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序号	专利名	申请号	申请日	公开（公告）号	公开（公告）日	发明人
1	METHOD FOR SENSING WELDED CONTACTS ON A SWITCHING DEVICE	US14266198	2014-04-30	US20140340090A1	2014-11-20	Jeffrey P Lothamer; Daniel L. Kelly
A method for sensing a welded relay contact when breaking both sides of a power line on a HVAC device including the steps: applying a first signal to one of a pair of switching devices; electronically sensing a second signal, with a sensing device, whether the other of said two switching devices is welded closed; and sending a third signal from the sensing device indicative of whether the other of said two switching devices is welded closed.
2	Dust cover for automatic telephone switches	US16764350	1950-06-12	US2658960A	1953-11-10	PEARSALL LUTHER D

3	Split ring cord guide for step-by-step switches	US71705246	1946-12-18	US2457588A	1948-12-28	MILLER VICTOR F

4	Automatic switch as used in telephone or like systems	US19682538	1938-03-19	US2186313A	1940-01-09	DENIS WRIGHT

5	faller	US1565235D		US1565235A	1925-12-08

6	Step-by-step motor	US54305822	1922-03-11	US1536021A	1925-04-28	SANTEN KOLFF PETRUS VAN

7	Isothermal electromagnetic apparatus	US20047550	1950-12-12	US2692961A	1954-10-26	WILLIAM FONDILLER

8	Wiper cord fastener for stepping switches	US78356647	1947-11-01	US2529426A	1950-11-07	SHOOPMAN BERTRAM H

9	Telephone system	US30446139	1939-11-15	US2248212A	1941-07-08	ALBERT WALTER P

10	Telephone switch	US10182536	1936-09-21	US2194051A	1940-03-19	KONRAD MULLER

11	Frame support	US20353138	1938-04-22	US2191637A	1940-02-27	WIER ANTHONY J

12	Power operating mechanism	US50985631	1931-01-19	US2107110A	1938-02-01	EATON WILFRED A; STEPHEN VORECH

13	Multiple brush selector	US4529335	1935-10-16	US2092624A	1937-09-07	MAX MEMELSDORFF

14	Director	US71971924	1924-06-13	US1593591A	1926-07-27	NELSON MARTIN L

15	Rotary selector switch	US58662122	1922-09-07	US1521871A	1925-01-06	GERALD DEAKIN

16	Method for sensing welded contacts on a switching device	US14266198	2014-04-30	US09897656B2	2018-02-20	Jeffrey P Lothamer; Daniel L Kelly
A method for sensing a welded relay contact when breaking both sides of a power line on a HVAC device including the steps: applying a first signal to one of a pair of switching devices; electronically sensing a second signal, with a sensing device, whether the other of said two switching devices is welded closed; and sending a third signal from the sensing device indicative of whether the other of said two switching devices is welded closed.
17	Remote control rotary switch	US4130060	1960-07-07	US3140433A	1964-07-07	STOFFELS ROBERT E

18	Mirror position indicating device for telephone switches	US65097646	1946-02-28	US2523627A	1950-09-26	OSSIAN JORGENSEN ANDERS

19	Telephone exchange apparatus	US34822340	1940-07-29	US2415437A	1947-02-11	MCBERTY FRANK R

20	Switching mechanism	US51538443	1943-12-23	US2410432A	1946-11-05	DRAKE PERCY B

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