US 3626624 A
Description (OCR text may contain errors)
Filed March 10, 1969 F. C. GREEN IELECTRO-MECHANICAL FREE PISTOL 4 Sheets-Sheet 1 In [0 a g m Pow N no lmo m J m (D E FRANKLIN c. GREEN w\ INVENTOR N o q (\l E ATTORNEY Dec. 14, 1971 F. C. GREEN ELECTED-MECHANICAL FREE PISTOL 4 Sheets-Sheet 3 Filed March 10, 1969 INVENTOR ATTORNEY Om m: ON m N:
",2 FRANKLIN c. GREEN Dec. 14, 1971 F. c. GREEN 3,626,624
ELECTRO-MECHANICAL FREE PISTOL Filed March 10, 1969 4 Sheets-Sheet 4.
FRANKLIN C. GREEN INVENTOR ATTORNEY United States Patent Cffice 3,626,624 Patented Dec. 14, 1971 3,626,624 ELECTRO-MECHANICAL FREE PISTOL Franklin C. Green, 6304 Locker Lane, San Antonio, Tex. 78238 Filed Mar. 10, 1969, Ser. No. 805,470 Int. Cl. F41c 11/00, 19/00, 19/12 US. Cl. 4284 11 Claims ABSTRACT OF THE DISCLOSURE The present invention relates to an in line electrically actuated, mechanical firing mechanism for target and sporting firearms and more particularly to such a firing mechanism with minimal operating variation.
An object of the present invention is the provision of a compact firing mechanism which affords maximum freedom of choice in overall design for a firearm.
Another object is to provide a free pistol wherein the marksman can utilize any grip, grip angle, and any trigger switch wherein said grip and trigger switch are positioned in relationship to each other as desired by the marksman.
' Still another object is to provide such a free pistol wherein the design alfords the marksman his choice of balance.
A further object is to provide such a free pistol wherein the trigger switch is completely adjustable for weight of pull from a few grams to over four ounces by a single adjusting screw.
Another object is to provide a firing mechanism wherein the lock time or interval between the pull of the trigger and the striking of the cartridge by the firing pin is not only extremely fast but also extremely consistent.
Still another object is to provide maximum dependability by protecting key parts from contamination.
A final object is to provide a firing mechanism wherein less maintenance is required than with conventional firearms.
Other objects and features of the invention will become apparent to those skilled in the art as the disclosure is made in the following detailed description of a preferred embodiment of the invention as disclosed in the accompanying drawing in which:
FIG. 1 is a side elevational view of the preferred embodiment of electro-mechanical free pistol of the subject invention.
FIG. 2 is a muzzle end view of FIG. 1.
FIG. 3 is a fragmentary, vertical sectional view of the medial portion of the barreled action of FIG. 1 taken along the longitudinal axis thereof.
FIG. 4 is an enlarged, vertical sectional view transverse to the longitudinal axis taken through the foremost portion of the clamping block with the bolt retracted.
FIG. 5 is a fragmentary, enlarged, top plan view, partly broken away and partly in section, of the complete bolt assembly utilized in the embodiment of FIG. 1.
FIG. 6 is an enlarged, vertical sectional view taken along the longitudinal axis showing the bolt in the cooked, handle down condition.
FIG. 7 is an enlarged, vertical sectional view taken along the longitudinal axis showing the bolt in the fired, handle down condition.
FIG. 8 is a greatly enlarged view showing the relationship of the forward hearings to the retaining ring and locking sleeve wherein the solid line portions represent the respective parts in the cocked condition and the reference line portions represent the respective parts in the fired condition.
FIG. 9 is a greatlyenlarged view showing the, relationship of the aft bearings to the locking sleeve wherein the solid line portions represent the respective parts in the cocked condition and the reference line portions represent the respective parts in the fired condition.
FIG. 10 is a schematic diagram showing a circuit utilized in the subject invention; and
FIG. 11 is a schematic diagram of another circuit utilized in the practice of the invention. j
Referring now to the drawings, wherein like reference characters designate like or corresponding parts throughout the several views, there is shown in FIGS. 1 and2 of the drawings a preferred embodiment of the electro-mechanical free pistol of the subject invention. More particularly, barreled action 21 consists of barrel 22, receiver 23 and bolt 24. Barrel 22 includes chamber 25 to accommodate a cartridge of desired caliber; front sight 26 of conventional design is secured to said barrel in proximity to the muzzle end thereof whereas rear sight 16 is conventionally secured to receiver 23. r
Trigger housing 28 and pistol grip 29 are adjustabl positioned on and secured to barreled action 21. As "best seen in FIGS. 2-4 of the drawings, the rearmost lower surface of barrel 22 andthe lower surface of receiver 23 are provided with longitudinally and horizontally extending, aligned dovetails 30-31.
