US2210745A - Television receiver - Google Patents

Description

A. ZILLGER TELEVISION RECEIVER Aug. '6, 1940.

1954 2 Sheets-Sheet l Original Flled Nov. ,248,

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ATTORNEYS Patented Aug. 6, 1940 PATENT OFFICE TELEVISION RECEIVER Arno Zillger, Narberth, Pa., assignor to National Television Corporation, corporation of Delaware Wilmington, Del., a

Application November 28, 1934, Serial No. 755,113'

Renewed December 19, 1939 5 claims. (c1. 17a-7.3)

'I'his invention relates to television receivers and particularly to a receiver embodying the scanning apparatus shown and described in my application entitled Television system, Serial No. 626,579, filed July 30,` 1932.v

One object of the inventionisl to provide a television receiver which is compact and in which all of the parts are easily accessible.

' Another object of theinvention is to provide a television receiver in which the amplifier and light source of the apparatus form one unit which is entirely independent of the 4moving scanning element. y

Another object of the invention is to provide a television receiver in Vwhich the light source may be mounted in the radio receiver.

Another object of the invention is to provide an adjustable mounting for the television light source so that the picture may be straightened by adjusting the source.

Another object of the invention is to provide a television receiverwith a large'angle of view.

Other objects ofv the invention and objects relating particularly to the novel assembly of the various parts will ber apparent as the description proceeds.

. The invention is illustrated in the accompanying drawings in which:

Fig..1 is a front elevational view of my improved receiver; n

Fig. 2 is a sectional plan view taken on the 4line 2-2.ofFig. 1; ."r'

Fig. 3 is a sectional side'elevational view of the receiver taken on the line 3-3 of Fig. 2;

Fig. 4 is a sectional side elevational view through the end of the receiver unit taken on the line 4--4 of Fig. 2 and showingthe lamp an mounting therefor.; `and Fig. 5 is a sectional elevational view of a portion of lthe lampconnecting means `taken on theline 5--5 `oi Fig. 3.

In 1 is shown a cabinet' Il! having a base I I anda top I2. The cabinet is substantially rec-- tangular lin shape but has a curved corner` I3 in which is provided an opening I4 through which the observerr looks to View the picture. The opening I4 may be provided with a suitable transparent window lzwhich may be made of glass or other transparent material and which may-be held securely in `place by the rclips I6 onthe in-` side of the 'cabinet wall. Inside of the cabinet are positioned two units: the scanning unit I-'I and the receiving unit I8, the former on the left hand'nside Qi thecabinet behindwthewindow I5 and the latter substantially filling the right hand side of the. cabinet. f

The scanning element comprises a motor I9 which may be of the synchronous type, if desired, -or any othertype -provided with a s ynchronizing device, such as a phonic Wheel, in order tozinsure a speed synchronous to that of the transmitting system. The motor may be mounted' on suitable shock-absorbing feet .20 which 'in turn may be screwed on to the base I I to secure the motor in position. Upon the motor shaft 2| is mounted a scanning drum 22 which.

may besimilar to -that shown andfdescribed in my above mentioned application or in my patent entitled Scanning drum construction, -No. 2,112,390, granted March 29, 1938.

In the latter Vapplication a plurality of plate 23' are mounted upon a sleeve with supporting discs 23 and 25 `at each end thereof. rThe plates are triangular in the construction shown with onel edge of each a reiiecting'surface, and the refleeting surfaces are arranged in a helix around the drum at spaced angular intervals. This scan'- ning drum is secured on the motor shaft 2I by the nut '26,Qand' a" suitable guard 2'I is positioned" around the drum 'to 'prevent any one touching the drum from lthe rear While it is in motion.

The vertical position ofthe drum is such that it comes directly'in back of vthe window I5 so that it may be `seen by an observer looking through the window Afrom in frontr or from the side of the receiver. i

The receiver unit I8 may comprise any type of radio receiver suitable for receiving a television signal `as for instance a superheterodyne receiver having a 'plurality of tubes 30 which I may mount in a horizontal position as indicated anda plurality of variable condensers 3l which I may mount on a vertical shaft 32. A'wheel 33 also mounted onv the condenser vshaft 32 may be ar-V ranged-to align with an opening'SII in the front side of the cabinet I0 so that a portionof it protrudes through the ,front wall of the cabinet for manual rrotation by the operator. The wheel is preferably knurled or serrated on its circumference to'facilitate `turning by` hand and 'is large enough indiameter so that thereceiving set may be readily tuned by rotating the wheel. I prefer'to mount all of the power supply parts atv the reary of thev unitwhere they may be enclosed in a suitable shielding-box 35. The transformer 36 -is shown mounted on top and the'rectier tube 31 is shown at the left with the power o-utput tube 38 adjacent to it. 1 f v A switch 39 is positioned on the front of the receiver and aligns with an opening in the front wall of the receiver so that it protrudes through the wall and may be operated from the front of the receiver. The switch 39 may control the rnc-tor I9 as well as the power supply for the receiver I8.

