US3501723A

US3501723A - Coil and stationary magnet mounting for an electromagnetically operated device

Info

Publication number: US3501723A
Application number: US759381A
Authority: US
Inventors: Kenneth J Marien
Original assignee: Square D Co
Current assignee: Schneider Electric USA Inc
Priority date: 1968-09-12
Filing date: 1968-09-12
Publication date: 1970-03-17
Anticipated expiration: 1987-03-17
Also published as: GB1231923A

Description

, March 17, 1970 K. J. MARIEN r COIL AND STATIONARY MAGNET MOUNTING FOR AN ELECTROMAGNETICALLY OPERATED DEVICE Filed Sept. 12, 1968 uvvs/vron. KENNETH J. MARIEN United States Patent 3,501,723 COIL AND STATIONARY MAGNET MOUNTING FOR AN ELECTROMAGNETICALLY OPERATED DEVICE Kenneth J. Marien, Wauwatosa, Wis., assignor to Square D Company, Park Ridge, III., a corporation of Michigan Filed Sept. 12, 1968, Ser. No. 759,381 Int. Cl. H01h 9/02, 13/04 US. 'Cl. 335-202 Claims ABSTRACT OF THE DISCLOSURE An electromagnet support and mounting structure wherein a single mounting screw maintains a stationary magnet part in position on a mounting base and moves a lever to resiliently maintain the magnet coil in position on the stationary magnet part when the mounting screw is tightened in a threaded opening in the base.

This invention relates to electromagnetically operated devices and is more particularly concerned with an improved mounting for a stationary magnet part, a magnet coil and an armature of an electromagnet in an electromagnetically operated device.

Electromagnetically operated devices, such as switches and the like, of the gravity drop-out type, conventionally include a base which is secured on a mounting panel and which provides a support for the switching contacts and an electromagnet which operates the switch contacts. As a large number of switching devices may be mounted on a single panel, space requirements dictate that the size of the individual devices be as small as practicable without sacrificing their switching reliability and operational life. To accommodate the size requirements of the devices, the magnet structures tend to generate excessive heat when the devices are energized for long periods of time. In some devices, the heat generated by the magnets is dissipated by mounting the magnet structures on bases which are made of die cast metal. Another requirement which the devices are required to satisfy is that the magnet coil must be readily removable for service or replacement purposes. In many prior art devices elaborate structures are used to satisfy this requirement. In the device according to the present invention, the manipulation of a single screw will permit replacement of the entire magnet structure or the magnet coil, as desired. Additionally, one of the problems encountered in electromagnetically operated devices, is the shock accompanying the energization of the magnet is transmitted to the contacts of the device and causes the contacts to bounce and thus reduce the electrical life of the device when the device is operating to switch electrical loads. In the device according to the present invention, the shock accompanying the engagement of the movable magnet with the stationary magnet part upon energization of the magnet coil is absorbed by a novel structure which does not interfere with the removal or installation of the magnet structure or the heat dissipating properties of the device. Another feature included in the device according to the present invention is the use of an encapsulated coil. While encapsulated coils are well known, and are frequently used in devices of the type to which this invention relates, the novel arrangement for mounting the coil as used in the device according to the present invention, resiliently positions the coil to compensate for dimensional variations in the coils without sacrificing the ease with which the coil may be removed and replaced from the structure.

It is an object of the present invention to provide an electromagnetically operated device, such as a relay, with a novel structure which will permit the electromagnet in- 3,501,723 Patented Mar. 17, 1970 cluding the magnet coil to be readily removed and replaced and which will minimize the transmission of the shock accompanying the operation of the electromagnet to the switching contacts of the device.

Another object is to provide an electromagnetically operated switching device, such as a relay, with a die cast base which will dissipate the heat generated within the electromagnet, will position a shock absorbing structure to minimize transmission of shock forces to the switching contacts of the device when the electromagnet is energized, and which will position the electromagnet so the coil and other components of the electromagnet may be readily removed and installed upon manipulaion of a single screw which maintains the stationary magnet part on the base and operates a lever to position the magnet coil on the stationary magnet part when the screw is threaded into the base.

An additional object is to provide a novel connection between the armature and the yoke which carries the movable contacts of an electromagnetically operated switching device which will permit the electromagnet of the device to be readily removed and installed on a base of the device.