Grip 29 of conventional design or custom fitted to the marksmans hand includes first and second recesses 32-33, respectively. Recess 32 surfaces in the upper front and top of said grip and accommodates a metallic clamping block 34, preferably of aluminum or steel. Longitudinally and horizontally extending dovetail groove 35 in the upper surface of block 34 receives dovetail 31 heretofore mentioned; longitudinally and vertically extending slot 36 in said block terminates upwardly in groove 35 and downwardly in longitudinally extending bore 37 or the like. Longitudinally spaced and transversely extending machine I screws 38 pass through bores 39 in the upper portion of block 34 and insert into female threads 40 in the opposite side of the said block. Preferably counterbores 41 accommodate the heads of the respective screws; communicating bores 42 surface in the upper, left-hand side of grip 29 and provide access to the said screws.
Clamping block 34 is positioned in recess 32 in such a manner to provide clearance 43 for aft travel of trigger housing 28; a suitable bonding agent 44 such as epoxy resin or the like is applied to at least that side of block 34 which includes female threads 40 and the bottom of the said block. Grip 29 is desirably positioned on barreled action 21 and is secured thereto by tightening screws 38 thereby drawing together the sides of clamping block 34 against dovetail 31.
As viewed in FIGS. 1 and 3 of the drawings, recess 33 surfaces on one side of grip 29, said recess generally accommodates the circuitry and components of FIGS. 10- 11 of the drawings. Cover plate 45, secured to grip 29 as by screw 46 or the like, provides access to recess 33.
Trigger housing 28 is preferably composed of aluminum or the like and terminates forwardly in portion 47 which is substantially greater in width than the remainder of the housing; dovetail groove 48 (see FIG. 2) in the upper surface thereof accommodates dovetail 30 hereto fore mentioned. Vertically and longitudinally extending slot 49 in portion 47 terminates rearwardly in vertical bore 50; screw 51 passes through transversely extending bore 52 and threadingly inserts into the opposite side of portion 47 drawing the opposing sides together to secure the trigger housing to barreled action 21. J
The upper surface of trigger housing 28 rearwardly of aortion 47 is flat, extending along the plane of groove 48. It is understood that trigger housing 28 is desirably posi- :ioned on dovetail 30; the rear portion of housing 28 may :xtend into clearance 43 to any desired depth or until stopped by butting block 34 after which screw 51 is .ightened.
Referring to FIG. 3 of the drawings, the rear vertical Jortion 52 of housing 28 includes recess 53 in which is :onventionally secured a single pole, single throw switch 54 or any miniature switch. A vertically extending bore 55 n the horizontally extending top portion of said housing tdjacent rear portion 52 accommodates the upper end of irigger 56 which is secured therein by means of trans- ICI'SCIY extending pin 57. Fore and aft stops 59-60 to limit vrigger travel, such as are well known in the art, are proided in the horizontally extending lower portion 61 and he lower, rear portion 52, respectively. When trigger 56 s pulled rearwardly, the rear surface thereof bears against )robe 62 of switch 54 causing the contacts (not shown) .0 close, activating the circuits of FIGS. 10 and 11 of the lrawings. The foremost vertical portion 63 of trigger rousing 28 includes bore 64 in proximity to the lower :nd thereof to permit access to and easy adjustment of 'ore stop 59.
As best seen in FIGS. 1 and 4 of the drawings, loading Jort 65 is provided in the upper, left-hand side of receiver 53 rearwardly of chamber 25. Bolt handle 66, connecting It one end to bolt 24, rides in an L-shaped slot in receiver 23 rearwardly of loading port 65, said slot consists of ongitudinally and medially extending portion 67 termiiating forwardly in laterally extending portion 68. When )0 24 is in the closed and locked condition, bolt handle i6 is approximately seventy-five degrees below the vertical is shown in FIG. 2 of the drawings; the said bolt handle nay be rotated to the vertical and thence drawn rearvardly in longitudinally extending portion 67.
