US1364739A - Stop for revolving doors or turnstiles - Google Patents

Description

T. P. FISHER. STOP FOR REVOLVING DOORS 0R TURNSTILES.

APPLICATION FILED OCT- II, 1919.

Patented Jan. 4, 1921.

PATENT OFFICE.

UNITED STATES THOMAS P. FISHER, OF SOMERVILLE, H ASSACHUSETTS.

STOP FOR REVOLVING DOORS OB TURNS'IILES.

5 State of Massachusetts, have invented certain new and useful Improvements in Stops for-Revolving Doors or Turnstiles, of which the following is a specification.

This invention relates to revolving ole sures and more particularly to a novel form of turnstile or door especially adapted for use at the entrance or exit of a subway or; elevated railway station or similar place for controlling the passage of pedestrians therethrough.

The object of the invention is toprovidev means for momentarily arresting or checking the opening movement of the turnstile at the quarter turn and means for preventing rearward rotation of said turnstile whereby pedestrians are compelled to pass through the turnstile one at a time and are prevented from returning through the same entrance or exit.

The invention further aims to provide a revoluble door or turnstile having a checking or retarding device mounted on the arms thereof and so constructed that when the door or turnstile is revolved rapidly, the rotation thereof will be automatically checked at the quarter turn and when the turnstile is revolved slowly the retarding device will be rendered inoperative, as such, and permit the p turnstile to make a complete revolution without interference.

The invention further contemplates a retarding device operable upon quick turning movement of the" turnstile to automatically check or stop the rotation thereof and rendered inactive for this purpose when the speed of the turnstile is reduced.

A still further object of the invention is generally toimprove this class of devices so as to increase their utility and efliciency.

In the drawings: I Figure 1 is a perspective view of a turnstile equipped with the present invention.

Fig. 2 is a front elevation of the keeper for theretarding device, showing in section the position of the terminal of the retarding device as it travels within the groove of the keeper and in dotted lines the positions assumed by said retarding device as it strikes the abutment. I

Fig. 3 is a side elevation partly in section showing in full lines the position of the re- Specification of Letters Patent.

Patented Jan. 4, 1921.

Application filed October 11, 1919. Serial No. 380,005.

tarding device as it enters the groove and in dotted lines the position of said retarding device as it is about to drop by gravity. I

Fig. 4 is a front elevation illustrating a modified form of keeper.

Fig.- 5 is a similar view illustrating a. further modification, and

Fig. 6 is a detail perspective view illustrating a still further modification. The improved device forming the subect matter of the present invention is applicable to revolving doors,'turnstiles and other closures used at the entrance or exit of a subway, elevated railway station or similar place for controlling the passage of pedestrians therethrough and by way of illustration is shown in connection with a turnstile of the ordinary construction in which 5 designates the rotating post or standard and 6 the arms or contact members radiating therefrom and preferably four in number although any desired number of arms may be employed, as will be readily understood. The post or standard 5'-- is spaced from a suitable support 7 to form an exit or entrance passageway indicated at 8 Y and secured in any suitable manner to the support 7 is a keeper 9. The keeper 9 preferably comprises a. flat elongated plate havdefining a stop orabutment 13. The large end of the lower block 11 is spaced from the abutment 13 to form a groove or passage 14, said large end being provided with a straight face 15 constituting a stop or abutment.

The upper faces of the outer ends of the arms 6 are preferably cut away to form seats 16 and mounted on the .outer ends of the arms at said seats are retarding devices 17 which coact with the stops or abutments. '13 and 15 for the purpose of arresting the forward rotary movement of the turnstile at the quarter turn and for preventing rearward rotation ofsaid turnstile, as will be more fully ex lained hereinafter. the retarding evices 17 is preferably mounted on each arm 6 of the turnstile and each retarding device comprises a flat bar or extension having its rear end hinged or other One of 4 by gravity as soon as the terminals 19 thereof engage the abutments 13.

It will thus be seen that as the turnstile is rotated in the direction of the arrow indicated in Fig. 1 of the drawings, the cylindrical terminal 19 of the adjacent retarding device will ride up the inclined walls of the groove 12 until the terminal 19 strikes the abutment 13 when the forward rotation of the turnstile will be momentarily arrested. When the terminal 19 strikes the abutment 13 the retarding device 17 will drop by gravity to'the dotted line osition shown'in Fig. 2 of the drawings and by en gagement with the abutment 15 effectually revent rearward rotation of the turnstile. t will furthermore be noted that if the turnstile is rotated rapidly it will be automatically stopped or retarded at the quarter turn but if the momentum of the turnstile is reduced the terminals 19 of the retarding devices will ride evenly over the walls of the groove 12 and permit complete rotation of the turnstile without affecting the retarding devices. Inasmuch as the movement of the turnstile is automatically checked or stopped at each quarter turn thereof, pedestrians are permitted to pass through the entrance or exit 8 one at a time only and, owing to the engagement of the terminals 19 with the abutments 15, rearward rotation of the turn stile is prevented so that the pedestrians cannot return by the same exit or entrance. If desired, a suitable spring may be used in conjunction. with each retarding device to assist in returning said retarding device to inoperative position, but it is preferred that the retarding device be of sufiicient weight to return by gravity without the employment of such springs.

