US2069222A

US2069222A - Signal

Info

Publication number: US2069222A
Application number: US716387A
Authority: US
Inventors: Robert M Cremer
Original assignee: Individual
Current assignee: Individual
Priority date: 1934-03-19
Filing date: 1934-03-19
Publication date: 1937-02-02
Anticipated expiration: 1954-02-02

Description

Feb. 2, 1937. (:REMER I 2,069,222

SIGNAL Filed Marqh 19, 1934 82 as as fnvenior Patented Feb. 2, 1937 UNITED, STATES PATENT OFF-ICE 'lqlaims.

My invention relates to motor vehicle acces series and more specifically to arrangements for detecting abnormal conditions requiring attention'by the operator, before such conditions be- 5 come sufllciently serious to cause damage or inconvenience. It includes among its objects and advantages the elimination of unnecessary. irrelevant-or confusing signals or warnings; and. in connection with an oil sensitive signal, a mini- 10 mum of parts combined with extremely simple adjustment means readily accessible to and un- 15 device sensitive to hydraulic pressure;

Figure 2 is a wiring diagram; and Figure 3 is a section as on line 3-3 of Figure 2.

In the embodiment of the invention selected for illustration, the mechanical terminal Ill is 20 adapted to be connected with the high pressure portion 01' a lubricating system for theengine. The cup [2 is mounted on the terminal ill by riveting as at l4. The cover it is in the form of an inverted cup, but is much shallower than the cup I2, so that its conical portion lies close to the diaphragm is and prevents injury to the diaphragm by high oil pressure. The two cups are united by an annular bead 20 formed as an integral part of the rim of the cup l2, with a 30 washer 22 between the diaphragm and the lower cup. Crimping home this bead in a press of suitable power gives a satisfactory and durable oil tight joint. I have illustrated the edge of the diaphragm It also turned over the edge of the 35 upper cup I8, as at 23. The cover it includes the cylindrical neck 24 housing the spring 28 and the combined mechanical thrust termin and electrical grounding terminal 28.

The terminal 28 is in the form of an upwardly 40 opening cup receiving the lower end of the spring 26, and its upper edge is flared at 30 to provide a flange for making contact with the electrical terminal 32. The support for the electrical terminal comprises the usual insulators 34 and 36 45 clamped between the flange 38 and the nut 40. The cap 42 is threadedinside the neck 24 as at '44, and held in adjusted position against rotation by a resilient finger 48 riveted to the neck at 48 and engaging knurled teeth 50 on the cap.

50 The lower terminal 52 is supported similarly to the upper terminal 32, except that it is held against rotation about its horizontal axis. The flange 54 bears against the usual necked insulator 68, but the flat insulator 58 has its central 55 opening in the shape oi a circle with a sector cut away. and flts the stem it, which is similarly mutilated. The upper edge 01 the insulator .58 also has a sector cut away toieave a flat at 62 that abuts under the flange 20. The nut 64 clamps'the insulators in place and the nut 66' 5 clamps the lead-in wire 08 and also functions asv a lock nut. The inner end of the contact 52 is formed into an upwardly directed point 53 to make electric contact with a button 55 mounted on the diaphragm. i

Referring now to Figure 2, I have indicated the usual generator 10 electrically grounded at 12 and having the usual cut-out switch 14 for disconnecting the armature winding from the wiring carrying the battery potential when the ignition switch is turned on. until the generator is running and has built up suflicient voltage so that the battery will not discharge through the generator.

I have indicated a wire it running to the ignition switch, or other wiring energized by turning on the ignition switch; and the electrical terminal 18, disconnected from the wire 16 except when the generator is running and the cutout switch I4 closes. From the terminal 18 I run wiring in series through atell-tale light 80, and'the lower contact I2 ot the device of Figure 1. In the diagramv illustrated the light 80 is between the device and the generator, and the device itself is electrically grounded by the mechanical terminal Ill.

It will be obvious that the same generator terminal 18 may be connected to more than one instrumentality for detecting an abnormal condition. I have indicated another wire 82 connected to a second tell-tale light 84, and wires 88 and 48 connecting the tell-tale light to ground through a second instrumentality 90 which may be a gasoline gauge arranged to connect the wires 48 and II when the gasoline tank is almost empty. a thermostat for connecting said wires when the temperature of the cooling water becomes excessive, or any other detecting means designed to respond to an abnormal condition calling for attention by the operator.

The upper terminal 3 2 of the pressure sensitive device is similarly utilized, being connected in series with a third tell-tale light 92. This is a relatively very dim green light, which will light up when the engine is started, and burn continuously as long as the generator delivers voltage. Thus its iailure to light when the engine is started warns the operator not only that the generator is not functioning and the ignition is being supplied by the battery, but that his regular oil pressure gauge is his only reliance to keep track of oiling conditionsuntil the generator is fixed.

In Figure 3 I have indicated the usual generator construction involving the grounded body 9|, the grounded armature brush 9G, and the brush 98 for delivering power through the cut out switch 14 to the battery wire 16. The wire I02, from which all the tell-

tale lights

80, 84, and 92 are fed, is connected to the binding post 18 which is directly connected through the wire IM to the cation, readily adapt the same for use under.

various conditions of. service.

