US1129391A

US1129391A - Means for opening and closing doors.

Info

Publication number: US1129391A
Application number: US78310013A
Authority: US
Inventors: Arno Hoehne; Hermann Krake
Original assignee: Individual
Current assignee: Individual
Priority date: 1913-08-05
Filing date: 1913-08-05
Publication date: 1915-02-23
Anticipated expiration: 1932-02-23

Description

7 mmwm A. HUHNE & HIKRAKE. MEANS FOR OPENING AND CLOSING DOORS} APPLICATION FILED AUG. 5, 1913.

Patentd Feb. 23, 1915.

2 SHEETS-SHEET 1- A. H'O'HNE & H. KRAKE.

MEANS FOR OPENING AND CLOSING DOORS.

APPLICATION FILED AUG. 5, 1913.

2 SHEETS-SHEET Z.

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. i n Aplillcaitldn filed Aust 5, 1913. serial Ito. 7%,100.

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Be it known that we, ARNo Her-1m: and

. HERMANN KRAKE, subjects of the Emperor of Germany, residing at Waldstrasse 51,

Leipzig, Germany, and Wiesenstrasse 4 13,v

Leipzig, Germany, respectively, have invented certain new and useful Improvements in or Relating to Means for Opening and Closing Doors, of which the following is a specification.

The object of the present inventlon is to preclude the difliculty now experiencedin electrically opening doors of having the door close before the return of the opening apparatus to its initial position whereby the whole mechanism is strained and sometimes rendered inoperative.

An embodiment of the invention is illustrated by way of example in the accompanying drawing, in which:

Figure 1 is an elevation showing the door closed, the circuit open and the mechanism in its normal position. Fig. 2 is a corresponding plan view of the operating mechanism. Figs. 3 to 5 illustrate the mechamsm corresponding to various positions of the door.

' The shaft 1) rigidly connected with the door a carries a clutch element a at its lower end, and the entire door operating device is arranged in arecess located beneath the door (Fig. 1). The solid cone engaged in 'the clutch element a which is formed as a hollow cone is connected with a gear wheel (I loosely mounted on the shaft 1) and meshing with a toothed sector e rotatably mounted about a pivot w. The sector is provided with a horizontally extending arm 1 having an arc shaped slot in which engages a crank pin f fixed to a worm wheel 9 driven by the motor 12. by means of a worm n. Upon the under side of the worm wheel 9 a disk 0 is secured thereto and this disk has formed in its periphery a recess a in which the curved or ben end of an arm p fixed to the element a of t e door engages when the door is closed. The motor 71, is of ordinary construction and is so arranged that it is in cmcuit when the latch of the lock in the door is lifted or open andout of circuit when the latch is closed. A resistance g serves to regulate the speed of the electric motor 71..

The operation is as follows: When the door latch is lifted or opened the electric circuit is closed and the electric motor becomes operative. The worm n driven by the :nrotor rotates the worm 'w'lieel g and its displaces the slotted arm in the direction indicated by the arrow (Fig. 3), its movement being transmitted to the shaft b through the toothed sector e, gear wheel (1 and the clutch c in such a manner that the,

door isppened and the curved end of the arm 39 is lifted out of the recess a in the dlsk 0. When the door has swung outward through 90 the crank pin f moves idly or moperatively for a certain distance in the slot of the arm 3 and during this time the door remains open (Fig. 4). If it should be desired to close the door immediately after it has been opened, the yielding clutch would permit of it, but the door could not be completely closed because-the inwardly displaced end of the arm ;0 fixed to the element e of the door bears against the periphery of the disk 0 and prevents the door from closlng, far enough to lock, until the operative elements have again approximately reached their initial positions 5) During the last part of movement of the operative elements the arm p comes into operation owing to the recess 2 coming opposite 1t whereby complete closing of the door by the mechanism is rendered possible, the latch breaking the circuit and the motor and the operative parts connected therewith being brought to rest. a

The arrangements described present the advantage that when the apparatus is operating normally the door remains open for a certain period, thereby facilitating the passage of bicycles, perambulators and the like, while in the second place the normal operation of the device cannot be disturbed.

What we claim and desire to secure by Letters Patent is 1. A device of the class described comprising a door, a motor for opening and closing the same, operating connections between the motor and door, means for holding said door. open a predetermined period of time comprising an arm fixed to the door and a cam shaped body secured to said operating connections and acting upon said arm when the door is closing but which prevents the complete closing of the door until the operating connections have returned to their initial door opening position, substantially as described.

'2. A device for opening and closing doors comprising an electric motor, a gear wheel driven thereby, a crank pin on said wheel,

a slotted member in which said crank pin- In testimony whereof we have affixed our engages, a toothed wheel rotated by said signatures in presence of two witnesses. slotted member and a. pivot for the door ARNO HOHNE rotated by said gear wheel, and a, cam disk 5 secured to said gear wheel and an arm se- HERMANN KRAKE' cured to the pivot at one end and engaging Witnesses:

against the cam disk at its other end, sub- RUDOLPH Fizicxn, stantially asset forth. o I Mom'rz SPEER.