US2578751A - Graphite gun - Google Patents

Description

0. D. SHONNARD GRAPHITE GUN Dec. 18, 1951 2 SHEETS-SHEET 1 Filed Sept. 9', 1947 INVENTOR.

' ORLANDO D. SHONNARD ATTORN Y.

2 Sl-IEETS-Sl-IEET 2 INVENTOR.

ATTORN Y.

Dec. 18, 1951 o. SHONNARD GRAPHITE GUN Filed Sept. 9, 1947 ORLANDO D.SHONNARD Patented Dec. 18, 1951 GRAPHITE GUN Orlando D. Shonnard, Upper Montclair, N. J.,

assignor to Joseph Dixon Crucible Company, Jersey City, N. J., a corporation of New Jersey Application September 9, 1947, Serial No. 772,943

3 Claims. 1

This invention relates to a gun for ejecting dry, powdered or granular materials, such as graphite, insecticides, or pigments.

The invention has for its salient object to provide a simple, practical and efficient device of the character specified that can be economically manufactured and comprises few parts.

Another object of the invention is to provide a gun of the character specified that is compact and in which protruding parts can be folded or nested to occupy a minimum amount of space when the gun is not in use.

Another object of the invention is to provide means, in a gun of the character described,.for closing the nozzle and thereby prevent accidental ejection of graphite or other powdered material and to prevent water, moisture or other foreign substance from contacting the contents of the gun when the gun is not in use.

Another object of the invention is to provide a gun of the character specified so constructed and arranged that the material ejected may be controllably directed.

Another object of the invention is to provide a gun of the character specified with simple, efficient and self-contained means to insure a clean and unobstructed nozzle bore and nozzle tube.

Another object of the invention is to provide a gun of the character specified so constructed and arranged that the powder or contents will be stored and sealed against escape except through the discharge nozzle when the gun is used.

Another object of the invention is to provide a gun of the character described so constructed and arranged as to provide wide operating flexibility and to enable the user to discharge a spot or small amount of material or a full blast.

Further objects of the invention will appear from the following specification taken in connection with the drawings which form a part of this application, and in which Fig. 1 is a side elevational view of a gun constructed in accordance with the invention, the handle being shown in dotted lines in operative position and in full lines in folded position;

Fig. 2 is a front elevation of the gun;

Fig. 3 is a rear elevation of the gun;

Fig. 4 is a longitudinal sectional view showing the parts in position before operation of the gun;

Fig. 5 is a longitudinal sectional elevation showing the parts after they have been moved to full operative position;

Fig. 6 is a transverse sectional elevation taken substantially on line 66 of Fig. 1, looking in the direction of the arrows;

Fig. 7 is a transverse sectional elevation taken substantially on line 'l-l of Fig. 1, looking in the direction of the arrows; and

Fig. 8 is a sectional elevation showing a, modified mounting for the wire closure and cleaning pm.

In the particular embodiment of the invention illustrated, the gun comprises a housing, such as the elongated barrel or tube I0, having its rear end closed by a plug H secured in position by screws l2 and having its front end closed by a cap [3 threaded thereon.

The cap I3 has a central bore or opening I4 surrounded by a cylindrical flange or sleeve I5 formed integral with the cap. The cap is recessed at the outer end of the sleeve [5, as shown at l6, and a T-shaped bushing I! formed of rubber or like material is mounted in the sleeve l5 and recess It. The bushing I l slidably receives a nozzle tube 20.

On the outer end of the nozzle tube 2!] is mounted a nozzle having a tapered outlet bore 25A and a central discharge hole 26.

The nozzle tube 20 extends into a chamber 21 and in this chamber is mounted a collar or sleeve 39 which is secured in the barrel by screws 3|. A packing A seals the front end of the seal 30. I

The sleeve 30 has a reduced grooved end '32 and a flexible, compressible, imperforate tube 33 is tightly secured, as shown at one end in the groove of the end 32. The tube 33 is preferably formed of rubber or like air tight material impervious to powder or graphite. A spring 35 is disposed in the tube 33 and seats at one end at 36 against the rear end of the sleeve 30.

In the rear end of the tube or barrel In there is slidably mounted a member 31 and the rear end of the tube 33 is tightly secured at 33 to the front or inner end of the member 31. The member 3! may, as shown, form the closure for the rear end of tube 33 and the tube thus forms a bag or bellows. If desired, a closed end bag could be used with a motion transmitting portion formed thereon or secured thereto.

A pin or Wire 40 is carried by a rod 4| which is pivoted transversely in the sleeve 30. The rod 4| extends transversely of the sleeve 3!]. The pin 40 extends into the nozzle tube 20 and when the tube is pushed into the barrel to the full limit of its movement the outer end of the pin 40 extends into the nozzle discharge opening 26, thus closing the nozzle and preventing discharge of the graphite or powder therethrough. The wire pin may be connected to the rod 4|, as shown in Fig. 8, by forming a coil in the wire 40', as shown at 49, and bending the end, as shown at 59. In use, the tube can be pulled out to the desired extent, thus accurately directing the graphite to the desired part. This is often desirable in applying graphite to insure the placing of the graphite in the desired spot or area and preventing wastage.

