US2425487A - Dispensing apparatus - Google Patents

Description

Aug. 12, 1947.

C. F. PEASE DISPENSING APPARATUS' Filed Jan. l, 1945 e sheets-sheet 2 zfelzar Ze. sffeas Ae,

grw.

c. F. PEAsE 2,425,487

v DISPENSING ArPARA'rUs Aug. 12, 1947".

6 Sheets-Sheet 5 Filed Jan. s. 1945 F 83 6 y j 99 Aug. l2, 1947. c. ,F. PEASE DISPENSING APPARATUS 6 sheets-sheet 4 Filed Jan. 8, 1945 7 M a d 1w m w w/h3\ M J 4, w of .HC lll 0 J e 1. ,A 1 HWIWWH www- 4 Ill 6.16 Ital l im Il J 91 1,. 9 w M 7. 36 9 .c F. PEAsE DISPENS'ING APPARATUS Aug'., 1-2; 1947.

6 Sheets-Sheet 5 Filed Jan. 8, 1945 Aug. 12,1941.

' DISPEHSINQ APPARATUS Filed Jan. 8, 1945 I 6 Sheets-Sheet 6 IN VEN TOR. Y

flarlesj'feaise,

C. F. FEASE.v 4 2,425,487

Patented Aug. 12, 1947 UNITED STATES PATENT OFFICE 4 Claims.

My invention relates to improvements in dispensing apparatus of the general character described in my copending applications, Serial No. 465,775, filed November 16, 1942, which matured into Letters Patent No. 2,370,684, March 6, 1945, and Serial No. 488,131, iled May 24, 1943, which has become Patent No. 2,410,231, of which the present application is a continuation in part. My invention employs a plurality of dispensing units and operating mechanism therefor which is controlled by a suitable coin control, such as is disclosed in my companion application 465,775, or any other type which might be used for contro-lling the operation of a plurality of dispensing units.

An object of this invention is the production of a multiple connecting structure between a coin control and a plurality of dispensing units by which only a single unit at a time can be operated and whereby more than one coin of different denominations can be employed for operating any selected group of diierent units.

A further object is to provide improved actuating means which functions through the operation of coin controlled dispensing units and which positively block the operation of al1 but one of the dispensing units at a time. `A further object is to provide actuating means of a character which permits the assemblage of a maximum number of dispensing units in a single compact structure and which permits the ready removal and changing of any of the dispensing units without disturbing the actuating means.

Among still further objects are maximum simplicity of construction and effectiveness in use.

ln the accompanying drawings forming part of this specification, Fig. 1 is a front elevation of one of my improved vending machines which is provided with an assemblage of dispensing units which are arranged in two vertical rows; Fig, 2 is a rear elevation on an enlarged scale looking at the inner front side of a portion of the cabinet and showing my improved coin control and a portion of the operating mechanism for controlling the dispensing units by the coin control; Fig. 3 is a side elevation showing my improved coin control, such as disclosed in my companion application Serial No. 465,775, combined with my improved dispensing unit operating mechanism, two only of the dispensing unit actuating devices being shown; Fig. 4 is a section on an enlarged scale, taken approximately on the line 4-4 of Fig. 2; Fig. 5 is a front elevation of a portion of the apparatus shown in IFig. 4; Fig. 6 is a section taken approximately on the line 6 6 of Fig.

4; Fig. 7 is a section of a detail taken approximately on the line 'l--l of Fig. 4; Fig. 8 is a section of a detail taken approximately on the line 8 8 of Fig. 4, showing the controlling catch in lowered position; Fig. 9 is a diagrammatic view illustrating the action of the catch; Fig. 10 is a side elevation vof part of the coin control, when the parts shown are in normal posit-ion and illustrating only the penny chute for greater clearness and a penny in position therein when about to be released through the action of the operating catch J after one of the dispensing unit actuating members I3 has been pulled out in the act of operating, a portion of the coin 4disc being broken away; Fig. 11 is a side elevation somewhat similar to Fig. 10, showing only the five cent coin chute and an appropriate coin in position, the latch H being removed and the lock pawl swung from locking position to permit the lowering of the catch F; and Fig. 12 is a side elevation of a portion of the coin control combined with a portion of the multiple dispensing unit control, a portion of the face frame of the cabinet and two of the hand operable actuators being shown.

