US1088936A - Hinged doors and operating mechanism therefor. - Google Patents

Description

ROWNTREE. HINGED DOORS' AND OPERATING MECHANISM THEREFOR.

AFPLIOATION FILED, APR. 3, 1909.

Patented Mar. 3, 191 i 2 sums-21mm 1.

v ROWNTREE. HINGED DOORS OPERA I ING MECHANISM THEREFOR.- APPLICATION FILED APR. 3, 1900.

1,088,936, Pa iznted Mar.3,1914.

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l/vi imam ca z 5] me Mow ml lfliafrow I UNITED STATES PATENT OFFICE.

HAROLD ROWNTREE, OF CHICAGO, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS, TO

' NATIONAL PNEUMATIC COMPANY, A CORPORATION OF WEST VIRGINIA,

KING-ED DOORS AND OPERATING MECHANISM THEREFOR.

. Specification of Letters Patent.

Patented Mar. 3, 1914..

, Application 1lledAprll3,1909. Serial No. 4s7,ee7.

Toall whom it may concern:

Be it known that I, HAROLD Rowu'rnan, a citizen of the United States residing at Chicago, county of Cook, and state of Hinois, have made a certain new and useful Invention in Hinged Doors and Operating Mechanism Therefor, of which the following is a specification.

This invention relates to hinged doors, and particularly to double hin ed doors and power operated actuating mec anism t ere- The object of the invention is to provide a construction of double hinged doors and operating mechanism therefor which is simple and eflicient.

Other objects of the invention will appear more fully hereinafter.

The invention consists substantially in the construction, combination, location and relative arrangement of parts, all as will be more fully hereinafter set forth, as shown in the accompanyingdrawings and finally pointed out in the appended claims.

Referring to the accompanying drawings,

. Figure 1 is. a view in top plan of a construction of door and associated step and operating mechanism therefor, embodying the principles of my invention, parts in hor1zon tal section. Fig. 2 is a view' in vertical section on the line 2, 2, Fi 1..

The same part is desl gnated by the same reference sign wherever it occurs.

In the drawing reference sign 3 designates the floor of a car, 4 are j ambs, posts or other parts arranged to form a doorway space, or entry between them. At the sides of this doorway and adjacent the 'ambs or posts 4, are vertically extending -s afts 5, suitably journaled to rock in bearings rovided therefor. Castings 6, are carried y the shafts 5, to rock or swing therewith. The doors 7 are secured to the castings 6, and supported thereby. The shafts 5, are somewhat removed from the adjacent jambs or posts 4,

a so that the doors, when open, will lie close against the faces of the jambs. In order to close the space between the shafts and their adjacent jambs when the doors are closed; each door is provided on the edge thereof which is closest to the jamb, with an auxiliary narrow panel 8 which, as indicated in dotted lines, in Flg. 1, forms a clotia support therefor.

sure for the space referred to when the door is closed. The narrow panels 8 are carried by the extensions 9, of the castings 6. The castings, at or adjacent their outer or free ends are provided with extensions 10, in whlch. are carried vertical rods 11, designed to form hand grabs to aid passengers enterng or leaving the car, where my invention is applied to street cars, to ascend to ordescend from the floor of the car. The vertical rock shafts 5 may also serve the same purpose.

To, the underside of the floor supportmg beam 12, or other suitable or convenient part, 15 secured a castin 13, which may be arranged to form one o the bearings 22, in

which the shaft 5 is journaled.. Upon a pivot pin 14, carried by said castings -13,is f

pivotally-mounted a bracket 15, arranged to form a sup ort for a step 16. Of course it will be un erstood that a similar support is provided, if desired, at each end of the ste so as to afford an efficient and substan- Each bracket 15 is provided with an extension 17, beyond the axis of its supporting pivot in 14, and which extension cotiperates witli an adjustable stop or limit pin 18, mounted in the casting 13, to form an abutment forthe step when in position for use, as clearly shown 1n.Fig. 2. Pivotally connected atone end to the extension 17, of each bracket 15, is a link 19, the other end of said link being pivotally connected to a crank arm 20, mounted on the adjacent shaft 5, whereby, when the shaft is rocked to open or close the door the step is coiiperatingly moved into or out of position for use as the case may be. Since a casting 15, is provided for each end of the step, and each casting is connected to its adjacent shaft 5, it follows that the associated doors, shafts and step must all move in unison.

