Exhibit 99.1

Analyst Contact:	Greg Slome
	Sparton Corporation
	Email: gslome@sparton.com
	Office: (847) 762-5812
Media Contact:	Mike Osborne
	Sparton Corporation
	Email: mosborne@sparton.com
	Office: (847) 762-5814
Investor Contact:	John Nesbett/Jennifer Belodeau
	Institutional Marketing Services
	Email: jnesbett@institutionalms.com
	Office: (203) 972-9200

FOR IMMEDIATE RELEASE

Sparton Corporation Reports $0.25 EPS for Fiscal 2011 Third Quarter;

Net Sales Increase 30%

SCHAUMBURG, IL. — May 10, 2011 — Sparton Corporation (NYSE: SPA) today announced results for the third quarter of fiscal 2011 ended March 31, 2011. The Company reported third quarter operating income of $2.7 million and net income of $2.5 million, or $0.25 per share, versus operating income of $0.4 million and net income of $0.7 million, or $0.07 per share, for the third quarter of fiscal 2010.

Consolidated results for the three and nine months ended March 31, 2011 and 2010:

	Third Quarter					First Nine Months of Fiscal Year
($ in 000’s, except per share)	2011		2010			2011			2010
Net sales	$	50,352	$	38,637		$	142,450		$	133,964
Gross profit		8,202		5,569			22,775			21,076
Restructuring / impairment charges		—		238			77			2,121
Gain on acquisition		—		—			(2,400	)		—
Operating income		2,679		378			8,364			3,466
Provision for (benefit from) income taxes		115		(132	)		215			(2,027	)
Net income		2,523		689			8,038			5,342
Income per share – basic		0.25		0.07			0.79			0.54
Income per share – diluted		0.25		0.07			0.78			0.54

Highlights for the fiscal 2011 third quarter are summarized below:

• Net income of $2.5 million, or $0.25 per share.

• Gross profit of $8.2 million, Sparton’s largest quarterly gross profit in over five years.

• Net sales of $10.8 million and net income of $1.0 million resulting from the acquired Colorado medical businesses.

• Completed acquisition of Byers Peak, Incorporated (“Byers Peak”) contract manufacturing business located near Denver, Colorado.

• Sold last remaining idle facility in Albuquerque, New Mexico, for approximately $4.2 million.

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Sparton President and CEO Cary Wood commented, “We are pleased to report $0.25 income per share for our third quarter of fiscal 2011. Increased sales from our DSS and EMS businesses along with an enhanced gross margin percentage from our EMS business drove the improvement over our second quarter results, while our newly acquired Frederick, Colorado medical device business continues to exceed our expectations and provide significant incremental sales and margin contribution over our prior year results.”

Byers Peak Acquisition

Mr. Wood continued, “We are extremely pleased to have closed the Byers Peak acquisition this past March. As part of this acquisition, we intend to consolidate the Byers Peak operations into the Company’s Frederick, Colorado facility and the anticipated efficiencies from this consolidation made this acquisition even more compelling beyond the strategic fit and acquired workforce. We anticipate that this strategic addition to our Medical business will be accretive to earnings no later than the second quarter of fiscal 2012.”

On March 4, 2011, the Company completed the acquisition of certain assets and assumption of certain liabilities of Byers Peak in an all-cash transaction valued at approximately $4.4 million, subject to certain post-closing adjustments. The transaction was financed through the use of Company cash and included a holdback of approximately $0.4 million which is available to fund any potential seller indemnification obligations in relation to the agreement.

The acquired business, which is reported in the Company’s Medical segment, provides further expansion into the therapeutic device market, diversifies Sparton’s customer base, and further expands the Company’s geographic reach into the western United States. Additionally, the acquisition increases Sparton’s offerings with the inclusion of field service and refurbishment capabilities. Byers Peak primarily manufactures medical devices for OEM and emerging technology companies in the Therapeutic device market, including devices for surgical navigation, RF energy generation, non-invasive pain relief, arterial disease, and kidney dialysis. It also has a field service and installation group that primarily provides water filtration and disinfection systems for the medical industry as well as device refurbishment programs. Additionally, Byers Peak provides electromechanical device manufacturing support for a limited number of customers outside of the medical industry.

Consolidated Results for the Quarter

Net sales for the three months ended March 31, 2011 were $50.4 million, an increase of 30% from the prior year quarter, due to additional sales in the current year quarter from the acquisitions of Delphi Medical and Byers Peak, increased U.S. Navy sonobuoy sales from our DSS segment and improved Medical sales at our Ohio facility.