In Fig. 1 a type of vending machine is shown having a suitable housing or cabinet A, containing two upright series of dispensing units B of any suitable type, which are represented in part diagrammatically in Fig. 2. These units are detachably secured in openings 23 and 24 in the face panel l0 and are contained in the cabinet A by the rails l 'l and clasps C (Fig. 2.), in the manner described in detail in my companion application Serial No. 488,131, to which reference is made. These units may be of similar or diirerent types but are of substantially corresponding size and shape, some of which are illustrated in my companion applications, Serial No. 464,452, led November 4, 1942', which has matured into Patent No. 2,388,497, and Serial No. 464,838, filed November 7, 1942, which has matured into Patent No. 2,382,576. These units are adapted to be operated through the use of coin -control means, one type E being described in detail in my companion application Serial No. 465,775. Suitable coin receiving slots Il and I2 are provided in the face I0 of the cabinet through which coins of selected denomination, such as pennies and nickels may be deposited for controlling the operation of the various dispensing units. Suitable hand operable pull rods such as I3 (Fig. 3) are provided in the face panel for the operation of any selected dispensing unit. A 4coin return push plunger i4, accompanied by a coin return receptacle I5 is also provided in the face panel IIJ. The coin return mechanism is omitted from the present application.

Each dispensing unit has associated with it an actuator D, in which the hand operable pull rod I3 is reciprocable, said device having a suitable rigid frame member I6 secured to the face panel in the cabinet. Each pull rod has a hand piece I8 exposed on the front of the cabinet which en ables one to operate one of the dispensingunits. Each actuator is fixed ypermanently in the cabinet in position corresponding with a dispensing unit to be operated and is provided with a swinging lever arm I9 which is tilted'when the rod I3 is reciprocated. This arm has a pair of wings or flanges 20, which are spaced apart on its free end to freely engage pin 2| and thus provide an .Oper- Y type disclosed in detail in my companion application Serial No. 464,838, filed NovemberA 7, i942. The pull rod I3 xedly supports a collet block'25 on the lower'side of which is a boss 26 and on the upperside a longitudinal series of ratchet teeth 2'I. The actuator has a rigid depending member 28'on the lower end'of which the arm I9 is pivoted and to the free end of said arm the boss 26 is connected by a link 29, so that when the pull rod is reciprocated by hand the drive lever is swung up or down. An expansion spring 3l) is threaded over the shank of the pull rod I3 between the forward portion of member I6 and the collet block. This spring permits the pull rod I3 to be drawn outwardly and swing the drive arm down or cause the return of the drive arm into raised' position. A complete forwardY and returnV stroke during each operation of the machine is assured by a spring controlled pawl 3I which sweeps 'over the ratchet teeth 21 on the collet block 25. n

Inmounting the parts on the cabinet the actuator D for each dispensing unit is positioned so that the shoulders 2i! engage and cooperate freely to accommodate one cent coins.

with the pin 2|, thus causing the functioning of the dispensing units in the manner stated. It should be noted that the drive lever arm I3 is connected by a link 32 and pivoted clamp block 33 to one of Va group of vertically disposed control rods 34 by which the operation of the dispensing unit actuators D are permitted to function under the control of a suitable coin control unit. Also that two groups F and G of control rods 3B are provided, one group for each vertical series of dispensing units. These groups are brought into cooperative relation by certain operating means which coactively forms part of the subject matter of the present application and has been divided from my parent application Serial No, 465,775.

The dispensing units B Vare readily removable and replaceable by releasing or closing the clasps C and removing or applying said'units with the pins 2| on their operating thrust arms 22, freely adjusted in relation to the wings or anges 20 on arm I9 of the actuator D. Y

The coin control Ylil as shown resembles in part the4 corresponding apparatus disclosed in my companion application Serial No. 465,775, and is adapted to control the operating latch I-I, lock stop pawl I, and catch J (see Figs. 10 and 1l), through the functioning of a multiple control lock K, forgnormally blocking the operation of all but way 36 (Figs. 10 and 1l), leading from suitable chutes 31 and 38 for coins of different denomina-V tion, said chutes being movably mounted on a coin control unit frame L and connected with the coin receiving slots II and I2 in the mannerrdisclosed in 'my companion application Serial No. 465,775, the chute 3'I being of suitable size to accommodate ve cent coins and the chute 38 of sutablesize Thesechutes are suitably mounted to move into registration with the coin pathway under the functioning of the device as set forth in the aforesaid applications.

