Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS1370832 A
Publication typeGrant
Publication dateMar 8, 1921
Filing dateJul 9, 1920
Priority dateJan 29, 1919
Publication numberUS 1370832 A, US 1370832A, US-A-1370832, US1370832 A, US1370832A
InventorsMollberg Bror
Original AssigneeMollberg Bror
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Chair with ventilating device for theaters, biographs, and the like
US 1370832 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)


APPLICATION FILED JULY 9, i920- atented Mar. 8, 1921.





Specification of Letters Patent.

Patented Mar. 8, 1921.

Application filed July 9, 1920. Serial No. 395,012.

To all whom it may concern:

Be it known that I, Bnon MOLLBERG, a

subject of the King of Sweden, residing at ing is a specification.

In ventilating appliances for theaters, biographs, concert-halls or other closely occupied assembly rooms, air-drums have been provided below the chairs for supplying ventilating air or withdrawing foul air from the room, and air conduits located be tween the legs of the chairs have been connected with said drums, the sides of the conduits being grated to permit passage of the air. For the purpose of making the most advantageous use of the available space of the room, the chairs usually are'arranged as close together as possible and the seats of the chairs are mounted to permit the same to swing up when they are unoccupied. The space available for the mentioned air conduits is considerably limited and the air conduits being necessarily narrow cause the air currents to travel rapidly and hence produce undesired drafts.

The present invention has for its object to improve chairs of the kind mentioned, and the improvements not only remove said disadvantages but also permit the air to be regulated in a desired manner.

The invention consists in providing air conduits between the legs of the chairs, and these conduits are ta ered at their upper portions to provide t e necessary space to permit the chair seats to be swung. Each air conduit is also provided with a regulatin damper.

In the accompanying drawing, an embodiment of the invention is shown, in which:

Figure 1 is a front elevation partly in section of a row of chairs;

Fig. 2 a horizontal top view of the same in section;

Fig. 3 an end elevation of the same;

Fig. 4 a top view of another embodiment;

Fig. 5 a section of a detail; and

Fig. 6 a section of another detail.

Below the seats 1 of the chairs, air conduits 3 are provided between each pair of front and rear legs 2, each conduit 3 being provided with grates 4 and connected with air-drums arranged below the floor. In the conduit 3, a damper 5 is arranged and this damper 1s rlgldly mounted on a shaft 6, which extends to the exterior of the conduit and is provided with threads engaged by a nut 7 the end of the shaft being provided with a notch 8, as shown in Fig. 5.

Fig. 4 shows a horizontal section of an embodiment including a cylindrical air conduit B, and this conduit is also tapered upwardly, so that the seats 1 of the chairs may be freely swung vertically.

Folding chairs now in general use have, as before mentioned and shown in the drawing, seats 1 which may be swung up, whereby the rear portions of the seats swing downward. The conduit 3 must, therefore,

be narrow or tapered at its upper end, so that suflicie'nt space is provided to permit the seats to swing freely without the necessity of increasing the breadth of the side pieces of the chairs. The upward tapering of the air conduits 3 permits the use of conduits which are sufliciently wide through the greater portion of their height to convey comparatively great quantities of air.

The square section of each of the conduits 3 is of about the same size from the floor to the grates 4, but the section gradually decreases from this point upwardly, and as the air discharges through the grates at a point adjacent the wide section of the conduit, the speed of the air current will not be increased by reason of the air conduit being upwardly tapered.

In such ventilating devices for theaters, etc, as here referred to, on account of the different chairs being located various distances from the fan, it is necessary to regulate in a suitable way the air supply for each chair, so that the air supply becomes equal for all chairs. If not suitably regulated, the air will pass through the conduits 3, which are arranged nearest the fan and less air will discharge through the conduits which are. farther away from the fan. Such regulation is readily accomplished by means of the dampers 5. By applying a screw driver to the notch 8, the damper may be turned and by tightening the nut 7, the adjusted damper may be locked in its intended position for preventing any unauthorized person from altering the positionof the damper. By arranging the notch 8 parallel to the plane of the damper, the position of the latter will be indicated from the exterior of the conduit.

In order to facilitate attachment of the side plates 31 of the conduits 3, see Fig. (5, between the front and rear legs of the chair, the edges 32 of said plates are inserted in corresponding grooves in the legs of the chair.

What is claimed and desired to be secur by Letters-Patent is 1. In combination, a floor having an air duct arranged beneath the same, a series of alined chair legs arranged on said floor in spaced relation to one another, each chair leg consisting of front and rear members spaced apart, an air conduit arranged between the front and rear members of each chair leg and having its side walls tapered upwardly, the tapered portions of said walls being perforated to'permit the exit of air laterally from the chair legs, and pivotally mounted seats located between said legs and having portions movable between the tapered portions of said air conduits.

2. A chair including a vertically swinging seat, legs supporting said seat and provided with air conduits, the upper portions of said legs being perforated and upwardly tapered to permit swinging of the chair seat between the upper portions of the conduits, dampers arranged in said conduits, a rod secured to each damper and extending through the chair legs, one of the outer ends of each rod being notched and screw-threaded,'and a nut engaging-the threads of each rod for locking the dampers in adjusting position.

