US1524944A - Shift lock - Google Patents

Description

MORRIS SHIFT L Filed June; 1924 Patented Feb. 3, 1925.

PATENT OFFICE.

HAROLD L. MORRIS, OF BERKELEY. CALIFORNIA, ASSIGNOB. T RUGKST'ELL .SALES AND MANUFACTURING COIJZPAIIY, GF BERKELEY, CALIFORNIA, AzCORPOEATION 0 F CALIFORNIA.

SHIFT LOCK.

T 0 all whom it may concern:

Be it known that I, HAROLD L. MORRIS, a citizen of the United States, residing at Berkeley, county of Alameda, and State of California, have invented new and useful Improvements in Shift Locks, of which the following is a specification.

This invention relates to shifting devices for gears, clutches, sleeves, and the like elements, which elements are ordinarily mounted for axial movement on a shaft of the mechanism being operated.

Insuch devices ofthe type comprising my invention, a rotatable shaft has a shifting yoke-mounted thereon and connected to the element to be shifted. Rotation of the shaft operates through the yoke to shift the element axially to different positions along its shaft. li leans must bepr-ovided for holding the element in anyone of these positions, and it is the primary object of my invention to provide improved means in combination with the device for performing this function.

It is another object of my invention to provide. a very compactly arranged resiliently acting means between the shifter shaft and the element to be shifted, whereby the element will be auto-matically held in any one of its shifted positions.

It is a further object of my invention to )YOVlClG an axially movable spring pressed plunger mounted preferably in the body portion of the yoke and cooperating with notches carried by the element for automatically holding the element in any one of its shifted positions.

With the above and other objects in view, my invention consists in the features of construction and operation set forth in the following specification, and illustrated in the accompanying drawing. In such drawing annexed hereto and forming a part of this specification, I have shown one specific embodiment of my invention, but it will be understood that the invention can be otherwise embodied, and that the drawing is not to be construed as defining or limiting the scope of the invention, the claims appended to this specification being relied upon for that purpose.

1924. Serial No. 717,520.

Referring to the figures ofithe drawing:

Fig. 1 is a fragmentary sectional-view of my improved shifting device cooperating with an element to be shifted thereby.

Fig. 2 is a sectional view :thereof taken on line 22-of Fig. 1.

Referring more specifically to the drawing by reference characters, 1 indicates a portion of a casing in which is rotatably mounted a shifter shaft 2. A. yoke 3 is mounted on a squared portion 4 ofthis shaft between the bearings 5 and 5 of the casing. The yoke comprises a body portion 6 ad jacent the shaft 2 and a forked portion 7.

The element 8' to be shifted is mounted for shifting movement on a shaft 9 extending transversely of the shaft '2. A U-shaped block or shoe 10 supported on pivot pins 11 in the forked portion/7 of the yoke is'loosely seated in an annular groove 12in this element. From the construction described, it will be apparent that rotation of the shaft 2 in one direction or the other will operate to axially shift the element 8 respectively in one direction or the other along its shaft 9.

My improved means for holding the element in any of its shifted positions comprises a plunger 13 mounted for longitudinal movement in the body portion 6 of the yoke. A compression spring 14: normally forces the plunger upwardly into engagement with the bottom of the shoe 10. This portion of the shoe has V-shaped, notches 15 formed therein for receiving the end of the plunger. While only two of such notches are shown in the drawing, it*will be understood that as many notches are provided as the element has shifted positions.

The shaft 2 can be rotated by means of an arm 16 secured to the end thereof. A rod 17 connected to the free-end of the arm may be extended to a position convenient to the operator. It will be understood that movement of the rod longitudinally in one direction or the other will rotate the shaft 2 and shift the element 8 axially in one direction or the other, respectively.

In Fig. 1 the element 8 is shown in full lines in its right hand shifted position, and the plunger 13 is engaged with the left hand notch 15 to hold the element in such position. Movement of the rod 17 downwardly will operate to shift the element to its left hand position, the spring 14 compressing to permit rearward movement of the plunger 13 and thereafter expanding to force the plunger into the right hand notch and hold the element in itsleft hand position. This latter position is shown in dot and dash lines in Fig. 1. In each of these holding positions, it will be noted that the plunger is to one side or the other of the vertical, whereby it operates to very securely perform its holding function.