Just 'above the wheel 33 I may provide a second wheel 4l which `aligns with andprotrudes through an opening 42 in the front of the cabinet.' This Wheel 4I may be for the purpose of 'controlling desired inclination.

the volume of the signal received and may be mounted on the shaft 42a of a suitable variomswitch may be operated by the shaft 42a in the.'

same manner that the current supply switch is mounted on the volume control shaft,iny fa radio v receiver and may have one terminal connected to ground on the chassis'land-'ftheother 'connected to a wire 44a. which leads-to the bottom socketv of the lamp to be hereinafter described.

- -At the left hand side of the receiver as viewed in' Figs. 1 and 2 I provide a compartment -46 -to hold the lamp 41 and a mirror 48 for-directing the rays of the lamp towards. thedr'um. 'The compartment has a rectangular cross-section with a length approximately that 'of thefront to rear length of the receiver. The lamp is positioned at the rear of this compartment-in a substantially 4vertical position while the mirror 48 is positioned at the forward end and is rvparallel' to the axis of the lamp and arranged at such an angle as to throw the rays of the lamp towards the drum 22 through a suitablebpening 4B' in the -wall of the compartment 46. "The mirror 48 may be mounted on 'a suitable bracket 5l)V which is pivoted Yati 5I and is provided with an arcuate slot 52 and a cooperating screw v53 'so that the angle of the mirror may be radjusted tov give the proper illumination ofthe'drurn. The lampf41 may be made similar to the-construction shown and described in theapplication gustv 11, 1932, entitled Television'lamp andapparatus. `Such a lamp comprises a' transparent tubular portion 54, from which the light issues to the drum, and enlargedbulbs`..55 and 56 at each endthereof. .The lower bulb 56 is provided with a screw base .51 with the central terminal 58 similar to the screw base of .an-electric light bulb and connected to thev electrode59 Within the bulb. The outer terminal 60 is shown connected to a shield 6l which partly surrounds the tubular member 41 and ,may'in-the present instance be formed integralztherewith as'by be'- ing cemented to the glass.` 'I'hex'terminall 58 makes contact with a terminal 62 in the socket 63, which is connected to the output of thereceiver,-while the threaded sleeve 641in the'socket may be connected -to the switch 43a ontthe receiver by the wire 44a sothat this terminal may be connected to ground on the chassiswhen'the switch-is closed.- j l The upper end of the lamp terminating in the bulb is alsoprovided with a cap 65'Wliich `may fitv into a smooth-walledsocket 66 which is'preferably arranged to resiliently an'dfrictionally grip the cap 65 so as to make'good contact therewith. I may mount the socket"'66 upon an insulating block 61 which is in turn supportedr upon a cover plate68`which coverslth'e top of this end of the compartmentv 463151'The cover plate 68 may extend down on theVSideS Of lthe beneath the cover plate 68.

, as' much as possible.

compartment to be secured in place by screws 69 and it may have a flange 10 extending downwardly inside of the compartment to cover or shield the upper bulb 55 so that it will not interfere with the operation of the scanning drum. Thus light which may be produced by the bulb 55 isA prevented from reaching the drum.

The socket '63 is preferably mounted on a soft rubber base 1I` so'that it will be free 'to tilt in any direction to permit setting the lamp at a The socket 66 is also resiliently mounted with respect to the block 61 which is movable on the cover plate 68. In order to provide for movement of the block 61 I may provide holes 12 in the cover plate 68 through which may pass machine screws 13 which may be screwed into tapped holes in a ring 14 placed The socket and block 61 may be shifted from side to side and then locked in position by tightening the screws 13 when the proper inclination is found.

