bar and 4a bow-spring on the doorframe with a door having a stud and an elevator-platform having-a lug, as hereinafter described.
- Figure l is a sectional elevation, showing one side ofa shaft with the door and elevatorplatform provided with the improved devices.
- Fig. 2 is a similar view, showing the latch in its normal position.
- Fig. 3 is a front elevation with the parts in the position of Fig. 1, and Fig. 4 shows the parts of the latch separately.
- A is one side wall of the shaft, constructed of either brick or wood, and provided with the usual door-opening.
- B is the door, supported upon or suspended from a track which is slightly inclined, so that the door shall close by gravity when not held open.
- C is the elevator-platform.
- a latchbar At one side of the door-opening is a latchbar, a, hung on a pivot, b, its inner end projectin'g into the shaft, and its outer end bent or formed, as shown most clearly in Fig. 4t, with a beveled ange, a', that extends between the wall and the door.
- the inner side of the wall is a plate or strip, c, of spring metal, attached rigidly by one end and engaging by a slot in its free end the inner end of latch nl.
- the spring c is retained in connection with the latch by an eye, d, and is of bow form, so that its middle portion extends into the shaft a sufcient distance for contact with a frictionroller, e, that is attached in a lug or projection of the platform O.
- a frictionroller e
- This device is simple and efficient. It allows the use of self-closing doors withoutv its being necessary for the elevator attendant to hold them open.
- Air eccentric may be substituted for the spring for lifting the latch
- platform O having a lug or projection for contact with the spring, substantially as and for the purposes set forth.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Elevator Door Apparatuses (AREA)
Description
(No Model.) I
T.. M..OLARK.
SELF CLOSING BLBVATOR DOOR. No. 253,345. Patented Feb. 7.1882.
Tg1 di f l f E o a7 J(- 'a y :70 a Z R\ V & 7 L
WITNBSSES: INVBNTOR:
d /W' I 'BY fa/WW ff, l ATTORNEYS.
ETERS. mom-mhplnpmr, wuhinglc. 0.6.
UNITED STATES PATENT OFFICE.
THEODORE M. CLARK, OF BOSTON, MASSACHUSETTS.
SELF-CLOSING ELEVATOR-DOOR.
SPECIFICATION forming part of Letters Patent No. 253,345, dated February 7, 1882,
Application filed November 1, 1881.
To all 'whom it may concern:
Be it known that I, TnEoDoRE M. CLARK, of Boston, Suffol k county-',Massa-chusetts, have invented a new and useful Improvement in Self-Closing Elevator-Doors, of which the following is a full, c lear, and exac't description.
My invention relates to the doors of elevator-shafts, and has for its object to combine with self-closing doors automatically-acted devices for retaining each door open during the time the car or platform is stopped at such door.
The invention consists in combining a pivoted latch-bar and 4a bow-spring on the doorframe with a door having a stud and an elevator-platform having-a lug, as hereinafter described. l
Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.
Figure l is a sectional elevation, showing one side ofa shaft with the door and elevatorplatform provided with the improved devices.v Fig. 2 is a similar view, showing the latch in its normal position. Fig. 3 is a front elevation with the parts in the position of Fig. 1, and Fig. 4 shows the parts of the latch separately.
A is one side wall of the shaft, constructed of either brick or wood, and provided with the usual door-opening.
B is the door, supported upon or suspended from a track which is slightly inclined, so that the door shall close by gravity when not held open.
C is the elevator-platform.
At one side of the door-opening is a latchbar, a, hung on a pivot, b, its inner end projectin'g into the shaft, and its outer end bent or formed, as shown most clearly in Fig. 4t, with a beveled ange, a', that extends between the wall and the door. 0n the inner side of the wall is a plate or strip, c, of spring metal, attached rigidly by one end and engaging by a slot in its free end the inner end of latch nl.
(Nomodel.)
The spring c is retained in connection with the latch by an eye, d, and is of bow form, so that its middle portion extends into the shaft a sufcient distance for contact with a frictionroller, e, that is attached in a lug or projection of the platform O. On the door is a pin or stud,f, in position for engaging the flange a' ot' the latch-bar when the latter is released.
The operation is as follows: In the normal position shown in Fig. 2 the latch-bar is retained upward by the spring c, and the door can be opened from the door side, as is often desired. The door is pulled back before the latch is thrown into locked position, so that when the platform reaches the floor the spring `is flattened by friction-roll e, the latch tilted,
and the stud f, located behind the latch end u', holds the door open.- On an up or down movement of the elevator the spring is released, thc latch tilted, and the door allowed to be closed by gravity.
This device is simple and efficient. It allows the use of self-closing doors withoutv its being necessary for the elevator attendant to hold them open.
It is evident that the details of construction can be somewhat diii'erent from those shown and described 'without departing from the spirit of my invention. Air eccentric may be substituted for the spring for lifting the latch,
varied as most convenient.
Having thus described my invention, I claim as new and desire to secure by Letters Patent- The pivotcd latch-bar a and bowed spring `575 and the location and shape of the latch-bar c, combined with door B, having stud j', and
platform O, having a lug or projection for contact with the spring, substantially as and for the purposes set forth.
ALFRED L. DAREow, EDGAR C. CURTIS.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US253345A true US253345A (en) | 1882-02-07 |
Family
ID=2322642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US253345D Expired - Lifetime US253345A (en) | Self-closing elevator-door |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US253345A (en) |
-
0
- US US253345D patent/US253345A/en not_active Expired - Lifetime
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