US2448765A

US2448765A - Trigger mechanism

Info

Publication number: US2448765A
Application number: US621768A
Authority: US
Inventors: Browning Leander
Original assignee: Individual
Current assignee: Individual
Priority date: 1944-04-14
Filing date: 1945-10-11
Publication date: 1948-09-07
Anticipated expiration: 1965-09-07

Description

Sept- 7, 1948. L. BRowNxNG TRIGGER MECHANISM Original Filed April 14, 1944 a7 if Patented Sept. 7, 1948 UNITED STATES PATENT OFFICE TRIGGER MECHANISM Leander Browning, Greenwood, Ind.

3 Claims.

This application is a division of my copending application Serial Number 530,975, filed April 14, 1944, upon which Patent Number 2,391,676 issued on December 25, 1945.

The object of my invention is to provide an improved trigger mechanism by means of which a pressure-affected element may be held, released, and guided.

The accompanying drawings illustrate an embodiment of my invention in a pruning tool, but it will be readily understood that the novel mech anism may be useful in other embodiments.

Fig. 1 is an elevation of a pruning tool in which the improved trigger mechanism is incorporated;

Fig. 2 is a fragmentary axial section of the trigger mechanism and associate parts; and

Fig. 3 is a section on line 3-3 of Fig. 2.

In the drawings, I indicates a tubular main body in which is mounted a rod I2 biased in one direction by one or more springs I5 and provided with a piston I4 and packing I4 fitting within body I0.

Rod I2, intermediate its length, is diametrically slotted at 20 (Fig. 2) to receive the latch 2| pivoted at 22. Latch 2| is medially slotted at its free end to form a latch nger 23 and a stop finger 24. The width of latch 2l exceeds the Idiameter of rod I2 so that it projects radially at opposite sides of rod I2 and extends into

keyways

25, 26 formed in the guide ring 2 mounted within barrel I0. Pivoted at 28, in keyway 25, is the trigger 29 having an abutment shoulder 33 for reception of the tip of latch iinger 23, and a nger 3| overlying said finger 23. Rod I2 within the area between

fingers

23 and 24, is transversely bored to form a pocket 32 within which is seated a spring 33 engaging finger 23 and normally biasing the latch 2I to the position shown in Fig. 2.

Trigger 29 is biased to the position shown in Fig. 2 by spring 34 and, in order to ease operation of the trigger, I provide a linger lever 35 pivoted at 36 on yoke 31 secured to barrel III and connected to the trigger by link 38.

Latch 2I sliding in the

keyways

25 and 26 prevents rotation of plunger rod I2 during its reciprocation, and when the parts are in normal, at rest, position (Fig. 2), the tip of finger 23 engages shoulder 30 substantially in line with pivot 28. When finger lever 35 is pulled in the direction indicated by the arrow (Fig. 2) the free end of the latch 2I is swung to the left to clear the latch from obstruction by the trigger.

The lower end of barrel III is closed by the axially bored plug 4I] provided with sealing cup 4I which provides an air-tight association with barrel I I).

Rod I2 may be moved against the bias of springs I5 by any suitable means, as by air pressure applied to piston I4-I4.

I claim as my invention:

1. Trigger means, comprising a main body, a reciprocable member carried by the main body, a pivoted latch carried by said reciprocable member and biased laterally thereof, and a trigger comprising a plate pivoted on an axis transverse of the line of movement of the reciprocable member, said plate having an abutment surface engageable by the latch to restrain movement of said reciprocable member in one direction and a finger engaging said latch to swing its free end away from said abutment surface to eliminate said restraint, one edge of said plate projecting laterally beyond the reciprocable member with said edge slidable in a guide groove extending lengthwise of the line of movement of the reciprocable member.

2. Trigger means, comprising a main body, a reciprocable member carried by the main body, a pivoted latch carried by said reciprocable member, spring means biasing said latch radially outwardly relative to said member, and a trigger pivoted on Van axis transverse of the line of movement of the reciprocable member, said trigger having an abutment surface engageable by the latch to restrain movement of said reciprocable member in one direction and having a nger engaging said latch to swing its free end away from said abutment surface to eliminate said restraint.

3. Trigger means, comprising a main body, a reciprocable member carried by the main body, a, pivoted latch carried by said reciprocable member and biased laterally thereof, and a trigger pivoted on an axis transverse of the line of movement of the reciprocable member, said trigger having an abutment surface engageable by the latch to restrain movement of said reciprocable member in one direction and said trigger having a finger angularly related to said abutment surface and movable therewith, said finger being engageable with said latch, upon movement of said trigger in one direction, to shift said latch against its bias positively out of engagement with said abutment surface.

LEANDER BROWNING.

REFERENCES CITED UNITED STATES PATENTS Number Name Date Barthel Oct. 21, 1879