Suit-ably supported by brackets 23, or otherwise, mounted on the inner face of the beam 12, or other convenient part, is a power cylinder 24. This cylinder. is open at both ends and has two oppositely faced pistons 25, therein. The shafts 5, are provided with crank arms 26. which are respectively connected by links 27, or otherwise, to the pistons 25, whereby when said' pistons are moved the shafts 5 are rocked. The pisthe ton rpds or links 27, extend through the open ends of the cylinder for connection. to

istons. A valve device, indicated general y by reference sign A, Fig. 1,-controls the supply and exhaust-of operating medium to and from the cylinder. In the form shown a pressure supply connection 28, ex-

tends from the valve or control device A, to a point midway the length of the cylinder 24, and betweenthe pistons 25. The valve or. control device comprises a valve 29, having an operating handle'30, and is adaptedf to operate over a seat surface 31, having the pressure supply port 32, the exhaust port tails forms no part of the present invention,

and hence any suitable or convenient form of control device may be employed.

Where the control device is manipulated so as to admit pressure medium to the cylinder 24, at a point between thegpistons 25, said pistons are forced apart/thereby coincidently rocking the shafts .5, and hence swinging the doors closed, the doors being held in their closed positions by the force of the pressure medium and when the pressure medium is opened toeiihaust from the cylinder the doors are free to move to open position. In order to insure themovement of the doors'to open position when the pressure is exhausted from the cylinder 24, I provide each shaft 5, with a crank arm 37, arranged to project in opposite directions, and I connect-these'crank arms by means of a strong spiral or other spring 38, the tension of which is constantly exerted in a direction to hold the doors open. The operation of the doors to their closed position by the pressure medium acting on the pistons 25,- is against the tension of spring 38. Co incidently with the movements of-the doors the actuation of the step 16 is also accomplished through the connections above described.

A door and operating mechanism there for, such as above described. is simple, in-- expensive, cheap and substantial, and 'can be easily and quickly installed. It is obvi ous that the control device A, may be lo.- oatcd at any convenient point.

By reason of the fact that the pressure medium holds the doors in their closed posilion it will be observed that I avoid the -ncce.ssity of providing ,positivc locking mechanism for thedoors when in this position. This is a desirable feature in street, subway or elevated car constructions for the reason that while the doors are held closed with 'suflicient degree of pressure to prevent thesame from being opened by passengers lean-ingthereagains t, still, by applying concentrated force the doors may be opened in case of panic, accident or other cause, or in case the-conductor should be described means for cushioning the door movements are not required. 1 I

Having now set forth the object and nature' of my invention, and aconstruction embodying the principles thereof, and having described such construction, its purpose,

function and mode ofoperation, what I claim as new and useful and of my own lnvent on, and desire to secure by Letters Patent is l 1. The combination with'door jambs arranged on opposite sides of a doorway, a vertical shaft Ournaled adjacent each jamb, a door connected to each shaft, a crank arm on each shaft, a piston connected to each crank arm, a cylinder in which said pistons move in opposite d rections, and means for controlling the supply and exhaust of operating medium from the space between said pistons.

'2. The combination with ja-mbs arranged onopposite sides of a doorway, a vertical shaft'journaled adjacent each jamb, a door connected to each shaft, a crank arm on each shaft, a spring connecting said crank arms, independentpistons respectively connected to said shafts for rockingthe same, a cylinder in which both pistons operate and means for simultaneously actuating said pistons against the tension of said spring.

3. The combination with jambs arranged on opposite sides of a doorway, a vertical shaft journaled adjacent each jamb, a door connected to each shaft, a cranlearm on each shaft, independent pistons respectively connectcd to said arms, a cylinder in which both pistons operate, means for simultaneously actuating said pistons injopposite directions, to open the doors, and a spring having operative connection with both shafts to close the doors.

4. The combination with vertical shafts respectively arranged on, opposite sides of a doorway, a door'connccted to each shaft,

a crank arm on each shaft, a piston connected to each crank ,arm, a cylinder in which" said pistons move in oppo site direction, means for I controlling the supply and exhaust of operating medium set my hand in the resence of the subscrib- Lo and from said cylinder m the space lng vitnesses, on t is 31st day of March hetween said pistons, and a, spring having A. 1)., 1909.

connection with both of said shafts to yield- HAROLD ROWNTREE. 3 ingly oppose the action of said pistons Witnesses:

when the latter are actuated. LEMUEL M. SHIELDS,

In testimony whereof I have hereunto M. H. MARTIN.

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