Ventilating system fob school-booms
US 1194527 A
Description (OCR text may contain errors)
E. M. McNMVIARA.
VENIILATING SYSTEM FOR SCHOOL ROOMS.
APPLICATION FlLED APR- 5. 1915.
- Patented Aug. 15, 1916.
3 SHEETS-SHEET I.
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VENTILATlNG SYSTEM FOR SCHOOL ROOMS.
APPLICATION FILED APR. 5. 1915.
Patented Aug. 15, 1916.
E. M. MCNAMARA. VENTILATING SYSTEM FOR SCHOOL ROOMS.
APPLICATION FILED APR- 5. 19].).
Patented Aug. 15, 1916.
3 SHEETS-SHEET 3.
EDWARD M. IVIoNAll/IARA,
OF CHICAGO, ILLINOIS.
VENTILATING SYSTEM FOR SCHOOL-ROOMS.
Specification of Letters Patent.
lPat entcd Aug. t5. tutti.
Application filed April 5, 1915. Serial No. 19.104.
has for its principal object to provide a.
simple and eflicient structural formation and combination of the school desk and associated seat, in which the hollow pedestal of the desk constitutes an air duct or-passage providing a coacting element of the ventilating means, in addition to the usual function of a desk support, and is adapted by its constru'ction to provide means for local individual ventilation, with a direct passage for the exhaled'air to an opening of a discharge duct without commingling with the air exhaled by other pupils and therefore preventing a general vitiation of the air of the room.
In the accompanying drawings: Figure 1, is a perspective view illustrating the general arrangement of a ventilating system, of the plenum type, for school rooms, and with the present improvement arranged as a portion of the system. Fig. 2, is a longitudinal sectional elevation of a combined desk and seat embodying the present invention, and illustrating its adaptation to the indirect system of ventilation, in which separate supply and return ducts conduct the air to and from the school room. Fig. 3, is a detached perspective view of the foot rest or stool of the desk structure. Fig. 4, is a longitudinal sectional elevation, illustrating the adaptation of the present improvements to the plenum system of ventilating rooms, shown in Fig. 1. Fig. 5, is a detached perspective view of the vertical outer portion or board of the desk structure.
Similar reference numerals indicate like parts in the several views.
Referring to the drawings, 1 designates the desk body having the usual slanting top board or portion, and a vertical outer portion or board 2, which in the present improvement is provided midway its length with an individual air passage or duct 3. In the construction shown in Figs. 2, 4 and 5, said air duct or passage 3 comprises a vertical channel in the inner side of the outer portion or board 2, with a plate or sheet 4 of metal or the like, closing the open side of the channel so formed. The plate or sheet 4 having a horizontal extension at its lower end, to constitute the bottom or web 5 of the desk body 1, as shown in Figs. 2 and 4.
(i designates the lower or base member of the hollow pedestal upon which the desk body 1 is supported. Said base member 6 is formed with a lower expanded portion for fixed attachment to the floor, and preferably of the conical form shown, and is provided with a tubular vertical stem 7, that is externally screw-threaded, for the purpose hereinafter stated. The central duct or passage of said base member 6 has communication with a main duct of the ventilating system so as to either receive air therefrom, or conduct air thereto, in accordance with the particular system to which the present invention is applied. A series of openings 8 are formed in the conical wall of the base member 6 aforesaid. 9 designates a correspondingly formed and orificed register collar surrounding said base member, and adapted by a turning adjustment, to regulate communication through the series of openings 8, between the interior of the school room and the central duct or passage of the base member 6.
1O designates the upper member of the aforesaid pedestal, provided with a horizontal flange 11, for fixed attachment to the bottom or web 5 of the desk body 1. Tn the construction illustrated in Fig. 2, the vertically depending sleeve portion of said upper member 10 fits over the vertical tubular stem 7, of the base member 6 aforesaid, and is internally screw-threaded to engage the screw-threaded exterior of the stem 7, so that by a manual rotation of the upper member 10 and attached desk body 1, vertical adjustment of said parts in one direction or the other can be attained. The central duct or passage of said upper member 10 has communication at its lower end with the central duct or passage of the base member 6 aforesaid while its upper end has communication with the before described air duct or passage 3 of the vertical outer portion or board 2 of the desk body 1.
12 designates a sleeve section or extension associated with the lower end of the hollow pedestal aforesaid, adapted to partition the lower expanded portion of the interior of the pedestal into a central air chamber or duct which has longitudinal alinement with i the main duct or passage of the pedestal to constitute an; extension thereof, and into an annular chamber or duct 13, the walls of which contain the register openings 8, above described.