Still referring to FIG. 4 of the drawings, cartridge head 'ecess 69 is provided in the face of bolt 24; laterally spaced iring pins 70 pass through longitudinally extending bores '1 (see FIG. 6) which surface in the said recess. Exractor 72 of conventional design extends downwardly nto said recess to engage the rim of a cartridge.
The foremost, lower surface of bolt 24 includes fiat 73 :see FIGS. 6 and 7) which extends approximately onehird the length of the bolt and terminates rearwardly in houlder 74, said fiat rides on ramp 75 composed of epoxy teel or the like. Integrally formed and downwardly de- Jending lug 76 on ramp 75 inserts into bore 77 in the loor of receiver 23. The forward end of ramp 75 butts warrel 22 while the rear end is slightly spaced from houlder 74 heretofore mentioned; such construction preents rotation of forward section 78 of the said bolt.
Referring now to FIGS. 6 and 7 of the drawings, forvard section 78 of the bolt includes an axial, rearwardly tpening bore 79 which surfaces downwardly in fiat 73. Bores 71 heretofore mentioned communicate with bore '9. Striker head 80 rides in bore 79 with firing pins 70 ress fitted therein. Rearwardly, striker head 80 includes .n integrally formed collar 81 of reduced diameter into vhich the foremost end of striker shaft 82 threadingly nserts and is secured by means of cross pin 83; preferably haft 82 is of stainless steel. Main spring 84 carried on haft 82 bears against striker head 80 and retainer 85 hrough which the said shaft passes. Retainer 85, termilating rearwardly in shoulder 86 and reduced diametral )ortion 87, is maintained in position by one or more pins i8 (see FIG. 5) which pass laterally of portion 87, bear gainst shoulder '86 and are secured outwardly in bores :9.
Forward section 78 of the bolt terminates rearwardly n external axial cylindrical section 90. Aft section 91 of aid bolt terminates forwardly in internal axial cylindrical ection 92 which mates with section 90. Axial bore 93 n the fore part of section 91 is preferably of the same liameter as bore 79 heretofore mentioned.
Angularly extending, elongated slot 94 is provided in section with a coacting, oppositely extending slot 95 in section 92; slot 95 terminates rearwardly in communicating and laterally extending fiat 96. It is understood that an angularly and oppositely extending, elongated slot (not shown) one hundred eighty degrees displaced relative to slot 94 is provided in section 90; section 92 is provided with a coacting, angularly and oppositely extending, elongated slot one hundred eighty degrees displaced relative to slot 95, which slot terminates rearwardly in a laterally extending fiat.
Cylindrical carrier 97 of lesser diameter than bore 93 rides on shaft 82 and includes diagonally extending bore 98; cam pins 99 pass through slots 94, 9'5 and the coacting slots one hundred eighty degrees displaced relative thereto, insert into opposite ends of bore 98 and bear against shaft 82. Such construction permits aft section 91 to be rotated approximately seventy-five degrees relative to forward section 78.
The approximate medial portion of aft section 91 is of the same outside diameter as forward section 78 whereas axial bore 100 therein is of lesser diameter than bore 93. Aft section 91 terminates rearwardly in axial cylindrical section 101 the outer surface of which includes male threads 102.
Steel collar 103 of lesser diameter than bore 100 is fixedly secured as by silver soldering or the like on shaft 82 slightly rearwardly of said carrier as viewed in FIG. 7 of the drawings. Striker lug 104 of the same approximate diameter as collar 103 is threaded onto the rear end of shaft 82 and secured thereto by means of cross pin 105.
Bolt extension 106 is tubular, terminating forwardly in cylindrical section 107 of reduced exterior diameter which is press fitted into section 101. The inside diameter or bore of extension 106 is preferably the same as bore 100 in section 91. At least three equally spaced transversely aligned and radially extending bores 108 in extension 106 rearwardly of aft section 91 accommodate forward bearlngs 109. Retaining ring 110 is carried on extension 106, butts the rear end of aft section 91, and serves as bearing retention means during assembly and disassembly. As best seen in FIG. 8 of the drawings, ring 110 opens rearwardly and includes inclined surface 111.
Locking sleeve 112 is tubular with the inner, foremost end chamfered, indicated by reference numeral 113 (see FIG. 8); the said sleeve terminates rearwardly in external axial cylindrical section 114 which includes chamfer 115 (see FIG. 9). Sleeve 112 is positioned outwardly of bolt extension 106 and suspended by the forward and aft bearings. Diagonally extending bore 116 in the approximate medial portion of extension 106 accommodates cross pin 117 which terminates outwardly in longitudinally extendmg elongated slots 118 in sleeve 112, thereby preventing rotation of said sleeve.
