Патент USA US2132992код для вставки
Oct- 11, 1938. B. MISHELEVICH HAL 2,132,992 HOLDING MEANS FOR INSTRUMENTS ‘ Filed Jan. 8, 1937 N a 21 N 20 Insulazfior? N _ _ INVENTORS Berg/0min lJ/releuic/z BY an nkola z'c/I THEIR ATTORNEY Patented Oct. 11, 1938 2,132,992 UNITED STATES PATENT OFFICE 2,132,992 HOLDING MEANS FOR INSTRUMENTS Benjamin Mishelevich, Pittsburgh, and Branko Lazich, Penn Township, Allegheny County, Pa., assignors to The Union Switch & Signal Com pany, Swissvale, Pa., a corporation of Penn sylvania Application January 8, 1937, Serial No. 119,656 4 Claims. (Cl. 200—104) Our invention relates to holding means for in shaft is biased by means of the pendulum. The struments, and particularly to holding means counterweight 5t is arranged to be locked in an whereby the movable member of an instrument adjusted position by means of lock nuts 5' one of such as an electrical relay may be effectively which is screwed onto the post 5° on each side 5 locked against movement during shipment or of the counterweight. handling of the relay to prevent damage which The previously referred to motor. device M for might otherwise result from such handling or oscillating the rockshaft 4 comprises van arma shipment. More particularly our present invention re lates to holding means for locking against move ment the oscillating member of a relay of the type known as a ?asher relay in which the rate of oscillation of the oscillating member when the relay is operating is controlled by a compound 15 pendulum having considerable mass. We will describe one form of relay having ap plied thereto one form of holding means embody ing our invention, and will then point out the novel features thereof in claims. 20 In the accompanying drawing, Fig. l is a view partly in side elevation and partly in section showing one form of relay having applied thereto one form of holding means embodying our inven tion. Fig, 2 is a view partly in end elevation and 25 partly in section of the relay shown in Fig. 1. Similar reference characters refer to similar parts in both views. Referring to the drawing, the reference char acter A designates an insulating top plate, which 30 top plate supports allof the operating mechanism of the relay. Suspended from the top plate A by means of hangers I is a cast rectangular frame 2, and journaled at its ends in suitable bearings 3 mounted in the frame 2 is a rockshaft 5. This 35 rockshaft is, biased to one position by a com pound pendulum P, and is arranged to be oscil lated at a predetermined frequency which de pends upon the proportioning and adjustment of the parts by means of a suitable motor device M~ 40 which we will describe presently. The compound pendulum P may have any suit able form but in the form here shown, this pen dulum comprises a cast U-shaped bracket 5 the upwardly extending arms 5' of which are pinned 45 to the rockshaft 4 intermediate their ends, and are provided at their upper ends with enlarged ' portions 5') to provide the desired mass. A de pending threaded post 5° is secured at its upper end within a boss 5'1 formed on the under side of 50 the yoke 5e of the bracket 5, and this post car rles a counterweight 5t which is mounted eccen trically to the post 5°, and which serves both as a means for regulating the period-of oscillation of the rockshaft within certain limits and also as a 55 means for varying the position to which the rock ture 6 which is pinned to the rockshaft l at one side of the bracket 5, and an electromagnet which cooperates with the armature 6. This electro magnet may have any preferred construction, but in the form here shown, this electromagnet comprises a winding ‘I mounted on a backstrap 8 secured to the short arms 9“ of L-shaped pole pieces 9, the long arms 9b of which extend up 15 wardly past the opposite sides of the armature 6 and are secured to depending lugs 2a formed on the frame 2. The angular disposition of the armature 6 with respect to the rockshai’t 4 is such that, when the rockshaft occupies the posi 20 tion to which it is biased by the pendulum P, the longer axis of the armature will be inclined ver tically at an acute angle with the magnetic field which is set up between the pole pieces »9 when the winding 1 is energized. The relay also comprises a plurality of contacts I0 of the well-known mercury type comprising a pair of electrodes disposed in an evacuated glass bulb containing a quantity of mercury which ?ows into or out of engagement with the elec 30 trodes to make or break a circuit passing through the electrodes. These contacts of which only four are visible in the drawing are mounted in clips il secured to the yoke 5° of the bracket 5, in such manner that oscillation of the rockshaft 35 through its intended amplitude will cause these contacts to become alternately opened and closed. To facilitate making electrical connec tion with the contacts, the electrodes of the con tacts are connected by means of ?exible con 40 nectors I2 to terminal posts i3 mounted on the top ‘plate A, the connections being held in the proper spaced relation adjacent their lower ends by insulating members l4, l5, and I6 in the man ner shown. Two of the contacts l0 which are disposed on 45 opposite sides of the rockshaft 4 constitute the operating contacts of the relay, and these con tacts are so arranged that, if they are connected in series with the winding ‘I in a control circuit for the relay, the electromagnet will become al ternately energized and deenergized in a manner to cause the rockshaft to oscillate at a constant predetermined frequency which depends upon the adjustment of the counterweight 5’. 