US981935A - Electric brake for graphophones. - Google Patents

Description

J. F. MEANS.

ELECTRIC BRAKE FOR GRAPHOPHONES.

APPLICATION FILED vAPR. 18. 1910.

Patented J an. 17', 1911.

2 SHEETS-SHEET 1.

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witnesses e' We).

J. P. MEANS.

ELECTRIC RAKE FOR GRAPHOPHONES.

APPLICATION FILED APB..18, 1910.

Patented 3311.1?,1911

2 SHEETS-SHEET 2.

. l mil WLM/Lesmo JOHN-F. MEANS, F OIL CITY, IPENNSYLVANLl ELECTRIC BRAKE FOR GBAPHOPHONES.

Specification of Letters Patent.

Patented Jan. 1'?, 1911.

Applicatonled April 18, 1910. Serial No. 556,000.

To all whom it mag/concern:

Bc it known that l, JOHN F. MEANS, a

citizen of the United States, residing at Oil City, in the county of Venango and State of Pennsylvania, have invented new and useful Improvements in Electric Brakes for Graphophones, of which the following is a specification. i

This invention relates to improvements in electric brakes for ,graphophones The prime object of the invention is to provide an improved construction of electric brake mechanism for graphophones whereby the machine will be automatically stopped.

Another object is to provide means whereby the circuit closing mechanism of the electric brake releasing mechanism may be adjusted to operate the brake when the needle has reached any desired place on the record.

With these and other objects in view, the invention consists of certain novel features ot construction, combination and arrangement of parts as will be more fully described and particularly pointed out in the appended claim. A

In the accompanying drawings: Figure 1 is a plan view of a disk graphophone with parts broken away and showing the application of the invention; Fig. 2 is a vertical l section ot the same on the line 2 2 of Fig.

1; Fig. 3 is a rear view; Fig. l is a vertical section of a portion o1c the machine showing the brake releasing mechanism on an enlarged scale: and, Fig. is a similar View showing an end elevation oi the electromagnets l'or operating the brake releasing devices.

Referring more particularly to the drawings l denotes the cabinet in which are arranged the motor and operating mechanism. Above the cabinet'and revolubly mounted therein is a turn table 2 on which the record disks are arranged and operated. On one side of the cabinet is secured the horn supportingbracket P3 in the upper end of which is pivotally mounted the sound transmitting horn 4 which carries the reproducer 5 having the record engaging needle 6. These parts may be ot the usual or any desired construction and do not form a part of the present invention.

My improved brake mechanism comprises a brake cylinder 7 which is mounted in any suitable position on the cabinet adjacent to the edge of the turn table 2. In the cylinder 7 is slidably mounted a brake piston or plunger 8 carrying on its outer end a brake shoe 9 which is adapted to be forced into engagement with the edge of the turn table for the purpose of stopping the same. The plunger or piston 8 is projected and held in an operative position by means of a .coiled spring 10 arranged around the rod or stem 11 of the piston within the casing 7 as shown. The outer end ot' the rod or stem 11 extends through and projects beyond the outer end of the cylinder 7 and has formed therein a stop notch 12 with which when the plunger is in a retracted or inoperative 'position is adapted to be engaged a suitable catch whereby said plunger is held in an inoperative position. .lhe outer end of the rod or stem 11 is preferably turned upwardly to i form a handle 13 whereby the plunger may be retracted.

The catch for holding the plunger in a retracted position comprises a cylinder lll which may be arranged in any suitablepo'sition and is here shown as being set into the top of the cabinet. Slidably mounted in the cylinder 14 is a piston or plunger 15 having on its outer end a stop linger 16 which is adapted to engage the notch 12 in the brake plunger rod when the latter is in a retracted position. The plunger or piston is provided with a stem or rod 17 which projects through the innei1 end of. the casing. Around the stem or rod 17 within the casing 14; is arranged a coiled projecting spring 1S the pressure oit' which is exerted to normally 'lor'ce the plunger outwardly in the cylinder thus moving the stop finger 1G to a position for engaging the notch 12 in, the brake plunger rod.

The outer end of the rod or stem 17 of the catch plunger is operatively connected by a right angular arm 19 with the armature 20 of an electromagnet 21 which may be arranged in any suitable position and which is here shown as being arranged in the cabinet 1 and supported by a bracket -or hanger 22 secured to the inner side of the -top of the cabinet. The armature is preferably hingedly connected to the bracket 22 as shown at 23.

