US1302557A - Controlling mechanism for elevator-cars. - Google Patents

Description

A. W. HUBERS.

CONTROLUNG MECHANISM FOR ELEVATOR CARS.

APPLICATION FILED MAR. 15. 19:1. RENEWED MAR. 1.1919.

1302,55? Patented May 6, 1919.

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CONTROLLING MECHANISM FOR ELEVATOR CARS. APPLICATION FILED MAR. 15. 1917. RENEWED MAR. 1.1919.

1,30%,55'7 Patented May 6, 1919.

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ALBERT W. HUBEBS, OF NEW YORK, N. Y., ASSIGNOR T0 HENRY F. HUBERS, OF NEW YGRK, N. Y.

CONTROLLING MECHANISM FOR ELEVATOR-CABS.

Specification of Letters Patent.

Patented May 6, 1919.

Application filed March 15, 1917, Serial No. 154,922. Renewed March 1, 1919. Serial No. 280,187.

To all whom it may concern:

Be it known that I, ALBERT W. HUBnRs, a citizen of the United States, residing in the borough of Manhattan of the city of New York, in the State of New York, have invented certain new and useful Improvements in Controlling Mechanism for Elevator- Cars, of which the following is a specification, reference being had to the accompanying drawings, forming a part hereof.

- This invention relates to controlling mech anism for elevator cars which operates on the principle described and claimed in U. S. Patents No. 918,051 dated April 13, 1909, and N 0. 1,155,065 dated September 28, 1915, issued to the present applicant. In said patents the principle of operation is brought out fully and suitable mechanism for practising the invention is disclosed. The present application seeks to cover specific improvements to such mechanism whereby its action is rendered more certain and invariable and its' construction and disposition with relation to the elevator car and to the well are such as to make it of greater simplicity and more inexpensive in its initial cost and in the cost of applying it to elevator cars now in use. A further object of the invention is to make the improved controlling mechanism entirely independent of the elevator shaft and the elevator car and permit it to be applied to the car without changing the construction or character of any of the parts thereof. Still another object, which is of primary importance, is: to provide suitable controlling mechanism of the type with which the invention is concerned which may be mounted on the undera side of the elevator car and have its 00- operating detent mounted in the elevator shaft wholly below the level of the landing. In this way, none of the parts are exposed to view and they are always safely guarded against injury. ,Further, such disposition permits alteration or removal of any of the usual parts of the car or the shaft door with out disturbing the controlling mechanism. The invention will be more fully described with reference to the accompanying drawings in which-- Figure 1. is a fragmentary view of an elevator car and the well showing the appli cation of the improved controlling mechanism thereto.

Fig. 2 is a fragmentary view in elevation of the detent and its operating devices as seen along the line 22 of Fig. 1 and looking in the direction of the arrows.

Fig. 3 is a fragmentary detail view of the controlling mechanism, partly in plan and partly in horizontal section, taken along the plane indicated by the broken line 33 of Fig. 1 and looking in the direction of the arrows.

Fig. 4 is a fragmentary view similar generally to Fig. l but showing the application of the improved mechanism of somewhat modified form, but disposed in substantially the same relationship to the car and to the elevator well.

Fig. 5 is a view similar generally to Fig. 2 but showing the modified controlling devices illustrated in Fig. a and looking along the line 5-5 of Fig. a in the direction of the arrows.

Fig. 6 is a detail view, similar generally to Fig. 3 and taken along the plane indicated by the line 66 of Fig. 4C.

The improved controlling mechanism when applied to an elevator car is intended to prevent the car from being moved from the landing until the elevator door is wholly closed and is also intended to prevent creeping of the car while it is opposite the shaft door. This creeping is particularly objectionable in hydraulic elevators because of the leakage in the valves etc. The principleof the invention, as disclosed in prior Patent No. 918,051 above referred to, consists in providing a sliding element such as a rack bar on the elevator car which rack bar is connected with the controller and a relatively fixed cooperating detent on the wall of the shaft, these parts being engaged when the car is opposite the landing and the door is opened, so that movement of the controller by the operator is prevented and creeping of the car in either direction causes automatically the throwing of the controller to a position which will counter-act such creeping movement. The present invention seeks merely to cover improved mechanism for effecting the intended control of the movements of the car in the manner described. This mechanism in the improved constructions is mounted wholly below the car floor and so is not only hidden from view, but is protected against injury and may be much simpler and more inexpensive than devices heretofore proposed.

Referring to the drawings, the car a has its movements controlled in the usual manner by means of the controller handle 6 disposed within convenient reach of the operator. To the controller handle I) is operatively connected a sliding rack bar 0 which is mounted in depending channels a bolted on the underside of the car fioor a adjacent the front edge thereof. The sliding rack bar 0 is connected to the controller handle Z) in Fig. 1 by means of a link 0 which is pivotally connected to the rack bar and to a swinging lever fulcrumed at 0 to a fixed bracket a carried 011 the underside of the car floor. The swinging lever arm 0 is connected by a link I) with a bell crank lever c pivotally mounted on the side wall of the car and connected pivotally with alink 0 which is, in turn pivotally connected to the controller handle Z). By the construction described, it is evident that swinging movement of the controller handle I) or vertical movement of the rack bar 0 in its guideways a will be communicated in a corresponding degree to the other member.