55 2,132,992 Two metal stops [1 are secured to the opposite Sides of the frame 2 directly opposite the one arm 5a of the bracket 5, and these stops cooper ate with the enlarged portion 5b of the arm to limit the extreme positions to which the rock post 5° is within the cup in the locking member, all of the oscillating parts of the relay will then be securely held in the positions which they then occupy, so that damage to these parts caused by handling of the relay will be effectively'pre shaft 4 is free to rotate. vented. . > I The operating ‘mechanism of the relay is all ' One advantage of holding means embodying our'invention is that it provides a simple and enclosed within‘ a suitable casing 20 which in the form here shown is a box-like- metal casting, effective method for protecting the relay during l0 10 three of the sides of which are provided with glass ‘ shipment. windows 2! through which the operating mecha nism may be viewed. The casing is held in posi tion against the under side of the top plate A by Another advantage of holding means embody ing our invention is that, when the relay is placed in service, the locking member remains attached means of screws 23 which pass through clearance to the relay where it is always available for use holes provided in the bottom of the casing, ‘and are screwed into tapped holes provided in the lower ends of depending legs 24, the upper ends whenever the relay is to be transported. ‘A further advantage of holding means embody of which are secured to? the under side of the ‘I ber remains in the, hole 26 in the case when the 15 ing our invention‘is that, since the locking mem relay is in service, it is impossible for dirt to enter 2. ' 1 The ?asher relay thus far described is disclosed ‘ the relay through the hole which is provided for 20 frame 20 ' and claimed in the copending application for Letters ‘Patent of the United States, Serial No. 182,506, ?led by Arthur W. Fisher and Benjamin Mishelevich, on December 30, 1937. As will be apparent from the foregoing de .25 scription', the various parts of the relay which are mounted on the rockshaft 4 possess consider able mass, and unless some means are provided for preventing the rockshaft from swinging dur 2-30 inghandling of the relay, damage is likely to result to the bearings which support the rock shaft, to the mercury contacts ID, or to the other parts of the relay. The means here shown for the. locking means. . . ' Although we have herein shown and described only one form of holding means embodying our invention, it is understood that various changes and modi?cations may be made therein within 25 the scope of the appended claims without de parting from the spirit and scope of our inven tion. Having thus described our invention, what we claim is: V 1. In combination, an instrument having a ‘?xed part provided with a screw threaded hole and a movable part provided with a. projecting post, a screw threaded member screwed through the hole in the ?xed part and provided with a cup which is adapted to receive one end of said ?ange 25a'and with an axially disposed opening post when said member is screwed to one posi 25“ which forms a cup, and the lower end of . tion to lock the movable part in a ?xed position, - preventing movement of the rockshaft comprises '35‘ an externally screw threaded locking member ' ‘25 the upper end of which is provided with a ‘which is. provided with a saw kerf 25° for the reception of a screw driver to facilitate rotation of the member 25. The member 25 is screwed through a tapped hole 26 formed in the base of the casing 2|, in such a position that the axis of the opening 25* will align with the axis of the 45 post 56 when the rockshaft ll occupies the posi tion to whichit is biased by the pendulum P, and and a lock nut screwed onto said screw threaded member to lock said member-against rotation. 40 2. In combination, an instrument having a ?xed part provided with a screw threaded hole and a movable part provided with a projecting post, a locking member screwed through the hole in the ?xed part and provided in one end with a 145 ‘cup and in the other end with a saw kerf for mounted on the locking member on the under rotating said member, said locking member be iside'of the base of the casing 2! is a jam nut 27 by means of which the member 25 may be locked ing rotatable between a locking position in which the cup receives one end of said post and‘ an unlocking position in- which said member is out of the path of movement of said post, and a lock nut on said locking member for securing said member in a ?xed position relative to said '50 ‘in the position to which it is rotated. To prevent removal of the nut 26 after the locking member 7 ‘25' is assembled within the hole 26, the-threads at the~lower end of the member 26 will usually be jammed. ‘55 g The operation of the holding means embodying our invention is as follows: When it is desired ?xed part. 1 3. The combination with a. relay comprising a" an oscillatable shaft, a pendulum secured to said ‘shaft for timing said shaft and having a project ‘25 is screwed downwardly to the position in ' ing post carrying a counterweight for varying ‘which the ?ange 25a engages the base of the the period of said pendulum, motor means'for oscillating said shaft, and contacts controlled by £60 60 ‘casing 2|, in which position it is shown in the drawing, and the jam nut 21 is then tightened the oscillation of said shaft all enclosed in a to secure the locking member in this position, casing, of means for preventing movement of the parts being so proportioned that, when the ‘said shaft during shipment comprising a locking locking member occupies this position, it will not .member screwed through "a threaded hole formed interfere with the normal operation of the relay. in said housing, said member being provided in 365 When, however, it is desired to move the relay its upper end with a cup for at times receiving about, as inv shipment, the jam nut 27 is ?rst the free end of said post and being movable be backed off until it engages the jammed threads tween a locking position in which said cup re at the lower end of the locking member, and the ceives said post and an unlocking position in ' which said locking member is out of engagement 70 locking member is then screwed upwardly to the -to- place the relay in service, the locking member position in which the cup formed by the opening with said post. 25b receives the lower end of the post 5°, where upon the jam nut 21 is again tightened to hold ' 4. The combination with a relay comprising an the locking member in the locking position which 75 it then occupies. vIt is obvious that, when the 7 . ~ 'oscillatable shaft, a'pendulum' secured to said shaft for timingsaid shaft and having a project ing post carrying a counterweight for varying 75 2,132,992 the period of said pendulum, motor means for oscillating said shaft, contacts controlled by the oscillation of said shaft all enclosed in a casing, of means for preventing movement of said shaft during shipment comprising a. locking member screwed through a threaded hole formed in said housing, said member being provided in its upper end with a cup for at times receiving the free 3 end of said post and being movable between a locking position in which said cup receives said post and an unlocking position in which said locking member is out of engagement with said post, and a jam nut screwed on said member for securing said member against rotation. BENJAMIN MISHELEVICH. BRANKO LAZICH.