Further objects and features of the invention will be readily apparent to those skilled in the art from the specification and appended drawing illustrating a preferred embodiment in which:

FIG. 1 is a front view in elevation of an electromagnet switch including an electromagnet assembly formed ac cording to the present invention.

FIG. 2 is a cross sectional view taken along line 22 in FIG. 1.

FIG. 3 is an exploded view in perspective of the components as incorporated in the switch shown in FIG. 1.

FIG. 4 is a plan view of a screw as used in the switch assembly in FIG. 1.

The electromagnetic device or switch 10 shown in the drawings includes a base 12, preferably formed as a unitary part of die cast metal material to have a set of openings 14 for mounting the device on a vertical panel, not shown, with an electromagnet assembly 20 positioned at the lower vertical portion of the base 12. The opening 14 at the top of the base 12 is an inverted key hole-shaped opening and the pair of openings 14 at the bottom of the base are slots having exposed ends at the bottom edge of the base 12.

Positioned at the top portion of the base 12 by suitable screws 16 is an insulating support 18 carrying spaced pairs of stationary contacts each designated by a numeral 22. The respective pairs of stationary contacts 22 are located to be bridged by movable contacts 24 which are resiliently supported by springs 26 on a movable contact carrier 28 which is movable on the base 12. The structure of the support 18, the stationary contacts 22, and the movable contacts 24, is more fully disclosed and described in an application for United States Patent, Ser. No. 759,382, which is concurrently filed herewith and has been assigned by the inventors Allin Schubring and Kenneth L. Paape to the assignee of the present invention.

The base 12 is symmetrical about a vertical center line 30 and includes at its upper portion a suitable ledge 32 and slots to receive nuts 34 which receive the screws 16 to position and secure the insulated support 18 to the base 12. Extending inwardly from a front wall 36 of the base is a rectangularly shaped recess 38 having a rear wall 40. Located substantially at each of the four corners of the recess 38 are abutments 42, only one of which is shown in FIG. 3, each having a top surface extending in a plane spaced parallel and forwardly of the rear wall 40. Extending forwardly of the front wall 36 on opposite sides of the recess 38 are a pair of side walls 44 each having an inner wall 46 forming a continuation of the sides of the recess 38 and outer walls 48 extending perpendicular to surface portions 50 as are provided by the portions of the front Wall 36. The side walls 44 each have a front edge 52 extending in a plane that is spaced forwardly of the rear wall 40.

Extending across a top portion of the recess 38 between the pair of sidewalls 44 is a top wall or support ledge 54 having a front mounting surface 56 coplanar with the front edges 52 and a rear surface 8 which, as shown in FIG. 2, faces and is spaced forwardly of the rear wall 40. A threaded opening 60 located on the center line 30 extends through the top wall 54 between the mounting surface 56 and the rear surface '58 along an axis perpendicular to the rear wall 40. Extending for- Wardly of the mounting surface 56 is a stop wall 62 which has a stop surface 64 formed along an upper marginal edge of the mounting surface and an upwardly facing surface 66 spaced from the insulating support 18. The front surface of the wall 62 has a bore 68 located on the center line 30 extending inwardly in the wall 62 along an axis perpendicular to the rear wall 40. Additionally, portions of the top wall 54 have a pair of ledges 63 formed therein which extend on opposite sides of a boss 65 wherein the threaded opening 60 extends and which extend through suitable notches 67 in the sidewalls 44. The stop surface 64 is provided with a rectangularly shaped recess 70 which receives a shock pad 72 and a shock plate 74. The shock pad 72 and the shock plate 74 are laminated on each other to have the shock pad positioned between the shock plate 74 and the stop surface 64 when the shock pad 72 and the shock plate 74 are positioned in the recess 70. The recess 70'. has a depth less than the combined thickness of the shock pad 72 and" the shock plate 74, so surface portions of the shock plate project from the remaining portions of the stop surface 64 defining the recess 70. The shock plate includes an angled portion 76 extending substantially at right angles to the portion of the shock plate 74 which is positioned in the recess 70. The angled portion 76 has an opening 78 therein which receives a shank of a rivet 80 that is driven into the bore 68 so the head portion 82 is spaced from the angled portion 76 whereby the shock plate will have a limited unrestricted movement in the recess 70.

