US1319171A

US1319171A - Phonograph-stop

Info

Publication number: US1319171A
Authority: US
Publication date: 1919-10-21
Anticipated expiration: 1936-10-21

Description

F. A. NOLAN.

PHONOGRAPH smP APPLICATION FILED MAY 21, 191].

1,319,171. Patented 001. 21,1919.

- UNITED STATES PATENT orrion FRANCIS A. NOLAN, or sn'rAUL, MINNEsoTAQ PHONO GRAPH-STOP.

To all whom it may concern.- Be it known that I, Francis A. NOLAN, a citizen of the United States, residing. at St. Paul, in the county of Ramsey and State of Minnesota, have invented a new anduse ful Improvement in Phonograph Stops, of which the following is a specification.

I This invention relates to improvementsin stops for sound reproducing machines, which are adapted. to automatically cause the arrest of rotation of a record structure when the playing of a recordis completed, so as to avoid scratching the record loy-a needle or stylus. More particularly this invention relates to that classof stops which can be easilyfattached to or detached from the' sou'nd reproducing machine and which can be easily set forarrestin'g the rotation of the record structure at the end of the record,,irrespective of the length or kind of sound groove in the record. In other words myinvention is adapted to-arrest the rota tion of the record structure whether the stylus or sound reproducing needle or point plays inwardly or outwardly on the record, that is when'the stylus or point travels inwardly toward the center of. the record or outwardly toward the periphery. My invention also contemplates certain novel features pertaining to the brake mechanism employed. With these and: other objects in view, my invention comprises the features of construction and combination of parts, particularly which will hereafter be more described and claimed. I

e In the accompanying drawing formingpart of this specification Figure 1 is plan of a sound reproducing machine of thecon ventional- Victor type to which my invention is shown applied, part of the structureof 7 said machine vbein gyloroken awayand in sec tion; Fig.2 is asectionof a detail taken on the line of Fig. 1; Fig. 3 is a plano'f a portion of the structure illustrated in Fig. 2, part of said structure being broken away and in section; Fig. 4 isap'erspective of they 'brake:base plate; Fig. 5 is a perspectiveof detail of'a' sound reproducing machine showing an alternatlve constructlon of my inventhe stop piece which isused on the brake; Fig. 6 is a: perspective of my improved trip for the brake; Flg. 7 is a side elevation of a tion, part of the structureillustrated being broken away and in section; Fig. 8 1s a perspectiveof the trip memberemployed in the a usual turn table 2. and tone arm or sound tube 3, wh1ch 1s swiveled to turn the usual manner. as the sound boxwith its needle construction illustrated in Fig. 7 Fig. 9 is a plan of anotheralteniativeconstruction of trip mechanism' which may be employed with my invention, said trip mechanism be ing mounted on the tone arm, a cross section Specification of Letters Patent. V Pate t d O t 21 1919 Application fi lecl May 2 1, 1917. Serial No. 169,844

of which is illustrated; Fig. 10 isa side,ele

'vation of the construction of my improved trip nechanism illustrated in Fig. 9, and Flg. 11 is a side elevation of adetail of a; tone arm upon which the :improvedtrip mechanism illustrated in Fig. 9 isadapted to be mounted. V I Referring to Figs. 1 to 6 of the drawing,

A. indicates a. sound reproducing machine of; the Victor or other disk type having. the

point or stylus, tracksin the sound; groove of the record on the turntable in the usual manner, either toward the center thereof or outwardly toward its periphery. The turn table 2 has the usual downwardly extending flange 4 on its periphery andarranged to engage the inner, surface of this flange is the brake B forming part of my improved stop mechanism. This brake has its-break member formed from a single piece of sheet I metal orjother suitable. material having a tlltable brake shoe arm 5 pivoted midway betweenits ends uponthe pivot 6 passing I downwardly through a base plate-' 7, which.