40 in its perimeter for holding the coins `and is revolved step by step forwardly as each coin from one of the chutes is received into the cups by suit able ratchet mechanism to be hereinafter referred to.- Arranged in an arc about the perimeter of the coin disc and tiltingly'mounted to rock by its lower end on a stud bolt iii, which is secured toa suitable body frame 42 is a coin stepping rocker arm 43. The outer circular margin of the rocker arm 43 is provided withV a circular series of coin escapement segments M. These segments,` in co-Y operation with the escapement disc 39 and the operating arm 43 provide the circular coin channel or path 35 downwardly through which the coins are caused to pass step by'stejp through the series of segments and to be ejected downwardly into a delivery chute 45 leading outwardly.

Normally the lock pawl I prevents the operation of arreciprocable push pin key plate-53 and its catch J suiiiciently to permit the latch H to function. This latch when engaged and operated each time by the catch J, actuates suitable ratchet mechanism on the coin control, which in turn rotates the coin disc 39 a step forwardly. The ratchet mechanism consists of the ratchet disc 48 which is rotatably mounted upon the stub shaft 43 and rigidly attached to and carries the coin disc, said shaft being mounted upon the coin control unit frame L. The ratchet disc has a series of teeth 5E! in its periphery with which the ratchet pawl 5I engages. The body of -this pawl is pivoted at 52 upon one end of the coin ejector rocker arm 53, the median portion of which is tiltingly mounted upon shaft 49. Ther opposite free end of arm 53 has an upwardly extending shoe 56 which is reciprocated in an arc each time the rocker arm 53 is reciprocated by the ratchet mechanism. The spring 55 releasably presses the pawl into engagement with the teeth of the ratchet Wheel. The end of the rocker arm which f carries the shoe is operatively connected with the latch H by the link 56. ratchet lock release arm 51 which normally engages a beveled catch 58 on the side of a pivotedk The screw connections 65 and 66 at the upper The coin control E provides a suitable coin path- 'Y This link carries a spring and lower ends of link 56v are loose and the lower end of said link has a leaf spring 61 on its side below the lower connecting screw element. These loose connections permit the lower end of link 56 to tilt laterally so as to permit disengagement of the ratchet lock release arm 51 from the beveled catch 58 on said lock arm. The leaf spring 51 tends to hold member 51 in engagement with said beveled catch 53 but permits member 51 to slide over the end of and reengage catch 58 as the lock release arm 59 swings on its pivot support and returns to normal engaging position. The tilting of link 56 laterally to discharge the ratchet lock release arm 51 from catch 58 is caused by a beveled shoulder 68 on the side of member 59. The ratchet mechanism thus provided cooperates with latch H, whereby as the link 58 is drawn down by the operation of latch H, the ratchet pawl 5I revolves the coin escapement disk 38 a step forwardly a distance corresponding with one coin release segment 44 during each operation. In this manner, when a five cent coin 13 is used and one cent articles or packages are dispensed, five operations of one or different dispensing units are provided automatically by my improved coin control.

The one cent coin control which is operated each time a one cent coin enters chute 38, in conjunction with part of the ve cent coin control apparatus above described by the pull element I3 of any one of the dispensing units B, consists in part as follows: The shoe 54 on rocker arm 53 has a shallow coin receiving socket 'Ill which normally registers with the lower end of the one cent coin chute 33 so that each one cent coin, such as 69, when dropped through chute 38 is retained by the shoe while lodged against the antifriction guide roller stop 14. When a dispensing unit is operated by member I3, the coin is shifted forwardly by the shoe in cooperation with the push element 43 on the upper end of the stepping arm 43 and is thus pressed against guide roller 14 so as to swing the escapement rocker arm 43 outwardly sufciently to in turn swing the lock pawl I away from a position blocking the downward thrust of the operating catch J. Forward movement of the upper forward end of the operating arm 53 and its shoe discharges the coin directly into the delivery chute 95 (Fig. 3), which is supported by the escapement rocker arm 43, said chute 95 being omitted from Fig. 10. The delivery chute 95 serves to Ideposit the coin in a suitable receptacle (not shown). The throw of the upper end of the coin operating rocker arm 53 forwardly by the operation of a dispensing unit is produced by the ratchet mechanism above described and in the same manner and through substantially the same distance as when the apparatus is operated by the use of either a one or ve cent coin. When the shoe 54 returns to normal position any immediately subsequent coin in either of the chutes 31 or 38 will drop into the coin socket in said shoe. Due to the superimposed positioning of the outlets from chutes 31 and 38 and to the superimposed positioning of the stop roller 14 above the coin channel, the one and ve cent coins are projected forwardly by the operation of the shoe into their respective paths.