Consolidated gross profit percentage for the three months ended March 31, 2011 increased to 16% compared to 14% in the same quarter last year. The increased margin reflects improved results from the Company’s EMS and Medical segments, including higher margins achieved at the newly acquired Colorado Medical businesses, partially offset by the unfavorable impact of the decreased contribution of foreign sonobuoy sales from the Company’s DSS segment.

Selling and administrative expenses as a percentage of sales decreased to 10% of sales from 11% in the prior year quarter.

Sparton incurred no restructuring/impairment charges for the three months ended March 31, 2011 compared to $0.2 million of restructuring/impairment charges in the same quarter of fiscal 2010.

The Company recorded income tax expense of approximately $0.1 million for the three months ended March 31, 2011 compared to an income tax benefit of approximately $0.1 million for the three months ended March 31, 2010. The fiscal 2010 benefit reflects the release of $0.2 million of deferred tax asset valuation allowance in relation to tax regulation changes related to carryback provisions.

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Segment Results for the Quarter

Medical Device (“Medical”)

Medical sales in the three months ended March 31, 2011 included $10.8 million of additional sales from the acquisitions of Delphi Medical and Byers Peak. Excluding these fiscal year 2011 incremental sales, Medical sales increased approximately $0.3 million in the three months ended March 31, 2011 as compared with the same quarter last year. This increase in comparable sales reflects increased demand for certain programs, partially offset by the disengagement of one customer during fiscal 2011.

The gross profit percentage on Medical sales increased to 14% from 10% for the three months ended March 31, 2011 and 2010, respectively. This increase in margin on Medical sales reflects the Company’s continued implementation of Lean Enterprise, product mix, its cost management efforts to mitigate decreased capacity utilization at the Company’s Strongsville, Ohio facility earlier in the year and higher margins achieved at the Company’s Frederick, Colorado facility.

Selling and administrative expenses relating to the Medical segment were $1.4 million and $1.0 million for the three months ended March 31, 2011 and 2010, respectively, reflecting increased direct and allocated expenses related to the Company’s recent acquisitions and increased business development efforts in the current fiscal quarter, partially offset by fiscal 2010 bad debt expense.

Electronic Manufacturing Services (“EMS”)

EMS sales for the three months ended March 31, 2011 decreased approximately $0.8 million as compared with the same quarter last year. This decrease primarily reflects certain program losses, primarily with two customers, partially offset by increased intercompany sales.

The gross profit percentage on EMS sales increased to 11% for the three months ended March 31, 2011 compared to 5% for the three months ended March 31, 2010. The quarter over quarter comparison reflects favorable product mix and improved operating performance, partially offset by the impact of the overall decrease in sales volume.

Selling and administrative expenses relating to the EMS segment were $0.8 million for the three months ended March 31, 2011 compared to $0.9 million for the three months ended March 31, 2010, reflecting a decrease in allocated corporate selling and administrative expenses, partially offset by increased business development and safety efforts in the current fiscal quarter.

Restructuring/impairment charges relating to the EMS segment were $0.2 million for the three months ended March 31, 2010. No restructuring/impairment charges relating to the EMS segment were recognized in the current year quarter.

Defense & Security Systems (“DSS”)

DSS sales for the three months ended March 31, 2011 increased by $2.1 million from the third quarter of fiscal year 2010, reflecting higher U.S. Navy sonobuoy production and, to a lesser extent, increased digital compass sales in the current year quarter. Partially offsetting these increases were reductions in sonobuoy sales to foreign governments and in engineering sales revenue.

The gross profit percentage on DSS sales for the three months ended March 31, 2011 was 20% compared to 24% for the three months ended March 31, 2010. Gross profit percentage in the current year quarter was adversely affected by decreased sales to foreign governments as compared to the prior year quarter, partially offset by favorable product mix on increased U.S. Navy sonobuoy sales.

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Selling and administrative expenses relating to the DSS segment were $0.9 million for the three months ended March 31, 2011 compared to $0.7 million for the three months ended March 31, 2010, reflecting increased direct selling and administrative expenses due to increased business development efforts in the current fiscal quarter, partially offset by a decrease in allocated corporate selling and administrative expenses.

The Company incurred $0.3 million of internally funded research and development expenses in the three months ended March 31, 2011. No internally funded research and development expense was incurred in the prior year period.

