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Publication numberUS2589627 A
Publication typeGrant
Publication dateMar 18, 1952
Filing dateJun 10, 1950
Priority dateJun 10, 1950
Publication numberUS 2589627 A, US 2589627A, US-A-2589627, US2589627 A, US2589627A
InventorsPolley Eugene J
Original AssigneeZenith Radio Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Linkage system for a wave-signal receiver of the tilt-out type
US 2589627 A
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Description  (OCR text may contain errors)

March 1952 E. J. POLLEY LINKAGE SYSTEM FOR A WAVE-SIGNAL RECEIVER OF THE TILT-OUT TYPE Filed June 10, 1950 EUGENE J. POLLEY INVENTOR.

/-//s ATTOR/VE Patented Mar. 18, 1952 LINKAGE SYSTEM FOR A WAVE-SIGNAL RECEIVER OF THE TILT- OUT TYPE Eugene J. Policy, Berwyn, Ill., assignor to Zenith Radio Corporation, a corporation of Illinois Application June 10, 1950, Serial No. 167,475

7 Claims.

This invention relates to a wave-signal receiver of the tilt-out type and more particularly to an improved linkage system for supporting a chassis compartment within a cabinet for movement from an initial position to either an operating or a servicing position outside the cabinet.

v One known form of tilt-out arrangement for a wave-signal receiver includes a chassis-containing compartment in the nature of a'rectangular box of four sides that is movably supported within a cabinet. One side of the compartment is coplanar with the front face of the cabinet when the compartment is in an initial or nonoperating position within the cabinet, and the uppermost side of the compartment constitutes a control panel on which the indicator scale and the several control knobs-of a radio receiver are mounted. A tilt-out system of this type is disclosed in Patent 2,447,572 of Kurt Emde which is assigned to the same assignee as the present invention. As pointed out in that patent, in order to utilize the least amount of cabinet space for displacing the chassis compartment to its opcrating position, it is preferable that the compartment initially move in translation, like the The linkage system of the afore-mentioned' Emde patent provides the required movement of the chassis-containing compartment between its initial and operating positions. It has been found, however, that in this arrangement servicing of the radio chassis is difiicult especially when it is necessary to remove or install the chassis since the chassis is not sufficiently accessible in either of the two available positions of the movable compartment. In the initial position, the walls of the cabinet substantially completely enclose the chassis and its compartment, while in the operating position the compartment walls prevent free access to the chassis.

It is an object of this invention, therefore, to provide an improved linkage system for movably supporting a chassis-containing compartment in a tilt-out type of cabinet and which avoids the servicing limitation of the afore-described arrangement.

It is a further object of the invention to provide a'n'improved linkage system for supporting a cha'ssisbompartment for movement from an initial position within a tilt-out type of cabinet to either an operating or a servicing position outside of the cabinet, the servicing position facilitating access to the chassis.

The linkage system in accordance with the invention is adapted for inclusion in a tilt-out type of wave-signal receiver which includes an apertured cabinet and a chassis-containing compartment for supporting the compartment for movement from an initial position within the cabinet to either an operating or a servicing position outside of the cabinet. The linkage system comprises a first link pivoted at one end to a point on the compartment below and behind the center of gravity when the compartment is in its initial position. The first link is pivoted at its other end to a point of the cabinet above the center of gravity of the compartment and behind the firstmentioned point. The system further includes a second link pivoted at one end to a point on the cabinet below and in front of the center of gravity of the compartment and pivoted at its opposite end to a point of the compartment displaced vertically and to one side of the lastmentioned point of the cabinet.

The features of the present invention which are believed to be novel are set forth with particularity in the appended claims. The present invention itself, both as to its organization and manner of operation, together with further objects and advantages thereof may best be understood by reference to the following description taken in connection with the accompanying drawing in which:

Fig. l is a cross-sectional side elevation of a tilt-out type of cabinet for a wave-signal receiver including a linkage system in accordance with the present invention; and

Fig. 2 represents a modified arrangement of a locking system for the cabinet shown in Fig. 1.

With reference now to Fig. 1, the tilt-out type of wave-signal receiver there represented includes a cabinet structure l0 having a front panel ll provided with an aperture I2 for receiving a chassis-containing compartment IS. The compartment I3 is supported within cabinet 10 by a linkage system l4, constructed in accordance with the invention, for movement from an initial position within the cabinet as shown in full lines to either an operating position shown in dash-dot lines or a servicing position shown in dash-dotdot lines, both of the latter positions being substantially outside of the cabinet.