On the cabinet adjacent to the outer end the .brake plunger rod 11 is a circuit breaker 24 one member of which'is in electrical connection with one pole of the magnet 21- by a conducting wire 25 while the other member of said circuit breaker is in electrical connection with a suitable battery 26 byl a current conducting wire 27. vThe battery 26 may -be arranged in any suitable manner but is here shown as being arranged in the cabinet 1. In the current conducting wire 27' between the circuit breaker and the battery is preferably arranged a spring contact terminal .28. The'opposite pole of the magnet 2l is connected to a spring contact terminal 29 by acurrent conducting wire 30.

With the terminal 29 is connected a current .conducting wire 31 -which leads to acentact switch hereinafter described. The other ter- -minal of said switch is connected to the battery; 26. by a current conducting wire 32. When the brake plunger rod 11 is retracted to an inoperative position and is engaged by 1the stop linger 16 the outer end of saidplunger rod will engage the circuit breaker 24 and close the same.

The circuit closing switch'- for the electroi magnet as here lshown preferably consists of a bracket 33 secured to one side of the cabi- .net 1. 0n the bracket 33 is arranged a bindl ,ing screw 34 with which is connected the terminal of the current conducting wire 32 from the battery. In the upper end of the bracket 33 is adjustably mounted a contact'l screw 35 which rforms one terminal vof the switch. The other terminal of the switch's inthe form of an arm or bar 36 .which is secured to the horn 4i and is moved thereby as the latter swings back and.. forth over the record with the movement of the needle. In the bar 36 is arranged a bindin screw v37 with which is connected the terminal of the current conducting wire 31 cf the electroma net.

n using fthe device the horn is first swung .ever the record until the needle is in positionV to engage the end of the thread or-groove :formed in the record after which when the .parts are in `this position the contact screw 35` is screwed through the bracket 33 until the end thereof comes into engagement with the -switch bar 36 carried by the horn. After the screw/ 35 has thus been adjusted the arm is swung back until the needle is inposition to engage the beginning of the thread or groove ofthe record. The brake plunger 8 is retracted to disengage the brake shoe 9 from the turn table whereby the latter is pern'iittcd to revolve. The brake plunger is held in a lretracted position by the stop finger 16 as hercinbefore described and when said plungcrlis retracted the outer end of the plunger rod or' bar 11 will close the circuit breaker 24 and hold the same in closed position until the plunger rod is released by the movemcnt ef the stop finger. W ith" the parts in this position .the Aturn table will continue to revolve until the needle has reachedthe end of thegroove or thread on /the record or any other point where it vis desired -to stop the' machine at which time the switch bar 36 will be brought into. engagement-with the contact screw 35 Vthereby completing 4the Y circuit to the electro-magnetthus energizing the same and causing said plunger 18 downwardly thereby disengaging this. application is simply'shown for illustrativepurposes and'I do notwish to be understood as coninin myself to the us'fof the switch in this vsty eof -machineI .as the same mayl be readily lapplied to a cylinder machine and the brake mechanism arranged thereon' in positionto engage the record mandrel or other movingpart of the machine whereby the machine will be stopped.

From the foregoing description taken in connection with the accompanying drawings,' the construction and operation of the out requiring a more extended explanation. Variousnchanges in the form, roportion andthe minor details of constructlon may be principle' or sacrificing any of the advantages of this invention as defined in the appended claim.

v 4Having thus described myinvention what 1 claim is:

comprising a cabinet with a turntable thereon, a brake cylinder 'secured to the cabinet, a s ring actuated stem mounted in the cylin er having a plunger thereon, a brake shoe on said plunger adapted to contact with said table, said stem also having a notch therein, a device for holding the above named plunger in retractedposition consisting of a cylinder and having a plunger thereon provided with an upwardly projecting 'finger adapted to engage said notch, said projectfmagnet to 'attract the armature 2 0. The movement of the armature will pull the.

shown' anddescribed as applied to a disk record machine. it will be .understood that* resorted' to without departing from the cylinder provided with a spring actuated stem projecting through the inner end of the the stop finger 16 from the notch 12 in the invention will be readily understood 'with- A structure of the character described iao.

ing end of the Vsten' having a right angular In testimony whereof I have signed my arm thereon prowded wlth nn armature, 'name to th 1s specifica/clon in the presence of magnets for actuating the same, a sound box, two subscrlbing wltnesses.

a swinging arm carrying the same, contacts, OHN F. MEANS. 5 one of'wheh is carried by said arm, and a '\Vtnesses: Q

source of energy for energizing said mag- A. L. CONFER,

nets when said contacts are closed. E. W. CHASE.

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