' I claim:

1. In a pressure detector; a housing comprising two opposed one-piece sheet metal cups united into an integral unit by bending the edge 0! one cup around the edge of the other'cup; a diaphragm and an annular sealing washer clamped between the edges of said cups; the cup on the low pressure side of the diaphragm being relatively shallow and having wall portions lying close to the undistorted position of said diaphragm, to engage the diaphragm after a predetermined displacement thereof and protect it from further distortion; the cup on the low pressure side having a central neck; contact making and breaking means actuated by the diaphragm;

' terminaL-and an insulated terminal extending laterally into said neck from one side to overlie.

and adjustable resilient means housed in said neck and opposing the yielding of said diaphragm in response to pressure; said resilient meanscomprising a cap threaded into the end of said neck,

a helical spring carried by said cap, and a mechanical terminal carried on the inner end of said spring and bearing against said diaphragm; and an insulated electric terminal extending laterally from one side into the cup on the high pressure side of the diaphragm tounderlie said contact making and breaking means.'

2. In. a pressure detector; a housing comprising two. opposed one-piecesheet metal cups=united into an integral unit by bending the edge 01 one cup around the edge of the other cup; a diaphragm and an annular sealing washer clamped between the edges of said cups; the cup on the low pressure side of the diaphragm being relatively shallow and having wall portions lying close to the undistorted position of said diaphragm, to engage the diaphragm after a predetermined displacement thereof and protect it from further distortion; the cup on the low pressure side having a central neck; contact making and breaking means actuated by the diaphragm and housed in said neck; and adjustable resilient means housed in said neck and opposing the yielding or said diaphragm in response to pressure; said resilient means comprising a cap threaded into the end of said neck, a helical spring carried byv said cap, and a cup-shaped terminal carried on the inner end of said spring and bearing against said diaphragm; said contact means comprising a flared flange on the upper edge 01 said 3. In a pressure detector; a housing comprising two opposed one-piece sheet metal cups united into an integral unit by bending the edge or onecup around the edge 01 the other cup; a diaphragm clamped between the edges of said cups; the cup on the low pressure side of the diaphragm being relatively shallow and having wall portions lying close to the undistorted position of said diaphragm, to engage the diaphragm after a predetermined displacement thereof and protect it from further distortion; the cup on the low pressure side having a central neck; adjustable resillent means housed in said neck and opposing the yielding of said diaphragm in response to pressure; said resilient means comprising a cap threaded into the end of said neck, a helical spring carried by said cap, and a terminal carried on the inner end of said spring and bearing against said diaphragm.

4. In a pressure detector; a housing comprising two opposed one-piece sheet metal cups united into an integral unit by bending the edge of one cup around the edge of the other cup; a, diaphragm between said cups; the cup on the low pressureside of the diaphragm being relatively shallow and having wall portions lying close to the undistorted position 01 said diaphragm, to engage the diaphragm alter a predetermined displacement thereof and protect it from further distortion; the cup on the low pressure side hav-' ing a central neck; and adjustable resilient means housed in said neck and opposing the,

yielding of said diaphragm in response to pressure; said resilient means comprising a cap threaded into the end 01 said neck, a helical the cup on the low pressure side of the dia-' phragm being relatively shallow and having wall portions lying close to the undistorted position of said diaphragm, to engage the diaphragm after a predetermined displacement thereof and protect it from further distortion; the cup on the low pressure side having a central neck; adjustable resilient means housed in said' neck and opposing the yielding of said diaphragm in response to pressure; said resilient means comprising an abutment having threaded engagement with the end of said neck, and a helical spring pressed toward said diaphragm by said abutment; and an insulated electric terminal extending laterally from one side into the cup on the high pressure side of the diaphragm to underlie said contact making and breaking means. i

6. In a pressure detector: 9. housing comprising opposed one piece sheet metal cups united into an integral unit by bending the edge or one cup around the edge of the other cup; a diaphragm clamped between the edges of said cups; the cup on the low pressure side of the diaphragm being relatively shallow and having wall portions lying close to the undistorted position 01' said diaphragm, to engage the diaphragm alter a predetermined displacement thereof and protect, it from further distortion; the cup on the low pressure side having a central neck; adjustable resilient means housed in said neck. and opposing the yielding ot said diaphragm in response to pressure; said resilient means comprising an abutment having threaded engagement with the end of said neck, and a helical spring pressed toward said diaphragm by said abutment; ,and an insulated electric terminal on the high pressure side of the diaphragm to underlie said contact making and breaking means.

7. In a'pressure detector: a housing comprising opposed one piecezsheet metal cups united into an integral unit by bending the edge of one cup around the edge of the other cup; a diaphragm clamped between the edges of said cups; the cup on the low pressure side oi the diaphragm being relatively shallow and wall portions lying-close to the position of said diaphragm, to engage the diaphragm after a prohigh pressure side of the diaphragm to underlie 1o 6 said contact making and breaking means.

M Rome 1:.