Loosely secured in the recess 38 is an L-shaped lever 84. The lever 84 is loosely maintained in the recess 38 by a pin 8-6 that extends from the rear wall 40- and extends to be loosely received in an opening in the lever 84 so that a central portion 90* of the lever 84 may rotate and act as a pivot about the rear wall 40. Extending upwardly from the central portion 90, is an arm portion 92 which extends upwardly into the space between the rear wall '40 and the rear surface 58. The arm 92 has a portion aligned with the threaded opening 60 in the top wall 54.

Extending forwardly from the central portion 90 at an angle less than perpendicular to the arm 92, the lever 84 is provided with an arm 94 which is bifurcated to provide a pair of spaced fingers 96. The lever 84 is formed of resilient material so the fingers 96 are capable of bending and will act as spring members.

The electromagnet assembly 20 includes a stationary magnet part '98, a movable magnet part or armature 100, and a magnet coil 102. The stationary magnet part 98 includes a stack of E-shaped magnet iron parts 104 which are laminated upon each other and tightly held assembled between a pair of non-magnet iron E-shaped side plates by rivets 108. The magnet part has a pair of arms 110 extending from opposite ends of a body portion 112 with a central leg 114 extending from a central portion of the body portion 112. The arms 110 are spaced on opposite sides of the central leg 114 and provide flat pole faces 116 wherein shading coils 118 are located. Extending in the body portion 112 along an axis perpendicularly to the rear wall 40 passing through the center line 30 and the threaded opening '60 is a bore or opening 120 which has a diameter greater than the diameter of the opening 60.

The armature 100 includes a stack of T-shaped magnet iron parts 122 which are tightly held assembled by rivets 124 to have a central leg 126 and flat pole faces 12-8 on opposite ends of body portion 130.

The body portion 130 has a tapered bore 132 extending therethrough that is perpendicular to the rear wall 40 along an axis passing through the center line 30.

The coil 102 is formed with suitable coil windings, not shown, which are encapsulated in a shell formed of epoxy or other suitable material toprovide a generally rectangular body having a pair of spaced ends which respectively provide an upper end 134, a lower end 136, a rear wall 138, sidewalls and a front wall 142 which has a raised portion providing an anchorage for a pair of wire connecting terminals 144 that are electrically connected to the windings of the coil 102. Additionally, the coil 102 has a rectangular opening or bore 147 extending between the upper and

lower ends

134 and 136, which receives the legs .114 and 126 with clearance. Further, the width between the sidewalls 140 is less than the distance between the sidewalls 44.

The movable contact carrier 28 is formed of a suitable impact resistant molded material to have a pair of spaced side legs 146, a lower member 148 bridging the bottom end portions of the side legs 146 and a movable contact carrier 150 bridging the top portions of the legs 146 to provide a substantially rectangularly shaped opening 152 between the side legs 146, the lower member 148 and the contact carrier 1 50'. The side legs 146 are spaced so the portions thereof forming the opening are adjacent and guided by the outer walls 48 while front surface portions 154 are substantially coplanar with the front edges 52 as the rear surface portions 156 thereof slide on the surface portions 50 of the base 12. The contact carrier 150, which positions the movable contacts as described in the Schubring et al. application supra, has a lower surface portion 158 resting upon the upwardly facing surface 66 when the magnet assembly 20 is de-energized. Secured in the lower member 148, as by being embedded therein when the contact carrier 28 is molded, is a pin 160' which is located on the center line 30 and projects vertical to a plane passing through the front edges 52 above the front surface of the lower member 148. The pin 160 is loosely received in the bore .132 to provide a connection between the armature 100 and the contact carrier 28 which will permit the armature 100 to have a limited universal type movement relative to the contact carrier 28. Additionally extending forwardly of the side legs 146 are projections 161 which may be used to actuate auxiliary switch units, not shown, for the purposes and in the manner as will be readily apparent to those skilled in the art to which the present invention pertains.