At least three equally spaced, transversely aligned and radially extending bores 119 in proximity to the rear end of bolt extension 106 accommodate aft bearings 120; as best seen in FIG. 9, the said bores are inclined at an angle ranging from zero to ten degrees from the vertical in such a direction as to permit the bearings to move rearwardly as required to guarantee release of the striker assembly and/or change the effective angle of contact between chamfer 115 and bearings 120. Bores 119 may be positioned intermediate bores 108 heretofore mentioned.
Sear 121 rides in the bore of bolt extension 106 rearwardly of cross pin 117; more specifically, recesses 122 123 are provided in the fore and aft ends of the said sear with axial bore 124 communicating therewith. As viewed in FIG. 9 of the drawings, medial portion 125 of the sear -121 is of reduced diameter terminating rearwardly in chamfer 126; portion 127, slightly greater in diameter than portion 125, terminates rearwardly in chamfer 128. Disc 129 inserts into recess 122; one end of rod 130 is fixedly secured to the-said disc and passes rearwardly through bore 124.
Spring retainer 131 terminates forwardly in shoulder 132 which butts the rear end of bolt extension 106; reduced diametral portion 133 of said retainer inserts into the bore of said bolt extension. Recess 134 in the fore end of portion 133 accommodates one end of spring 135 carried on rod 130. The foremost end of spring 135 inserts into recess 123 in sear 121. Rod 130' passes through axial bore 136 in retainer 131 and threadingly inserts into an armature consisting of vertically and transversely extending disc 137 with integrally formed and rearwardly extending reduced diametral core portion 138.
Spring guide 139, carried on bolt extension 106 in a loose fit, butts the rear end of sleeve 112 and accommodates one end of spring 140 carried on the said bolt extension. The other end of spring 140 butts shoulder 132 on retainer 131; the said retainer terminates rearwardly in a reduced diametral portion 141.
Referring now to FIG. of the drawings, dust cover 142 is generally tubular with female threads 143 in the foremost end. Cover 142 is placed outwardly of the rearmost bolt portions and screwed onto male threads 102. Bolt handle 66 threadingly inserts into the medial portion of aft section 91 and desirably bears against the foremost end of the said dust cover to secure the same in position.
Rearwardly cover 142 includes flanged collar 144 and a reduced diametral exterior portion which is provided with male threads 145; the said cover terminates rearwardly in inwardly extending ring '146 which accommodates portion 141 of retainer 131.
Electromagnet support andcover 147 is cup-shaped and mcludes female threads 148 in the foremost end which mate with male threads 1*45 heretofore mentioned. Electromagnet 149 is adjustably positioned in support 147 by means of a plurality of circumferentially spaced and radially extending set screws 150; axially extending, forwardly opening insulating sleeve 151 in the said electromagnet accommodates core 138 of the armature. Leads 152-153 connect to magnet 149, pass through bore 154 in cover 147 and connect to outwardly extending connectors 1'55 fixedly secured on the said cover. Set screw 156 in the foremost portion of cover 147 is adjusted to bear against male threads 145 securing cover 147 to dust cover 142.
In the preferred embodiment of the invention, both forward section 78 and aft section 91 of the bolt are com.- posed of 4140 alloy steel which is thereafter heat treated to approximately 35 Rockwell C; lug 1'0'4, bolt extension 106, locking sleeve 1-12 and sear 121 are composed of 8620 alloy steel and heat treated to at least 60 Rockwell C; bolt handle 66 is of alloy steel hardened to approximately 50-55 Rockwell C; receiver 23 is of 4130 seamless tubing, in the annealed state; areas subject to wear on receiver 23 are flame hardened, as required.
There is shown in FIG. of the drawings a manual recharge circuit and in FIG. 11 an automatic recharge circuit utilized in the practice of the subject invention. As heretofore mentioned, switch 54 is a single pole, single throw switch or any miniature switch which is activated by trigger 56. Switch 54 is connected to the anode and gate, respectively, of a silicon controlled rectifier 157 such as GEX5 or the like. Solenoid 158 comprises the field coil of electromagnet 149 and armature disc 13-7 and core portion 138, respectively; the said *field coil is connected to the cathode of rectifier 157 and to ground. A five hundred microfarad capacitor 159 connects to the anode of rectifier 157 and ground, respectively; series connected power supply 160 of fifteen volts and normally open switch 161 parallel capacitor 159.