Liquidity and Capital Resources

Mr. Wood commented, “During this past quarter, we completed the $4.2 million sale of our closed facility in Albuquerque, New Mexico and acquired the contract manufacturing business of Byers Peak for $4.4 million, subject to certain post closing adjustments. The replacement of this idle asset with the productive revenue generating operations of our most recent acquisition is further progress toward the accomplishment of our strategic goals.”

As of March 31, 2011, the Company had $26 million in cash and cash equivalents and no outstanding borrowings against available funds on its $20 million revolving credit facility provided in August 2009 by PNC Bank, National Association. The credit facility is subject to certain customary covenants which were met at March 31, 2011.

Outlook

Mr. Wood further commented, “We were pleased with the efficient integration of the Delphi business earlier in the year, particularly with that business becoming accretive to earnings ahead of schedule, and we are looking forward to successfully executing on the consolidation and integration of the Byers Peak business into our Frederick, Colorado facility beginning in the fourth quarter of fiscal 2011. Our recently announced new business wins with Talyst in our Medical segment and Tampa Microwave in our EMS/Complex Systems segment are early indicators that the Company’s new marketing initiative and recently expanded business development resources are beginning to gain momentum. We remain optimistic that our continued investment in business development resources and internal research and development efforts will position the Company for future growth. Additionally, we remain watchful for complementary strategic acquisition targets as part of our growth plan and are continuously evaluating new opportunities.”

Conference Call

Sparton will host a conference call with investors and analysts on May 12, 2011 at 11:00 a.m. CST to discuss its fiscal year 2011 third quarter financial results, provide a general business update, and respond to investor questions. To participate, callers should dial (800) 954-0603. Participants should dial in at least 15 minutes prior to the start of the call. A Web presentation link is also available for the conference call: https://www.livemeeting.com/cc/gc_min_pro_usa/join?id=R5N4QC&role=attend. Investors and financial analysts are invited to ask questions after the presentation is made. The presentation and a replay of the call will be available on Sparton’s Web site: http://www.sparton.com in the “Investor Relations” section for up to two years after the conference call.

About Sparton Corporation

Sparton Corporation (NYSE:SPA), now in its 111^th year, is a provider of complex and sophisticated electromechanical devices with capabilities that include concept development, industrial design, design and manufacturing engineering, production, distribution, and field service. The primary markets served are in the Medical Device, Electronic Manufacturing Services, and Defense & Security Systems industries. Headquartered in Schaumburg, IL, Sparton currently has six manufacturing locations worldwide. The Company’s Web site may be accessed at http://www.sparton.com.

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Safe Harbor and Fair Disclosure Statement

Certain statements described in this press release are forward-looking statements within the scope of the Securities Act of 1933, as amended (the “Securities Act”), and the Securities Exchange Act of 1934, as amended (the “Exchange Act”). Forward-looking statements may be identified by the words “believe,” “expect,” “anticipate,” “project,” “plan,” “estimate,” “will” or “intend” and similar words or expressions. These forward-looking statements reflect Sparton’s current views with respect to future events and are based on currently available financial, economic and competitive data and its current business plans. Actual results could vary materially depending on risks and uncertainties that may affect Sparton’s operations, markets, prices and other factors. Important factors that could cause actual results to differ materially from those forward-looking statements include, but are not limited to, Sparton’s financial performance and the implementations and results of its ongoing strategic initiatives. For a more detailed discussion of these and other risk factors, see Part I, Item 1A, Risk Factors and Part II, Item 7, Management’s Discussion and Analysis of Financial Condition and Results of Operations, in Sparton’s Form 10-K for the year ended June 30, 2010, and its other filings with the Securities and Exchange Commission. Sparton undertakes no obligation to publicly update or revise any forward-looking statement as a result of new information, future events or otherwise, except as otherwise required by law.

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SPARTON CORPORATION AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

(UNAUDITED)

(Dollars in thousands, except share data)

