US2362211A

US2362211A - Electrical control system

Info

Publication number: US2362211A
Application number: US487053A
Authority: US
Inventors: Roscoe I Markey
Original assignee: POLLAK Manufacturing Co
Current assignee: POLLAK Manufacturing Co
Priority date: 1941-08-07
Filing date: 1943-05-14
Publication date: 1944-11-07
Anticipated expiration: 1961-11-07

Description

Y E K R A M R ELECTRICAL CONTROL SYSTEM Filed May 14, 1943 2 Sheets-Sheet 1 PW Ow PW mm w? v UI @N Ob @N @N Oh 5 O0 Iv nix .TN on N mu l mw Q INVENTOR ROSCOE I. MARKET ATTORNEY R. l. MARKEY ELECTRICAL CONTROL SYSTEM Nmr. 7', 194% Filed May 14, 1943 FIGS.

2 Sheets-Sheet 2 INVENTOR ROSCOE I. MARKET 2%;. min;

ATTORNEY Patented Nov. 7, 1944 A UNITED STATES ELECTRICAL CONTROL SYSTEM Roscoe I. Markey, East Orange, N. J., assignor to Pollak Manufacturing Company,

Arlington,

N. J., a corporation of New Jersey Original application August 7, 1941, Serial No. 405,729. Divided and this application May .14, 1943, Serial No. 487,053

1 Claim.

The invention relates to an electrical control system for bomb releasing shackles or racks,

The principal object of the present invention is to provide an electrical control system whereby a bomb in an adjoining section cannot be electrically connected in the release circuit until the bomb has actually been released from the pre- Fig. 2 is a cross sectional view with parts in elevation, the solenoid core being in a position it would assume with a bomb in the rack;

Fig. 3 is a fragmentary detail sectional view showing the position of the solenoid core after the bomb has been dropped and before the current has been cut;

4 is a view similar to Fig; 3 showing the position of the core after the current has been cut; and

Fig. 5 is a Wiring diagram.

This application is a divisional application of my cop'ending application Serial No, 405,729, filed August '7, 1941.

'Referring again to the drawings the framework or supporting structure of the shackle comprises two spaced plates I1ll0, resistance welded or otherwise 'secured to hinge-members l2 and I3.

The hinge members comprise yokes to which short rods [4 are resistance welded or otherwise secured at their connecting portions. The yokes are bifurcated so as to form openings [5 to permit of entry of the supporting members of the bomb rack or hanger, the exposed parts of the rods I 4 acting as bearings therefor.

Hooks l6 and I1 are pivoted at 18 and IS in the plates l0 and hinge-members 12-13 at either end of the shackle. The hooks l6 and I! in the locked position of the shackle as shown in Fig. 1 sufficiently close the entrances of openings 20 to support rings or other suitable members 2| which carry the bomb (not shown), thus providing a two point support 'forthe bomb.

The upper portions of the hooks l6 and I! are pivoted at "22 to a longitudinall extending tie member 23. It will be apparent the hooks l6 and I1 and tie member 23 are movable simultaneously, "and furthermore that the weight of the bombas ithangs "on the hooks tends to move Referring the tie-member toward the right in Fig, 1 and causes the hooks to move away from the openings Releasable locking means for tie member and its hooks are provided and this means will now.

be described. The hook 16 has an extending toe 24 the free end of which engages a notch 25 in a pawl 26 when the parts are in the locked position of Fig. 1. The pawl 26 is pivoted in the side plates [0 at '21 and is normally urged toward its releasing position by a spring 28.

The pawl 26 has an arm 29, the underside of which in the locked position engages a pin 30 forming part of the core of the solenoid 34 hereinafter described. It is thus thought to be apparent that when the pin 30 on the core of the solenoid is retracted the pin will move out of the path of the arm 29 and the weight of the bomb will instantly cause the toe 24 to be disengaged from the notch 25 in the pawl 26 and the bomb will be dropped as hereto-fore described. The pawl 26 is provided with a finger piece 32 iex tending below the side plates so as to permit of easier manipulation.

Safety means are provided operating in conjunction With the solenoid whereby a bomb cannot be dropped should the solenoid become inadvertently energized such as by a short circuit or other things that might happen in an emergency, this safety means forming no part of "the present invention and will not be described.

The solenoid 3 1 which is mounted on one of the side plates I0 comprises a casing 40 with the usual winding 41. The core 42 is forced outwardly or to what might be termed the locked or holding position by a spring 43. In this position it will, be apparent as heretofore described that the pin '30 on the end of the solenoid core will engage the pawl 26 and the mechanism will be held in itslocked position.

' Simple means comprising this invention are provided whereby the bomb shackle in the adjoining section of the rack cannot be electrically connected in the release circuit until the bomb has actually been released from the preceding station.

This means comprises a fork mounted on the outer end of the solenoid core and engaging plungers 6| on a pair of

switche

62, 63. These switches are diagrammatically illustrated in Fig. 3 and while they may be of any desired quick action construction they preferably are of a type illustrated in Patent No. 1,960,020. The prongs of the fork are resilient or in other words comprise an elastic or spring element. This construction prevents excessive loads on the switches and provides an adjustment which is efiected at the time of installation. Thus, if the switches are not accurately positioned, the prongsmay be slightly spread or'pushed toward each other depending upon conditions. The switch 62 as illustrated particularly in Fig. 5 is a single pole normally open switch or in other words the circuit is always open until the plunger BI is depressed by one of the prongs 64 of the fork 60 which is carried by the core of the solenoid. The plunger SI of the switch 62 is alwaysdepressed when the shackle is loaded, that is when a bomb is in position in the shackle. In the position of Fig. 5, the bomb has been dropped and it will be noted the circuit to the fixed contact 65 is broken.