Also included in the structure of the switch 10 is a guide plate 162, a fastening screw 164 and a spring 166. The guide plate 162, in the embodiment shown, is formed as a die cast member although other methods of manufacture and materials may be used in its formation, is generally shaped to conform to the configuration of the stationary magnet part 98 and may include, on a face which engages the magnet part, suitable depressions, not shown, to receive the heads of the rivets 108. The portion of the guide plate 162 corresponding to the body portion 112 is provided with a threaded opening which is aligned with the threaded opening 60 when the guide plate is positioned on the mounting surface 56 by suitable projections, not shown, which are received in the ledges 63 and embrace the boss 65. Additionally, the guide plate is provided with a notch 172 which embraces portions of the stop wall 62 and notches 174 which provide clearance for the movement of projections 161. The screw 164 has a head portion 176 on one end and a tip portion 178 on its opposite end. Extending from the head portion 176 is a shank 180 having a diameter to be Ioosely received in the opening 120- and a reduced diameter shank portion 182 which is loosely screwed in the threaded opening 170 in the guide plate 162 after a threaded portion 184 located between the shank 182 and the tip 178 is threaded through the opening 170. The threaded portion 184, which has an outer diameter greater than the tip portion 178 and the shank portion 182, when threaded into the opening 60 positions the tip portion 178 in a position to engage the arm 92 of the L- shaped lever member 84. The screw 164, when installed, is maintained against loosening rotation by the spring 166 which is positioned under compression between the head 176 and the front surface of the body portion 112.

The switch is assembled by initially installing the laminated shock plate 74 and shock pad 72 on the top wall 62 by inserting the rivet 80 into the bore 68 and then installing the insulating support 18, with the stationary contacts 22 assembled thereon, and the movable contact carrier 28, with the movable contacts 24 thereon, onto the base 12. The insulating support 18 is maintained in position on the base 12 by the ledge 32 when the screws 16 are threaded into the nuts 34. The movable contact carrier 28 is positioned on the base 12 by projections 184 which extend from the rear face of the carrier 28 into forwardly facing grooves 186 in the base 12 so the side legs 146 are guided by the sidewalls 44 and the movable contact carrying portion 150 of the carrier 28 is positioned between the upwardly facing surface 66 and the insulating support 18 while the lower member 148 causes the pin 160 to extend forwardly of the base 12.

The components of the electromagnet assembly are then assembled as a unit by assembling the spring 166 on the shank 180 adjacent the head 176 of the screw 164 and passin the tip 178, the threaded portion 184 and the shank through the opening 120 so the shank 180 is loosely received in the opening 120 while the spring 166 is positioned between the head 176 and the front surface of the body portion 112. The guide plate 162 is then positioned onthe rear surface of the stationary magnet part 98 when the screw 164 is completely threaded through the opening 170 in the guide plate 162 so that the reduced diameter shank 182 is loosely received in the opening 170 to prevent disassembly of the guide plate 162 and the screw 164 from the stationary magnet part 98. The coil 102 is then positioned on the assembled guide plate 162 and the stationary magnet part 98 by inserting the central leg 114 into the opening 147 of the coil so the body portion 112 is adjacent the upper end 134 of the coil and the arms 110 are external of the sidewalls 140 to position the pole faces 116 at the lower end 136. The armature 100 is then positioned relative to the coil 102 and magnet part 98 by inserting the central leg 126 in the opening 147 so the body portion 130 is adjacent the lower end 136 of the coil 102 and the pole faces 128 are aligned with the pole faces 116.

The assembled electromagnet including the spring 166, the screw 164, the stationary magnet part 98, the guide plate 162, the coil 102 and the armature 100 are then positioned on the base 12 whereon the insulating support 18 and the movable contact carrier 28 have been previously assembled by placing the electromagnet assembly in a position wherein the body portion 112 is. aligned to be adjacent the shock plate 74 the fingers 96 are aligned to be adjacent the lower end 136 of the coil 102, the bore 132 is aligned with the pin 160, the guide plate 162 is positioned to engage the front edges 52 and the tip portion 178 is received in the threaded opening 60. The electromagnet assembly 20 when moved to its proper position on the base 12 will have portions of the coil 102 positioned in the recess 38 with portions of the rear wall 138 resting on the abutments 42, the armature 100 resting on the lower member 148, the body portion 112 resting on the mounting surface 56 and engaging the shock plate 74 while the rear surface of the guide plate 162 is positioned adjacent the front surfaces 154 to confine the movable contact carrier 28 on the base 12. The

assembly of the electromagnet assembly 20 on the base 12 is completed when the screw 164 is tightened in the threaded opening 60. As the screw 164 is tightened, the spring 166 will be compressed against the body portion 112 to resiliently maintain the stationary magnet part 98 on the mounting surface 56 while the tip portion 178 of the screw 164 engages the arm 92 and rotates the lever 84 about its central portion so the fingers 96, which straddle the bore 147, resiliently maintain the coil 102 in position on the stationary magnet part 98 which is also urged by the pressure exerted by the fingers 96 upwardly into a tight engagement with the shock plate 74.

