US1767730A - Balanced-cover support - Google Patents

Description

e .A. BERSTED'ET AL I 1,767,730

'- BALANCED COYER- SUPPORT Fil ed'April 25, 1927 v' E: I E: 5 di "red Basia! 7 ,a rljn eraiea Patented June 24, 1930 PATENT eerie]:-

ALFRED BERSTED AND MARTIN BERSTED, OF CHICAGO, ILLINOIS BALANCED-COVER surroa'r Application filed April 23,

This invention relates to a balanced cover support for lids of phonographs and the like and concerns itself with novel mechanism including a balance spring which is adapted to be adjusted through the rear wall of the cabinet. for varying the tension of the spring according to the weight of the cover in order that the cover may be balanced in any of its open positions; the spring being so connected that its resistance will vary according to the height of the cover above the phonograph top.

An object of the invention is to provide a balanced cover support for talking'inachine cabinets or the like in which the cover may be balanced in any open position.

A further object'of the invention is to provide a balanced cover support in which the balancing means may be readily adjusted through a wall of the cabinet.

A further object of the invention is to provide a balanced support for hinged lids which may be readily adjusted'to lids of various sizes and weights by manipulation of a single element. v r

A further object of the invention is to provide a'balanced coversupport which is eflicient in service and economical to manufacture.

The invention comprises the novel structure and combination of parts hereinafter described and more particularly pointed out and defined in the appended claims.

In the accompanying drawings which illustrate a preferred embodiment of this invention and in which similar reference numerals refer to similar features in the different views:

On the drawings: I

Figure 1 is a fragmentary sectional view through a part of a phonograph case show ing one of the balanced supports connected to one end of the cover.

Figure 2 is a sectional view taken substantially upon the line IIII of Figure 1.-

Figure 3 is a view similar to Figure '1 illustrating a slight modification of the invention. I

As shown on the drawings; 7

Referring now to Figures 1 and 2 of the 1927. senaino. 185,939.

drawing, the reference numeral 1 refers to the rear wall of a phonograph cabinet hav-' ing a motor-board 2 provided with a suit-' able slot 3 adjacent one end of the cabinet; The slot 3 is closed'by a flange 4 on a depending bracket 5 which extends into the cabinet along one of the side walls as shown in Figure 2. The ends 6 of the flange 4 overlap the ends of the slot 3 and are secured to the motor-board by means of screws 7 or the like. The flange 4 of the bracket is provided with a slot 8 through which a link 9 passes. The upper end of the link 9 is pivoted to the cover 10 of the phonograph. The lowerend of the link 9 is pivoted at 9 to one end of a lever 11 which in turn is pivoted at 12 to the bracket 5. It will be noted that the lever 11 is substantially in the form of a bell crank with the exception that the pivot point is at one end. The'lever 11 is provided with an ear 13 to which one end of a coil spring 14 is an chored. The other end of this coil spring is anchored to an ear 15 on one end of a lever 16 which is pivoted at one end to the bracket 5 as indicated by the reference" 17. The free end of the lever 16 is substantially in the form of a segment provided with teeth 18 which teeth coact with similar teeth 19 on a lever 20 which is pivoted at 21 to the bracket 5. It might, therefore, be said that the levers 16 and 20 are intergeared the levers or members 16 and 20 have a toggle-like action. Above the pivot point 21 there-is an ear 22 on the lever 20. The bracket 5 is provided with an abutment 23 adjacent the ear 22 and a'screw '24 extends through the abutment 23 and is threaded in the ear 22; the head on the screw 24 is necessarily larger than the hole in the abutment 23 so that thehead will abut such abutment. The rotation of the screw will obviously raise or lower the meeting ends of the levers 16 and 20 andthereby vary the tension of the spring 14. It will be noted that the rear wall 1 is provided with an opening 25 at the screw head in order that a tool may be inserted therethrough for rotating the screw and adjusting the tension of the spring.

To limit the upward motion of the link 9 and the lever 11 a boss 26 is provided on the lever 11 adjacent the pivot point '9, which boss 26 abuts the shoulder 27 on the bracket 5 when the cover 10 is in the position shown by the full lines in Figure 1. This boss 26 in abutment with shoulder 27 thereby prevents further elevation of the cover 10. A safety lug or boss 28 is provided on the bracket 5 adjacent ,the pivot point 12 and will be abutted by a shoulder 29 on the lever 11 when the cover 10 is in its closed Osition as shown by the dotted lines in Figure 1. This lug 28 acts as a safety lug to pre vent the lever 11 and link 9 from going beyond their desired positions when the de vice is installed, and further acts as a stop member or rest for the lever 11 when the cover is in closed position and prevents the slamming of the cover 10.