The switch 62 controls a pilot light circuit 66, the pilot light 61 of said circuit preferably be.- ing located in the bombardiers station. It will be understood there is ,a pilot light at the bombardiers station for each bomb shackle and its respective switch 62. All of the pilot lights 6'! and the switches 62 may be suitably wired together and controlled by a master switch 68. From the foregoing it'is thought to be apparent when the shackle is loaded the plunger 6| will be depressed as shown in Fig. 2, the light circuit completed and the pilot light will inform the bombardier the bomb is in position to be dropped. After the bomb has been dropped the circuit will be broken as hereinafter described and the absence of the light will enable the bombardier to know there is no bomb in that particular shackle.

The switch 63is a single pole double throw switch in which the movable contact" is al- The line 19 which connects to the contact 11 to complete the circuit either to the solenoid 3| or to the switch 63' on the succeeding shackle leads from a switch 63" on the preceding shackle or to a battery or other source of power 80 located in the vicinity of the first shackle of the series. The master switch 14 is preferably located in the bombardiers station and taps into the circuit or line 19 between the battery or source of power 80 and the first shackle in the series. On succeeding shackles the line 18 becomes in effect the line 19 to connect the feed line to the switch. Thus *the current from the battery 80 through the masterswitch I4 always flows through line 19 leading to the switch 63 on the first shackle in the series and on through line '18 to similar switches on succeeding shackles.

As the parts are shown in Figs. 4 and 5 the master switch I4 has been closed to energize the solenoid 3| connected to the switch 63, the bomb in that respective shackle has been dropped and the matter switch 14 again opened as is shown in said figures to cut the current and .allow the solenoid spring to retract the solenoid core permitting the plungers BI to move outwardly. At

, this time the movable contact 10' on the switch ways in engagement with one or the other of the fixed contacts H or 12. When the shackle is loaded and the plunger SI of the switch 63 is depressed by one of the prongs 64 the moveable contact 10 engages the fixed contact H and the current is directed through the connection 13 to the wiring 4| of the solenoid 3! of the bomb shackle. When this circuit is closed by a master switch hereinafter referred to the solenoid will operate the mechanism heretofore described to drop the bomb, the solenoid assuming. the position of Fig. 3.

After the bomb has been dropped and the cir- Connected to the contact 12 is a feed wire 18 which directs the curi rent to a fixed contact 11' on a similar switch illustrated at 63, the. same being located on the succeeding shackle, the parts of which are designated by the same reference numerals, primed. From the foregoing it is thought to be apparent that a simple, foolproof and efficient arrangement has been devised whereby in one position of the single pole double throw switch only the solenoid on the particular shackle from which the bomb is to .be dropped may be energized and no current can be supplied to the succeeding shackles until that bomb has been dropped. Thus when the master switch 14 is closed, it energizes only one solenoid and drops one bomb. -Before another bomb can be dropped the master switch 14 must be opened, then closed, and like- 63' of the succeeding shackle is engaging the fixed contact H. to direct the current to its solenoid through the lead 13'. When the master switch 14 is again closed the solenoid con-' nected to the switch 63' will be energized and the bomb in its shackle dropped.

In Fig. 5 alternate current feed lines are illustrated in broken lines. If the illustrated shackle were to be considered the first in the series the connection 19 would lead to the battery 80. If

the illustrated shackle were an intermediate one in the series the line 19 would lead to a switch 63" on a preceding shackle.

It is to be understood the plungers 6| are in line and are operated simultaneously. As heretofore stated when the shackle is loaded the plungers 6| are depressed, the pilot light circuit is completed and the circuit leading the current to thesolenoid is formed so that the solenoid may be energized at the proper time by the master switch 14. been energized and its core 42 moved to operate the control and release mechanism the prongs 64 on the fork 60 maintain contact with both plungers Bl. After the bomb has been dropped and the current has been cut by opening the master switch 14 the solenoid spring 43 throws the core 42 beyond the point of loaded position, thus permitting the plungers 6| to return to their normal position and break the pilot light circuit and direct the current to the switch 63 on the succeeding shackle. If the hooks l6, I!

have not opened, it is impossible for the solenoid core to move toqits opposite end of travel so as to permit of the succeeding shackle being connected into the circuit, as the solenoid core will contact the top edge of the hook [6, thus preventing any possibility of jamming bombs in the bomb bay. I

Changes in details of construction and arrangements of 'parts' may be made by one skilled in the art without departing fromthe spirit of the invention as exemplified in the appended claim.

I claim:

An electrical control system for a series of bomb releasing shackles, said control system hav: ing in combination a solenoid-plunger mechawise with all succeeding bombs to be dropped.

After the solenoid has the releasing mechanism of the shackle and with the switch of the shackle in such a manner that it engages the actuating mechanism of the switch and closes a circuit through the first mentioned contact of the switch when the bomb supporting means of the shackle is in bomb holding position, and is moved to a position out of engagement with the actuating means of the switch subsequent to its actuation to release the releasing mechanism of the shackle with a resulting closing of the circuit through the second mentioned contact of the switch.

ROSCOE I. MARKEY.