The upper end of the coin escapement rocker arm 43 is swung inwardly and normally held adjustably depressed against an edge of the body frame below an adjustable stop 15 (Fig. 12), by a retractile spring 16 so as to dene the width of the channel or pathway between the cups in the coin disc and rollers 14 and 11, whereby five cent coins entering the upper end of the pathway are permitted to escape downwardly step by step by the segments 44, while the co-in escapement rocker arm 43 is reciprocated successively and while the coin disc is correspondingly stepped forwardly by its ratchet drive. The stop 15, it will be noted is mounted upon the upwardly swinging end of the rocker arm 43. A projecting portion 18 of the lower end portion of the rocker escapement arm i3 carries an actuating pin 19 which slidingiy engages in a guide slot 8l] through an offset portion of the lock pawl I. Said lock pawl is hung freely by a pivot support 8| on one side of a lower portion of the body frame L. The lower end of the lock pawl I has a shoulder 82 which is held in the normal position of the coin escapement rocker arm d3, below and in the path of the catch J on the key element, to normally block the operation of the ratchet mechanism and all of the dispensing units under the influence of either a one or ve cent coin and through the subsequent action imparted by the actuating stud 19. Y

The coin control unit E which controls the 0peration of all of the dispensing units contained in the cabinet A is removably secured in the latter in the manner set forth in my companion application Serial No, 488,131, the frame L being separably fastened to the back of the face panel i@ by the hand operable bolts 8l and 82' while the latch H and lock pawl I are juxtaposed in functioning position in relation to the catch J, to assist in controlling the operation of the dispensing units when either a five or one cent coin is deposited in the coin chutes.

In the manner above described and as more particularly set forth in my companion application Serial No. 465,775, if a one cent coin is dropped in chute 38 and is released by a single pull of any one of the hand propelled actuating elements I3, it immediately drops into the delivery chute 95 or if a ve cent coin is deposited in chute 31 it is caused to travel through the coin path and step by step mechanism by reciprocating any one of the actuating elements I3, thus successively operating any one or several of th'e operating rods 34, one at a time, until the coin is released from the lower end of the escapement rocker arm 43 into the coin delivery chute 45. The invention is thus applicable for controlling any desired number of dispensing units and is incorporated into a unit structure from which any one or more of the dispensing and coin controlled units can be easily and quickly detached and reassembled, thus enabling any desired combination of units to be assembled in the machine. To control the operation of a large number of dispensing units in a single machine, I provide two groups F and G of dispensing unit control rods 34. The upper portions of these rods are vertically reciprocable and guided freely through th'e guides 85 on the supporting arms D of the vertically arranged series of actuators. The lower ends of these rods are vertically reciprocable in suitable guide openings in the hori- Zontal arms 83 and 89 of the yoke frame M of a multiple control lock base as illustrated in Figs. 4 to 8 inclusive. Each of the horizontal arms of the lock base is equipped with a set of Control rods 34 and the capacity of the apparatus which is controlled by a single coin control unit thus increased. Each of said arms of the lock base has a longitudinal cylindrical socket which contains a series of tumbler balls SI of corresponding size. The lower end of each control rod normally registers with a tumbler ball of the series in the socket. The vertical guide openings 81 in each of said arms 83 and 89 of the lock b-ase provides suitable bearings for normally holding the lower ends of the control rods evenly spaced horizontally apart with one end of each rod above one side of one of the balls. Only suficient free space longitudinally in the sockets is provided to permit one control rod at a time descending between and below the tumbler balls as shown diagrammatically in Fig. 9. The remaining tumbler balls are retained in blocking position to prevent the remaining operating rods 34 and their coupled dispensing units from being operated. In this manner, an automatic single operating rod multiple control gate is provided for controlling the operation of the control rods so as to permit the operation of onlyV one correspnding dispensing unit at a time.

