US1473707A - Stylus-bar mounting - Google Patents

Description

Nov. 13 1923. 11,473,7IW

I. LAUTER ET AL 5 TYLUS BAR MOUNTING Filed Jan. 20. 1922 Patented Nov. 13, 1923.

ii? i IGNATZ LA'UTER- AND EREDRICK HOPPE, OF NEW YORK, N. Y.

STYLUS-BAR MOUNTING.

Application ales January 20, 1922. seria is. 530,716.

T all whom it may concern:

Be it known that we, Ienarz Lauren and Fnnnnron G, Horns, citizens of the United States, residing at New York, in the county and State of New York, have invented jointly certain new and useful Improvements in Stylus-Bar Mountings, of which the following is a specification.

This invention relates to a self-adjusting suspension for phonograph stylus arm, and an object of the invention is to provide a suspension so designed that while it will permit of appropriate vibratory movement of the arm,'it willyet remain effective at all times to compensate for wear, to the end that chattering of the parts at the points of suspension will be avoided at all times.

A further and more detailed object is to provide a pivot element for the stylus arm heldnnder spring pressure exerted from rarious, directions and effective to hold the pivot element at all times tightly and firmly to its work, notwithstanding the wearing effect of the violent vibratory movement of the stylus arm.

Other objects and aims of the invention, more or less specific than those referred to above, will be in part abvious and in part pointed out in the course of the following dQSOll'pi1lO11 of the elements, combinations, arrange-limits of part and arp i ion o principles, constituting the invention, and the scope of protection contemplated will be indicated in the appended claims.

In the accompanying drawings which are to be taken as a part of this speclfication, and in which we have shown merely a preferred form-of embodiment of the invention Figure l is an elevational view of a porac tion of a phonograph reproducer having its stylus arm suspended in accordance with this invention.

Figure 2 is a side elevational view of the parts seen in Fig. 1, and

Figure 3 is a View similar to that seen in Fig. 2, but being partly in section upon the plane of line III of Fig. 1.

Referring to the drawings for describing in detail the structure which is therein illustrated, the reference character L indicates the main body, or frame, of the reproducer, and the reference character G indicates the stylus arm which, it will be understood, is connected by its upper end with the diaphragm 1 of the reproducer in the usual way.

This body portion, as H, is formed with opposite bearing seats 2- and 3 within which engage the pivot members at and ,5 respec' tively, so that the stylus arm is permitted an appropriately free vibratory motion, as is fully understood in this art.

The pivot member l is rigidly fixed in. or formed as a part of, the frame L.

The pivot member 5 consists of a sepao5 rately formed rod of appropriate size slidahly received in a tubular passage 6 formed in the frame. The inner end of this pivot member is suitably pointed to engage within the bearing seat 3 .directlyop iiosed to the corresponding end of the pivot member a, and its outer end projects slightly beyond the adjacent surface 7 of the frame and is engaged by a leaf spring 8 which constantly exerts a force pressing the inner end into the seat 3 and tending to crush the body H between said inner end and the inner end of the pivot member a. In this simple manner the pivot members are held in non-chattering engagement with the bearing seats at all times and automatically even tho both the pivot members and the seats may be badly worn from use.

The spring 8 maybe supported in any appropriate manner but for convenience is shown to be held by a suitable screw, as 9, which fixes one of its ends firmly to the frame L, the frame preferably being formed with a suitable shoulder, as 10, against which one end of the spring engages, to thus proi i vide a simple means for retaining the spring against movement out of engagement with the end of the rod ,5.

Since the rod 5 is slidable within theopen ing 6 and is, therefore, likely to have a 9; minute lateral movement in said opening which would produce an objectionable chattering in use, it is a particular feature of this invention to provide means for preventing lateral movementand for thereby overcoming such chattering.

A simple expedient for this purpose is illustrated in the drawings to consist of a second leaf spring, as 11, also held to the frame L by a screw, as 12, and having its free end, as 13, bent so as to exert a pressure sidewise against the rod at a point in termediate the length of the rod. The frame L has a portion cut out therefrom to leave an opening, as 14:, wherein a suitable eX- 110 panse of the rod is exposed for engagement by the spring.

In the instance illustrated *the lateral pressure from the spring 11 is exerted upwardly against the bottom side of the rod holding the upper side of the rod. in tight engagement with the upper wall, as 15, of the openingditho obviously this pressure may be exerted in any lateral direction desired for most efiectively overcoming the tendency to lateral movement of the rod.

It will be apparent -from this disclosure that the pivot member 5 and the springs associated therewith will serve to support the stylus arm in a firm engagement with the frame L at all times, irrespective of wear. .i-ind that the frictional engagement ofthe spring 11 against the pivot member 5, while not interfering with such longitudinal movement of said pivot member, under the influence oi spring 8, as to provide firm eugagement with the stylus arm, will yet so impede this movement as to overcome any longitudinally bodily vibratory movement of the pivot member in use.

As many changes could be made in this construction without departing from the scope of the invention as defined in the fol lowing claims, it is intended that all matter contained in the above description, or shown in the accon'ipanying drawings, shall be interpreted as illustrative only and not in a limiting sense.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent is 1. A stylus arm suspension comprising a pivot element, a support therefor, and means exerting a resilient pressure against said pivot element in a plurality of directions.

2. A; stylus arm suspension comprising a pivot element, a support therefor, means on citing a resilient pressure against said pivot element holding it pressed against the stylus arm, and other means exerting a resilient pressure against said pivot element in a different direction. V r

3. stylus arm suspension comprising a pivot element, a support therefor comprising a member having an opening therein within which the pivot element is loosely received, means exerting a resilient pressure against said pivot element tending to move the pivot element in a direction longitudinally of its length and against the stylus arm, and other means exerting a resilient pressure laterally against the pivot element to hold the pivot element pressed against the wall of said opening i A stylus arm suspension comprising a pair of pivot elements between which the stylus arm is mounted, supports for said pivot elements, one of said pivot elements being mounted in an opening formed in its support so as to be movable toward the other pivot element, means engaging the movable pivot element tending to move it toward the other pivot element, and means also engaging said movable pivot element holding it pressed against the wall oi said opening.

5. A stylus arm suspension comprising a pair of pivot elements between which the stylus arm is mounted, supports for said pivot elements, one of said pivot elements being relatively stationary and the other beingrelat-ively movable, means engaging the movable pivot element tending to move it toward the other pivot element, said movable pivot element being received in an opening in its support, and means also engaging said movable pivot element holding it pressed against the wall of said opening. 7

6. A stylus arm suspension comprising a pair of pivot elements between which the stylus arm is mounted, supports for said pivot elements, one of saidpivot elements being mounted in an opening formed in its support so as to be movable toward the other pivot element, means engaging the movable pivot element tending to move it toward the other pivot element, the support of the mentioned pivot element having a portion cut away therefrom intermediate the length of said opening so as to expose an intermediate portion 01": said pivot element, and means engaging said exposed portion of said pivot element exerting a force to hold said pivot element pressed against thewall of said openin 1 In testimony whereof we aiiix our signatures in the presence of two witnesses.

IGNATZ LAUTER. 'FREDRICK G; HOPPE. Witnesses:

L. Gnssronn HANDY, MAY SoHULz.

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