The construction and operation of my invention and its several advantages will be apparent without further description herein. It should be particularly noted, how ever, that my improved holding means is most compactly arranged entirely within the shifting yoke. This arrangement eliminates the protruding and objectionable parts usually incident to such mechanisms, and fully protects the mechanism from breakage, dust, and other foreign matter. The mechanism is furthermore entirely automatic in operation and performs its holding function with great security.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

l. A shafting device comprising the combination of a rotatable. shaft, a laterally extending yoke connected to the shaft and adapted to engage an element to be shifted, and a longitudinally movable spring pressed plunger carried by the shaft and having a wedging engagement with the element for holding the element in its different shifted positions.

2. A shifting device comprising the combination of a rotatable shaft, a laterally extending yoke connected to the shaft and adapted to engage an element to be shifted, and means having a yielding engagement with the element for holding the element in its different shifted positions.

3. A shifting device comprising the combination of a rotatable shaft, a laterally extending yoke connected to the shaft and adapted to engage an element to be shifted, and a spring pressed plunger carried by the yoke and cooperating with spaced notches for holding the element in its different shifted positions.

-l. A shifting device comprising the combination of a rotatable shaft, a laterally extending yoke connected to the shaft, the yoke comprising a body portion adjacent the shaft and a forked portion adapted to be connected with an element to be shifted, and a spring pressed plunger carried in the said body portion between the shaft and forked portion for holding the element in its different shifted positions.

5. In combination, a shaft, an element shiftable axially thereon, a second shaft extending transversely of the first shaft, a yoke connected for rotation with the second shaft and to the said element, rotation of the second shaft being adapted to shift the element to different axial positions, and means between the second shaft and element for holding the element in such positions.

6. In combination, a shaft, an element shiftable axially thereon, a second shaft extending transversely of the first shaft, a yoke connected for rotation with the second shaft and to the said element, rotation of the second shaft being adapted to shift the element to different axial positions, and means housed within the yoke between the second shaft and element for holding the element in such positions.

7. In combination, a shaft, an element shiftable axially thereon, a second shaft extending transversely of the first shaft, a yoke connected for rotation with the second shaft and to the said element, rotation of the second shaft being adapted to shift the element to different axial positions, and resiliently acting means between the second shaft and element for holding the ole ment in such positions.

8. In combination, a shaft, an element shiftable axially thereon, a second shaft extending transversely of the first shaft, a yoke connected for rotation with the second shaft and to the said element, rotation of the second shaft being adapted to shift the element to different axial posit-ions, and means including a spring pressed plunger between the second shaft and element and cooperating with the yoke and element for holding the element in such positions.

9. In combination, a shaft, an element shiftable axially thereon, a second shaft extending transversely of the first shaft, a yoke connected for rotation with the second shaft and to the said element, rotation of the second shaft being adapted to shift the element to different axial positions, and a spring pressed plunger carried by the yoke and cooperating with notches carried by the element for holding the element in such positions. I

10. In combination, a shaft, an element shiftable axially thereon and provided with an annular groove therein, a block mounted in the groove, a second shaft extending transversely of the first shaft, a yoke connected for rotation with the second shaft and to the said block, rotation of the second shaft being adapted to shift the element to different axial positions. and means including a spring pressed plunger and cooperating notches therefor between the second shaft and element for holding the element in such positions.

11. In combination, a shaft, an element shaft being adapted to shift the element to shiftable axially thereon and provided with different axial positions, and a spring an annular groove therein, a block mounted pressed plunger carried by the yoke and co- 10 in the groove, a second shaft extending operating with notches in the block for 5 transversely of the first shaft, a yoke conholding the element in such positions.

nected for rotation with the second shaft and to the said block, rotation of the second HAROLD L. MORRIS.

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