The electromagnet assembly may be readily removed from the base 12 by unthreading the fastening screw 164 from the threaded opening 60 so that the electromagnet assembly 20, including the guide plate 162, the screw 164, the stationary magnet part 98, the armature 100 and the coil 102 may be removed as a unit. When the electromagnet assembly 20 is thus removed, the coil 102 or any of the magnet parts may be readily replaced or inspected and re-installed on the base in the manner previously described. The removal and insertion of the electromagnet assembly 20 is facilitated by the presence of the metal shock plate which permits the metal body portion 112 to slide with minimum friction across the metal shock plate 74 and the loose connection between the bore 132 and the pin 160.

When the switch 10 is mounted on the vertical panel and the electromagnet assembly 20 is de-energized, the'movable contact carrying portion of the movable contact carrier 28 will rest upon the upwardly facing surface 66. When the coil 102 is energized, the armature 100 which is attracted by the stationary magnet part 98, moves the movable contact carrier 28 upwardly and causes the pole faces 128 to engage the pole faces 116 with a firm seating engagement. The firm engagement between the pole faces 128 and 116 is a result of the movable connection provided between the pin and the bore 132. The shock accompanying the engagement between the armature 100 and the stationary magnet part 98 is transmitted by the body portion 112 through the metal shock plate 74 to the shock pad 72. The metal shock plate 74 is loosely mounted by pin 80 in the bore 68 so as to have limited movement so that the shock accompanying the movement of the stationary magnet part 98 is transmitted to the shock pad 72. The shock pad 72 is formed of a polyurethane material which is compounded in a manner well known to those skilled in the art to possess shock absorbing power and vibration dampening characteristics. As is well known to a polymer chemist, polyurethane material is a polym-eric material resulting from the condensation polymerization of diisocyanatesand polyols, and thus is particularly suited to absorb the shock accompanying the energization of the electromagnet so as to minimize the phenomena known as contact bounce of the switch. As clear- 1y shown, a considerable portion of the metal area of the stationary magnet part 98 is in contact with the shock plate 74 and portions of the base 12. This large area of metal-to-metal contact between the magnet part 98 and the base 12 will cause the heat generated within the stationary magnet part 98 when the coil 102 is energized, to be rapidly dissipated by the base 12.

While certain preferred embodiments of the invention have been specifically disclosed, it is understood that the invention is not limited thereto, as many variations will be readily apparent to those skilled in the art and the invention is to be given its broadest possible interpretation within the terms of the following claims.

What is claimed is:

1. In an electromagnetically operated device, the combination comprising: a base having a rear wall, a support ledge providing a mounting surface spaced forwardly of the rear wall, a threaded opening in the support ledge extending perpendicular to the rear wall and a stop wall extending forwardly and perpendicular to the mounting surface along an ,upper marginal edge f the support ledge, an electromagnet including a stationary magnet part and a mag netcoil, said magnet part having a body portion jtixtaposed to the stop walland the mounting surface and an opening therein aligned with the opening in the support ledge, 'said magnet coil having a pair of spaced ends .ex-

tending perpendicular to the rear wall with a first one of said pair of ends juxtaposed to, the body portion and a secondone of said pair of ends disposed remotely from I the stop wall and the body portion .ofthe stationary magnet part, and a means for securing the bodyportion on the mounting surface and tightly pressing the juxtaposed portions of the coil, the body portion, and the stop 1 wall into engagement with each other, said means comprising: a lever having a central portion pivoted on the rear, wall, a first arm portion engaging the second end of.