In Figure 3 the link 9 that connects with the cover is also pivoted to a lever 11 which pivots at 12 to a bracket 30 having a flange 31 at one end by means of which it may be secured to the rear wall of the phonograph cabinet. The lever 11 in Figure 3 is connected by a spring let with a lever 16 as in Figure 1 and the lever 16 cooperates with a lever 20 as in the first form. The lever 20 in Figure 3 is also provided with an ear 22 for threaded relation with a screw 24: which extends through a suitable aperture in the flange 31; aperture 25 being provided in the rear wall adjacent the head of the screw in order that the set screw may be manually adjusted for varying the tension of the spring. The lever 11 is also provided with aboss 26 to abut the shoulder 27 on the bracket 30, which bracket is also provided with a safety lug or boss 28 so positioned as to be abutted by a shoulder 29 on the lever 11 when the cover is in closed position, substantially as previously described.

It will be noted that the structures shown in Figures 1 and 3 are substantially alike with the exception thatthe bracket 30 is attached to the rear wall in Figure 3, while in Figure 1 the same is suspended from the motor-board 2. It will, of course, be understood that in both of the forms illustrated there will be duplicate supports on each side of the cover. 1

e are aware that many changes may be made and numerous details of construction may be varied through a wide range without departing from the principles of this. invention and we, therefore, do not purpose limiting the patent granted hereon, otherwise than necessitatedby the prior art.

'lVe claim as our invention:

1. In a phonograph cabinet provided with a rear wall and a motor-board. a plate secured in said cabinet, a lever pivoted to said plate, a link connecting said lever with the cover and a pair of intergeared levers pivotally mounted onsaidbracket, a spring connecting said first mentioned lever 'with one of said second mentioned levers, and means operable through the rear wall of the cabinet for adjusting one of said inter-geared levers about its pivot.

2. In a phonograph cabinet having a. rear wall and a motor-board, a bracket secured adjacent the motor-board and projecting within the cabinet, a link connected to the cover of the cabinet and extending through said motor-board, a lever pivoted to the bracket and pivotally connected to the link, a pair of intergeared adjustable members on the bracket, a yielding means connecting said first mentioned lever, andsaid intergearcd members, and means operable through the rear wall of the cabinet for adjusting said members for varying the tension of said spring.

3. In a phonograph cabinet having a rear wall and a motor-board, a cover supporting link extending through the motor-board, a bracket arranged adjacent themotor-board, a lever pivoted to said bracket, said link being connected to the free end of said lever, a coil spring connected to said lever, an adjustable anchoringdevice for said spring, said anchoring device comprising two mem bers supported on said plate for pivotal movement and having toggle-like action for varying the length of said spring and means operable through the rear wall ofthe cabinet for adjusting said anchoring device.

4. A talking machine cabinet having a rear wall and a motor board, aplate secured to said cabinet adjacent said motor board, a

link connected to thecover of said cabinet I ing the free ends thereof provided with teeth and in mesh with each other, a spring connected at one end to said lever and at the other end to one of said members, and a screw connected to one of said members operable through the rear wall of the cabinet for oscillating the other of said members to vary the-tension of said spring. 7

5. A talking machine cabinet having a hinged lid, a plate secured in said cabinet, a link connected at one end to said lid, a lever pivoted to said plate and to said link, two members pivoted at the outer ends thereof to said plate and with the inner ends in geared engagement, a spring secured to one end of said lever and at the other end to one of said members, and a screw connected to one of said members for moving said members about the pivots thereof to vary the ten-- sion of said spring.

6. A talking machine cabinet having a hinged lid, a plate secured in said cabinet, a link connected at one end to said lid, a lever pivoted to said plate and. to said link, two

members pivoted at the outer ends thereof to said plate and With the inner ends in geared engagement with each other, a spring secured at one end to said lever, and at the other end to one of said members, said plate having an outturned ear thereon, a threaded ear on one of said members and a screw in said ears for varying the angular position of said members about the pivots thereof to vary the tension of said spring.

In testimony whereof, We have hereunto subscribed our names.

ALFRED BERSTED. MARTIN BERSTED.

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