Neglecting for a moment the details of linkage system I4, compartment I3 is comprised of a front panel I5, the exposed surface of which is in the plane of cabinet panel II when the compartment is in its initial position, and a control panel I6 which is normal to the front panel. The panels I5 and I6 together with a pair of side members, of which only one designated I1 is shown, define a substantially rectangular box or enclosure and a chassis I8, shown in outline, is supported at the uppermost and foremost confines of the enclosure. The chassis includes the usual components constituting the electrical circuits of the receiver, the details of which are well known and need not be described.

The control panel I6 supports an escutcheon is, that is associated with a tuning scale, and a cooperating movable pointer coupled to the tuning device of the chassis III to provide the usual means for indicating the tuning condition of the receiver. Knob represents one of the several control knobs, customarily positioned on control panel It for ftuningcontrol, volume and tone control et cetera.

A'handle III is aiiixed to front panel I5 to provide a convenientmeans for manually displacing compartment 'I3 from its initial position to the receiver operating position in which .the linkage system has tilted the compartment essentially. out'of the cabinet. In order to prevent inadvertent movement "of the compartment beyond the operating position, means are provided for releasably locking the compartment in the operating position. Specifically, this includes a stop abutment 22 afiixed to the side of the cabinet and'a stop element 23 mounted at the rear of compartment-side l1. Engagement of the members 22 and 23 prevents movement of compartment I3 beyond the dash-dot position. In order to efiect further movement, stop element 23 is manually deflected clear of stop abutment 22. This may be accomplished by releasably holding stop element 23 in its locking position by means of a wing nut that may be easily releasedrto permit the removal of element 23 from its locking position.

With reference now to the linkage system of the instant invention, a pair of similar linkages are usually provided, one being positioned on each side of the; chassis compartment. Since these linkages are identical in construction only one need be described in detail,

Thelinkage system comprises a first, fiat, elongated," link 25 pivoted at one end to a point 26a'on compartment I3 below and behind the center of gravity, designated X, of the compartment when it is in its initial position. The pivot point 28a on the compartment is provided in one extremity 26 of a triangularly-shaped mounting plate 21 affixed to the side wall II. The extremity 26 is situated beyond the rear-most and lowermost portion of the compartment and the end link 25 is loosely riveted thereto. The other end of link 25 is pivoted to a point 29a f the cabinet above the center of gravity X and behind the first-mentioned pivot point 26a by means of a mounting plate 29 loosely riveted to'this extremity of the link 25 and afiixed to the cabinet wall.

A second, flat link which includes a pair of legs defining an angle less than 90 is pivotedat the free end of one of the legs to a point 2.3a on compartmentl3 below and in front of the center of gravity X. This pivot point is provided in the extremity 28 of mounting plate 21 to which link 30 is loosely pivoted. The free end of the other leg of link 30 is pivoted to a 4 point 3Ia, on cabinet I0 in front of the pivot point 28a through a suitable mounting plate 3I that is pivotally connected to link so and is affixed to the cabinet side. The pivot points at the ends of link 30 are displaced vertically with respect to one another and the term vertically as used here refers to both upward and downward directions along a vertical line.

Since link 30 is angular in form, it has an effective length, defined by a line through its end pivots, that is shorter than its actual length. This effective length of link 30 is also shorter than the length of link 25. The link 33 is disposed with the junction of its legs positioned within the cabinet when compartment I3 is in its initial position. The angle between the legs of link 30 is so arranged that the ,portion of the link included between the junction of its legs and the pivot 3Ia is within the confines of the cabinet in all positions of the compartment. By this provision, opening I2 of the cabinet II] need not be extended to accommodate the movement of link 30 since its angular construction allows the link to operate through opening I2. The displacement of the pivot points 26a and 28a on the compartment and the efiective lengths of the links 25 and 30 are so proportioned relative to the depth and height of compartment I3 that the compartment is efiectively free of the cabinet when the linkage system is in a reference position in which link 25 is substantially aligned with the cabinet-pivot 3la of link 30. Further, the compartment-pivot point 28a of link 30 in all operating conditions of the linkage system remains on the same side of the line between the pivot points 29a and 3Ia. In one position of the compartment, link 25 is aligned with pivot 28a of link 30 and the elbow of link 32 remains to the cabinet side of this reference line through link 25 and pivot 28a for all operating conditions of the linkage system.

