US1327978A - Cover-support - Google Patents

Description

B. B. BLOOD.

COVER SUPPORT.

APPLICATION .nuzn MAY 5. i919 v Patented, Jam 13, 1920.

E a earns PATENT OFFICE. i

BURR B. BLOOD, OF CHICAGO, ILLINOIS, ASSIGNOB OF ONE-HALF TO GEORGE I-IEIIDMAN AND ONE-HALF T0 NORMAN A. STREET, BO'II-I OF CHICAGO, ILLINOIS.

COVER-SUPPORT.

Specification of Letters Patent.

Patented Jan. 13, 1920.

Application filed May 5, 1919. Serial No. 294,883.

of a construction which will automatically assume a supporting position when the cover or lid of the cabinet has been raised or tilted.

A further object of the invention is to provide a construction which will readily yield to a predetermined amount of pressure on the cover or lid when it is desired to lower or return the'latter to closed position; the support thereby being moved 1nto a non-supporting position which will not interfere with the cover or lid remaining properly closed.

Another object of my invention is to provide a construction whereby the movement or return of the cover or lid to closed position may be caused without the sudden drop- .ping of the cover or lid from a point immediately prior to a complete closing thereof; the construction therefore preventing the sudden-jar which would result from a complete removal of any counter elfect'to the action of gravity.

The invention may have expression in somewhat different mechanical forms from 1 those disclosed in the drawing without, however, departing from the spirit of the invention; the drawing, however, illustrating what I believe to be the best adaptations of the invention, the advantages and operations whereof will be'readily comprehended from the following detailed-description ofthe ac- "preferably in the nature of a grooved roller '27, arranged in the path of and adapted to companying drawing wherein Figure 1 is a vertical sectional view of the upper part and lid or cover of a phonograph cabinet with my improved cover support shown in elevation and the cover or lid and support shown in full lines in-closed position and in dotted lines in raised or open position.

Fig. 2 is a detail view, in perspective, of the cover support shown in Fig. 1.

Fig. 3 is a vertlcal sectional view of a portion of the upper part of a phonograph 22, to the side wall or cabinet and portion of the lid or cover provided with a modified form of my cover support which is shown in side elevation; the cover or lid and support being shown in closed position in. full lines and in raised or opened position in dotted lines.

The invention is especially applicable for use in connection with the type of phonograph cabinet wherein the cover or lid 10 is pivoted or hinged at one side, to-wit at the point 11, to the cabinet 12.

The cover support comprises a link or arm 13, the upper end whereof is pivotally secured at 14 to a suitable bracket or lug 15 which latter is permanently secured to the cover or lid; while the link or arm 13 extends downwardly through a slot 16 in the cabinet top 17 the slot 16 being of sufficient length to permit the link or arm 13to move into the position shown in dotted lines in Fig. 1 when the cover or lid 10' has been tilted or raised.

a The lower end of the link or arm 13 is pivoted at 18 to a second link or arm 19 which latter is preferably pivoted at 20 to a bar or member 21 which is intended to be permanently secured, by means of the screws panel of the cabinet 12.

The upper end of the bar or member 21' has a third link or arm .23 pivoted thereto at 2 1; and the free end of this third link or arm .23 has'one end of a retracting coil spring 25 secured thereto; the other end of the spring being secured at 26 at a suitable point on the wall or side panel'of the cabinet 12. The spring 25 is of such length that the link or arm 23 will be maintained under constant spring pressure which tends to draw the free end of the linker arm 23 upwardly into the position shown in dotted lines in Fig. 1. I

Link or arm 19, at proximity to the pivotal point 18, is provided with an extension,

ride along the edge of link or arm 23, the upper end ofthe link or arm 23 being shoulderedor ofi'set'at'the point 28 in order to dispose link or arm 23 in the path of roller 27 and the lower'or free'end of link or arm mal or lowered position shown infull lines.

in Figs. 1 and 2.

cabinet 12.

It is evident from the construction shown and described that the spring 25 is distended and placed under increased tension when the cover or lid is in closed position; the mechanism, however, being so arranged that the cover or lid will remain lowered or closed; the maintaining or" this position being assisted by providing the link or arm 23 with the notch or socket 29. On the other hand, the force of spring 25 and the action of the respective arms or links are 7 such as to counteract the Weight of, or action of gravity on the cover or lid and maintain it"in raised position until suflicient pressure is applied to the cover orlid in a downward direction.

In Fig. 3 I illustrate a modified form of the inventionwherein the cover or lid 10 is provided with a link or arm 30 pivotally secured'at its upper end to the lid or cover; while the lower end is pivoted at 31 to a second arm or link 32; with the opposite end of the .latter pivoted at 33 to a bar or member 34 permanently secured by means of screws 35 to the side wall or panel of the The upper end of the bar or member 34 has a link or arm 36 pivotally secured at the point 37. The tree or lower vend of the link or arm 36 is preferably bowed or bent forwardly so as to somewhat increase the distance between the free or lower end of link or arm 36 and the lower end of bar or member 34. The free or lower end of link -or arm 36 has oneend of a suitable retrartingcoil spring 39 secured there to; while'the other end of the spring is secured to the lower end of bar or member '34 atra point beneath the pivotal point 33 of link or arm 32. As is evident, the normal tendency of the coil spring 39 is to retract or draw the lower end of link or arm 36 toward bar or member 34.