A handle 42, arcuate in section, has lugs 43 pivoted at 44 to the rearend of the housing or barrel [0. The handle has an arcuate upper end 45 curved to conform to the curvature'of the barrel l when the handle is;;in operative position. In order to hold the handle 42 in extended or operative position, a spring latch 48 is carried by lugs 46 on barrel in and engages a bayonet slot 4! formed in: the rear upper edge of the handle.

.The trigger.for.-operating the gun comprises an arm 50' pivoted at to a bell crank lever pivsotally mounted between lugs 46. The upper end of. arm 50 is bifurcated and the surface 50A engages the undersurfaceofarm 52 and forms a stop for limiting: .the anti-clockwise movement of arm .50, viewing Figs. 1, land 5. One arm 52 of the lever is disposed beneath the barrel or housingridzandthepther arm 53 extends upwardly through a, slot54 in the barrel and enters a ver- .tical slot.55 in therear end of the member or bag orbellows .end :31. The inner wall of this slot is inclined from the vertical, as shown at'55. When the bag 33, 37 is retracted by the spring 35, the armi53 is substantially alined with the wall 56 of the'slot 55. andtthe arm 53 forms a stop for the rearward movement of the member or bag closure -37. The leverarm 52 has a pad or buffer 58 on its upper surface engageable with the under surface of. the barrel l0.

'Thexupper end of arm 53 is rounded to cause a smooth camming action 'against'theinclined innerend wall"56 of the slot 55.

, Operation When the gun is to be carried or is not in use, the handle 42- and trigger arm 50- can be folded, as shown in Fig, l.- If desired, the gun may be hung on a, nail or hook with the handle open and for this purpose the handle 42 has a hole oropening 60.

.A charge of powderor graphite is first inserted in the barrel by-removing the'cap l3.

-'When"the gun-is-to be used, the handle 42 and trigger arm .50 are swung outwardly, as shown in Fig. 1- in'dotted lines, andthe handle is grasped and arm 5il pulled toward the handle.

When the spring35 pushes bag closure 3'! rearwardly, a partial vacuum is formed and air. is

.suckedinto the-gun barrel or housing it through the nozzle-into bag 33, 31. The operation of the ,triggera-rmr50, causes the lever 52, 53 to actuate the bag closure or member 37 and compress the bag OLbBHOWS 33, 31, thus forcing the air and powder or graphite out through the nozzle.

The nozzle tube 20 can-be pulled out to extended position to direct the graphite where desired, or can bepushed in to the desired extent, care being taken not to push it in sufficiently to causethe rod orpinAU to close the nozzle. When the gun is not in use, the nozzle tube may be pushed in to its inner limit of movement to close the nozzle bore 26.

The pushing in of tube 20 insures the cleaning of the bore of nozzle and nozzle tube 20 of any foreign matter that may be sucked in when the bag closure and bag are retracted by the spring.

-Although one specific embodiment of the invention has been particularly shown and described it will be understood that the invention is capable of modification and that changes in theconstruction and in the arrangement of the various cooperating parts may be made without departing from'the spirit or scope of the invention,.'as expressed in the following claims.

What I claim is:

' 1-. .A gun comprising a barrel, a flexible, elongated tubular sack having a fixed open end facingthe outer end of the barrel and fixed in the barrel intermediate the ends thereof, and a closed end slidable in the barrel toward the fixed end of the sack; resilient means for forcing the inner closed end of-the sack to retracted position at the rear end of the barrel, a nozzle at the front end of the barrel, a trigger, and means actuated by the trigger for-collapsing the tube by forcing the-closedend of the-sack toward the nozzle end of the barrel.

' 2. A gun comprising a barrel, a flexibla'elongated tubular sackhaving a fixed open end facin'g-the outer end'of the'barrel, a slidable closure secured to the inner end of the sack,"resilient means for'forcing'the inner end of the sack and closure to-retracted position at the rear end of the barrel, a nozzle at the front end of the barrel, a trigger, and a lever actuated by the trigger and engaging-the closure for collapsing the sack by forcingthe closed end of the sack toward the nozzle end of thebarrel.

3. A gun'comprising a ba-rrel, a fiexible,'elongated'tubular sack having its outer end open and inner end closed, the open end being fixedly secured within said barrel and the closed inner end being secured to a piston, said piston being slidably mounted in the rear or inner end of the barrel, a lever having an arm extending into the barrel and engaging a rear portion of the piston and having an arm extending outside of the barrel, said lever being I pivotally mounted on the barrel, and means for actuating said lever and resilient means for retracting the piston and lever to operative position after operation thereof.

ORLANDO D. SHONNARD.

. REFERENCES CITED The following references are of record in the file :of this patent:

UNITED STATES PATENTS Number Name Date 1 931,328 Marble Aug. 17, 1909 1,057,171 Redfield Mar. 25, 1913 1,380,802 Moe May 31, 1921 1,418,263 Kennedy May 30, 1922 1,778,291 --Burke Oct. '14, 1930 1,849,391 Wharton Mar. 15, 1932 1,986,166 Schneider Jan. 1, 1935 2,144,702 -Hulme Jan. 24, 1939 2,350,205 Warfie1d May 30, 1944 2,398,431 Mapes Apr. 16, 1946

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