US2052506A - Pick-up box carrying assembly - Google Patents

Description

Aug. 25, 1936.

PICK-UP BOX CARRYING. ASSEMBLY Filed Jan. 21, 1935 6 Jay" .1. I '14 17 12 Y if y W 13 12 4 V 16 15" r' 3 1 llll. 7 1

D fl Z\ Z Wmmumn HIIIHIQ z I 2 r lllllllllllIlllllllllll BY TTTTTT EY J. A. VOLK 2,052,506 I Patented Aug. 25, 1936 UNITED STATES PICK-UP BOX CARRYING ASSEMBLY 7 Joseph Anthony Volk, St. Louis, Mo.

Application January 21, 1935, Serial No. 2,776

2 Claims.

This invention relates to sound reproducing instruments of the type employing a pickup box or the like for use with phonograph records, and its general object is to provide an assembly for carrying the box so that in its movement radially of the record, its longitudinal axis will be always disposed substantially in a vertical plane tangent to the groove of a record, thereby preventing lateral pull of the needle or stylus to the sides of the groove, and so as to cause the needle to engage the groove in a positive and uniform manner, substantially throughout the entire radius of the grooved surface, which results in better reproduction and prevents premature wear of the groove and needle.

A further object of the invention is to provide a pickup box assembly that retains the needle of the box in the groove of the record with minimum pressure which also adds materially in producing better reproduction and preventing wear.

Another object of the invention is to provide a pickup assembly of the character set forth, that can be easily and expeditiously mounted or applied to the mounting tables of all phonograph cabinets and the like, is simple in construction, inexpensive to manufacture and extremely efficient in operation and service.

This invention also consists in certain other features of construction and in the combination and arrangement of the several parts, to be hereinafter fully described, illustrated in the accompanying drawing and specifically pointed out in the appended claims.

In describing my invention in detail, reference will be had to the accompanying drawing wherein like characters denote like or corresponding parts throughout the several views, and in which:

Figure 1 is a side view of my device, partly in section, and illustrates the same in use.

Figure 2 is a top plan view of the device in use.

Referring to the drawing in detail, the letter A indicates the mounting table of a phonograph cabinet or the like, and B the turntable of the usual construction.

My device includes a supporting frame that is provided with a base I which as shown has openings arranged therein to receive screws 2 or other like means for securing the supporting frame to the mounting table A as best shown in Figure 1. Formed on the base and rising therefrom is an upright 3 which has formed thereon and extending at right angles from the upper ends thereof parallel arranged bearing blocks 4, the latter having ball recesses disposed in the undersides thereof to accommodate bearing members 5. The bearing blocks have openings extending therethrough and centrally of the recesses to receive shafts B that have their lower ends mounted in ball recesses or chambers 1 formed in the base I. The lower ends of the shafts 6 are recessed to receive bearing members 8 disposed in the chambers I, as best shown in Figure l.

The shafts have secured thereto for vertical movement thereon, collars 9 that are held in adjusted position, through the instrumentality of set screws l0, and against the bearing members 5, therefore it will be apparent that the collars can be adjusted to compensate for wear.

Each of the shafts have formed on the upper ends thereof one of the ends of horizontal arms ll, while the opposite ends of these arms II are reduced as at l2 to receive the reduced ends l3 of a cross bar I4. It will be noted from Figure 1 that the cross bar 14 has its reduced ends l3 pivotally mounted on the reduced ends of the arms ll through the instrumentality of screw pins [5.

The pickup box which is indicated by the letter C has secured to the rear face thereof a bracket l6 that is provided with a bore extending transversely therethrough to receive the cross bar M, in a manner whereby the box is pivotally associated with the bar [4, and the bracket It has formed thereon a counterweight I! to balance the box as will be apparent.

The bracket I6 is held centrally of the cross bar I4 by collars l8 which engage the sides of the bracket l6 and the collars are adjustably secured to the bar [4 by set screws 19.

The box C is provided with the usual opening to accommodate a needle or stylus D which is adjustably secured thereto by a set screw as shown.

From the above description and disclosure in the drawing, it will be obvious that I have provided an assembly for carrying the pickup box in a manner to prevent premature wear of the needle and groove of a record, as the assembly causes the needle to engage the groove in a positive and uniform manner, in that lateral pull to the sides of the groove will be practically eliminated, and this feature coupled with the fact that the needle is retained in the groove with minimum pressure, will result in reproduction far superior to that obtained by the pickup arms now in general use.

It is thought from the foregoing description that the advantages and novel features of my invention will be readily apparent.

I desire it to be understood that I may make changes in the construction and in the combination and arrangement of the several parts, provided that such changes fall within the scope of the appended claims.

What I claim is:

1. An assembly for carrying a pickup box and comprising a supporting frame, shafts journaled in the frame, an arm for each shaft and having one of its. ends fixed thereto, means bridging and pivotally secured to the opposite ends of said arms and cooperating with the shafts for holding the arms in parallel relation with respect to each other, a bracket fixed to the pickup arm and in cluding counterbalancing means for the latter and rising from the bracket, said bracket being slidably and pivotally secured to the bridging means, and collars adjustably secured to the bridging means and engageable with the oppo= site sides of the bracket to hold the latteradiustably secured on the bridging means.

2. An assembly for carrying a. pickup box and comprising a supporting frame including a base having a pair of recesses therein, an upright formed with and rising from the base, bearing blocks formed on the upper end of the upright and overhanging the base, with a pair of recesses therein aligned with the recesses of the base, shafts journaled in the bearing blocks and recesses of the base respectively, antifriction means for said shafts and disposed in the recesses, an arm for each shaft and having one of the ends thereof fixed thereto, a cross bar pivotally secured and bridging the opposite ends of the arms and cooperating with the supporting frame for securing the arms in parallel relation with respect to each other, means secured to the box and slidably and pivotally mounted on the cross bar, adjustable means to hold the box mounting means against sliding movement, and counterbalancing means for the box.

JOSEPH ANTHONY VOLK.

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