US 1350989 A
Description (OCR text may contain errors)
A. E. COX.
APPLICATION FILED APR. lo, I919.
' Patented Aug.
INVE/VTUI? 1 ATTORNEY UNITED STATES PATENT QFFICE.
ALLEN E. COX,'OF PORTLAND, OREGON, ASSIGNOR OF ONE-FOURTH T0 JOSEPH C. ALLEN AND ONE-FOURTH TO ROSS C. EVANS, "BOTH OF PORTLAND, OREGON.
Specification of Letters Patent. Patented Aug. 24, 1920.
Application fiieaa rii 10, 1919. Serial No. 289,145.
T 0 all whom it mag concern: i Be it known that I, ALLEN E. Cox, a citi zen of the United States,.and' a resident of Portland, county of Multnomah, .State' of Oregon, have inventedcertain new and useful Improvements in Locks, of which. the following is a specification.
My invention relates'to locks in general,
and particularly to locksadapted to secure' ing automobiles when left standing, and the object of my invention is to provide such a lock lying entirely within the motor casing and therefore inaccessible for tampering therewith, and that when locked will completely disable the motor.
I accomplish the above object, and other desirable results that will hereinafter appear, by means'of the construction illustrated in the accompanying drawing, which is a part of this application for Letters Patent, like characters of referenceindicating like parts throughout the several views thereof, and in which:
Figure 1 isa'longitudinal sectional elevation ofYthe valve chamber of an automobile motor, showing my device installed therein.
Figs. 2, 3 and 4 are perspective details upon an enlarged scale of one of the cams, the cam shaft locking sleeve, and the looking disks respectively.
Fig. 5 is a face view of one of the locking disks. V
In general a preferred form of my device consists of a series of locking cams upon the motor cam shaft adjacent the exhaust valve operating cams thereon, said locking cams being of such a size as to hold the 6X- haust valvesopen when coacting with the respective valve stems, means to remove the operating cams from and to bring the looking cams into-coa'ction with their respective valve stems, and means to lock said locking cams in such coactive position.
In Fig. 1 the valve cam shaft 6 is shown mounted within the motor casing 7, the 0X haust valve cams 8 being mounted thereon.
Adjacent each exhaust valve cam 8 is mounted a locking cam 9, each of said lookto restupon the cylindrical portion 9 of said lock-ing cams. This cylindrical portion 9 of said locking camsis of a diameter equal to twice the height of the highest point upon the adjacent operating cam, and therefore when this portion 9 of the locking cam is brought into contact with. the respective valve stem, the valve thereon is lifted from its seat, or opened, as shown in dotted lines in Fig. 1.
When the locking cams are in this position beneath the respective valve stems, the cam shaft may be rotated without causing any motion, or closing, of the exhaust valves, and therefore the motor is inoperative until such time as the cam shaft, with the cams thereon, is returned to its initial or operat ing position.
To-move the cam shaft longitudinally into its locking position, as shown by dotted lines in Fig. I, I provide a stud 10 connected to a bell crank foot lever 11, and to return said crank shaft to its initial position when released I provide a spring 12. A wide faced cam gear 13 is also provided to mesh with timing gear 1 1 so that the longitudinal movement of camshaft .6 will notunmesh these gears.
To lock the cam shaft in position when the cams 9 are coacting with their respective valve stems, I mount upon said shaft a look ing sleeve 15 having a spline 16 thereon, which spline has openings 17 therethrough, as shown in detail in Fig. 3. The locking sleeve 15 is held longitudinally a prisoner upon cam shaft 6 by collar 18 and one of cams 9, but the shaft 6 may rotate within the locking sleeve 15.
To prevent thelo'cking sleeve 15 from rotating with the cam shaft 6 an arm 19 is formed thereon through an orifice 20 in which arm is passed a shaft 21 journaled in the motor casing,-
shown in Fig. 1.
Upon said shaft21 disks 22 are rotatably mounted, and adjacent eac'h'of said disks an arm 23 is secured to the shaft 21. Each of said arms coacts with. a pin 24 mounted upon the respective disk 22 to rotate said disk when shaft 21 is rotated, the arms 23 coacting with the respective pins 24 upon opposite sides thereof, as'shown in Fig. 1, so that rotation of the shaft 21 in one direction rotates one of said disks 22, while rotation of said shaft in the opposite direction rotates the'other of said disks.