is secured through the openings 8 bynails or screws 9 upon the-top 10 'of the body 11 of the sound reproducing machine. Extending laterally from the tiltablef member 5 is an operating lever 12bywhich the brake shoe I member 5 is. tilted one way or the other about itsrpivoti' The extremities-of memher 5 have brake" shoe or buffer elements 13 and 14;, extending outwardly and inwardly therefrom, which are arranged so that when the operating-lever 12 is shifted in one direc tion, braking'action is' applied against the inner s'urface of, flange any. brake shoe elelQ'O I ment 1'3 andwhen said operatingflever is reversed, the brake shoe-element is. m-' pressed agamst theinner surface of said;

flange. i In median positionfl both'lorake shoebufier elements are out {of contact withflange't as illustrated ini Fig. "3. A helical expansion spring '15 has one "of its' ends secured toan arm'16 extending upwardly from theinner v, I

end of the plate andits other secured;

to a pinl'? on the' outer portion of the operating lever 12, said arm 16 and pin 17 be1ng arranged on a line intersecting the pivot 6 and at right angles to a longitudinal median line passing through member 5. Thus when the operating lever 12 is tilted in either direction, said spring will immediately cause one of the brake shoe elements to be impressed against the inner surface of the rim 4, and stop the turn table from revolving when'the operating lever 12 is tilted in either direction. Theouter extremity of the operating lever 12 is formed with an upwardly extending shoulder'piece 18, and the body of said operating lever is enlarged and formed with an opening 19 and an inwardly projecting stop shoulder 20;

Mounted upon the plate 7 and extending upwardly through opening 19 is a stop piece 21 having two stop lugs' 22'and 23, which are adapted according to the position assumed by the stop piece rotatively to prevent swinging movement by the lever 12, either in one or the other direction", and thus limiting the use ofthe brake element to one of the brake shoes-at a time against the flange l. 7 The stop piece 21' is rotatably mounted upon the shaft 245projecting upwardly from the plate 1 7, a cavity 25' being formed'in said stop piece through which said shaft projects. The coil spring26 placed around said shaft in said cavity presses downwardly against the lower end 27 7 of the stop piece and upwardly against abur 28, which isrotatably mounted in said cavity and threaded upon the shaft Formed uponthe lowerend of the stop P1306 isa key 30', which is adapted to fit into one or the other of the

openings

31 and 32 in the plate 7, thus locking the stop piece in either one or the other of the positions thus assumed. "The spring 26 holds the stop piece with the key 30 engaged with either one of the openings31 or 32, but permits the stop piece to be lifted by hand to change" its po-V sition; Whenthe key 30 is locked in engagement with the plate inone ofthe openings 31101 '32, one of its shoulders or 23- will prevent' movement of the operating lever 12 in one direction, but the space between said shoulder pieces allows the o-perating'leve1' to swing freely, in the opposite direction with its brake shoe on one side pressing against the flange it. When the stop piece is changed with its key 30 inserted inthe otheroi said openings in the plate 7, the other of said stops 22 or 23 will prevent themove ment ofthe operating lever-12 past dead center in the other direction, but allow free movement of the brake member. 5, so that the other of said 'br'akeshoe buffers will apply its braking action; against the flange 4. The

object of providing this mechanism as de- SCllDGCl is so thata trip member such as C- I will release and cause'th'e setting of the brake when thesou'nd boX is playing out-- The collar 35 is formed with an outwardly projecting support 38 upon which is pivotally mounted by the bolt 39 the trip member 10.- This trip member has an upwardly pro jecting handle 42 on its outer free end and is formed with a spring member43 below thehead of the bolt 39, which retards but does notabsolutely revent the movement of the trip arm 40 on its pivot in a horizontal direction. The upturned shoulder piece 18 on the operating lever 12 of the brake and the outer free end of the trip member 40 are soarranged that as the tone arm 3 turns while the sound reproducing point carried by the sound box is movedforwardly in the sound groove of the record being played the edge of the trip member 40 will impinge against the shoulder piece 18'and force the operating lever 12 past dead center. The spring 15 will thereupon automatically set the brake and stop the turn table from revolving. 7

To adjust the trip member, so that it will".