Link or arm '32, on the side disposed toward link or arm 36, is provided with a suitable extension or roller 38 adapted to ride along the edge of link or arm 36 during tion, so that the retracting action of spring 139 on link or arm .36 will cause the latter 'to'bear against roller 38 in a direction substantially-on "dead center with the pivotal point .33. It is evident from'this arrangement that the spring will not :tend to lift. the cover-or lid voluntarily.

lThe .upward :movement :of the cover "or lid lfl' WiIl causelinkpr; arm :302t0, be raised into the position shown in dotted lines, causing link or arm 32 to be swung into the upwardly inclining position shown in dotted lines; While the tension of spring 39 will draw the link or arm 36 into the position shown in dotted lines. With this position of the support, it is evident that the retracting action'of the spring 39 is imparted to links or arms 30 and 32 through the medium of link or arm 36 and the roller 38; the strength of spring 39 being such that collapsed or folded condition of the links will be maintained and the cover or lid thereby held in the raised position until sufficient downward pressure is applied .to the lid by the operator when it is desired to lower the cover or lid.

As is evident from the constructions shown and described, the respective pivotal points of the various members and the lines of force induced by the retracting action of the springs are so correlated, that the tension of the springs will be sufi'icient to hold the cover or lid in raised position, while at the same time being insufficient to voluntarily move the cover or lid from its complete closed position; the arrangement of the elements, however, being such that the tension of the spring increases as the cover or lid moves to closed position and thereby prevents the sudden dropping of the lid when downward pressure has been applied thereto.

It is evident from the constructions shown that bars or members 21 and 34 may be omitted if desired, and the ends of links or arms 19 and 23,-and 32 and 36 in the two constructions may be pivotally secured directly to the sidewall or panel'of the cabinet; the barsor members 21 and 34, llOW- ever, being preferably employed sot-hat the supports are presented as complete units in assembled conditionready to be'applied to the cabinet with the pivotal points of the respectivearms or links properlypositioned.

What I claim as my invention is 2-- 1. A cover support, comprising alink or arm, one end'whereof is adapted to be pivotally secured to a cover or lid and-depend thereirom,.a second arm or linkhaving one end pivotally secured to the lower end of the first arm or link, while the other end of the second arm or link has a fixed pivotal point, the pivotal points'ot the arms or links being suchas to permit vertical movement of said arms or links,.a third arm or link, one end whereof has a fixed pivotal point in a a plane above the fixed pivotal point of said second armor link,while thefree end of said third arm or link is normally disposed in a plane below the normal plane ofgsaid second arm or link, a retracting spring, one end whereof is secured to the free end of said third armor link 'while'the other end of said spring is'fixedly secured to the cab- .illet, and. means ..intermedi a te of the .second and third arms' or links whereby the re tracting action of the spring on the free end of the third arm or link is imparted to the second arm or link.

2. A cover support, comprising an arm or link, one end whereof is adapted to be pivotally secured to a cover or lid and depend therefrom, a second arm or link, one end whereof is pivotally secured to the lower end of the first arm or link, while the other end has a fixed pivotal point on the cabinet or device provided with the cover or lid, a third arm or link, one end whereof is pivotally secured at a point above the fixed pivotal point of the second arm or link while the free end of said third arm or link is adapted to extend below the normal plane of said second arm or link, the second arm or link having slidable bearing relation with the third arm or link, and a spring whereby the third arm or link is maintained under constant pressure.

3. A cover support, comprising an arm or link adapted to be pivotally secured to a cover or lid and depend therefrom, a second arm or link, one end whereof is pivotally secured to the lowerend of said first arm or link, while the other end of said second arm has a fixed pivotal point on the cabinet provided with the lid or' cover, a third arm or link having a fixed pivotal point at one end on the cabinet, while the other end is adapted to extend below the normal plane of said second arm or link, the second and third arms or links having sliding bearing relation with each other, and means whereby the third arm or link is held under constant pressure adapted to maintain the support in its adjusted positions.

4:. A cover support, comprising a bar or member adapted to be secured to the side wall of a cabinet, a pair of links, the end of one being pivotally secured adjacent the upper end of said bar or member, while one end of the other link is pivotally secured adj acent the opposite or lower end of said bar or member, the two links having sliding bearing relation with each other, a third arm or link adapted to be pivotally secured at one end to the cover or lid of the cabinet and depend therefrom, while the other end is pivotally secured to the free end of one of said pair of links, and means whereby the first mentioned link of said pair of links is placed under pressure and the adjusted re lation between the links maintained 5. A cover support, comprising a pair of arms or links, one end of each arm or link being adapted to be fixedly pivoted to the cabinet, with the fixed pivotal point of one link arranged in a horizontal plane above the fixed pivotal point of the other, said arms or links being arranged in sliding frictional relation with each other, means whereby said frictional relation is yieldingly maintained, and a third arm or link adapted to be pivotally secured at one end to the cover or lid of the cabinet, while the other end is pivotally secured to the free end 0 one of said pair of links.

- BURR B. BLOOD.

Witnesses: l

G. HEIDMAN,

F. A. FLORELL.

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