US2092509A

US2092509A - Telephone booth

Info

Publication number: US2092509A
Application number: US35410A
Authority: US
Inventors: Leon N Hampton; Albert K Smith
Original assignee: Bell Telephone Laboratories Inc
Current assignee: AT&T Corp
Priority date: 1935-08-09
Filing date: 1935-08-09
Publication date: 1937-09-07
Anticipated expiration: 1954-09-07

Description

P 1937. N. HAMPTON ET AL 2,092,509

TELEPHONE BOOTH Filed Aug. 9, 1935 3 Sheets-Sheet 1 FIG.

L. /V. HAMPTON AKSM/ Th 3 9l(ac% A [TOR KEY {NVENTORS P 1937. L. N. HAMPTON ET AL 2,092,509

. TELEPHONE BOOTH Filed Aug. 9, 1935 5 Sheets-Sheet 2 P2 FIG-2 17 INVENTORS: y gg flff T ON A TORNE Y Patented Sept. 7, 1937 UNITED STATES PATENT OFFICE K. Smith, West Orange, N. 1. Bell Telephone Laboratories,

, assignors to Incorporated,

NewYork, N. 2., a corporation of New York Application August 9, 1935, Serial No. 35,410 3 Claims. (CL 98--33) This invention relates to telephone booths and more specifically to a power ventilating system for use in such a booth.

Heretofore attemptshave been made to ventilate telephone booths by mounting an ordinary fan on a wall in the interior of the booth for stirring the normally static air in the booth or by mounting the fan in a manner to generate a current of air exhausting in a conduit-like opening in the space between the ceiling and the roof of the booth, the airentering the booth from the .space around the door and its supporting frame and an opening between the base of the booth and the lower edge of thedoor.

Ventilating systems of this type have been found ineiiicient owing to the air resistance atforded by such necessarily limited inlet paths and the fact that too great atpercentage of the air entered the booth from points too high with respect to the general location of the telephone apparatus as to be effective for ventilating purposes. Such ventilating systems have been found to require a fan capable of. circulating a great volume of air with the consequent waste of power and objectionable noises generated by the vibration of a necessarily high powered motor for actuating the 'fan wheel. Furthermore, in ventilating systems where the air is' permitted to enter the booth from the space between the bottom of the door and the floor for ventilating purposes, the applicants discovered that the occupant was supplied with vitiated air including such heavier gases, such as CO: and CO that may be in the proximity of the booth.

The object of this invention is to provide an improved ventilating system for telephone booths,

ghich is free from the above-mentioned objecons.

According to this invention the ceiling of the booth is provided with openings for mounting a fan and a lighting fixture, the latter having aper-' tured plates forming a path for exhausting the air from the booth in cooperation with another exhausting air path formed at the bottom of the door and the booth base, thus avoiding the drawing of vitiated air of the order above-mentioned in the booth. Means isprovided whereby the supporting elements of the fan may be attached to adjacent vertically disposed walls of the booth or to the ceiling while permitting the orientation or adjustment of the fan wheel with respect to the ceiling of the booth, such supporting elements being so constructed as to eflectively prevent the vibrations of the motor from reaching the talking compartment of the booth while due to the comparatively small diameter of its fan wheel and of the door and manually through the operation I of a switch disposed in a convenient position in the booth.

Other features and advantages of the invention will appear from the following description and by the claims appended thereto, reference being had to the accompanying drawings in which,

Fig. l is a perspective view of a telephone booth embodying the features of the invention, shown with portions of the front wall and door cut away;

Fig. 2 is a partial view of the booth showing Q elements of the booth and fan assembly in sec- Fig. 3 is a top view of Fig. 2; d

Fig. 4 is a partial view of the booth shown in section; and 7 Fig. 5 is a partial view of the motor support shown partly in section.

The telephone booth in which the present invention is particularly well adapted for use generally consists of a plurality of walls l0, ll, l2, and IS, a base It, va ceiling I5 and a roof Ii shown in Figs. 1-, 2, 3, and 4.

The front wall [3 is provided with an opening- I! and to this wall is hinged a folding door it, the door when closed cooperating with the base It to form an opening for the exhaust of the air in thedirection indicated by the arrow in Fig. 1 under a condition that will be hereinafter described in detail. a

The ceiling l 5 and the roof it are provided with registering penings l9 and 10 and in centered relation with these openings .is'mounted a fanconsisting of a motor 2|, a fan wheel 22 and a tubular supporting arm 23 which is screw-threaded at its periphery for engagement with a similarly threaded flange or base member 24 bolted -to a partition 25 serving to divide the element 26 secured to the motor casing and engaging its complementary hinge portion 21 formed at the end of arm 23, and a pivot 28 engaging the hinge element 21 of the arm 23 permits the vertical adjustment of motor 2| and the fan wheel 22 carried thereby with respect to the plane of ceiling I5, the lateral adjustment of the motor and the fan wheel with respect to the ceiling opening [9 being eiiected by the screw adjustment of the arm 23 in the base 24 and secured in such adjusted position by a lock nut 30.

The base member 23 is held to the partition 25 by-bolts 3| and 32 fitted with

rubber bushings

33 and 34 and a pad 35 placed between the base 24 and the partition 25, these rubber elements being provided for preventing the vibration of the motor reaching the talking compartment of the booth and an insulating bushing 36 inserted in the tubular support 23 is provided for insulating the wires W of the motor circuit from this supporting arm.

On the ceiling l5 and in centered relation withthe axis of motor 2'! is mounted on a series of brackets 31 a truncated cone-shaped plate 38 and a cone member 39 whichis supported in superposed relation to plate 38 by brackets 30 shown in Figs. 2, 3, and 4, these cone elements being provided to prevent the extraneous light reaching the interior of the booth from the opening 20 in the roof E6, the space between the blades of fan wheel 22 and the opening IS in ceiling i5.