-The point of the sound box should next be adjusted to the beginning of the sound groove and the brake moved by hand into releasing or neutral position as illustrated in Fig. 8. While the record is being played, 7

the sound box traveling toward the endof the sound groove will turn" the verticalportion of the tone arin3, causing the trip member 40to approach the houlder 18 until the end of the record groove .is reached, where upon the trip member. will release and cause.

the brake to be set. automatically. The op eration of. the device is very simple, and. the

adjustment of the parts to operatewith .dif-

ferent lengths of records can be easily attained by an unskilled operator.

hen itis'desired to operate the machine,

sothat the brake will be set automatically in the manner statedwhen the sound box travels outwardly instead of inwardly upon the record, the sleeve35 is shifted in position, i r

around the tone arm andthe bolt 36 tightened when the proper position is reached, so

that the turning of the trip member 40 will effect the release of the brake when a long or a short record is played. The stop piece 21 is then changed in position with its key 30 inserted in the other of the

openings

31 or 32. The adjustment for playing a record is then accomplished in the same manner de-,

scribed above, excepting that the trip mem-' ber etO-will strike against the opposite side of shoulders 18 on releasing arm 12, thus causing the other of the brake shoe buffers to V impinge against the flange 4c and stop the and 8, the trip member 45 is rigid with the clasp 46, said clasp being formed by a pair turn table revolving when the brake is set. In the construction illustrated in Figs. 7

of spring arms which are adapted to slip over the collar 47 into the circular groove 48. The outer free end of the trip member has a handle piece 49. The collar ,&7 is fastened upon the tone arm 3 by the screw 50 at proper elevation. Theadjustment of member 45, so as to release the brake at the proper instant is accomplished by turning the clasp in its groove 48. When it is de sired to change the position of the trip member 45, so that it will operate against the opposite side of the shoulder 18 or to re move the trip member entirely from the machine, it can be lifted out of the groove 48 without the use of any tools and without 7 loosening the screw 50. When desired the tone arm can be formed with a circular groove 51 in place of the collar 47 to receive the clas -46. v

In Figs. 9 and 10 a rigid supporting arm 54: is secured on the tone arm by screws 52 and a disk 55 eccentrioally journaled by the pin or bolt-56 passing through a supporting member 57 The supporting member is also rigidly mounted by the pin or bolt 58 on.

the inner end of the support 54 and the body of the arm 57 is formed with a down wardly pressing spring pawl 59 positively but releasably engaging with a circular series of ratchet teeth '60, so that when the I turned into adjusted'position by hand.

i Copies oithis patent may b obtainefl for disk 55 is turned, it is held firmly in adjust-ed position by said, pawl, but not sufficiently to prevent the disk from being use the disk is turned upon the support 54: to accomplish the function of regulating the trip member to release the brake at the'.

proper instant. In operation the periphery of the disk strikes the stop shoulder 18 to release the brake. The brake mechanism above may beuse d with orwithout myimproved trip described above and operated by It may also be used f with the shoe elements on the outside of the turn table and the double shoe buffers shown hand when desired.

five cents each,"b'y' addressing Washington, D. C." e

made to impinge or press against the outer surface instead of the inner surfaceof the flange. The brake may also when desired be constructed with only one shoe element instead of two in which event-the movable stop element 21 is unnecessary.

In accordance with the patent statutes, I

have described the rinciples of operation of my invention, together with the apparatus which I now consider to represent the best embodiment thereof, but I desire to have it understood that the construction shownis only illustrative and that the invention can be carried out by other means and applied to uses other than those above set forth within the scope of the following claims.

Having described my invention what I claim as new and desire to protect by Letters Patent is 1. The combination in a sound reproduc ing machine of a turn table, a sound box traveling element cooperating with said turn table, a brake'having means whereby it may be released from two directions to stop said 1 turn table, and means carried bysaid sound box traveling element for releasing said brake in either direction of travel of said traveling element.

ing said brake in either direction of travel of the sound box traveling element.

'3. A brake release, comprising, a support having an integral radiating arm adapted to be secured to a traveling swiveled element of a phonograph so that its free end will swing back and forth concentrically therewith and a. releasing arm pivotally secured to said radiating arm and movable tovcause ts outer free end to str1ke a brake release at a predetermined instant.

4. A brake release, comprising, a support adapted to be secured to the upstanding portion of the tone arm of a-sound reproducing machine, said support being'formed with a downwardly and outwardly projecting portion and a strikermemberfpivotally' sup ported upon the lower portion of-saidpro-j jection at a point close to the base of said tone armand adapted to be selectively po' sitioned about anaxison said lower projection to swing horizontally and actuate fa;

brake of a sound reproducing machine.

In testimony whereof, I -have signed my nameto this specification; 1

I FRANCIS A. NOLAN.

the commi sio e of Patents,

. 0' 2. The combination in'a sound box repro e