US4947A - Apparatus for closing doors - Google Patents

Apparatus for closing doors Download PDF

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Publication number
US4947A
US4947A US4947DA US4947A US 4947 A US4947 A US 4947A US 4947D A US4947D A US 4947DA US 4947 A US4947 A US 4947A
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Prior art keywords
lever
door
closing doors
joint
weight
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Expired - Lifetime
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    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F1/00—Closers or openers for wings, not otherwise provided for in this subclass
    • E05F1/02—Closers or openers for wings, not otherwise provided for in this subclass gravity-actuated, e.g. by use of counterweights
    • E05F1/025—Closers or openers for wings, not otherwise provided for in this subclass gravity-actuated, e.g. by use of counterweights with rectilinearly-moving counterweights

Definitions

  • a small abutment piece (un) of cast iron or other suitable material is afiixed to the face of the door casing on the same side with the hinges and a little behind their line, as is clearly shown in the drawing; this abutment has two projections on it one above the other with a round pin extending from one to the other that serves as a fulcrum to one end of the lever (b) which is forked so as to embrace the pin and turn on it as the door moves on its hinges.
  • the lever (b) meets the other lever (e) with a rule joint at its junction with the arm (c) (lever (o) being only half the length of lever (e) and arm c combined) and they are so constructed as to always retain this center joint above the line of the two end ones, the lever (e) abuts against a small piece (d) that is secured to the door and forms the fulcrum joint of lever (c) and allows it a vertical motion, as is clearly demonstrated in the drawing.
  • the lever (c) extends beyond the center joint and a little above it nearly out ⁇ as far as the jamb of the door and has there a weight (c) suspended on it.

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  • Wing Frames And Configurations (AREA)

Description

UNITED STATES PATENT OFFICE.
DANIEL BALL, OF ALBANY, NEW YORK.
APPARATUS EOR CLOSING DOORS.
Specification ofLetters Patent No. 4,947, dated February 1, 1847.
To all whom t may concern Be it known that I, DANmL BALL, of Albany, in the county of Albany and State of New York have invented a new and Improved Apparatus for Closing Doors, and that the following is a full, clear, and exact description of the principle or character which distinguishes it from all other things before known, and of the manner of making, constructing, and using the same, reference being had to the accompanying drawings, making part of this specification, in which- Figure l is a view of the apparatus attached to the door.
The nature of my improvement consists in applying the compound lever or knee-joint to doors so as to close them by a weight, without the interposition of a spring or chain, which are so liable to be deranged.
The construction is as follows: A small abutment piece (un) of cast iron or other suitable material is afiixed to the face of the door casing on the same side with the hinges and a little behind their line, as is clearly shown in the drawing; this abutment has two projections on it one above the other with a round pin extending from one to the other that serves as a fulcrum to one end of the lever (b) which is forked so as to embrace the pin and turn on it as the door moves on its hinges. The lever (b) meets the other lever (e) with a rule joint at its junction with the arm (c) (lever (o) being only half the length of lever (e) and arm c combined) and they are so constructed as to always retain this center joint above the line of the two end ones, the lever (e) abuts against a small piece (d) that is secured to the door and forms the fulcrum joint of lever (c) and allows it a vertical motion, as is clearly demonstrated in the drawing. The lever (c) extends beyond the center joint and a little above it nearly out `as far as the jamb of the door and has there a weight (c) suspended on it. By this arrangement it will be perceived that as the door is opened the compound lever is bent up and the weight raised and that in descending it closes the door. It
is obvious that this same lever can be attached above a door and be made to act on a rack and segment wheel, but I should deem that only a modification of` my invention.
What I claim as my invention, and desire to secure by Letters Patent, is-
The combination of the compound lever and weight with a door for closing the same, substantially in the manner and for the purpose set forth, without interposing a chain or other flexible l'ixture.
DANIEL BALL.
In presence of- R. J. HILTON, HooPER C. VAN VoRsT.
US4947D Apparatus for closing doors Expired - Lifetime US4947A (en)

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US4947A true US4947A (en) 1847-02-01

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030040777A1 (en) * 1996-01-08 2003-02-27 Itzik Shemer Modulation of intracellular calcium concentration using non-excitatory electrical signals applied to the tissue
US20040117896A1 (en) * 2002-10-04 2004-06-24 Madey Steven M. Load diversion method and apparatus for head protective devices

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030040777A1 (en) * 1996-01-08 2003-02-27 Itzik Shemer Modulation of intracellular calcium concentration using non-excitatory electrical signals applied to the tissue
US20070239216A9 (en) * 1996-01-08 2007-10-11 Itzik Shemer Modulation of intracellular calcium concentration using non-excitatory electrical signals applied to the tissue
US20040117896A1 (en) * 2002-10-04 2004-06-24 Madey Steven M. Load diversion method and apparatus for head protective devices

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