The detent (Z is formed as a sortof a tooth. carried on a rock shaft (Z which is journaled in bearings e secured to the wall of the elevator shaft and this rock shaft is adapted to be oscillated in such a manner as to swing the detent 03 into and out of engagement with the teeth on the rack bar 0 in amanner which will appear. On the end of the rock shaft (Z is secured an arm (Z the end of which is connected pivotally by links 03 d with a swinging arm cl pivoted fixedly on the face of the shaft at (F. From this clescription, it is evident that swinging movement of the arm d will cause rocking of the shaft d so as to throw the tooth cl into and out of the path of the rack bar 0. This swinging'of the arm (Z is brought about automatically by the opening and closing movements of the shaft door 6. Depending from the fac of this door is a fixed bracket arm f, the lower end of which may be formed as a curved finger f presenting a cam-like surface arranged to be moved into and out of operative engagement with a roller (Z carried on the upper end of the swinging arm 65". When the shaft door is closed, as indicated by the dotted lines in Fig. 2, the fixed arm f moves the swinging arm cl to such position as to retract the detent d from its engagement with the rack bar 0. When the door is slid open by the operator the cam formed on the lower end of the fixed arm f will engage the roller d on the swinging arm (Z and carry this arm to a position where the detent cl will be thrown into engagement with the rack bar 0, the arm f finally passing out of engagement with the roller.

In operation with the shaft door 6 fully closed, it is evident that the detent 61 will be retracted from the well and held out of the path of the rack bar 0 by reason of the engagement of the arm f with the swinging arm d. When the operator brings the car to rest opposite the landing stage or approximately opposite it, the rack bar 0 will be disposed about opposite the detent cZ so that when the door is slid open the movement of the detent cl by the engagement of the arm f with the roller d will cause the detent to move into engagement with the teeth on the rack bar. With the parts in this position it is evident that the operator cannot swing the controlling lever to start the car so long as the door is open since the detent d by its locking engagement with the sliding bar 0 serves to lock the controller .7). Further, creeping of the car along the well will cause a sliding movement of the rack bar 0 along its guide-ways a and such relative movement of the rack bar with relation to the car will be communicated to the controller handle Z) so as to throw this handle to such position as to counter-act the creeping. In other words, when the car tends to creep upward the controller handle will be thrown to open the valve to initiate downward movement of the car and vice versa, the re sult being that the car is always maintained automatically in a balanced position.

In the modified construction shown in Figs. 4-6 the connection between the controller handle 6 and the sliding rack bar 0 is made wholly beneath the car floor a In this construction the supporting rock shaft 6 for the controller handl 6 has fixed thereto a crank arm 6 which is pivotally connected through a link 6 with the swinging arm 0 which is, as before described, connected to the sliding bar 0 through a pivoted link 0'.

In this construction the detent is also modified somewhat. In place of the swinging detent (Z, there is mounted on the wall of the well a swinging detent arm 9 on which is carried a detent tooth g for engagement with the teeth on the rack bar 0. The swinging arm is pivoted at its lower end in supporting channels it fastened to the face of the well and is connected at its upper end by means of links 9 with the reciprocable block 2' slidably supported in the guide channels h. This block '5 is connected through a slot and stud connection to one arm of a bell crank lever Z which is pivotally supported on the face of the shaft and has on its other arm a roller Z adapted to be engaged by the forked arm 7 described in connection with the embodiment shown in Figs.

1-3. The operation of the devices shown in the modified construction is the same as that heretofore pointed out. The detent tooth g on the swinging arm 9 is moved into and out of operative engagement with the teeth on the rack bar 0 through the engagement of the arm 7" with the bell crank lever Z, this lever serving to reciprocate the block 2' in the channels it and so swing the arm 9 with a toggle like action. The positive connection between the controller 6 and the sliding rack bar 0 insures the same locking engagement heretofore described. The controller 5 cannot be thrown unless the door 6 is fully closed and creeping of the car is automatically counter-acted by movement of the controller I) in the proper direction by its improved connection with the rack bar.

In the advance sought to be covered by this application, the structure is simple and inexpensive and may be applied readily to elevator cars and shafts without alteration thereof in any respect. The apparatus is also accessible for adjustment and repair, and being disposed Wholly beneath the car floor has not only the advantage of being entirely concealed from view, but further permits alterations or changes in any of the usual parts of the car or landing wlthout disturbance of the controlling mechanism.

1 claim as my invention:

1. The combination with the controller of an elevator car, of a slidable rack element, vertical guide channels for the rack secured to the underside of the fioor along the front edge thereof, operative connections between the rack and the controller carried on the underside of the car floor, a detent below the landing stage engageable with said rack element and a rigid arm depending from the door and formed with a cam to cooperate with the detent for throwing the same into and out of engagement with the rack upon the opening and closing of the door.

2. The combination with the controller of an elevator car, of a slidable rack element mounted below the car floor, operative connections between the rack and the controller comprising a link pivoted to the rack, a swinging lever arm pivoted on the underside of the car floor, a second link pivoted to said lever and an arm to which said last named link is pivotally connected, said arm being connected operatively to the controller handle and a detent below the landing stage engageable with said rack element.

3. The combination with the controller of an elevator car, of a slidable rack element mounted below the car floor, operative connections between the rack and the controller carried on the underside of the car floor, a detent engageable with said rack element comprising a rock shaft journaled in the elevator shaft, a swinging tooth fixed to the rock shaft, an arm on the rock shaft, a swinging lever pivoted in the shaft, a link connection between said arm and the lever, a roller on the end of the lever and a depending arm fixed on the shaft door and mounted in operative relation to said roller, whereby the toothed detent is thrown into and out of engagement with the rack on the opening and closing of the door.

This specification signed this 12th day of March, A. D. 1917.

ALBERT W. HUBERS.

Gopiea of this patent may be obtained for five cents each, by addressing the "Gommlecioncr of Patentc,

Washington, D. G.

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