	March 31, 2011			June 30, 2010 (a)
Assets
Current Assets:
Cash and cash equivalents	$	26,119		$	30,589
Restricted cash		—			3,162
Accounts receivable, net of allowance for doubtful accounts of $118 and $532, respectively		22,073			17,967
Inventories and cost of contracts in progress, net		40,282			26,514
Income taxes receivable		304			296
Deferred income taxes		57			57
Property held for sale		—			3,900
Prepaid expenses and other current assets		1,986			1,449
Total current assets		90,821			83,934
Property, plant and equipment, net		10,831			8,924
Goodwill		20,625			19,141
Other intangible assets, net		5,914			4,803
Other non-current assets		2,869			3,059
Total assets	$	131,060		$	119,861
Liabilities and Shareholders’ Equity
Current Liabilities:
Current portion of long-term debt	$	124		$	121
Accounts payable		17,116			13,045
Accrued salaries and wages		5,042			5,737
Accrued health benefits		985			989
Current portion of pension liability		165			1,139
Restructuring accrual		152			233
Advance billings on customer contracts		19,279			21,595
Other accrued expenses		5,471			3,345
Total current liabilities		48,334			46,204
Deferred income taxes — non-current		1,921			1,579
Pension liability — non-current portion		2,037			1,980
Long-term debt — non-current portion		1,702			1,796
Environmental remediation — non-current portion		3,812			4,033
Total liabilities		57,806			55,592
Commitments and contingencies
Shareholders’ Equity:
Preferred stock, no par value; 200,000 shares authorized, none outstanding		—			—
Common stock, $1.25 par value; 15,000,000 shares authorized, 10,236,484 and 10,200,534 shares outstanding, respectively		12,796			12,751
Capital in excess of par value		20,346			19,864
Retained earnings		43,064			35,026
Accumulated other comprehensive loss		(2,952	)		(3,372	)
Total shareholders’ equity		73,254			64,269
Total liabilities and shareholders’ equity	$	131,060		$	119,861

(a) Derived from the Company’s audited financial statements as of June 30, 2010.

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SPARTON CORPORATION AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(UNAUDITED)

(Dollars in thousands, except share data)

	For the Three Months Ended						For the Nine Months Ended
	March 31, 2011			March 31, 2010			March 31, 2011			March 31, 2010
Net sales	$	50,352		$	38,637		$	142,450		$	133,964
Cost of goods sold		42,150			33,068			119,675			112,888
Gross profit		8,202			5,569			22,775			21,076
Operating Expense:
Selling and administrative expenses		5,143			4,328			15,666			14,017
Internal research and development expenses		282			—			564			—
Amortization of intangible assets		127			118			347			352
Restructuring/impairment charges		—			238			77			2,121
Gain on acquisition		—			—			(2,400	)		—
Gain on sale of property, plant and equipment, net		(121	)		—			(139	)		—
Other operating expenses		92			507			296			1,120
Total operating expense		5,523			5,191			14,411			17,610
Operating income		2,679			378			8,364			3,466
Other income (expense)
Interest expense		(178	)		(193	)		(529	)		(655	)
Interest income		32			32			118			48
Gain on sale of investment		—			201			—			201
Other, net		105			139			300			255
Total other income (expense), net		(41	)		179			(111	)		(151	)
Income before provision for (benefit from) income taxes		2,638			557			8,253			3,315
Provision for (benefit from) income taxes		115			(132	)		215			(2,027	)
Net income	$	2,523		$	689		$	8,038		$	5,342
Income per share of common stock:
Basic	$	0.25		$	0.07		$	0.79		$	0.54
Diluted	$	0.25		$	0.07		$	0.78		$	0.54
Weighted average shares of common stock outstanding:
Basic		10,223,928			9,978,507			10,211,187			9,964,711
Diluted		10,269,489			9,998,419			10,243,961			9,964,711

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SPARTON CORPORATION AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(UNAUDITED)

(Dollars in thousands)

	For the Nine Months Ended
	March 31, 2011			March 31, 2010
Cash Flows from Operating Activities:
Net income	$	8,038		$	5,342
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		1,076			1,067
Deferred income tax expense		342			307
Pension expense		427			1,085
Stock-based compensation expense		502			445
Non-cash restructuring/impairment charges		—			252
Gain on sale of property, plant and equipment, net		(139	)		—
Gain on acquisition		(2,400	)		—
Gain on sale of investment		—			(201	)
Other		261			181
Changes in operating assets and liabilities:
Accounts receivable		(2,562	)		19,953
Income taxes receivable		(8	)		(826	)
Inventories and cost of contracts in progress		(1,602	)		9,628
Prepaid expenses and other assets		(602	)		469
Advance billings on customer contracts		(2,316	)		(12,913	)
Accounts payable and accrued expenses		2,428			(19,841	)
Net cash provided by operating activities		3,445			4,948
Cash Flows from Investing Activities:
Purchase of certain contract manufacturing assets of Delphi Medical		(8,419	)		—
Purchase of certain assets of Byers Peak		(4,350	)
Additional goodwill from SMS acquisition		—			(977	)
Change in restricted cash		3,162			(3,151	)
Purchases of property, plant and equipment		(2,274	)		(1,041	)
Proceeds from sale of property, plant and equipment		4,039			450
Proceeds from sale of investment		—			525
Net cash used in investing activities		(7,842	)		(4,194	)
Cash Flows from Financing Activities:
Net short-term bank repayments		—			(15,500	)
Repayment of long-term debt		(98	)		(4,485	)
Payment of debt financing costs		—			(886	)
Proceeds from the exercise of stock options		25			—
Net cash used in financing activities		(73	)		(20,871	)
Net decrease in cash and cash equivalents		(4,470	)		(20,117	)
Cash and cash equivalents at beginning of period		30,589			36,261
Cash and cash equivalents at end of period	$	26,119		$	16,144
Supplemental disclosure of cash flow information:
Cash paid for interest	$	274		$	422
Cash paid (received) for income taxes	$	(81	)	$	5