In the initial position of compartment I3 its center of gravity X is between the cabinetpivot points 29a and 3Ia of links 25 and 30. Additionally, in this position links 25 and 30 tend to move in downward directions along their respective arcuate paths of travel and the compartment I3 is ina stable position, tending to remain within the confines of cabinet III. In order to displace compartment I3 to its operating position, handle 2| is grasped and a pulling force is exerted manually in a direction away from the cabinet. With regard to the initial phase of movement of the compartment, the line through the pivots of link 30 is approximately parallel with link 25 and consequently the initial motion of the compartment is essentially in translation. As this parallelism decreases, the motion of unit I3 changes to that of a combined translation and rotation. The rotational component is rather small until the compartment is approximately half way out of the cabinet at which time a substantial rotational movement is efiected. This final movement is arrested due to the engagement of the stop devices 22, 23, which brings the compartment to rest in its operating position indicated by dash-dot constructionlines. It will be noted that in this position the center of gravity of compartment I3 is outside a vertical line drawn through the cabinet pivot am of link 33, Consequently, the compartment tends to remain in a stable position with the stop elements 22, 23 preventing. further movement. The cabinet I3 thus is placed in its 'operating'positionwith control panel I3 exposed to view and acces- If access to chassis I8 is required for any reason, for servicing for example, the stop element 23- is-loosened and deflected to clear abutment 22. The compartment l3 may then be manually displaced completely outside the confines of the cabinet and becauseof thearrangement of the linkage system M, a tumbling action is effected, causing the compartment to be rotated to a position essentially at right angles to its initial position, as shown by the dash-dot-dot outline. In

displacing compartment l3 from its operating to its servicing position, the center of gravity is raised only slightly so that this movement may be accomplished with very little efiort. The compartment is stable in the servicing 'positionland Cabinet l 16 inches deep Opening l2 and panel I5 12 inches high Panel [6 10% inches high Link 25, distance between pivots 26a and 29a 12 inches Line 30, straight-line distance between pivots 28a and 3m 6 inches Angle between the legs 53 Location of pivot points in terms of the normal distances from the front face of cabinet panel II and from the under surface of the top portion of cabinet ID, with compartment I3 in its initial position,

. 'Top of Cabi- Pivot Point not 10 Panel l1 26a 13 inches. 10%inches. 28a 10%incl1cs 2% inches. 291; linch 12%inclics. 31a 16 inches linch.

Fig. 2 represents a portion of the receiver of Fig. 1 and like elements are designated by identical reference numerals. This figure shows a modified stop arrangement which is more easily manipulated than that of Fig. 1. A stop element 35 is affixed to the uppermost and rearmost portion of compartment-side I1 and extends upwardly substantially to the surface of control panel l6. A cooperating stop abutment 36 is affixed to the under side of the top portion of cabinet l0 and extends rearwardly. Abutment 36 is formed of a length of leaf-spring material and is arranged to be normally biased in the position shown. Compartment I3 is represented in the operating position in which stop element 35 engages the free end of abutment 36 thereby preventing further outward movement of the compartment. In order to displace the chassiscompartment to its servicing position, a tool, such as a screw driver, is inserted in opening [2 into engagement with spring abutment 36 to displace the spring upwardly and free element 35 *for travel in a forward direction. After element 35 clears abutment 36, the abutment returns to its normal position. When compartment I3 is returned into cabinet l0, element 35 slides past abutment 36 which then remains in its normal locking position.

While a particular embodiment of the present invention has been shown and described, it will be obvious to those skilled in the art that changes and modifications may be made without departing from this invention in its broader aspects, and, therefore, the aim in the appended claims is to cover all suchchanges and modifications as fall within the true spirit and scope of this invention.

I claim:

1; In a tilt-out type of wave-signal receiver including an apertured cabinet and a chassis-containing compartment, a linkage system supporting said compartment for movement from an initial position within said cabinet to either an operating or a servicing position outside of said cabinet, said linkage system comprising: a first link pivoted at one end to a point on said compartment below and behind the center of gravity when said compartment is in said initial position and pivoted at its other end to a point of said cabinet above said center of gravity and behind said first-mentioned point; and a second link pivoted at one end to a point on said cabinet below and in front of said center of gravity and pivoted at its opposite end to a point of said compartment displaced vertically and to one side of said last-mentioned'point of said cabinet.

2. In a tilt-out type of wave-signal receiver including an apertured cabinet and a chassis-containing compartment, a linkage system supporting said compartment for movement from an initial position within said cabinet to either an operating or a servicing position outside of said cabinet, said linkage system comprising: a first link piv-= oted at one end to a point on said compartment below and behind the center of gravity when said compartment is in said initial position and pivoted at its other end to a point of said cabinet above said center of gravity and behind said firstmentioned point; and a second link, having. an effective length shorter than said first link, pivoted at one end to a point on said cabinet below and in front of said center of gravity and pivoted at its opposite end to a point of said compartment displaced vertically and to one side of said lastmentioned point of said cabinet.