In Fig. 4 of the drawings there is illustrated a modified form of the invention in which a strip of metal 20' is secured to the' upper wall of the guiding groove 12 with its free end bent downwardly to form a spring abutment 21. This construction prevents undue strain and jar on the arms of the pivotally mounted on a screw or bolt 24 at one side of said arm, theconstruction and operation of the device being otherwise simi lar to that shown in Fig. 1.

It will thus be seen that the retarding device is operable upon quick turning movement of the turnstile to automatically check or stop the forward rotation thereof and is renderegl inactive for this purpose when the speed of the turnstile is reduced. The device may be made in different sizes and shapes and, if desired, one of the keepers 9 may be provided for each arm of the turnstile.

Having thus described the invention what is claimed as new is:

1. The combination of a revoluble barrier having spaced manually operated contact members, of retarding means therefor constructed to automatically retard the forward movement of any contact member at a predetermined point when moved rapidly but permitting unchecked movement pas saidpoint when moved slowly.

2. The combination of a revoluble barrier having spaced manually operated contact members, of retarding means therefor constructed to autpmatically retard the forward movement of any contact member at a 'predetermined point when moved rapidly but permitting unchecked movement past said point when moved slowly and also preventing reverse rotation of said barrier.

3..A barrier comprising -a turnstile having arms, a keeper having fixed spaced abutments, movable means on the arms constructed to engage one abutment when reforvertical swinging movement on the arm' and providedwith a terminal adapted to enter the guiding groove and bear against one of the'abutments when the arm is revolved rapidly but permitted to freely pass said abutment when revolved slowly, the other abutment cooperating with said retarding device to prevent reverse movement of said arm.

5. A barriercomprising a turnstile having arms, a, keeper a'vingan upwardly inclined guiding groove and spaced abutments, and retarding devices carried by the arms v of the turnstile and movable through the guiding groove into contact with one abutment when said arms are revolved rapidly but permitted to freely pass said abutment when revolved slowly, the other abutment cooperating with said retarding devices to prevent reverse movement of said arms. a

6. A barrier comprising a fixed part and a turnstile spaced from said fixed part to form a passageway and having radiating barrier arms, a keeper secured to the fixed part and comprising upper and lowermembers spaced apart to form an upwardly inclined guiding groove and spaced abutments disposed one in advance of the other, and retarding arms pivotally mounted on the barrier arms and each havin sion movable within the guiding gLQQVB and into engagement with one of said abutiments when the barrier arms are revolved rapidly but permitted to freely pass said abutment when revolved slowly, the other abutment cooperating with said retarding arms to prevent reverse movement of said barrier arms.

7 The combination with a fixed part, of a turnstile spaced from the fixed part to form a passageway and having radiating barrier arms, a keeper secured to the fixed part and including upper and lower members spaced apart to form an upwardly inclined guiding groove, the lower member of the keeper being formed with a flat face constituting an abutment and the upper member of the keeper being provided with a depending portion having a flat face constituting an abutment, and retarding arms pivotally mounted for vertical swinging movement on the barrier arms and each havingone end thereof extended longitudinally beyond the adjacent barrier arm and provided with a reduced terminal movable through the groove in the keeper and in contact with one abutment when revolved an exten rapidly but permitted to freely pass said abutment when revolved slowly, the other abutment cooperating with said retarding arms to prevent reverse movement of the barrier arms. a

8. The combination with a fixed part, of a turnstile spaced from the fixed part to form a passageway and provided with barrier arms, a keeper secured to the fixed part and provided with a guiding groove and spaced abutments disposed one in advance of the other, retarding arms pivotally mounted on the barrier arms and provided with extensions movable within the guiding groove for contact with the abutments, and yokes spaced from .and extending transversely across the retarding arms for limiting the upward swinging movement thereof. 9. The combination with a fixed part, of a turnstile spaced from the fixed part to form a passageway and provided with radiating arms each having a portion thereof cut away to form a seating recess, a keeper secured to the'fixed part and provided with an upwardly inclined guiding groove and spaced abutments disposedone in advance of the other, retarding arms pivotally mounted on the barrier arms at said recesses and each having one end thereof projected longitudinally beyond the barrier arms to form a reduced extension movable through the groove and into engagement with one of the abutments for limiting the forward turning movement of the turnstile and into engagement with the other abutment for limiting the rearward movement of said turnstile, and means carried by the barrier arms and extending transversely across the retarding arms for' limiting the upward swinging movement thereof.

In testimony whereof I aflix my signature.

THOMAS P. FISHER. 1,. 8.

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