US1131963A

US1131963A - Safety-gate for elevators.

Info

Publication number: US1131963A
Application number: US81351314A
Authority: US
Inventors: Frederick C Rojahn
Original assignee: Individual
Current assignee: Individual
Priority date: 1914-01-21
Filing date: 1914-01-21
Publication date: 1915-03-16
Anticipated expiration: 1932-03-16

Description

F. U. ROJAHN.

$AFETY GATE FOR ELEVATORS.

APPLICATION FILED JA1L21, 1914 Patented Mar. 16, 1915.

3 SHEETS- THE NORRIS PETERS 60.. F'HOTC'LITHQ, V/ASHINGTON, D C.

P. O. ROJAHN.

SAFETY GATE FOR ELEVATORS.

APPLICATION FILED JAN.21, 1914.

Patented Mar. 16, 1915.

SHEET 2 3 SHEETS- Law THE NORRIS PETERS C0,. FHOTO-LITHO.v WASHINGTON, Dv C4 F. G. ROJAHN. SAFETY GATE FOR ELEVATORS.

APPLICATION FILED JAN.21,1914.

Patented Mar. 16, 1915.

3 SHEETSSHEET 3.

with lo-0% THE NORRIS PETERS CD.. PHOTO-LITHO.. WASHINGTON, D, C,

FREDERICK C. BOJ'AHN, OF ALTOONA, PENNSYLVANIA.

SAFETY-GATE FOR ELEVATORS.

Specification of Letters Patent.

Patented Mar. 16, 1915.

Application filed January 21, 1914. Serial No. 813,513.

To all whom it may concern Be it known that I, FREDERICK C. RoJAHN, a subject of the Emperor of Germany, residing at Altoona, in the county of Blair and State of Pennsylvania, have invented certain new and useful Improvements in Safety-Gates for Elevators, of which the following is a specification.

This invention relates to the general subject of elevators, and has particular reference to a novel door actuating means of special utility in connection with elevator cars of both the freight and passenger type.

One of the objects of the present device is to provide positive means whereby the gate cannot be raised except at the landing, and must be closed before the elevator leaves the floor landing.

Another object of the device is to put the control of the gates in the hands of the op erator, who with the use of but one lever can open or close them at the landing, at the time the elevator car approaches.

With these and many other objects in view which will more readily appear as the nature of the invention is better understood, the same consists in the novel construction, combination and arrangement of parts hereinafter more fully illustrated, described, and claimed.

It will be readily understood that the essential features of this invention are necessarily susceptible to a wide range of structural modification without departing from the spirit or scope of the invention, but a preferred and practical embodiment of the invention is shown in the accompanying drawings in which Figure 1 is a side elevation of an elevator shaft showing one form of gate controlling mechanism. Fig. 2 is a front elevation of the parts shown in Fig. 1. Fig. 3 embodies side and end views of a form of speed multiplying mechanism used in connection with the invention. Fig. 4 shows a portion of the elevator car in side elevation with the gate operating mechanism installed thereon. Fig. 5 is a front elevation of the parts shown in Fig. 4. Fig. 6 is a bottom plan view of the parts shown in Figs. 4 and 5. Fig. 7 is a side elevation of an elevator car showing another form of the invention. Fig. 8 is a front elevation of the construction shown in Fig. 7. Fig. 9 is a detail view of the shock absorber used in connection with the elevator gate. Fig. 10 shows a form of shock absorber used in connection with the elevator gate closing device.

Similar reference characters designate corresponding parts throughout the several figures of the drawings.

In carrying out this invention no material change is necessary either in the ordinary form of elevator car or the elevator gate and to this end the invention contemplates in connection with a car body designated in its entirety by the numeral 10, a suitable door actuating mechanism.

The car floor or platform 11 is preferably provided near its front side edge with a depending supporting bracket member 12 having the down-turned latch supporting ears 13. Within the said cars 13 is slidably mounted a latch member 14 which consists of a latch tongue 15 which is beveled at one end and provided at its other end with a collar 16, and also a shank portion which is threaded at the extremity opposite the latch tongue, and provided with a nut 17 thus rendering the entire latch member adjustable in the ears 13. For the purpose of keeping the latch tongue 15 projecting outwardly, the shank portion of the latch member is surrounded by a coil spring 18 which abuts against the collar 16 and one side of one of the depending ears 13 of the bracket 12.

At a point substantially in the center of the same side of the car platform 11 from which the bracket 12 is suspended, there is provided a latch supporting plate 19 which carries a latch member 20 whose construction is similar to that of the latch member 14. In connection with the latch member 20,

it will be observed that the same is arranged in a different plane from that of the said latch member 14. That is to say, that the two latch members are arranged at different levels, the purpose of which will hereinafter more fully appear.