Fromthe above it will be seen that I have provided a ,television receiver which iscompact and simple to construct and operate and in which there are two separate parts:` the motor and drum,I which forms one unit, and the receiver withv the light source included, which forms the other unit. As the light source is mounted close to the amplier there is a minimum of connecting leads and all of the connections may be coveredY and suitably shielded. The receiver may be readily. tunedby means of the two discs 33 and 4l the former selecting the wave length and the latter controlling the volume of the signal. Inasmuch as the motor fits at a definite position in the cabinet andthe light source is fixed in thereceiving unit the adjustment of the light source lwith respect to the drum need Inot be changed 'when it is 'once determined and the receiving set may be removed from 4the cabinet tochange` tubesfor instance, without interfering with this adjustment. The cabinet may be provided, with a suitable back 15 which may have a series of openings thereinl toy provide ventilation so thatthe various tubes will not become overheated.

vInasmuch as the drum and motor is positioned inthe cabinet spaced from the viewing window llll a great dea l of the outside lightis prevented from :striking the drum and this is augmented by the decorative ribs 1 6 which lare positioned above and below the4 window'a'nd which may be painted black if desired to eliminatevreiiection This makes itpossible to use the receiver in broad daylight in a brightly lighted room but it is necessary to prevent direct lighty from striking the drum, as, for instance, from va tablelamp. v v

While the window for viewing the television picture has been shown on the corner of the cabinet the invention is not to be limited to such a construction as the window'l and'drum might be positioned at the center with the parts of the receivingI unit distributed on each 'side of the drum. Owingfto the nature of the helical drum it ispossible to see a picture from various positions around the drum through a very wide angle. Hence if the window is at the center it may be considerably Wider so as to give the same angle of View as where itis positioned at the corner. v i" A curved glass has also been shown for the window but it will be evident that a flat ,glass may be used for this purpose, or the glass may be entirely eliminated, if desired, although it is recommended vfor keeping dust away from lthe mirror drum and for preventing any one from y touching the drum while it is in motion. v

Many modications of the invention may be resorted to without departing from the spirit' 1. A television receiver comprising a radio re-` ceiving set, a compartment at one end of said set, a light source Within said compartment and comprising a pair of spaced apart electrodes in an atmosphere of ionizable gas and separated.

by a relatively long small diameter tubular member to restrict the discharge to a line of light, said v electrodes being connected to the output of said radio receiver, means to adjust the inclination vof said light source, and a reflector adjustably positioned substantially parallel to said line of light to direct the rays therefrom outwardly through an opening in said compartment.

2. A television receiver comprising a radio receiver having a compartment at one en d thereof, a tubular light source Within said compartment, means to adjust the inclination of said light source, said light source being connected to the output of said radio receiver, a conducting member in close proximity to said ltubular member and extending substantially the length thereof, switching means to connect said conductor to ground, and a reflector positioned within said compartment and adapted to direct the light from said source outwardly through an opening in said compartment.

3. A television receiver comprising a cabinet, a

helical mirror drum rotatably mounted Within said cabinet, a Window in said cabinet so arranged that said drum may be robserved from outside of said cabinet, a radio receiving unit within said cabinet, said unit having a compartment at one rend thereof nearest tosaid drum, a tubular light source within said compartment and mounted substantially parallel to said drum, means to adjust the inclination of said light source, said light source being connected tothe output of said radio receiver, means to direct the light from said source through an opening in said compartment to said drum, a conductor positioned in close proximity to said light source and extending substantially the length thereof, and switching means to connect said conductor to ground.

fi. A television receiver comprising a cabinet, a window in said cabinet, a helical mirror drum positioned within said cabinet behind said window, a radio receiving unit positioned Within said cabinet, a compartment in the end of said unit nearest to said drum, a tubular light source Within said compartment and mounted substantially parallelto the axis of said drum, means to adjust the inclination of said. light source, said light source being connected to the output of said radio receiver, means to control the volume of the output of said receiver, a conductor positioned in vclose proximity to said tubular light source and extending substantially the length thereof, and switching means associated with said volume control to connect said conductor to ground when f said volume control is turned down.

`5. A television receiver comprising a radio receiving set, a compartment at one end of said set, a light source within said compartment and comprising a pair of spaced-apart electrodes in an atmosphere of ionizable gas and separated'by a relatively small diameter tubular member to restrict the discharge to a line of light, said electrodes beingconnected to the output of said radio. receiver, means to adjust the inclination of said light source, a reflector adjustably positioned substantially parallel to said line of light to direct the rays therefrom outwardly through an opening in said compartment, a scanning device mounted outside of said receiving set and positioned so as to receive light rays passing outwardly through the opening in said compartment, said'scanning device comprising a pluralityl of longvnarrow refleeting surfaces arranged side by side in a helix rate of speed.

ARNO ZILLGrER.v

around an axis and having equal angular spacing

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