Switch 161 is momentarily closed to rapidly charge capacitor 159 to battery voltage. Upon closing the contacts on switch 54 in the manner heretofore described, rectifier 157 passes current from capacitor 159 through the said rectifier to the field coil of electromagnet 149 causing core 138 and attached sear 121 to retract and release the firing mechanism. Rectifier 157 is shut off by induced reverse E.M.F. from solenoid 158 before capacitor 159 is fully discharged, even though the contacts of switch 54 are held closed. Such electrical circuit must be manually recharged prior to each shot; this not only provides the desired degree of safety fora free pistol but also may be accomplished quickly when switch 161 is positioned in the bottom of grip 29.
In the embodiment of FIG. 11, switch 54 connects to the anode and gate, respectively, of silicon controlled rectifier 157 heretofore described. The field coil of solenoid 158 is connected to the cathode of rectifier 157 and to ground; capacitor 159 connects to the anode of the said rectifier and to ground. Power supply 160 connects to the anode of rectifier 157 and the collector of a PNP transistor 162 such as GE-21 or the like. Resistor 163 of K ohms connects to collector and base, respectively, of the said transistors. Series connected resistor 164 of 4.7K ohms and silicon diode 165 connect to the gate of rectifier 157 and baseof transistor 162, respectively.
Generally speaking, transistor 162 is non-conductan when the contacts of switch 54 are closed and conductant when the said contacts are open; rectifier 157 turns off by induced reverse EMF from solenoid 158. Transistor 162 starts conducting at a rate set by resistor 163 to charge capacitor 159 until the said capacitor is fully charged. When the contacts of switch 54 are closed by means of trigger 56, on connecting the gate to the anode of rectifier 157 power is supplied to the base of transistor 162 through resistor 164 and diode 165. At such time transistor 162 acts like an open switch, disconnecting power supply 160 from capacitor 159 and rectifier 157. Rectifier 157 turns on and discharges the current from capacitor 159 through the field coil of solenoid 158 whereby core 138 is pulled rearwardly, releasing the firing mechanism. Induced reverse voltage from solenoid 158 will turn off rectifier 157 before trigger 56 is released.
When trigger 56 is released and contacts of switch 54 open, such action removes power from transistor 162 and disconnects the gate from the anode of rectifier 157; rectifier 157 turns off, if not already off. Transistor 162 becomes conductant and applies power to capacitor 159 which starts recharging. Solenoid 158 is inactive and power is supplied to charge capacitor 159 only.
It is understood that electrical leads connecting to the circuits of FIGS. 10-11 pass from recess 33 through vertical bore 166 (see FIG. 3) and thence through bore 37 in block 34 to connect to switch 54. Communicating bores 167-168 in block 34 and grip 29, respectively, accommodate leads 169-170 secured rearwardly to connector 171 which mates with connector 155 (see FIG. 5).
As heretofore mentioned, forward section 78 of the bolt does not rotate while aft section 91 is rotated by means of bolt handle 66. Rotation of bolt handle 66 to the vertical causes carrier 97 to move rearwardly; pins 99 secured to the said carrier riding in slots 94, 95 provide indexing and atwo-toone mechanical advantage. Carrier 97 butts collar 103 secured on shaft 82 moving the same to an overcock position which occurs when handle 66 is vertical. At this point, pins 99 rest on flat 96 in aft portion 91 and the coacting fiat one hundred eighty degrees displaced relative thereto.
In the overcooked condition forward bearings 109 are positioned fully in their respective bores by sleeve 112 due to forward pressure of spring 140. Chamfer 113 contacts bearing 109 approximately twenty degrees from the vertical; as soon as sleeve 112 moves to this position, aft bearings are forced outwardly by chamfer 126 on sear 121 which is biased by spring 135. Sear travel limit is provided by adjustment of shaft threadingly inserting into the armature; forward movement of disc 137 of the said armature is stopped by reduced diametral portion 141 of retainer 131. Outward movement of aft bearings 120 is stopped by cylindrical section 114. At this point sear 121 is in the fully cocked condition; all other parts In this cocked condition chamfer 115 contacts aft bearngs 120 at an effective angle of approximately forty degrees relative to the-inclined bore 119. Chamfer 113 of leeve 112 contacts forward bearings 109 at an'eftective' tngle of approximately twenty-five degrees from the verical. I
As a safety feature, should the firing mechanism reease, ignition cannot occur until such time that bolt hanlle 66'has been rotated downwardly in portion 68 aproximately sixtydegreesyprior.to this point carrier 97 ind associated pins 99 have not indexed far enough foryard to prevent butting by collar 103.