Upon the periphery of each disk 22 is a notch 25 adapted to receive the spline 16 upon the locking sleeve 15 when the cam shaft is in normal working position, as shown in Fig. 1.
When the cam shaft is moved longitudinally to bring the locking cams 9 beneath their respective valve stems for the purpose of raising and holding the same in open position the notches 17 in the spline 16 are brought into the plane of the respective disks 22, and then each of said disks may be turned upon shaft 21. hen thus turned so that notches 25 thereon re out of aline ment with the spline 16 the cam shaft 6 is locked in inoperative position through the spline 16, locking sleeve 15 and the disks 42.
To operate shaft 21 for he purpose of rotating the locking disks 22 thereon, 1 provide a pair of bevel gears 26 and 27 connectinpshaft 21 with a shaft 28 passing through the instrument board 29 of the automobile and a combination dial upon the upper end of shaft 28 provides means for secretly operatingthe disks 22 to lock or unlock the device.
In order that the combination cannot be worked by feeling the engagement of the notches 25 with the spline 16 I provide the disks 22 with a knurled portion 22 which contacts with the ends 16 of thespline, which are also knurled, so that while these knurled portions of the disks and the respective spline ends are held in contact by the spring 12 it is impossible to operate the combination 30. v
To operate the combination it is necessary to exert slight pressure upon the foot pedal or lever ll to relieve said pressure upon the contacting knurled portions, and when so relieved the alincment of the slots with the spline 16 cannot be felt at the combination 30. 7
My invention may be made of size, and constructed of any materials deemed convenient and suitable. fora device of this character, and while I have illustrated and described a form of construction and arrangement of parts found desirable in materializing my invention, I wish to include in this application for Letters Patent all mechanical equivalents and sul'istitutes that may fairly be considered to come within the scope and purview of my invention as defined in the appended claims.
Having disclosed my invention so that others may be enabled to construct and to use the same, what I claim as new, and wish to secure by Letters Patent is:
1. In an internal combustion motor, exhaust valves; a cam shaft; exhaust valve cams upon said shaft; cams upon said shaft adjacent said exhaust valve cams; means to move said shaft longitudinally to bring said latter cams into coaction with said exhaust valves for the purpose of simultaneously opening the same and holding them open during rotation of said shaft; a nonrotatable sleeve within which said shaft is rotatably mounted; a notched spline upon said sleeve; a shaft mounted adjacent and parallel to said sleeve; notched disks freely mounted upon said latter shaft; means to rotate said latter shaft; and means mounted upon said latter shaft to rotate said disks independently therefrom.
In an internal combustion motor, exhaust valves; a cam shaft; exhaust valve cams upon said cam shaft; cams upon said cam shaft adjacent said exhaust valve cams; means to move said cam shaft longitudinally to bring said latter cams into coac tion with said exhaust valve." for the purpose of simultaneously opening), the same and holding them open during rotation of said cam shaft; and means to lock said cc shaft in position with said second i:
tioned cams in operable position relative to aid exhaust valves, allowing said cam shaft to rotate in said locked position.
3. In an internal combustion motor, exhaust valves; exhaust valve operating cams; locking cams adjacent said exhaust valve operating cams and adapted to hold exhaust valves open during rotation of the motor shaft; means to simultaneously remove said exhaust valve operating cams from coaction with said exhaust valves and to bring said locking cams into coaction with said exhaust valves; and means to lock said locking cams in said position of coaction with said exhaust valves.
4:. In an internal combustion motor, exhaust valves; a camshaft; cams upon said :am shaft roacting with said exhaust valves; means upon said shaft ad apted to coact with said exhaust valves to hold the same continuously open; means to remove said cams from coaction with said exhaust valves and to bring said means upon said cam slr into coaction with said exhaust valves; and means to lock said cams and said means upon said cam shaft in the latter mentioned positions.
5. In an internal combustion motor, means mounted upon the cam shaft of said motor to open and. hold open the exhaust valves of said motor during rotation of said cam shaft; and means to lock said first men tioned means in operative position.
In witness whereof I claim the foregoing; as my own I hereunto my signature in the presence of two witnesses at Portland, county of Multnomah, State of Qrogon, this 24th day of March, 1919.
ALLEN n. cox.
Witnesses Ross G. Evans, C. F; BLAKE.