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SPARTON CORPORATION AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY

(UNAUDITED)

(Dollars in thousands, except share data)

	Nine Months Ended March 31, 2011
	Common Stock				Capital In Excess of Par Value			Retained Earnings		Accumulated Other Comprehensive Income (Loss)			Total
	Shares		Amount
Balance at June 30, 2010		10,200,534	$	12,751	$	19,864		$	35,026	$	(3,372	)	$	64,269
Issuance of stock		30,950		39		(39	)		—		—			—
Exercise of stock options		5,000		6		19			—		—			25
Stock-based compensation expense		—		—		502			—		—			502
Comprehensive income, net of tax:
Net income		—		—		—			8,038		—			8,038
Change in unrecognized pension costs		—		—		—			—		420			420
Comprehensive income														8,458
Balance at March 31, 2011		10,236,484	$	12,796	$	20,346		$	43,064	$	(2,952	)	$	73,254
	Nine Months Ended March 31, 2010
	Common Stock				Capital In Excess of Par Value			Retained Earnings		Accumulated Other Comprehensive Income (Loss)			Total
	Shares		Amount
Balance at June 30, 2009		9,951,507	$	12,439	$	19,671		$	27,586	$	(4,801	)	$	54,895
Issuance of stock		27,000		34		(34	)		—		—			—
Stock-based compensation expense		—		—		445			—		—			445
Comprehensive income, net of tax:
Net income		—		—		—			5,342		—			5,342
Change in unrecognized pension costs		—		—		—			—		956			956
Comprehensive income		—		—		—			—		—			6,298
Balance at March 31, 2010		9,978,507	$	12,473	$	20,082		$	32,928	$	(3,845	)	$	61,638

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SPARTON CORPORATION AND SUBSIDIARIES

SELECT SEGMENT INFORMATION

(UNAUDITED)

(Dollars in thousands)

Sales:

	Third Quarter									First Nine Months of Fiscal Year
SEGMENT	2011			2010			% Chg			2011			2010			% Chg
Medical	$	25,377		$	14,228			78	%	$	70,072		$	51,142			37	%
EMS		12,291			13,076			(6	)%		35,131			45,003			(22	)%
DSS		16,350			14,293			14	%		47,126			46,660			1	%
Eliminations		(3,666	)		(2,960	)		24	%		(9,879	)		(8,841	)		12	%
Totals	$	50,352		$	38,637			30	%	$	142,450		$	133,964			6	%

Gross profit:

	Third Quarter										First Nine Months of Fiscal Year
SEGMENT	2011		GP %			2010		GP %			2011		GP %			2010		GP %
Medical	$	3,554		14	%	$	1,474		10	%	$	9,211		13	%	$	6,871		13	%
EMS		1,364		11	%		620		5	%		3,020		9	%		2,349		5	%
DSS		3,284		20	%		3,475		24	%		10,544		22	%		11,856		25	%
Totals	$	8,202		16	%	$	5,569		14	%	$	22,775		16	%	$	21,076		16	%

Operating income (loss):

	Third Quarter												First Nine Months of Fiscal Year
SEGMENT	2011			% of Sales			2010			% of Sales			2011			% of Sales			2010			% of Sales
Medical	$	2,044			8	%	$	327			2	%	$	6,691			10	%	$	3,733			7	%
EMS		568			5	%		(426	)		(3	)%		559			2	%		(1,189	)		(3	)%
DSS		2,068			13	%		2,784			19	%		7,459			16	%		9,861			21	%
Other Unallocated		(2,001	)		—			(2,307	)		—			(6,345	)		—			(8,939	)		—
Totals	$	2,679			5	%	$	378			1	%	$	8,364			6	%	$	3,466			3	%

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