The two sockets 9S and series of tumbler balls Sl in each are provided with a connecting walking beam 93 which is pivoted by the bolt 94 on the lock supporting yoke frame M below the yoke to permit free horizontal movement (Figs. 4, and 8). The opposite ends of the walking beam 93 carry adjustable stops 95, which enter th'e open ends of the sockets 9i) near the ends of the two series of tumbler balls therein to transmit motion from one section of the tumbler balls to the other. In this manner the two series are connected and function as one. The adjustments shown provide forv therclose regulation of the free space in the sockets so that only one operating rod and its companion dispensing unit at a timecan be operated. It will be noted that the lower end of each' operating rod 34 is tapered downwardly at 96 (Fig. 9), to provide a guide against the side of the corresponding ball in registration therewith in the socket below, whereby the rod "5A which is operated by a selected dispensing unit acts as aV key by plunging downwardly between and Separating the tumbler balls sufficiently t0 permit a full stroke While the remaining balls of the cornplete chain block the remaining control or key rods and theirconnected dispensing units from operating. Y

EachY key control rod 34 is divided into upper and lower sections which are adjustably secured longitudinally by threaded engagement with a coupling 9'?, to provide longitudinal adjustment. Each coupling has a laterally extending coupling block 98 (Figs. 2, 4 and '7) the several blocks being urged upwardly against the rigidly supported angle stop arm 99, which is supported by the companion arm of the yoke M or base. A downwardly extending push pin llil is secured rigidly t0 each coupling block 98, said pin being omitted from Fig. 7 for greater clearness in showing the complete set of key operating rods 34. The lower end of this push pin reciprocates freely through and is adjusted to project below members 88' and 8# of the lock base yoke M when urged downwardly by the companion operating rod 34. Each key operating rod 3d is provided with an expansible helical spring I Ill between the block 98 thereon and the surface of the arm K below of the yoke frame'M, to' hold the control rods 34 in normally raised position with their lower ends Vsubstantially out of contact with the tumbler balls as shown in Fig. 7 and with' the companion push pin |00 raised upwardly into the corresponding arm K of the yoke M as shown in Fig. 6. The yoke frame M which is supported by the cabinet frame structure is rigidly mounted by the upstanding posts IEiZ of the supportingY cabinet frame by the screw and frame connections ID3. This supporting frame has a pair of upstanding stationary guide pins Illll for a carriage |05 which is Vertically reciprocable and carries on its lower end the integral key plate 46. This key plate regisj ters upwardly against the lower ends of all of the push pins IUD and is urged into superior p osition by the expansible helical spring ID3. The key plate d6 can thus be pressed down into lowermost position 'as shown in Fig. 8, by the downward thrust movement of any one of the push pins |00 which is permitted by the chain of tumblery balls Operation It is noted that all of the thrust operating rods 3l! are normally retained in raised position as shown in Fig. 7, above the members Vof the chain of tumbler balls SI and that the push pin operated key plate e@ is retained under the influence ofthe expansion spring IBS in elevated locked position as shown in Fig. 6, by the lock pawl I which Yengages below the catch J as shown in Fig. 10. In this condition and in the absence of a suitable coiny being deposited in the machine all of the hand oper-able pull elements I3 are prevented from being operated to actuate any of 4the dispensing units, due to the locking key plate 46 being held immovable in the position shown in Fig. Y

6 by Vthe lock pawl. Also the operating latch H rests in a position below to be engaged by the catch J when the key plate is pressed downwardly by any one of the push pins I E during the operation of any one of the dispensing units. During the rest period ofthe dispensing vunits the chain of balls SI remains inactive while the push pins are held above them by the springs IIlI and theV springs 3B on the operating pull rods I3.

