US1033181A - Automatic stopping mechanism for elevators. - Google Patents

Description

T. LARSSON. AUTOMATIC STOPPING MECHANISM FOR ELEVATORS. APBLIGATION TILED APR. 3, 1905, RENEWED MAY-27, 1912.

1,033, 181. Patented July 23, 1912.

is SHEEN-SHEET 1.

T. LARSSON. I AUTOMATIC STOPPING MECHANISM FOR ELEVATORS. APPLICATION FILED APR. 3, 1905. RENEWED MAY 27, 1912.

1,033, 18 1 Patented July 23,1912.

3 SHEETS-SHEET 2.

T. LARSSON.

Y AUTOMATIC STOPPING MECHANISM FOR ELEVATORS.

APPLICATION FILED APR. 6 1905. RENEWED MAY 27, 1912. 1,033, 1 8 1. Patented July 23, 1912.

s SHEETS-SHEET a.

To all whomit may concern:

THURE LARSSON, or WORCESTER, mnssacnusnir'rs, AssIGNon T0 HIMSELF, wIL- LIAM E. n. s'ronfns, 0F NEW YORK, 1v. mnssacnusnrrs. y

Y., AND FRED a. JoNns, on woaonsrnn,

auronia'rio s'rorrmel'nnomrsm roe nnnva'rons. 1

v Specification of Letters Patent.

Patented Jul 23, 1912.

Application filed April 3, 1905, semi N0. 263,673. Renewed-May '27, 1912'. .SerialNo. 700,082.

' Be it known that I, -THURE LAnssoN, a subject of the King of Sweden, residing at Worcester, in the county" of \Vorcester and State of Massachusetts, have invented a new and useful Automatic Stopping Mechanism for Elevators, of which the following is a specification- This invention relates to a governor-device inside the plunger casing of a plunger elevator-for controlling the outlet to the toand-from pipe in case of accident; and to a combination of the governor device-with-a -stop mechanism.

In the accompanying three sheets of I drawings, Figure lis a side view partly broken away of sufiicient parts of a plunger elevator to illustrate the application of this invention thereto. Fig;2 is a plan view of vice inside the plunger casing. Fig. sectional view of the casing-head.

the same. Fig. 3 isv a die rammatic view illustrating the action of t e governor de- 4 is a i r is a transverse sectional view thereof. Fig. 6 is a fragmentary view of the governor de vice. Fig. 7 is a side view of sufiicient parts of a lunger elevator plant to illustrate a modi ed form of construction and, Fig. 8 is a sectional view of the stop-valve which cuts off the exhaust. from the to-and-from pipe when the car reaches the bottom of its run.

The principal object of my invention is to provide an automatic governor device for controlling a hydraulic plunger elevator incase of accident, and tocombine thegovernor device with an automatic stop mechanisr'n.

The governor device is preferably located inside the cylinder-head, and as herein illustrated, this governor device, consists of a shifted so as to throttleor entirely out ofi connection with the to-and-from p1pe,"thus slowing down the speedof the elevator.

o oration by accidents, sue ,for ez zample as t ebreaking of he to-and-from'pipe;-whi1e "the'combined action of the governor m I p is descending.

nism and stop devices provides a variable stopping action which will varyin accordance with thespeed at which the car isde scending. That is to say, while the or- -'dinary stopping connections are intended to commence the operation'of retarding the car and finally bringing the car to rest at fixed points; by combininga governor mechanism withmy stoppingdevices I am able to secure a variable stopgingeii'ect which Wlll havean earlier retar ing action in accordance'with thespeed at which the car Referring to the diailwings and in detail for a des'crlpt-ion ofconstructlon embodying this invention, G designates theplunger casing of ordinary elevator; Running. up and downjn'the'. casing is a, plunger P which carries at its up'per end -.the car,D.

The car D as shown -"inn Fig'. 2 is guided on suitable'ways, and'also: guided in ways at the side of the car .D}is a counterweight W. The stopping devices. may be operated either from a suitable abutment or wheel on the car, or from the counterweight.

for the The water supplying=connections plunger casing maybe arranged as shown in Fig. '2, and comprises the" to-and-from pipe T which may be connected through a stopvalve 12 and the main valve V to the outlet 11, or which ma be. connected thr'ough a stop-valve 13 an the -main valveV to the inlet 10. The stopva1ves12 and 13 are of similar construction, and the outlet stop valve 12 is illustrated in Fig. 8.

In order to provide a contact bar which will operate reliably to stop a high speedelevator itfis essential that bar should stiff enough to-resisttheheavy strains du t0 the impact: with the iioiing car or counterweight, and in order to provide-a still and reliableiconstruction, -'I provide an 'arrangement of connected linkwork which forms; in

As shown in Fig. 1," 14 designates the contact bar-which is engaged by a roller or abutment A on the car. The contact bar 144s supported near its upper end by a bellcrank 15,-near its center by a bell-crank 16 which is connected thereto by an adjustable or sector 18-whioh is connected thereto by an adjustable link, 19.- The other arms of thebll-crank -16 and 17 and the sector 18 are by a -tension member or rodYO.

r The governor device me; be brought into Jink 1 7,"and nearits bottom by a bell-crank By ineans of this construction it will be seen that thecontact bar 14 is supported at a plurality of points, and that any tendency sets of linlcwork being operated by the elevator car,- and the'bottom set of link-work being connected by'suitable connections to operate the stop valve 12; while the linkwork at the top of the run may be connected tooperate the stop-valve 13. Each of the stopwa'lves 12 and 13 is intended'to autonuitically stop the fiow of water through the to-and-from pipe. For example, the stopvalve 12, as shown in Fig. 8, is provided with a piston Z which shut-s ofi. connections with the outlet pipe 11 and 'stops' the car when it reachesrthe bottom of its run. The stop-valve 13 for automatically stopping that car at the top of its run is of similar construction and need not be illustrated nor described at length; In some cases, however, instead of employing link-work at the top and bottom of the run, all the stopping connectionsmay be'arranged at the bottom of the run, one set of link-work for stopping the car asit is coming down being controlled by'the, car. itself, and the second set of connectionsifor stopping the car at the top of its run being controlled by an abutment or wheel B carried by the counterweight W,

the cbunterweight being set to reach the bottom of its run at the same time that the car reaches the top of'its run.