With the above described construction and association of parts, as illustrated in Fig. 2, the sleeve or partition 12, connects the duct or passage of the pedestal with an alr trunk or duct '14 beneath the school room floor,
while the aforesaid annular chamber or duct 13 has connection with a separate air trunk or duct 15, also benea'th'the school room floor, as shown. The construction is adapted for use inthat type of ventilating systems in which air is positively forced into, and positively withdrawn from the room by a combined pressure and exhaust apparatus. In an'exhaust system of ventilating in which the air is exhausted locally at or through the desks, the aforesaid sleeve section or ex tension 12 will be removed, and the lower end of each desk pedestal connected to com- .to offer a minimum amount mon exhaust main or air duct or trunk beneath the floor as illustrated in Figs. 1 and 4. 16 designates a clamp sleeve surrounding the vertically depending sleeve partion of the upper member 10 ofthe desk pedestal, and clamped thereon at any required vertical adjustment by a clamping screw'17. Said clamp sleeve 16 acts as a pivot base for the seat connection now to be described.
18 designates a connecting frame having an approximately U form, and comprising a pair of vertical members 19 and 20 connected together in spaced relation by a lower horizontal and extensible connecting member 21, as shown. At its upper end the vertical member 19 has a yoke extension adapted for pivoted connection at 22with the aforesaid clamp sleeve 16. Y The companion vertical member 20 is adapted for the attachment in an adjustable manner of the seat member of the desk, as hereinafter described in detail. The horizontal connecting member 21, aforesaid, is adapted to have close relation to the school room floor, and is preferably of.
a segmental form in cross-section, in order of obstruction to the feet of the pupil. 23 designates a foot rest or saddle, straddlingthe horizontal connecting member 21, and adapted to support the feet of the pupil a distance above the school room floor.
24 designates the pupils seat, associated in proper relation to the desk body 1 and having the usual hinged back 25. In the present construction the seat 24 has pivotal or hinge connection 26 with the tubular supportincg sleeve or standard now to be describe a 27 designates the tubular sleeve or standard above referred to, having an expanded upper end adapted to afford a substantial cal member 20 of the connecting frame 18,
in an adjustable manner, and in order to sult different slzes of pupils.
With the above described arrangement and pivotal connection of parts, the connecting frame 18, seat 24 and back 25, are adapted to swing from their normal position of use, illustrated in full lines in Fig. 2, and in dotted lines in Fig. 4, into a position clear of the school room floor, illustrated in full lines in Fig. 4, with the seat 24 closing the mouth of the cavity of the desk body 1, and with the back 25 resting above the top of said desk body.
In the construction illustrated in Fig. 2, the vertical member 20 aforesaid, is externally screw-threaded for engagement with the correspondingly screw-threaded bore of the tubular sleeve or standard 27 aforesaid, and with an internal screwthread for adjustable engagement with the stem portion of a floor-rest hereinafter described.
28 designates a lock sleeve or nut engaging the screw-threaded exterior of the vertical member 20 aforesaid, and disposed beneath the tubular sleeve or standard 27, to afford means for locking the parts at the required vertical adjustment.
29 designates the floor rest above referred to, and formed with a vertical screw-threaded stem 30 adapted to engage the screwthreaded bore of the aforesaid vertical member 20, and provide means for effecting an adjustment of the floor rest 29in accordance with the vertical adjustment of the connecting frame 18 aforesaid and the asso ciated desk parts with which it has connection.
In the construction illustrated in Fig. 4, the aforesaid vertical member 20, tubular sleeve or standard 27 and have a plain tubular form and telescope one within the other, as shown. Said parts are held to the required vertical adjustment by an expander cone or block 31, coacting with longitudinally slitted ends of the sleeve 27 and stem 30, as usual in expanding fastenings-of the present type.
The vertical adjustment of the desk pedestal may be attained by a detail construction floor rest stem 30, v
of parts differing from that heretofore dedesignates an intermediate sleeve having a smooth bore, the lower portion of which slidingly fits and is guidedupon the screwits contraction is effected to firmly hold the depending sleeve portion 35 of an up-.
per member 36 of the desk pedestal in proper fixed relation. Otherwise said member 36, is similar in formation to the upper member 10 of said pedestal heretofore described. 7
Having thus fully described my said invention, what I claim as new and desire to secure by Letters Patent, is
1. The combination, with an air trunk or duct; of a hollow pedestal located above the air trunk or duct and providing an air duct or passsage in communication therewith, and a desk-body surmounting the hollow pedestal and having an individual 'air duct or passage extending upwardly from the air duct or passage of the hollow pedestal to a point adjacent to the top of the desk body.
2. The combination, with air trunks or ducts; of a hollow pedestal having a lower or base member formed with a lower expanded portion in communication with one air trunk or duct and having a series of openings in the side walls thereof, and an orificed adjustable register collar surrounding the lower expanded portion of the lower or base member of the hollow pedestal, a
sleeve section or extension providing com-- munication between the other air trunk or duct and the air duct or passage of the hollow pedestal and a desk-body surmounting the hollow pedestal and having an individual air duct or passage extending upwardly from the air duct or passage of the hollow pedestal to a point adjacent to the top of the desk-body.
Signed at Chicago, Illinois this 1st day of April, 19-15.
EDWARD M. MCNAMARA.