Prior to firing, as shown in FIG; 6, sear 121 is heavily .:ngaged; The firing cycle begins with sear 121 electricaly moved rearwardly in the manner heretofore described 0 a point where aft bearings 120 begin to move inward y against chamfer 126; at such point aft bearings 120 can tssis't movement of sear 121 rearwardly. Additionally, any
nward movement of aft bearings 120 results in a pro-m iortionate forward movement of striker lug 104 and .triker shaft'82 connected thereto.
Upon aft movement of sear 121, the heavy loadimposed m all parts in the cooked condition is relieved and movengs 109 is exceptionally rapid. Ignition occurs .as firing ins' in the foremost end of shaft 82 contact a cartridge n chamber 25.
Upon firing, sleeve 106 has some rearward inertia which 5 stopped by pin 117 and spring 140. Sleeve 106 then 'ravels'in aforward directionuntil stopped by chamfer .13 in contact with forward bearings 109 as shown in IG. 8 of the drawings.
Spring 135 forces sear 121 forwardly and chamfer 126 hereby exerts an outward force on aft bearings rotricted by chamfer 115. All parts are now at rest preptratory to the next cocking cycle.
What is claimed is:
1. An electro-mechanically operated firearm comprisng a barrel, receiver, firing mechanism and stock, said iring mechanism comprising a forward section and an ift section, an extension secured to said aft section, a plu- 'ality of first bores in said extension in proximity to said 1ft section, each of said first bores accommodating a forvard bearing, a longitudinally extending striker shaft in aid firing mechanism, at least one firing pin secured to aid shaft, a main spring carried on said shaft, cocking neans for said shaft, said shaft terminating rearwardly n a striking lug, said forward hearings in contact with a elected portion of said striker lug, a plurality of second 'nent of aft bearings 120, sleeve 106 and forward bear bores in proximity to the other end of said extension, each of saidsecondbores accommodating an aft bearing, a
forwardly biased sleeve positioned outwardly of said extension and supported on said forward and aft bearings, 21. searinsaid extension, said aft bearings in contact with a selected portion of said sear, a solenoid consisting. of-a' field coil and a core, said field coil secured rearwardly to said firing mechanism, said sear connected to said core, selectively'activating means for'said field coil of said solenoid whereby said sear permits said aft bearings to move inwardly, sad forward bearings move outwardly and release said striker shaft.
2. The invention of claim 1 wherein said selectively activating meansconsists of a capacitor discharged through a silicon controlled rectifier.
3. The invention of claim 1 wherein said selectively ac- 'tivating means consists of a capacitor discharged through a silicon controlled rectifier and said capacitor is-automatically recharged by transistor switching. 1
-4. The inventionof claim 1 further including a trigger housing, and means adjustably positioning said trigger housing on at least said barrel. 1
- 5. Theinventionof claim 1 further including a trigger housing, and means adjustably positioning said. trigger 7 housing on at least said receiver.
, 6. Theinvention of claim 1 further including a trigger housing, means in at least; said barrel, and coacting means I in said trigger housing to secure said trigger housing on v at least said barrel.
7. The invention of claim 1 further-including a trigger 7 housing, means in at least said receiver, and coacting meansin said trigger housing to secure said trigger housing on at least said receiver. I I
8. The invention of claim 1 including means adjustably positioning said stock on at least said barrel.
9. The invention of claim 1 including means adjustably positioning said stock on at least said receiver.
1 I 10.. The, invention of, claim 1 furtherincluding a trigger housing, a trigger mountedin said'housing,an d means in said trigger housing to adjust trigger travel.
I 11. The invention of claim -1 further including a trigger housing, a trigger mounted insaid housing, a normal- 1y open switch mounted in said housing, said trigger adapted to bear against said switch to activate the same.
References Cited UNITED STATES PATENTS BENJAMIN A. BORCHELT, Primary Examiner C. T. JORDAN, Assistant Examiner US. Cl. X.R. 42-16 R; 89-187