When a suitable coin is deposited in either of the coin slots Il and I2. and enters the shoe 54 against the guide rollers 14 and the operating pull rod I3 of any one of the dispensing unit actuating devices D is pulled outwardly by the corresponding hand piece I8, the coin is projected forwardly by the coin ejector 43 against the guide roller Ill and released by the swinging movement of the rocker arm 43. The motion of the rocker arm also releases the lock pawl I by the pin 'I9 through the swinging movement of said arm and permits said'arm which is connected by link 32 with arm I9 of one of the actuating units todepress the push pin key plate 46 and swing the latch H down. The stroke of latch H is transmitted to rocker arm i3 and the ratchet mechanism to operate the latter. This operation is controlled by the chain of tumbler balls which permits only one dispensing unit at a time to function, the remaining operating rods and their Y vate-d position by its spring above the tumbler balls, leaving the machine in readiness for either another dispensing unit to be operated by depositing a suitable coin in the machine, or for the dispensing unit which has been operated to be successively operated, provided a suitable coin has been deposited in the machine to permit successive operation. In the latter case assuming that a ve cent coin has been deposited in the machine the coin is released through the coin path step by step by the coin release segments 44 and each time the chain of balls permits any one of the dispensing units in the machine to function one at a time while the remaining units are blocked from operating.

The tumbler balls being assembled in two groups which are connected by the yoke 93 lpermits the operation of two groups of dispensing units in a single machine by a single coin control E, thus economizing space and reducing the amount of mechanism and corresponding reduction in expense in production. They also permit the operation of any single dispensing unit of the entire group and permit the operation of a single dispensing unit a number of times by the use of a single coin or a number of Ydifferent units by a single coin. In the latter case one of the dispensing units can be used to dispense coins to make change, a coin dispensing unit of this character forming the subject matter of an application for patent about to be i'lled by applicant. For instance if a ve cent coin is deposited in the machine and only two one penny units are operated, three pennies can be dispensed as change by the coin dispensing unit.

The above apparatus is susceptible by slight modification of being operated by a coin of ve, ten or larger demonination, to dispense yarticles through a selected number of operations of the dispensing units. Also the parts may be made to dispense two articles by a single coin, in which event only two segments instead of iive are employed. After operating a dispensing unit twice or after two operations of different units the coin of required denomination may be discharged.

In accordance with the patent statutes, I have described the principles f 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 shown is 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.

Iclaim:

1. In a dispensing machine, a plurality of groups of vertically disposed manually movable actuators, a movable locking plate having a catch normally preventing members of said groups of actuators from functioning, a latch adapted to be actuated by the movement of said locking plate, a lock pawl normally preventing the actuation of said locking plate and movable through the operation of the dispensing machine to release said plate, groups of spring retracted control elements corresponding with the groups of said actuators, a plurality of series of tumblers below and corresponding with the groups of control elements, and means connecting the groups of tumblers to permit only one control 5 element and a corresponding dispensing unit functioning at a single operation of all of the groups of control elements.

2. In a dispensing machine, a plurality of groups of manually movable actuators, a reciproclable locking element having catch means normally preventing members of said groups of actuators from functioning, latch means adapted to be actuated by the reciprocation of said locking element, lock pawl means normally preventing the actuating movement of said locking element and movable by the operation of the dispensing machine to release said locking element, companion groups of spring retracted control elements corresponding with said actuators, a chain of tumblers below and corresponding with each group of control elements, reciprocable means connecting the chains of tumblers to permit only one control element and a corresponding dispensing unit functioning at a single operation of all of the groups of control elements.

3. In a dispensing machine, a plurality of groups of manually movable actuators, a reciprocable locking element having catch means normally preventing members of said groups of actuators from functioning, latch means adapted to be actuated by the reciprocation of said locking element, lock pawl means normally preventing the actuation of said locking element and movable by the operation of the dispensing machine to release said locking element, a yoke frame between the arms of which said locking element is retained and through which said actuators are reciprocable in cooperation with said locking element, a chain of tumblers movably disposed in each of the arms of said yoke frame, companion groups of spring retracted control elements corresponding with each chain of tumblers in each arm of said yoke frame, and walking beam means reciprocably mounted on said 45 yoke frame and connecting the chains of tumblers to permit only one control element and a corresponding dispensing unit in both of said groupsfunctioning at a single operation of one of the control elements of both of said groups.

4. In a structure as defined in claim 1, the connecting means between the groups of tumblers comprising a walking beam having its ends abutting the ends of the series of tumblers of said groups to transmit operating motion from one 55 group of tumblers to another.

CHARLES F. PELASE.

REFERENCES CITED The following references are of record in the 60 le of this patent:

UNITED STATES PATENTS Number Name Date 2,133,453 Hoban Oct. 18, 1938 6,5 2,243,929 Watling June 3, 1941

Images