The construction of the governor device is most clearly illustrated in Figs. 4 to 6. As shown in these figures,-. the. plunger cas- -ingCis'providedf with an opening 28' for theto-and-from pipe T, and mounted inside the plunger casing is a shell 29. having a port normally registering with the opening 28. Openingabove the governor device or shell 29 is a throttling ,passage'31 having a throttling screw 32. -The passage 31 normally eq'ualizes the pressure above and below the governor device. but ll'lfilSQOf an abnormal fall of pressure to thepiston casins at? 'pipe andjeither retardingor stopping the fall, otf elevator ear.

' governorqdeyiee'inside' the'casi n rea ersresentsa ing, such for example as would-be caused by the ,brealtingof the to-and-fro'ni pipe, the

governgr; device or shell QO wouldJ be raised at. thus throttling or entirely cutfrom its se onueetron Wltll;tl l e to-and-from This, automatic gofa plunt'a -with the t thebot ger eleva tort 'combine, toad van tom- 0f: gain. any

As, shown in l l g l, the sector 18 has gear teeth meshing with-a pinion on a horizontal shaftifzt 8 Connected zlwith'gthe horizontal Uni-rip; 1: a

shaft 24. by bevel gears is-a second horizontal shaft 25 which extends into a casing 26 on the side of the plunger head.

As shown in Figs. 4 and 5, the shaft 25 is provided with a w0rm-whe'cl'27 which meshes with inclined teeth or grooves 30 in the governor device 29. By means of -this construction when the governor device 29 is automatically lifted or raised, its upward travel will be guided by the engagement of the worm with the grooves therein, so that it will be partly turned or rotated. This is of advantage, asit provides a variable throttling of the elevator'in case of emergency. This is illustrated in Fig. 3, which shows three possiblepositions of the port or opening of the governor device 29. That is to say, when the governor device is lifted it will not only have throttling action on account of its vertical motion, but it will ,also be more or less turned, so that less mot-ion will be required from the link-work to entirely close connection between the plunger casing and the to-and-from pipethan when the governor" device is in its lower or normal position, and it is due to this that by combining the governor device with the stop mechanism, I am enabled to get a differential stopping act-ion, acting morepromptly in case of emergency than during ordinary service conditions.

I am awarethat many changes may be made in practising my invention by those who are skilled in the art, and while my invention so far as it relates to the governor device is particularly adapted to a hydraulic plunger elevator, it is to be understood that mystopping mechanisms are also applicable to elevators of other types. I do not wish, therefore, 'to be limited to the particular constructions Ihave herein shown and described, ut

WhatI do claim and desire to secure by Letters Patent of the United States is:'

1. In a plun er elevator system, the com bination of a plunger casing, a plunger vertically movable therein, a to-and-from pipe connected to the plunger casing, a throttling device mounted inthe plunger casing, and consisting of a shell having a port normally registering with the opening to the to-andfrom pipe, and a restricted passage admitconnection with t e toand-from pipe.

2. In a plunger elevator system, the com-' bination of a plunger teasing, a plunger vertically movable therein, 'acar on the upper end of the plunger, a to-and-from pipe connected with the plunger casing, a throttling device inside the plunger casing, and connections for actuating the throttling device as the car approaches the end of its run.

'3. In aplunger elevator system, the comtically movable therein,

bination of a plunger casingya plunger ver- 1 nected with the plunger casing, a shell intic-ally movable therein, a car on the upper end of the plunger, a to-and-trom pipe connected with the plunger casing, a rotatable shell mounted inside the plunger casing and acting as a throttling device between the plunger-casing and the to-and-t'rom pipe, and connections for turning the shell when the car approaches the end of its run.

4. In a plunger elevator system, the combination of a plunger casing, a plunger vertically movable therein, a car on the upper end of the plunger, nected with the plunger casing, a throttling device inside the plunger casing operated by fluctuations of pressure to the plunger casing, and connections for also operating the throttling device as the car approaches the .end of its run.

5. In a plunger elevator system, the combination of a plunger casing, a plunger vera car on the upper end of the plunger, a to-and-from pipe con- 0091a 01 this patent may be obtained for five cents each, by Washington, 11 0.

a to-and-from pipe con-' side the plunger casing acting as a throttling device between the plunger-casing and the to-an l-from pipe, and a worm-Wheel connection for operating the shell when the car approaches the end of its run, said worm-wheel connection also serving to turn the shell when the same is lifted by fluctuations of pressure to the plunger casing, whereby a variable cured.

6. In an elevator, ear and its plunger, enlarged portion, larged portion for regulating the speed of travel of the car.

In testimony whereof I have hereunto set my hand, in the presence of two subscribing witnesses.

THU RE LARSSON.

the combination with a of a cylinder havlngan Witnesses:

PHILIP W. SOUTI-IGATE, MARY E. REGAN.

addressing the Commissioner of Patents,

stopping action is se-- and means within said en- I

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