On the top side of roof I6 is securely mounted a metallic screen 4| having a centrally disposed opening fitting over the apex portion of the cone member 39, and on the casing of motor 2! is mounted as on radial arms 43 and ring 43R a screen cage 42 completely enclosing the fan wheel 22, and a ring which is held to the underside of ceiling i5 by bolts 44 is providedto obstruct from view the clearance between the periphery I of screen cage 42 and the opening I 9 in ceiling I5,

. tail.

thus adding to the aesthetic appearance of the booth.

In an opening OP in the central portion of the ceiling I5 in compartment X2 shown in Figs; 2'

to the terminal of the lamp, the lamp and the motor 2| being thus controlled through the operation of a commonswitching device not shown enclosed i the housing and operated in a manner that will be hereinafter described inde- The switching device in housing 55 may be of any ordinary type and is provided with an operating camming arm shown in Figs. 2 and 3 disposed in operative .relation with an arm Bl extending laterally from avertically disposed spindle 62 carried by the door section I 8 of the booth at a point adjacent its upper disposed e, the arm 6| having at its free end a block 63 of anti-friction material bearing .on the cam ming arm 60 for actuating it upon the movement in F1 .-1 is provided for controlling the operation of motor 2| independently oflthe movement of the booth door and to the side wall II and real cuit of motor 2 l.

wall I2 is secured a shelf 57 provided for mounting the telephone apparatus TA in the form of a coin collector box and on the base M of the booth is mounted an upright support on which the chair 58 is fitted for pivotal movement.

In the operation of the booth embodying the features of the invention the closure of the booth door is effective to move the arm Si in the direction indicated by the arrow in Fig. 3 for operating the switch arm 60 and thereby closing the cir- The movement of fan wheel 22 is effective to draw the air into the booth through the screen M at the top of the booth, the space'between the

light deflector plates

33 and 39 through the screen cage 42 and the opening in plate 33, such air path being indicated by the arrows in Figs. 2 and 4.

The air is exhausted from the interior of the booth mainly through the opening formed .be-

tween the lower end of the booth door and the base M and partly through the, lighting fixture openingsOP in the ceiling l5 and from the compartment X2 through the openings 0P2 in louver plate BP on theupper side of roof l6 as the side wall II of the booth as shown in Fig. 1.

In telephone booths equipped with the ventilating system of the invention the noise due to the vibration of the motor' and the air flow under the action of the fan wheel has been found to be I substantially entirely eliminated and thereby greatly improving telephone conversation, while the special combination of the cone elements for the fan efiectively prevents the extraneous light reaching the interior of the booth without aiiecting the efiiciency of the fan in the ventilating of the booth. According to the invention it is to be noted that the air-paths are of very large cross-sectional areas and each of a minimum length, thus permitting the use of a small and slow-operating motor to obtain maximum ventilation efliciency and the substantially complete attenuation of noise consequent to the use of a high-powered motor. Moreover, according to applicants construction the louver ,plate BP may be placed at the greatest distance from the air-inlet opening 20 in the roof without increasing the air-paths toward or away from the interior of the both, in order to prevent the exhausted air mixing with the inlet air under the action of the fan wheel.

What is claimed is:

1. A telephone booth having a plurality of walls, a base for securing said walls in assembled relation at their lower ends, a ceiling for securing said walls in assembled relation at their upper ends, a roof supported by said walls, an opening'in said ceiling and said roof, a fan wheel, a

motor for actuating said ian wheel, and a support for said motor adjustable for positioning said fan wheel in centered relation with the opening in said ceiling and a plurality of cone-shaped baflie plates mounted on the ceiling in superposed relation with-respect to each other and con-- centric to said motor.

2..A telephone booth having a plurality of walls, one of said walls having a door opening, a door for said opening, a floor, a roof and a ceiling each having a plurality of air openings,

- a partition disposed across said booth dividing the spocebetweenssidceilinsnndsnidroolintotwo compartments, s i'en mounted inone of said computmentsiordrnwingsirinthehoothimm oneotsaidslropeninzsinssidrootsndinsnid -'iioortoiormnseconda.irexhs.ustpnthlorthe ventilationoithehootmnndnpiunlityotconeshnpedbeilieplstesmounte'd'cntheceiiinsin' the first-mentioned computmentin superpoled selntiontoenchothetnnd'eoneentrlctosfld motornndsnidfsnwheel.

3.Inntelephonehooth,ineanhinntionwith s plunlityotwnllgohnseneeilin nndsrool supportedbythevnluoisputitiondisposedst enmiewithrespecttoonumhesolvollsinthe spscebotweentheceilinzandthemoitoiorm two compartments, openings in the ceiling and theroolinoneotssidcompnrtmentstoserveas snsis-inletpstmssupportsecm'edtosaidputb tion.smotormountedonssidsupport,ntan wheel actuated by said motor and disposed for movement in concentric relation with the openinginthe ceiling, n :unrdelement for said wheel disposedintheopeningintheceilinmnplw nlity oi cone-shaped heme plates mounted on the ceiling in superposed relstion to each other, and concentric to said motor for preventing the extraneous lisht renching the interior of the booth. the apex of one of sold m plates protmdinssbovethe rooLsnopenincinthe ceiling sndthexooiin theothereompsrtmentservlnz ss on sir-exhaust pnth lor the ventilation of the ,hoothnndslouverplateoverthelnst-mentioned openlnsintheroot. LION E'HAMP'NN. ALBIRTK. SUITE.