the coil and a second arm portionextending into a space between the rear, wall and support ledge in alignment with the openings in the ,body portion and thesupport ledge, andathreaded member having a head portion disposed externally of the body portion, a shank portion extending in the opening in the body portion, a threaded portion received in the ,threaded opening andatip portionengag; ing the second arm portion of the lever for securing the,

body portion on the mounting, surface and rotating the lever about the pivoted central portion and moving the firstarm :portion against the second face of the coil to press the, juxtaposed portions of the coil, the stationary magnet partand the stop wall in tight engagement with each other whenfthe thread portion is threaded into the threaded p n 3 t 2, Inan elecromagnetically operated device, the com bination comprising: a base having a rear wall, a pair of forwardlyprojecting parallel spaced sidewalls witheach ginal edgeofithe rnounting surface, an electromagnet inv eluding a stationary magnet part, andia magnet coil, said, stationary magnet part having 'a body,,portionjuxtaposed to, the stop walland the mountingsurface, anopeningin the body portion aligned with theopening in the support ledge and,arm portions positioned on, the front ends of the sidewalls, said rnagnetcoilhaving a pair of spaced ends extending perpendicular totherear wall with a first one of ,said, pair of'ends juxtaposed to, the body portion and a second one of said pair of ends ,disposed remotely from the stop wallof thebase and the body portion of the stationary magnet part, and a means for securing the body portionon. the. mounting surface and tightly pressing the juxtaposed portions of the coil,, thebody portion and the stop wall into engagement with each other, said means comprising: a lever having av central portion pivoted on the rear wall, a first armportion engaging the second end of the coil and a second arm portion extending into the space between theHre-ar wall and the rear surface in alignment withthe aligned; openings in the body portion and the top,wall, and a threaded member having a head,

portion disposedexternally of the body portion, ashank portion extending intheopening in the body ,porti on, a

threaded portion received in the threaded opening and, a

tip portion engaging the second arm portion of the lever for securing the body portion on the front mounting surface and rotating the lever about the P VQ fll nfi PO tion and movingthe first arm portion against the second. end of the coil to press the juxtaposed portions of the coil, the stationary magnet part and the stop wall in tight engagement with eachother when the thread portion is threaded into the threaded; opening:

3. The combination as recited in claim" 1- wherein a;-

spring positioned between the headportion and the'body portion of the magnet part resiliently maintains the body portion on the mounting surface. r

4, The combination as recited in claim 1-wherein =ametalplate and a polymeric member are positioned between the body portion and the stop wallto absorb shock accompanying the energization ,of' the eleotromagnet.

5. The combination as recited in claim 1 wherein the magnet coil includes a bore extending between the pairof ends and the first arm portion of, the lever isbifurcated to provide a Pair of spaced fingers which are positionedon opposite sides of the bore exposed by the second end of the coil.

.6. ,The combination as recited in claim 2 wherein the electromagnet includes an armature that is movable 'into an engaging position with portions of the stationary magnet part upon,energization of the magnet coil and the velectromagnetically operated device includes a movable contact carrier havinga pair of spaced arms movable;

along the spaced parallelside walls. and an end wall extending between the pairof spaced aims and a connection between the armature and the Contact carrier includes a single pin that extends through a centrally located opening in the armature. t

1. The combination as, recited in claim 2 wherein the electromagnet includes-an armature that is movable into an engaging position-with portions of the stationary magnet partupon energizationof the magnet coil and the electromagneti cally operated device includes .a movable,

contact carrierhaving, a pair of ,spaced arms movable along the spaced parallel side walls and ,a, Pair of spaced end walls extending between the pairof spaced arms, a connection between the armature and the contact carrier includes asingle pin carried by one of the pair Of' spaced end walls that extends through ,a centrally, located opening in the armature andthe-othe r ofgsaid pairof end walls 1s arranged to engage the stop wall when the electromagnet is de-energized.

8. The combination: as ,recited inclaim; 4, wherein the polymeric member is positioned between the metal plate and the stop wall.;- s, 1,1,1 1, 1 ,5

9. The combination as recited in.,claim 2 wherein the stationary magnet, part is E-shaped and-themagnet coil includes abore extending between the; spaced. ends which,

is receivedv by a central-leg ofthestationary magnet part while a pair of outer legs of the. stationary magnet rest 1 upon the front edges of the spaced sidewalls of ,thebase. 10. The combination as recited in claim 8 wherem the polymeric membersis formed as a sheet-like part of polyurethane material. References Cited I UNITED STATES PATENTS 4/1965' McGary' 335-402v 3,179,771 3,339,161, 8/1967 Conner 335-493. 3,406,361 10/1968 Mauviel 33s 2o2 G. HARRIS, Primary Examiner H. BROOME, Assistant Examiner Us. 01. XRQ 335-132