3. In a tilt-out type of wave-signal receiver including an apertured cabinet and a chassis-containing compartment a linkage system supporting said compartment for movement from an initial position Within said cabinet to either an operating or a servicing position outside of said cabinet, said linkage system comprising: a first link pivoted at one end to a point on said compartment below and behind the center of gravity when said compartment is in said initial position and pivoted at its other end to a point of said cabinet above said center of gravity and behind said first-mentioned point; and a second link, including pair of legs defining an angle less than pivoted at the free end of one leg to a point on said compartment below and in front of said center of gravity and pivoted at the free end of the other leg to a point of said cabinet below and in front of said lastmentioned point of said compartment, said link being disposed with the junction of said legs positioned within said cabinet when said compartm at is. in ts initial po.

sition so that the port on of said second link ncluded between sa d unc ion and said other end is always within the confines of said cabinet when said compartment is-displaced to its operating and servicing positions.

a. In a tilt-out type of wave-signal receiver including an apertured cabinet and a chassis-contaming compartment a linkage system supporting said compartment for movement from an initial position within said cabinet to either an operating or a servicing position outside of said cabinet. said linkag system c mpr si a first link. pivoted at one end to a point on said compartment below and behind the center of gravity when said compartment is in said initial position and pivoted at its other end to a point of said cabinet above said center of gravity and behind said first-mentioned point; and a se nd lin p oted at one end t a p t on said abine b low and in front of said center of gravity and ivoted at its opposite end to a point. of said compartment displaced vertically and to one side of said last-mentioned point of said cabinet, the displacement of said points on said compartment and the effective, lengths of said links being so proportioned relative to the depth and height of said compartment that said compartment is efiectively free of said cabinet when said linkage system is in a reference position in which said first link is aligned with said cabinet-pivot point of said second link.

5. In a tilt-out type of wave-signal receiver including an apertured cabinet and a chassis-com taining compartment, a linkage system supporting said compartment for movement from an initial position within said cabinet to either an operating or a servicing position outside of said cabinet, said linkage system comprising: a first link pivoted atone end to a point on said compartment below and behind the center of gravity when said compartment is in said initial position and pivoted at its other end to a point of said cabinet above said center of gravity and behind said first-mentioned point; and a second link pivoted at one end to a point on said cabinet below and in front of said center of gravity and pivoted at its opposite end to a point of said compartment displaced vertically and to one side of said lastmentioned point of said cabinet, the displacement of said points on said compartment and the eifective lengths of said links being so proportioned relative to the depth and height of said compartment that said compartment is effectively free of said cabinet When said linkage system is in a reference position in which said first link is aligned with said cabinet-pivot point of said second link and said compartment-pivot point of said second link in allqperating conditions of said linkage system remains on the same side of the line between the cabinet pivots of said first and second links.

6e In a tiltut ty e of w eal ce ri clu ine an ture n t and a chas s-containing compartment, a linkage system supporting said compartment for movement from an initial position within said cabinet to either an operating or a servicing position outside of said cabinet, said linkage system comprising: a first link pivoted at one end to a point on said compartment below and behind the center of gravity when said compartment is in said initial position and pivoted at its other end to point of said cabinet. above said center of gravity and behind said first-mentioned point; a second link pivoted at one end to a point on said cabinet below and in front of said center of gravity and pivoted at its opposite end to a point of said compartment displaced vertically and to one side of said last-mentioned point of said cabinet; and means for releasably locking said compartment in an operating position in which said linkage system has tilted said compartment essentially out of said cabinet.

'7. In a tilt-out type of wave-signal receiver including an apertured cabinet and a chassis-containing compartment, a linkage system supporting said compartment for movement from an initial position within said cabinet to either an operating or a servicing position outside of said cabinet, said linkage system comprising: a first link pivoted at one end to a point on said compartment below and behind the center of gravity when said compartment is in said initial position and pivoted at its other end to a point of said cabinet above said center of gravity and behind said first-mentioned point; a second link pivoted at one end to a point on said compartment below and in front of said center of gravity and pivoted at its opposite end to a point of said cabinet below and in front of said last-mentioned point of said compartment, the displacement of said points on said compartment and the effective lengths of said links being so proportioned relative to the depth and heightof said compartment that said compartment is effectively free of said cabinet when said linkage system is in a reference position in which said first link is aligned with said cabinet-pivot point of said second link; and means for releasably locking said compartment in an operating position in which said linkage system has tilted said compartment essentially out of said cabinet.

EUGENE J. POLLEY.

REFERENCES CITED The following references are of record in the file o-f'this patent:

UNITED STATES PATENTS Number Name Date 1,682,695 Miner Aug. 28, 1928 7 2,447,572 Emde Aug. 24, 1948

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1682695 *Jul 5, 1927Aug 28, 1928American Metal Furniture CoOptician's cabinet
US2447572 *Oct 8, 1945Aug 24, 1948Zenith Radio CorpRadio cabinet
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3330609 *Dec 7, 1965Jul 11, 1967Tippett Ruth RFoldaway bar stool
Classifications
U.S. Classification312/7.1, 312/325
International ClassificationH05K7/16
Cooperative ClassificationH05K7/16
European ClassificationH05K7/16