Between the latch supporting bracket member 12 and the latch supporting plate 19, there is secured to the underside of the car platform 11 a depending fulcrum bracket 21. The said fulcrum bracket 21 has fulcrumed thereto an operating lever 22 which has pivotally connected at its upper end a latch actuating bar 23 whose end is beveled as at 24: and adapted to slidably engage behind the collar 16 of the latch member 20. The lower portion of the operating lever 22 has pivotally connected thereto a second latch operating bar 25 which is beveled as at 26 and adapted to slidably engage with the collar 16 of the latch member 14. In order to impart a swinging movement to the operating lever 22, there is provided an operators lever 27 which is suitably journaled to the underside of the car and pivotally connected with the operating lever 22 by means of a suitable link 28.

For the purpose of actuating the elevator gates G which are vertically slidable in the elevator shaft S, and arranged at each floor landing, there is also provided at each floor landing a gate lifting lever 29 which is pivoted as at 30 approximately mid-way between its ends to a supporting bracket 31 depending from one of the shaft beams B which is on a level with the floor landing. The ends of the said gate lifting lever 29 are suitably rounded as at 32, and one end 33 thereof is provided with a flexible connection 34: to the gate lifting mechanism.

Since the arrangement for lifting the gates shown in Figs. 1 and 2 of the draw ings is sometimes inadequate, due to the limited movement of the lifting bar, the multiplier designated in its entirety by the numeral 35 is provided. This particular design of multiplier is adapted to be inserted between the

pulleys

36 and 37, with the rope 38 secured to the end 33 of the lifting bar, and the rope 39 to the elevator gate G.

Figs. 7 and '8 show modified means for raising and lowering the gate G and instead of the multiplier 35, the gate G is provided with a pantog-raph operating device designated by the numeral 40. This modification also provides for a gate shock absorber ll shown in Fig. 9, while Fig. 10 shows an air shock absorber designated by the numeral 42. The shock absorber 42 consists essentially of an inverted tube i3 which is secured to the beam 44:. This tube 43 receives the plunger -15 which is provided with :a slot 46 through which the lever l7 passes. Since the lever 47 is fulcrumed at48, a downward movement of the gate G will force the plunger 15 into the tube 4:3 compressing ,the air therein, thus forming a pneumatic cushion which checks the fall of the gate G.

The operation of this improved device may be summed up as follows: Assume that the elevator car 0 is traveling in the elevator shaft S, if the operator wishes to pass any landing with the gate at that landing left closed, the operators lever 27 is pushed backward. This action on the part of the operator withdraws both

latches

15 and 20 and prevents their engagement with the lifting lever 29 which must be engaged in order to open the gate G. Should the elevator be descending and the operator wish to open the gate, the operators lever 27 is moved forward and the latch 15 will engage the lifting lever 29 at a point P drawing the same clown, thereby opening the gate as heretofore explained. Should the elevator be ascending in the shaft and thelever thrown forward the latch 20 engages the other end P of the lifting lever 29 with the same result as above.

Without further description and elaboration it is believed that the many advantages of the herein described elevator gate operating device will be readily apparent.

I claim:

1. A device of the character described including in combination with an elevator shaft and a car operable therein, gates slid able in the shaft and arranged at floor landings, a gate lifting lever fulcrumed at each floor landing and operably connected with its respective gate, brackets respectively arranged at and below the floor of the car, adjustably mounted and reversely arranged spring latches mounted in said brackets, and manually controlled lever means including a latch retracting bar for each latch for withdrawing said latches out of the path of said lifting levers or releasing them for engagement with either end of said levers according to the ascent or descent of the car.

2. A device of the character described including in combination with an elevator shaft and a car operable therein, gates slidably arranged in the shaft at floor landings, a gate lifting lever operatively connected to each gate, reversely arranged retractable latches disposed at different levels for engaging either end of a selected lifting lever to raisea particular gate, latch retracting means including horizontally movable retracting bars and an operating lever pivotally connected at its ends with saidbars, and a single manually controlled lever having a link connection with the operating lever of the latch retracting means.-

:3. A device of the character described including in combination with an elevator shaft and an elevator car operable therein,

gates vertically slidable in said shaft and arranged at floor landings, a gate. lifting lever fulcrumed to the shaft at each floor landing and having a flexible connection with said gate, a bracket secured to the underside of the car floor and projecting below the same, a spring pressed latch mount- .ed in said bracket, and. a second bracket set in the floor of the car, a spring pressed latch of the latches with one end of the gate liftmounted in said latter bracket, latch opering lever. 10 ating bars for retracting the latches, an In testimony whereof I afiix my signaoperating lever pivotally connected at its ture in presence of two Witnesses.

ends With the latch operating bars and also FREDERICK G. ROJAHN. fulcrumed to the car, and a manually con- Witnesses:

trolled lever for actuating the said oper- ROY B. MoDERMrr'r,

ating lever to cause the engagement of one FRANK M. KIBLER.

copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

walhlnzton, D. O.