In testimony whereof I have afiixed my signature.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2623448 *Aug 9, 1949Dec 30, 1952Algernon Runefelt Victor ElisDevice for adjustably supplying air to auditoriums and the like
US2852998 *Apr 5, 1955Sep 23, 1958Serra Jose LlobetSystem for diffusion of air in show halls for ventilation and air conditioning purposes
US3628829 *Jul 8, 1969Dec 21, 1971Heilig Morton LExperience theater
US6629724Jan 5, 2001Oct 7, 2003Johnson Controls Technology CompanyVentilated seat
US6786541Jan 5, 2001Sep 7, 2004Johnson Controls Technology CompanyAir distribution system for ventilated seat
US6857697Jun 17, 2003Feb 22, 2005W.E.T. Automotive Systems AgAutomotive vehicle seating comfort system
US6893086May 9, 2003May 17, 2005W.E.T. Automotive Systems Ltd.Automotive vehicle seat insert
US7040710Jan 5, 2001May 9, 2006Johnson Controls Technology CompanyVentilated seat
US7052091Jan 26, 2005May 30, 2006W.E.T. Automotive Systems Ltd.Automotive vehicle seat insert
US7083227Mar 10, 2005Aug 1, 2006W.E.T. Automotive Systems, AgAutomotive vehicle seating comfort system
US7108319Jul 27, 2002Sep 19, 2006Johnson Controls GmbhAir conditioned cushion part for a vehicle seat
US7131689Jul 21, 2005Nov 7, 2006W.E.T. Automotive Systems, AgAutomotive vehicle seating comfort system
US7197801Feb 17, 2006Apr 3, 2007W.E.T. Automotive Systems Ltd.Automotive vehicle seat insert
US7201441Dec 17, 2003Apr 10, 2007W.E.T. Automotive Systems, AgAir conditioned seat and air conditioning apparatus for a ventilated seat
US7213876Nov 28, 2005May 8, 2007W.E.T. Automotive System AgVehicle seat and associated air conditioning apparatus
US7229129Oct 26, 2005Jun 12, 2007Johnson Controls Technology CompanyVentilated seat
US7261371Dec 10, 2002Aug 28, 2007Johnson Controls GmbhVentilation system for an upholstery part
US7274007Sep 21, 2004Sep 25, 2007W.E.T. Automotive Systems Ltd.Control system for operating automotive vehicle components
US7338117Apr 12, 2004Mar 4, 2008W.E.T. Automotive System, Ltd.Ventilated seat
US7356912Apr 12, 2004Apr 15, 2008W.E.T. Automotive Systems, Ltd.Method for ventilating a seat
US7370911Oct 15, 2004May 13, 2008W.E.T. Automotive Systems, AgAutomotive vehicle seat insert
US7425034Oct 15, 2004Sep 16, 2008W.E.T. Automotive Systems AgAutomotive vehicle seat having a comfort system
US7461892Dec 1, 2004Dec 9, 2008W.E.T. Automotive Systems, A.C.Valve layer for a seat
US7467823Apr 7, 2004Dec 23, 2008Johnson Controls GmbhVehicle seat
US7475938Apr 6, 2007Jan 13, 2009W.E.T. Automotive Systems AgAir conditioned seat and air conditioning apparatus for a ventilated seat
US7478869Aug 16, 2006Jan 20, 2009W.E.T. Automotive Systems, AgAutomotive vehicle seat insert
US7506938Aug 31, 2006Mar 24, 2009W.E.T. Automotive Systems, A.G.Automotive vehicle seating comfort system
US7578552Oct 31, 2007Aug 25, 2009W.E.T. Automotive Systems AgAutomotive vehicle seat having a comfort system
US7588288Apr 14, 2008Sep 15, 2009W.E.T. Automotive Systems AgAutomotive vehicle seat insert
US7618089Apr 18, 2006Nov 17, 2009W.E.T. Automotive Systems AgAir conditioning system for a seat
US7637573Jan 17, 2007Dec 29, 2009W.E.T. Automotive Systems AgAutomotive vehicle seating insert
US7735932Jan 15, 2009Jun 15, 2010W.E.T. Automotive Systems AgAutomotive vehicle seat insert
US7781704Aug 21, 2007Aug 24, 2010W.E.T. Automotive Systems AgControl system for operating automotive vehicle components
US7918498Nov 6, 2008Apr 5, 2011W.E.T. Automotive Systems AgValve layer for a seat
US7971931Aug 16, 2010Jul 5, 2011W.E.T. Automotive Systems AgAutomotive vehicle seat insert
US8162391Jun 29, 2011Apr 24, 2012W.E.T. Automotive Systems AgAutomotive vehicle seat insert
US8235462Mar 30, 2011Aug 7, 2012W.E.T. Automotive Systems, Ltd.Valve layer for a seat
US8309892Aug 23, 2010Nov 13, 2012W.E.T. Automotive System, LtdControl system for operating automotive vehicle components
US8360517Mar 28, 2012Jan 29, 2013W.E.T. Automotive Systems, Ag.Automotive vehicle seat insert
US8777320Dec 21, 2009Jul 15, 2014W.E.T. Automotive Systems AgVentilation system
U.S. Classification454/322, 297/180.13
International ClassificationA47C7/74
Cooperative ClassificationA47C7/74
European ClassificationA47C7/74